144 results on '"linalol"'
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2. L'huile essentielle de Néroli bigarade.
- Author
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Laurain-Mattar, Dominique, Couic-Marinier, Françoise, and Aribi-Zouioueche, Louisa
- Abstract
Copyright of Actualités Pharmaceutiques is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
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3. AVALIAÇÃO DA ATIVIDADE ANTIMICROBIANA E DA COMPOSIÇÃO QUÍMICA DO ÓLEO ESSENCIAL DE ANIBA DUCKEI.
- Author
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GOMES, Paulo Roberto Barros, SOUZA, Rômicy Dermondes, LOUZEIRO, Hilton Costa, MARINHO, Silvio Carvalho, and MOUCHREK FILHO, Victor Elias
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ESSENTIAL oils , *DRUG resistance in bacteria , *ENTEROCOCCUS faecalis , *KLEBSIELLA pneumoniae , *FOOD pathogens , *GAS chromatography , *AEROMONAS hydrophila - Abstract
Background: The drugs normally used to combat food pathogens have some limitations, such as waste accumulation in the environment and bacterial resistance. Given this problem, alternative treatments, such as the use of essential oils, have been investigated. Essential oils containing linalool usually have high biological activity, despite this, few investigations have been dedicated to the biological activity of the essential oil of Aniba duckei, which has as major component linalool. Aim: In this work, we investigate the chemical composition and antimicrobial activity of the essential oil of the leaves of Aniba duckei obtained by hydrodistillation. Methods: The leaves and branches of the species Aniba duckei were collected in the state of Amazonas, Brazil, in the morning. The essential oil was obtained by the hydrodistillation method and characterized by GC/MS gas chromatography to identify the major components present in the oil. Soon after, the biological activity of the essential oil was tested using the Bauer Kirby method. The strains tested were Aeromonas caviae, Aeromonas hydrophila, Enterococcus faecalis and Klebsiella pneumoniae. Results and Discussion: The findings show that the major component of the oil is linalool. The most relevant secondary components are α-terpineol, α-copaene and α-guaieno. As for biological activity, it was observed that the oil showed inhibition halos ranging from 10-22 mm, indicating strong activity against the microorganisms tested. Conclusions: The essential oil of Aniba duckei has potential for application as an antimicrobial agent. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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4. LAVANDULA ANGUSTIFOLIA MILLER UÇUCU YAĞI ÜZERİNDE FARMAKOGNOZİK ARAŞTIRMALAR.
- Author
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KIZILAY, Harun and ŞARER, Engin
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ESSENTIAL oils , *FLOWERING of plants , *TRADITIONAL medicine , *LAVENDERS , *LINALOOL - Abstract
Lavandula species are plants that are used in treatment, perfumery, food, cosmetics, and pharmaceutical industries due to the compounds they contain. Lavandula angustifola Miller plant, which is the subject of the research, is used to treat various diseases in folk medicine. The plant is widely cultivated in our country. Lavandula species are especially important because of the essential oil they contain, as well as their various active ingredients. Lavandula angustifolia Miller is the species that has more and the most valuable essential oil than other species. In addition, the essential oils of Lavandula latifolia and Lavandula hybrida are also of commercial importance. The plant has been collected from Keçiborlu district of Isparta province in this study. The plant's flowering tops have been distilled, and essential oil has been obtained at the rate of 3.39% (v/w) on the dry weight. This essential oil obtained from Lavandula angustifolia has been analyzed by using GC-MS, and 34 compounds have been detected. As the main components in essential oil; linalool (47.66%), 1.8-cineol (9.10%), linalyl acetate (7.65%) and camphor (6.46%) have been detected. According to the results of this research, the essential oil obtained from Lavandula angustifola is an essential oil that can be evaluated in the food, cosmetic, soap, and pharmaceutical industries and the fields of phytotherapy and aromatherapy due to its composition which is similar to lavandin essence. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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5. A comparative evaluation of chemical composition and antimicrobial activities of essential oils extracted from different chemotypes of Cinnamomum camphora (L.) Presl.
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Wan, N., Li, Y., Huang, X. Y., Li, Y. H., Zheng, Q., and Wu, Z. F.
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CINNAMOMUM , *CHEMICAL composition of plants , *ESSENTIAL oils , *FOOD poisoning , *ANTI-infective agents , *CARYOPHYLLENE , *LINALOOL , *PRINCIPAL components analysis , *FOOD preservatives , *MONOTERPENES - Abstract
The purpose of this study is to determine the chemical composition of the essential oils of Cinnamomum camphora (L.) Presl leaves (CCPL) from 5 different habitats in China by GC-MS, and to evaluate their antimicrobial activities against 3 foodborne pathogens, using a paper disc diffusion method. A total of 30 compounds were identified with a predominance of oxygenated monoterpenes, including linalool (42.65%-96.47%), eucalyptol (39.07%-55.35%) and camphor (26.08%) as well as monoterpene hydrocarbons such as sabinene (6.18%-12.93%) and α-terpineol (8.19%-13.81%). Through cluster analysis, CCPL from 5 different habitats can be well divided into 2 categories. Combining with principal component analysis, the habitats can be better correlated with the chemical constituents of the essential oils. The antimicrobial activities of 5 extracted essential oils against 2 gram-negative bacteria and one gram-positive bacteria were assessed. It showed that the essential oil extracted from the CCPL harvested in Jinxi had the strongest antibacterial property. The results of this study provided basis for resource identification of CCPL and quality difference identification of essential oils. Research on the antibacterial properties of several pathogenic strains has proved its application value as a natural food preservative. [ABSTRACT FROM AUTHOR]
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- 2022
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6. Seasonal variation in essential oil content and chemical profile of mint in southeast of Brazil.
- Author
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Pereira Alvarenga, Joyce, Flores Braga, Andreísa, Ventorim Pacheco, Fernanda, Alves de Carvalho, Alexandre, Brasi Pereira Pinto, José Eduardo, and Vilela Bertolucci, Suzan Kelly
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ESSENTIAL oils , *SEASONS , *GAS chromatography/Mass spectrometry (GC-MS) , *SPEARMINT , *PEPPERMINT , *MENTHONE , *MENTHOL - Abstract
This study evaluated the influence of seasonality in essential oil (EO) chemical composition of Mentha x piperita L. and Mentha viridis L. grown in southeast of Brazil. Leaves were collected from November 2011 until August 2013, in the middle of the following seasons: Spring (November), Summer (February), Autumn (May) and Winter (August). EO extraction was carried out by hydrodistillation in Clevenger apparatus for 1 hour. Chemical composition of EO was analyzed by GC-FID and GC-MS. The EO content and its chemical composition were influenced by seasonality in both species. The highest EO content was obtained for M. x piperita during spring (4.26%) and for M. viridis during spring (3.30%) and summer (3.70%). Mentha x piperita increased menthol (16.31 to 41.26%), neomenthol (3.02 to 6.39%) and menthone (5.56 to 41.58%) contents during spring and summer, respectively. Whereas, M. viridis EO content did not show a quality response pattern in relation to seasonality. Therefore, harvest time for M. x piperita is recommended during spring, and for M. viridis is recommended during spring and summer. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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7. Induced volatiles in the interaction between soybean (Glycine max) and the Mexican soybean weevil (Rhyssomatus nigerrimus).
- Author
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Espadas-Pinacho, K., López-Guillén, G., Gómez-Ruiz, J., and Cruz-López, L.
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CURCULIONIDAE ,MASS spectrometry ,RF values (Chromatography) ,LINALOOL - Abstract
Copyright of Brazilian Journal of Biology is the property of Instituto Internacional de Ecologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
8. Huile essentielle de Petit grain bigarade.
- Author
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Couic-Marinier, Françoise and Laurain-Mattar, Dominique
- Abstract
L'huile essentielle (HE) de Petit grain bigarade a une composition assez proche de celle de l'HE de Lavande officinale, mais son odeur est très différente. Des études scientifiques ont validé ses nombreuses propriétés liées à sa richesse en linalol et en acétate de linalyle. Sa toxicité, quasiment nulle, explique que cette HE soit devenue incontournable dans le conseil pharmaceutique. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
9. Huile essentielle de Lavande aspic.
- Author
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Couic-Marinier, Françoise and Laurain-Mattar, Dominique
- Abstract
L'huile essentielle de Lavande aspic est couramment employée en thérapeutique aromatique. À l'inverse de celle de Lavande officinale, avec laquelle elle est souvent confondue par les néophytes, elle a fait l'objet de peu d'études scientifiques. Sa composition très variée est à l'origine de ses nombreuses et très intéressantes indications. Sa toxicité potentielle doit être prise en compte. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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10. Propagação in vitro de sacaca (Croton cajucara Benth.): entendimentos sobre a dificuldade no desenvolvimento de protocolos de micropropagação da espécie
- Author
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Tatiane Loureiro da Silva, Maria Aparecida Alves Pereira, and Jonny Everson Scherwinski-Pereira
- Subjects
Amazônia ,Croton spp. ,Contaminação microbiana ,Linalol ,Plantas medicinais ,Organogênese ,Science ,Biology (General) ,QH301-705.5 - Abstract
A sacaca é uma planta medicinal do bioma Amazônico e tem sido considerada como substituta do pau-rosa (Aniba roseodora) na produção de linalol. Este trabalho objetivou avaliar a propagação vegetativa in vitro de sacaca, incluindo o estabelecimento de propágulos do campo, protocolos de descontaminação e a determinação de taxas de multiplicação, além de descrever aspectos limitantes da cultura durante os trabalhos in vitro. Foram utilizadas microestacas de 1,0 cm, com uma gema axilar, coletadas de plantas adultas do campo. Tratamentos de desinfestação foram testados no estabelecimento, além de se avaliar a influência do mês do ano da coleta sobre as taxas de contaminação. Após desinfestadas, as microestacas foram inoculadas em tubos de ensaio com meio MS, suplementado com BAP (0, 1, 2 e 3 mg L-1) e AG3 (0 e 0,5 mg L-1). Foi obtido o estabelecimento in vitro da sacaca com 41,9% das microestacas brotadas. A taxa de contaminação alcançou 58,1% (65,4% de origem fúngica e 34,6% de origem bacteriana), com maior ocorrência quando os propágulos foram coletados entre os meses de outubro e janeiro, os mais chuvosos da região amazônica. O aumento nas concentrações de BAP e AG3 no meio de cultura melhorou as taxas de multiplicação do material. Apesar dos resultados obtidos, a espécie apresenta uma série de peculiaridades e limitações ao cultivo in vitro que foram identificadas e relatadas neste trabalho.
- Published
- 2015
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11. Enantiomeric differentiation of three key volatile compounds in three different palm wines (Elaeis guineensis, Borassus flabellifer and Nypa fruticans).
- Author
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Lasekan, Ola
- Subjects
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PALM wine , *ACETOIN , *ENANTIOMERS - Abstract
The contents and enantiomeric distributions of three chiral compounds, linalool, phenylethanol and acetoin, were investigated in three different palm wines (i.e. Elaeis guineensis, Borassus flabellifer, and Nypa fruticans). While N. fruticans and B. flabellifer wines were predominated with the (S)-enantiomers of linalool, phenylethanol and acetoin, respectively, E. guineensis wine contained acetoin primarily as (R)-enantiomers in addition to the (S)-forms of linalool and phenylethanol. Interestingly, results revealed a high level of acetoin in all wines with concentrations ranging from 2437 to 6611 µg/L and an average ratio of S/R of 4:96-100:0. Moreover, noticeable differences occurred in the enantiomeric ratios and concentrations of enantiomers of the chiral compounds during storage. In all the wines, concentration of the (S)-form decreased during storage, whereas those of the (R)-form increased. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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12. Susceptibility of cariogenic microorganisms to phytoconstituents.
- Author
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Ferreira, G. L. S., Bezerra, L. M. D., Ribeiro, I. L. A., Morais Júnior, R. C. D., and Castro, R. D.
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CARIOGENIC agents ,STREPTOCOCCUS ,CITRONELLOL ,BACTERICIDES ,LINALOOL - Abstract
Copyright of Brazilian Journal of Biology is the property of Instituto Internacional de Ecologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
13. Adsorption of Linalool on Cellulose and Pectin
- Author
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Sokolović, Silvija and Kopjar, Mirela
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pectin ,linalool ,celuloza ,BIOTEHNIČKE ZNANOSTI. Prehrambena tehnologija ,BIOTECHNICAL SCIENCES. Food Technology ,linalol ,pektin ,FTIR-ATR ,cellulose ,DSC - Abstract
U ovom radu pripremili smo enkapsulate polisaharida (celuluoze i pektina) u udjelu od 1% s otopinom linalola. Suhi kompleksi analizirani su GC-MS metodom s ciljem utvrđivanja količine adsorbiranog linalola na polisaharide, DMK metodom s ciljem utvrđivanja promjene temperature taljenja kompleksa u odnosu na polisaharide i FTIR metodom s ciljem utvrđivanja strukturnih promjena u odnosu na polisaharide. Rezultati ovog istraživanja pokazali su da celuloza ima viši afinitet prema linalolu u odnosu na pektin. Adsorpcija linalola povećava termičku stabilnost pektina dok smanjuje termičku stabilnost celuloze. In this study, 1% of polysaccharides (cellulose and pectin) was encapsulated together with linalool solution. Dry complexes were analyzed with the GC-MS method in order to determine the amount of adsorbed linalool, with DSC method in order to determine the difference between the melting temperature of the complex and polysaccharide, and with FTIR method in order to determine the structural changes. The results of this research showed that cellulose has a higher affinity for linalool in comparison to pectin. Adsorption of linalool improves thermal stability of pectin and decreases thermal stability of cellulose.
- Published
- 2022
14. Lippia alba essential oil in the transport of cururu stingrays (Potamotryogon wallacei): effects on tissue biomarkers
- Author
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Ariotti, Karine, Pavanato, Maria Amália, Garcia, Luciano de Oliveira, and Bianchini, Adriane Erbice
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CIENCIAS BIOLOGICAS::FARMACOLOGIA [CNPQ] ,Linalol ,Elasmobrânquios ,Potamotrygonids ,Potamotrygonideos ,Elasmobranchs ,Linalool - Abstract
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES The ornamental fish trade generates income for the riverside population of the state of Amazonas in Brazil. Amazonian species are in greater demand because they are often endemic, which values them. The cururu stingray (Potamotryogon wallacei) is a widely sought after species for aquarium hobby, with export as the main market. This work investigated the impact of transport for long hours on water quality, stress response, antioxidant defense system of the can cururu stingray liver and how the recovery process would occur. The effects of Lippia alba essential oil (EOLA) were also studied against the changes imposed by transport. The stingrays cururu (n = 30) were transported in plastic bags (3 to 4 specimens, each bag) in the absence or presence of EOLA at 10 μL/L from Manaus (Amazonas, Brazil) to Santa Maria (Rio Grande do Sul, Brazil) for about 32 h. A group of cururu stingrays was sampled immediately on arrival (n = 5 for each condition, with or without EOLA). The remaining individuals were kept for 24 h (n = 5 for each condition, without or with EOLA) and 48 h (n = 5 for each condition, without or with EOLA) to assess the recovery from the trip. Afterwards, they were anesthetized for blood collection and then euthanized to remove the liver. A group of cururu stingrays was sampled before starting the transport protocol (n = 5). Water samples were collected during all stages to monitor their quality. First, when transport was performed in the absence of EOLA, it resulted in higher levels of ammonia in the water linked to a hyperglycemic response and an impairment in the glutathione-related antioxidant system characterized by decreased total glutathione and catalytic subunit of cysteine glutamate levels. ligase, as well as glutathione S-transferase and glucose-6-phosphate dehydrogenase activities, leading the cururu stingray liver to lipid peroxidation upon arrival. EOLA, in turn, avoided most transport-induced changes on arrival. Furthermore, it also helped the antioxidant system to regain its optimal liver function after 48 h of recovery, speeding up the recovery process that could take more than 48 h when transport was completed in the absence of this additive. Therefore, the addition of EOLA to the transport water at 10 μL/L is highly advisable when transporting cururu stingrays for more than 30 h. O comércio de peixes ornamentais gera renda para a população ribeirinha do estado do Amazonas no Brasil. Espécies Amazônicas possuem maior procura por serem muitas vezes endêmicas, o que as valoriza. A arraia cururu (Potamotryogon wallacei) é uma espécie amplamente procurada para aquariofilia, tendo a exportação como principal mercado. Este trabalho investigou o impacto do transporte por longas horas na qualidade da água, resposta ao estresse, sistema de defesa antioxidante do fígado da arraia cururu e como ocorreria o processo de recuperação. Também foi estudado os efeitos do óleo essencial de Lippia alba (EOLA) frente as alterações impostas pelo transporte. A arraias cururu (n = 30) foram transportadas em sacos plásticos (de 3 a 4 exemplares, em cada saco) na ausência ou presença de EOLA a 10 μL/L de Manaus (Amazonas, Brasil) para Santa Maria (Rio Grande do Sul, Brasil) por cerca de 32 h. Um grupo de arraias cururu foi amostrado imediatamente na chegada (n = 5 para cada condição, sem ou com EOLA). Os demais indivíduos foram mantidos por 24 h (n = 5 para cada condição, sem ou com EOLA) e 48 h (n = 5 para cada condição, sem ou com EOLA) para avaliar a recuperação da viagem. Após, foram anestesiados para coleta de sangue e, em seguida, eutanasiados para retirada do fígado. Um grupo de arraias cururu foi amostrado antes de iniciar o protocolo de transporte (n = 5). Amostras de água foram coletadas durante todas as etapas para monitoramento de sua qualidade. Em primeiro lugar, quando o transporte foi realizado na ausência de EOLA, resultou em níveis mais altos de amônia na água relacionada a uma resposta hiperglicêmica e um comprometimento no sistema antioxidante relacionado à glutationa caracterizado por glutationa total diminuída e subunidade catalítica dos níveis de glutamato cisteína ligase, bem como as atividades de glutationa S-transferase e glicose-6-fosfato-desidrogenase, levando o fígado da arraia cururu à peroxidação lipídica em sua chegada. O EOLA, por sua vez, evitou a maioria das mudanças induzidas pelo transporte na chegada. Além disso, também ajudou o sistema antioxidante a recuperar sua função ideal no fígado após 48 h de recuperação, acelerando o processo de recuperação que poderia levar mais de 48 h quando o transporte fosse concluído na ausência desse aditivo. Portanto, a adição de EOLA à água de transporte a 10 μL/L é altamente recomendável para o transporte de arraias cururu por mais de 30 h.
- Published
- 2022
15. Teor e composição do óleo essencial de quatro acessos e duas cultivares de manjericão (Ocimum basilicum L.)
- Author
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R.A. Veloso, H.G. Castro, L.C.A Barbosa, D.P. Cardoso, A.F. Chagas Júnior, and G.N. Scheidt
- Subjects
Ocimum basilicum ,óleo essencial ,linalol ,constituição química ,recursos genéticos vegetais ,Pharmacy and materia medica ,RS1-441 ,Botany ,QK1-989 - Abstract
O objetivo desse estudo foi avaliar o teor e a composição química dos óleos essenciais de quatro acessos silvestres de manjericão (Ocimum basilicum L.), provenientes de diferentes regiões geográficas, e duas cultivares comerciais cultivados sob as mesmas condições edafoclimáticas. As sementes dos acessos foram coletadas nos município de Gurupi-TO (GUR) e de Monte Alegre-GO (MAL, MVE e FPS) e as sementes da cultivar comercial manjericão roxo (MR) foram adquiridas no comércio de Gurupi e da cultivar Maria Bonita (MB) foram fornecidas pelo Horto de Plantas Medicinais da Universidade Federal de Lavras. O plantio foi realizado em vasos com capacidade de dez litros utilizando-se como substrato: solo de barranco e esterco bovino na proporção 2:1. O óleo essencial foi obtido por hidrodestilação em aparelho tipo Clevenger e a identificação e a porcentagem relativa dos compostos do óleo essencial foi realizada por Cromatografia à Gás acoplada a Detector de Espectrometria de Massas. Foram identificados trinta e nove substâncias nos óleos essenciais obtidos, abrangendo monoterpenos, sesquiterpenos e fenilpropanoides. Nas cultivares MB e MR o composto majoritário foi o linalol, enquanto nos acessos silvestres (MAL, GUR, FPS e MVE) o composto em maior quantidade foi o (E)-cinamato de metila. O maior teor de óleo essencial foi obtido na cultivar Maria Bonita (3,77%).
- Published
- 2014
- Full Text
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16. Efecto de la Lavándula Angustifolia en el manejo de ansiedad, depresión, estrés e insomnio. Revisión bibliográfica de literatura
- Author
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Ramírez López, María Isabel, Navas Olano, María Fernanda, Escobar Leguizamo, María José, Sánchez Ballén, Natalia Carolina, and Barrera Cespedes, Maria Claudia
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Insomnio ,Ansiedad ,Trastornos mentales - Fitoterapia ,Lavandula ,Linalol ,Depresión ,Acciones Farmacológicas ,Phytotherapy - Mental Health ,Medicina complementaria - Salud Mental ,Estrés - Abstract
Ilustraciones, algoritmos, esquemas, fotografías a color y tablas Los trastornos mentales, incluyendo la depresión, la ansiedad, el insomnio y el estrés, son enfermedades que alteran el pensamiento, la percepción, las emociones, la conducta y las relaciones. Su prevalencia mundial es del 10% al 43% y su tratamiento ha asociado efectos adversos y poca adherencia. En este contexto la Fitoterapia brinda una opción terapéutica alternativa para estas patologías a través del uso de la Lavándula angustifolia. Sin embargo, no hay una revisión bibliográfica actualizada que exponga el efecto y mecanismos de acción de sus metabolitos frente a estos trastornos. Mental disorders, including depression, anxiety, insomnia, and stress, are illnesses that alter the process of thought, perception, emotion, behavior, and relationships. Its worldwide prevalence is from 10% to 43% and its treatment has been associated to adverse effects and poor adherence. In this context, Phytotherapy provides an alternative option for these pathologies through the use of Lavandula angustifolia. However, there is no updated literature review that exposes the effect and mechanism of action of its metabolites. Especialización Especialista en Terapéuticas Alternativas y Farmacología Vegetal Especialización en Terapéuticas Alternativas y Farmacología Vegetal
- Published
- 2022
17. Investigation of the antifungal potential of linalool against clinical isolates of fluconazole resistant Trichophyton rubrum.
- Author
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de Oliveira Lima, M.I., Araújo de Medeiros, A.C., Souza Silva, K.V., Cardoso, G.N., de Oliveira Lima, E., and de Oliveira Pereira, F.
- Abstract
Copyright of Journal of Medical Mycology / Journal de Mycologie Médicale is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
- View/download PDF
18. Huile essentielle de Lavande officinale.
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Lobstein, Annelise and Couic-Marinier, Françoise
- Abstract
Résumé Parmi toutes les huiles essentielles (HE), celle de Lavande officinale est certainement la plus universellement connue. Elle a fait l’objet d’une centaine d’études scientifiques validant ses nombreuses propriétés liées à sa richesse en linalol et en acétate de linalyle. Contenant très peu de camphre, sa toxicité est quasiment nulle, d’où l’usage sécuritaire de cette HE, devenue incontournable dans le conseil pharmaceutique. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
19. Evaluación comparativa de la composición química y las actividades antimicrobianas de los aceites esenciales extraídos de diferentes quimiotipos de Cinnamomum camphora (L.) Presl
- Author
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N. Wan, Y. Li, X.Y. Huang, Y.H. Li, Q. Zheng, and Z.F. Wu
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Antimicrobial activities ,Essential oils ,Linalol ,Cinnamomum camphora (L.) Presl ,Aceites esenciales ,Organic Chemistry ,Actividades antimicrobianas ,Bacterias transmitidas por los alimentos ,Foodborne bacteria ,Linalool ,Food Science - Abstract
The purpose of this study is to determine the chemical composition of the essential oils ofCinnamomum camphora(L.) Presl leaves (CCPL) from 5 different habitats in China by GC-MS, and to evaluate their antimicrobial activities against 3 foodborne pathogens, using a paper disc diffusion method. A total of 30 compounds were identified with a predominance of oxygenated monoterpenes, including linalool (42.65%-96.47%), eucalyptol (39.07%-55.35%) and camphor (26.08%) as well as monoterpene hydrocarbons such as sabinene (6.18%-12.93%) and α-terpineol (8.19%-13.81%). Through cluster analysis, CCPL from 5 different habitats can be well divided into 2 categories. Combining with principal component analysis, the habitats can be better correlated with the chemical constituents of the essential oils. The antimicrobial activities of 5 extracted essential oils against 2 gram-negative bacteria and one gram-positive bacteria were assessed. It showed that the essential oil extracted from the CCPL harvested in Jinxi had the strongest antibacterial property. The results of this study provided basis for resource identification of CCPL and quality difference identification of essential oils. Research on the antibacterial properties of several pathogenic strains has proved its application value as a natural food preservative. El objetivo de este estudio es determinar la composición química de los aceites esenciales de hojas deCinnamomum camphora(L.) Presl (CCPL) de 5 hábitats diferentes de China mediante GC-MS, y evaluar sus actividades antimicrobianas contra 3 patógenos transmitidos por los alimentos, utilizando un método de difusión de disco de papel. Se identificaron un total de 30 compuestos, con predominio de monoterpenos oxigenados, entre ellos linalol (42,65%-96,47%), eucaliptol (39,07%-55,35%) y alcanfor (26,08%) así como hidrocarburos monoterpenos como el sabineno (6,18%-12,93%) y α-terpineol (8,19%-13,81%). A través del análisis de conglomerados, los CCPL de 5 hábitats diferentes se pueden dividir bien en 2 categorías. En combinación con el análisis de componentes principales, los hábitats se pueden correlacionar mejor con los componentes químicos de los aceites esenciales. Se evaluaron las actividades antimicrobianas de 5 aceites esenciales extraídos contra 2 bacterias gramnegativas y una bacteria grampositiva. Se demuestra que el aceite esencial extraído del CCPL cosechado en Jinxi tenía la propiedad antibacteriana más fuerte. Los resultados de este estudio proporcionaron la base para la identificación de recursos de CCPL y la identificación de diferencias de calidad de los aceites esenciales. La investigación sobre las propiedades antibacterianas de varias cepas patógenas ha demostrado su valor de aplicación como conservante natural de alimentos.
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- 2022
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20. Labiatae familyasına özgü yaygın bazı türlerin uçucu yağ bileşenlerinin gc-ms ile miktar tayini, metot validasyonu ve analizi
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Üstün, Sedat, Oral, Elif Varhan, and Dicle Üniversitesi, Sağlık Bilimleri Enstitüsü, Analitik Kimya Ana Bilim Dalı
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Linalol ,Method validation ,Uçucu yağ ,Thyme ,Labiatae ,Essential oil ,Thymol ,Linalool ,Pulegon ,Timol ,Kekik ,Carvacrol ,Origanum ,Pulegone ,GC-MS ,Metot validasyonu ,Karvakrol - Abstract
Amaç: Bu tez çalışmasında, Türkiye'nin Doğu ve Güneydoğu Anadolu bölgesinden toplanan ve halk arasında yaygın bir şekilde çay ve baharat olarak kullanılan bazı türlerin Clevenger aparatı ile uçucu yağları hazırlanmıştır. Bu türlere özgü bileşenler piyasadan temin edilerek bu türleri içeren bir GC-MS miktarsal tayin yöntemi geliştirilip valide edilmesi amaçlanmıştır. Ayrıca bu türlerin bu bileşenler bakımından içerikleri belirlenmiştir. Gereç ve Yöntem: α-Pinen, kamfen, α-fellandren, p-simen, limonen, ökaliptol (1,8-sineol), β-osimen, γ-terpinen, linalol, kafur, sitronellal, menton, borneol, mentol, α-terpineol, cis-geraniol, pulegon, L-karvon, linalil asetat, bornil asetat, timol, karvakrol, β-karyofillen bileşenleri ile bir GC-MS yöntemi geliştirilmiş ve doğrulanmıştır. Clevenger aparatı kullanılarak bazı türlerin hidrodestilasyon yöntemi ile uçucu yağları elde edilmiştir. Daha sonra GC-MS ile bu uçucu yağların içerikleri belirlenmiştir. Bulgular: Çalışılan Thymbra türlerinin hepsinde ortak ana bileşenin karvakrol, Salvia ve Mentha türlerinde ökaliptol (1,8-sineol), Origanum türlerinde p-simen ve Lavandula türlerinde linalol olduğu görülmüştür. Thymus pubescens var. crateicola türünün timol, Cyclotrichium origanifolium türünün pulegon, Achillea vermicularis türünün ökaliptol, Teucrium polium türünün β-karyofillen, Zizphora clinopdioides türünün pulegon bileşenleri açısından zengin olduğu tespit edilmiştir. Sonuç: Ülkemizin Doğu ve Güneydoğu bölgelerinde yetişen ve halk arasında yaygın olarak kullanılan Thymus, Thymbra, Salvia, Satureja, Lavandula, Origanum, Mentha, Achillea, Teucrium, Ziziphora, Cyclotrichium, Stachys cinslerine ait bazı türlerin uçucu yağlarının majör bileşenleri tespit edilip kaynak tür olma potansiyelleri yönünden analizleri gerçekleştirilmiştir. Özellikle Thymbra türlerinin karvakrol, Cyclotrichium origanifolium türünün pulegon ve Lavandula türlerinin linalol bileşenleri için kaynak tür olabileceği bulunmuştur. Aim: In this thesis, the essential oils of some species collected from the Eastern and Southeastern Anatolia regions of Turkey and widely used as tea and spice among the people were prepared with the Clevenger apparatus. It is aimed to develop and validate a GC-MS quantification method that includes special components are provided from the market to these species. In addition, the contents of these species in terms of these components were determined. Material and Method: A GC-MS method was developed and validated with the components which including α-Pinene, camphene, α-fellandrene, p-cymene, limonene, eucalyptol (1,8-cineol), β-ocimene, γ-terpinene, linalool, camphor, citronellal, menthone, borneol, menthol, α-terpineol, cis -geraniol, pulegon, L-carvone, linalyl acetate, bornyl acetate, thymol, carvacrol, β-caryophyllene. Essential oils of some species were obtained by hydrodistillation method using Clevenger apparatus. Then, the contents of these essential oils were determined by GC-MS. Results: It was seen that, the common main component's in all studied Thymbra species were carvacrol, in all Salvia and Mentha species were eucalyptol (1,8-cineol), in all Origanum species were p-cimen, and in all Lavandula species were linalool found.It was detected that, Thymus pubescens var. crateicola is rich in thymol, Cyclotrichium origanifolium is rich in pulegon, Achillea vermicularis is rich in eucalyptol, Teucrium polium is rich in β-caryophyllene, Zizphora clinopdioides is rich in pulegon components. Conclusion: The major components of the essential oils of some species of Thymus, Thymbra, Salvia, Satureja, Lavandula, Origanum, Mentha, Achillea, Teucrium, Ziziphora, Cyclotricium, Stachys which are grown in the Eastern and Southeastern regions of our country and are widely used among the people, were determined and analyzed in terms of their potential to be source species. It was found that especially Thymbra spp. carvacrol, Cyclotricium origanifolium spp. pulegon and Lavandula spp. can be source species for linalool components. Dicle Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü (DÜBAP) tarafından ECZACILIK.21.001 no'lu proje kapsamında desteklenmiştir.
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- 2022
21. Teor e composição do óleo essencial de inflorescências e folhas de Lavandula dentata L. em diferentes estádios de desenvolvimento floral e épocas de colheita Yield and composition of essential oil from inflorescences and leaves of lavender (Lavandula dentata L.) in different flower development stages and harvest times
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M.A.M. Masetto, C. Deschamps, A.F. Mógor, and H.R. Bizzo
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lavanda ,planta aromática ,1,8-cineol ,cânfora ,linalol ,lavender ,aromatic plants ,camphor ,linalool ,Pharmacy and materia medica ,RS1-441 ,Botany ,QK1-989 - Abstract
O óleo essencial de Lavandula dentata L. possui importância econômica devido à utilização nas indústrias farmacêutica, cosmética e de higiene pessoal. O presente trabalho teve como objetivo avaliar o teor e a composição do óleo essencial de inflorescências e folhas de lavanda em diferentes estádios de desenvolvimento. O delineamento experimental foi inteiramente casualizado em esquema fatorial 2 x 3, sendo três estádios de desenvolvimento floral (botão, pré-antese/antese e senescente) e duas épocas de colheita (janeiro e abril), com cinco repetições. As amostras de óleo essencial foram obtidas por hidrodestilação, sendo os constituintes analisados por cromatografia em fase gasosa acoplada à espectrometria de massas (CG/EM). Houve interação entre os fatores épocas de colheita e desenvolvimento floral no teor de óleo essencial das inflorescências, sendo observada média superior em botões florais colhidos em janeiro. Os estádios de desenvolvimento não alteraram o teor do óleo essencial das folhas. Os estádios de desenvolvimento influenciaram nos teores dos constituintes dos óleos essenciais das inflorescências e folhas. No óleo essencial em estádio de flor senescente da colheita de abril, observou-se teor elevado de 1,8-cineol, enquanto nos demais estádios de desenvolvimento os teores foram menores em ambas as épocas de colheita. Teores elevados de cânfora foram observados nos estádios de pré-antese/antese e senescente, na colheita de janeiro. O óleo essencial das folhas apresentou teor superior de 1,8-cineol em ramos com flores em estádio de pré-antese/antese. Os teores de cânfora e fenchona foram superiores em ramos contendo botões. O óleo essencial das folhas de ramos com botões e flores senescentes apresentou teor superior de linalol em relação ao óleo essencial das inflorescências.The essential oil of Lavandula dentata L. has economic importance due to its utilization by pharmaceutical, cosmetic and personal care industries. The aim of this study was to evaluate the yield and composition of essential oil from lavender inflorescences and leaves in different development stages. The experimental design was completely randomized in 2 x 3 factorial arrangement, with three flower development stages (bud, pre-anthesis/anthesis and senescence) and two harvest periods (January and April), and 5 replicates. The essential oil samples were obtained by hydrodistillation, and the compounds were analyzed by gas chromatography coupled to mass spectrometry (GC/MS). There was an interaction between the factors harvest time and flower development on essential oil yield of inflorescences, and a superior average was observed for flower buds harvested in January. The development stages did not alter the essential oil yield of leaves. The development stages influenced the levels of compounds of the essential oil from inflorescences and leaves. For essential oil in senescent flower stage harvested in April, there was a high level of 1,8-cineol, whereas in the remaining development stages, the levels were lower in both harvest times. The levels of camphor increased in the pre-anthesis/anthesis and senescence in January harvest. The essential oil from leaves presented higher levels of 1,8-cineol in branches with flowers in pre-anthesis/anthesis. Camphor and fenchone levels were higher in branches with buds. The essential oil from leaves of branches with buds and senescent flowers showed higher levels of linalool than that from inflorescences.
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- 2011
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22. Avaliação sazonal do rendimento de óleo essencial em espécies de menta Seasonal evaluation of essential oil yield of mint species
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Cícero Deschamps, Jorge Luiz Zanatta, Humberto Ribeiro Bizzo, Marisa de Cácia Oliveira, and Luciane Cristina Roswalka
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Mentha spp. ,óleo essencial ,linalol ,essential oil ,linalool ,Agriculture (General) ,S1-972 - Abstract
O gênero Mentha compreende diversas espécies de interesse econômico por causa da produção de óleos essenciais. Recentemente, foram introduzidos no Brasil novos materiais genéticos para avaliação da adaptação em relação ao potencial de rendimento e composição do óleo essencial. No presente trabalho, foram comparadas essas características em cultivares das espécies Mentha x piperita L. (cv. Grapefruit Mint e cv. Persian Mint Field), M. suaveolens Ehrh. (cv. Hillarys Sweet Lemon Mint), M. spicata L. (cv. Mentol Mint), M. aquatica L. (cv. Common Mint) e M. arvensis L. (cv. Banana Mint), durante o verão e inverno em Curitiba (PR). O rendimento médio das cultivares no verão foi aproximadamente o dobro do rendimento observado no inverno. Duas cultivares de Mentha x piperita L. (cv. Persina Mint Field e cv. Grapefruit Mint) apresentaram maior rendimento de óleo essencial no verão e inverno, sendo que as demais não diferiram entre si. A análise da composição do óleo essencial indicou grande variação nessas cultivares, sendo observada a presença de linalol, como constituinte majoritário na cv. Grapefruit Mint e a-felandren-8-ol e cis-ocimeno na cv. Persian Mint Field.The genus Mentha includes many species of economic interest due the essential oil production. Recently new genetic materials were introduced in Brazil to evaluate the adaptation related to essential oil yield and composition. In the present work, these characteristics were compared in six cultivars of the species Mentha x piperita L. (cv. Grapefruit Mint e cv. Persian Mint Field), M. suaveolens Ehrh (cv. Hillarys Sweet Lemon Mint), M. spicata L. (cv. Mentol Mint), M. aquatica L. (cv. Common Mint) and M. arvensis L. (cv. Banana Mint) during summer and winter in Curitiba (PR). The average of essential oil yield obtained from samples collected during the summer was approximately two fold the observed during the winter. Two cultivars of Mentha piperita (cv. Persian Mint Field and cv Grapefruit Mint) showed great essential oil yield in both seasons, while the others did no show any difference. The analyses of the essential oil composition indicated great variation among the mint cultivars, being observed the presence of linalool as main constituent in cv. Grapefruit mint and a-phellandren-8-ol and cis-ocimene in cv. Persian Mint Field
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- 2008
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23. Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia Padrão geográfico de diversidade genética em populações naturais de Pau-rosa (Aniba rosaeodora), na Amazônia Central
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Ronaldo Pereira Santos, Paula Cristina da Silva Ângelo, Paulo de Tarso Barbosa Sampaio, Regina Caetano Quisen, Ângela Maria Conte Leite, and Cristiane Lopes de Oliveira
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RAPD ,linalol ,fluxo gênico ,floresta úmida amazônica ,linalool ,gene flow ,Amazon Rainforest ,Science (General) ,Q1-390 - Abstract
Rosewood (Aniba rosaeodora Ducke, Lauraceae) is an Amazonian evergreen tree and a source of the purest linalool, the main component of its essential oil, which is very valuable in the international perfumery market. After decades of over-exploitation it is currently considered as threatened. We evaluated the genetic diversity and its distribution in four populations in Central Amazonia. Thirty-five reliable RAPD markers were generated, of which 32 were polymorphic (91.4%). Variation was higher within the populations (76.5%; p < 0.0001) and geographic distribution contributed to population differentiation (23.4%; p < 0.0001). The Amazon River had a small influence on gene flow (3.3%; p < 0.0001), but we identified evidence of gene flow across the river. There were significant differences in marker frequencies (p < 0.05), in agreement with the low gene flow (Nm = 2.02). The correlation between genetic distance and gene flow was - 0.95 (p = 0.06) and between geographic distance and gene flow was -0.78 (p = 0.12). There was a geographic cline of variability across an East-West axis, influenced as well by the Amazon River, suggesting the river could be a barrier to gene flow. Although threatened, these Rosewood populations retain high diversity, with the highest levels in the Manaus population, which has been protected for over 42 years in a Reserve.O Pau-rosa (Aniba rosaeodora Ducke, Lauraceae) é uma árvore amazônica fonte do mais puro linalol, o qual é o principal componente do seu óleo essencial e muito valioso no mercado internacional de perfumaria. Após várias décadas de intensa exploração, a espécie foi levada à categoria de ameaçada de extinção. Quatro populações naturais distribuídas na bacia Amazônia Central foram avaliadas quanto ao nível e a distribuição da diversidade genética. Trinta e cinco marcadores RAPD reprodutíveis foram gerados, dos quais 32 foram polimórficos (91,4%). A diversidade foi maior dentro das populações (76,5%; p < 0,0001) e a distribuição geográfica contribuiu para a diferenciação entre as populações (23,4%; p < 0,0001). A AMOVA indicou que pode haver uma influência parcial do Rio Amazonas no fluxo gênico (3,3%; p < 0,0001), mas foram identificadas evidências de fluxo gênico atravessando o rio. Houve diferenças significativas nas freqüências dos marcadores (p < 0,05) e o fluxo gênico estimado foi relativamente baixo (Nm = 2,02). A correlação entre a distância genética e o fluxo gênico foi de - 0,95 (p = 0,06) e para a distância geográfica e o fluxo gênico foi de - 0,78 (p = 0,12). Houve um padrão geográfico de variabilidade ao longo do eixo Leste - Oeste, influenciado também pelo Rio Amazonas, o que sugere que o rio poderia funcionar como uma barreira para o fluxo gênico. Apesar de ameaçadas, estas populações de Pau-rosa possuem alta diversidade, com o maior valor na população de Manaus, que vem sendo protegida por 42 anos em uma reserva.
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- 2008
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24. Antioxidant action of the diet containing linalol in juveniles of jundiá (Rhamdia quelen) exposed to hypoxy and reoxygenation
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Dornelles, Juan Lameira, Cunha, Mauro Alves da, Zeppenfeld, Carla Cristina, Garcia, Luciano de Oliveira, and Baldissera, Matheus Dellaméa
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Metabolismo ,Estresse ,Metabolism ,Linalol ,Hipóxia ,CIENCIAS AGRARIAS::ZOOTECNIA [CNPQ] ,Stress ,Hypoxia ,Linalool - Abstract
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq Fish farming is in increasingly developing in Brazilian aquaculture production, stimulating fish prooduction. On the other hand, the increase in stocking density can bring losses to the sector, due to greater exposure of fish to diseases and stress caused by hypoxia, causing reduced immunity and greater susceptibility to diseases. For researchers, there is a need to establish safe and prophylactic nutricional technologies, capable of supporting the growth of the aquaculture chain. Some nutritional alternatives, such as the inclusion of linalool in the feed, have shown great zootechnical success for fish, enhancing their growth and health conditions, without restrictions on the toxicity of the meat towards consumers. The aim of this study was to evaluate the physiological changes of different levels of linalol supplementation in the diet of of juveniles of Rhamdia quelen (jundiás) exposed to hypoxia and reoxygenation, against metabolic and biochemical parameters. For this, the fish were placed in 50 L tanks for 30 days of the experiment, in a water recirculation system and constant aeration. Juveniles were divided int three evaluation groups and submitted to three diets containing different levels of linalol (0-control, 0,25 mL and 1,0 mL of Linalol/kg of feed). Feeding took place throughout the experimental period. Upon reaching 25 days of experiment, a repetition of each treatment was sedated and euthanized. From the 25th to the 26th day, the oxygen dissolved in the water of the remaining animals was reduced, until hypoxia was reached. On the 27th day there was a new euthanasia for tissue collection. Afterwards, the reoxygenation of the thanks was started for 48 hours. On the 30th day of the experiment, the last repetition of juveniles was performed, and the tissues needed for matbolic and biochemical analysis were collected. The results showed a reduction in lactate, total proteins, TBARS, and SOD in animals submitted to diets containing linallol, in a hypoxia and reoxygenation situations, when compared to the control group without the addition of this component to the ration. Thus, we conclude that the use of linalool in the diet of R. quelen juveniles, at the concetrations tested, has an antioxidant function that reduces oxidative stress, with better results at concentrations of 1.0 mL of linalool/kg of feed. A piscicultura está em crescente desenvolvimento na produção aquícola brasileira, estimulando a produção de peixes. Em contrapartida, o aumento da densidade de estocagem pode trazer prejuízos ao setor, devido a maior exposição dos peixes ao estresse por hipóxia, ocasionando a redução de imunidade e maior suceptibilidade a enfermidades. Aos pesquisadores, surge a necessidade de estabelecer tecnologias nutricionais seguras e profiláticas, capazes de alicerçar o crescimento da cadeia aquícola. Algumas alternativas nutricionais, como a inclusão de linalol a ração, têm mostrado grande sucesso zootécnico aos peixes, potencializando o seu crescimento e condições de saúde, sem restrições à toxidade da carne para com os consumidores. O objetivo deste estudo foi avaliar as alterações fisiológicas dos diferentes níveis de suplementação de linalol na dieta de juvenis de Rhamdia quelen (Jundiás) expostos à hipóxia e reoxigenação, perante parâmetros metabólicos e bioquímicos. Para isso 72 peixes foram dispostos em tanques de 50 L por 30 dias de experimento, em sistema de recirculação de água e aeração constante. Os juvenis foram divididos em três grupos de avaliação e submetidos a três dietas contendo diferentes níveis de linalol (0-controle, 0,25 mL e 1,0 mL de linalol/kg de ração). A alimentação ocorreu até o dia anterior da exposição por hipóxia. Ao atingir 25 dias de experimento, uma repetição de cada tratamento, totalizando 24 unidades experimentais, foi sedada e eutanasiada (normóxia). Do 25º ao 26º dia, foi reduzido o oxigênio dissolvido na água dos animais restantes, até atingir a hipóxia. No 27º dia houve eutanásia de outros 24 peixes em todos os tratamentos para coleta de tecidos (animais submetidos à hipóxia). Posteriormente a isso, iniciou-se a reoxigenação dos tanques por 48 horas com os 24 animais restantes no experimento. No 30º dia de experimento, a ultima repetição de juvenis foi eutanasiada sendo coletados os tecidos necessários para análises metabólicas e bioquímicas. Os resultados demonstraram uma redução do lactato, proteínas totais, TBARS e SOD dos animais submetidos às dietas contendo linalol, em situação de hipóxia e reoxigenação, quando comparados ao grupo controle sem a adição deste componente na ração. Desta forma concluímos que a utilização do linalol à dieta de juvenis de R. quelen, nas concentrações testadas, tem função antioxidante redutora de estresse oxidativo, com melhores resultados nas concentrações de 1,0 mL de linalol/Kg de ração.
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- 2021
25. Potential action on the central nervous system of neroli oil extracted from Citrus aurantium
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Gabriela Vidal Fernandes, Cassia Aparecida Borba, Thais Bueno da Silva, Rodrigo Vieira Gonzaga, and Jaqueline Campos Campos
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medicine.drug_class ,GABAA receptor ,Anti-anxiety agents ,Linalol ,Biology ,Pharmacology ,Inhibitory postsynaptic potential ,Citrus Aurantium ,Ansiolíticos ,Anxiolytic ,Linalool ,law.invention ,Anti-Anxiety Agents ,law ,Óleos voláteis ,medicine ,General Earth and Planetary Sciences ,Volatile oils ,Receptor ,Aceites volátiles ,5-HT receptor ,Essential oil ,Neroli ,General Environmental Science ,medicine.drug - Abstract
The essential oil from C. aurantium has been widely studied due to its potential anxiolytic action on several receptors in the Central Nervous System (CNS). Although it presents variations in its phytochemical composition depending on its origin, we can highlight that many compounds remain present, such as linalool that demonstrated antagonistic activity on glutamatergic receptors, possible inhibitory action of noradrenaline and serotonin receptors, besides the ability to activate GABA receptors in association with some flavonoids present in the oil. It is globally known that the underlying pathology called anxiety influences worldwide as an antecedent of conflicting psychological and physical disorders, which are associated with various neuronal disorders. In this regard, the oil extracted from C. aurantium flowers shows a potential therapeutic application for the treatment of anxiety disorders. However, more studies are needed to elucidate its complete role on the CNS and to verify and prove its safety and efficacy profile. El acero esencial de C. aurantium ha sido ampliamente estudiado por su potencial acción ansiolítica neroli sobre varios receptores del Sistema Nervioso Central (SNC). Aunque presenta variaciones en su composición fitoquímica dependiendo de su origen, podemos destacar que muchos compuestos siguen presentes, como el linalol que demostró actividad antagonista sobre los receptores glutamatérgicos, posible acción inhibidora de los receptores de noradrenalina neroli serotonina, además de la capacidad de activar los receptores GABA en asociación con algunos flavonoides presentes en el aceite. Es mundialmente conocido que la patología subyacente llamada ansiedad influye en todo el mundo como antecedente de trastornos psicológicos neroli físicos conflictivos, que se asocian a diversas alteraciones neuronales. Por todo ello, el aceite extraído de las flores de C. aurantium muestra una potencial aplicación terapéutica para el tratamiento de los trastornos de ansiedad. Sin embargo, se necesitan más estudios para dilucidar todo su papel en el SNC para verificar i probar su perfil de seguridade i eficacia. O óleo essencial da C. aurantium tem sido amplamente estudado devido a seu potencial ação ansiolítico e sobre diversos receptores do Sistema Nervoso Central (SNC). Apesar de apresentar variações em sua composição fitoquímica a depender da sua origem, podemos destacar que muitos compostos se mantêm presentes, como o linalol que demostrou atividade antagônica sobre receptores glutamatérgicos, possível ação inibitória da receptação de noradrenalina e serotonina, além disso, capacidade ativar receptores GABA em associação com alguns flavonoides presente no óleo. É de conhecimento global que a patologia subjacente denominada como ansiedade, influi mundialmente como antecedente de conflitantes transtornos psicológicos e físicos, os quais estão associados a diversos distúrbios neuronais. Diante do exposto o óleo extraído das flores de C. aurantium demonstra um potencial aplicação terapêutica para o tratamento de transtornos de ansiedade. Entretanto, faz-se necessário mais estudos para a elucidação do seu papel completo sobre o SNC e para que seu perfil de segurança e eficácia, possam ser verificados e comprovados.
- Published
- 2021
26. Produção e qualidade do óleo essencial de menta em hidroponia com doses de potássio Production and quality of essential oil of mint under hydroponics with four potassium levels
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Tânea Maria Bisognin Garlet, Osmar Souza dos Santos, Sandro Luis Peter Medeiros, Paulo Augusto Manfron, Danton Camacho Garcia, Elis Borcioni, and Vinicius Fleig
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Mentha x gracilis ,Lamiaceae ,linalol ,óleo volátil ,linalool ,volatile oil ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
Este trabalho objetivou avaliar a produção de fitomassa de folhas, o teor e a qualidade do óleo essencial de Mentha x gracilis Sole, cultivada em quatro doses de potássio nas soluções hidropônicas (276, 414, 552 e 690mg L-1), no sistema "NFT" (Técnica do Fluxo Laminar de Nutrientes). Empregou-se delineamento experimental inteiramente casualizado, com cinco repetições. Estacas de plantas matrizes foram enraizadas em espuma fenólica, por 20 dias, em berçário, e, após isso, foram transferidas para bancadas de produção final. A colheita ocorreu aos 49 dias após o transplante. As folhas foram retiradas e pesadas para determinação da fitomassa fresca e aproveitadas para extração do óleo em aparelho de Clevenger. As análises de constituição química do óleo foram realizadas em Cromatógrafo Gasoso acoplado a Espectrômetro de Massa. As concentrações de K alteraram a produção de fitomassa fresca de folhas, o teor e a qualidade do óleo essencial. A dose máxima de K proporcionou aumento no teor do óleo essencial, porém reduziu a acumulação de fitomassa de folhas, diminuindo o rendimento do óleo por planta e a quantidade de linalol, o principal constituinte desse quimiotipo. A concentração de K sugerida para obtenção de maior rendimento da M. x gracilis, em cultivo hidropônico, não deve ultrapassar 276mg L-1 na solução nutritiva.This research was aimed at evaluating the production of leaves' phytomass, the content and quality of Mentha x gracilis Sole essential oil with four potassium (K) levels (276, 414, 552 e 690mg L-1) under hydroponics, on "NFT" system (Nutrient Film Technique). A completely randomized design was used with five replications. Stakes of matrix plants were rooted in phenolic foam for 20 days in a nursery, being then transferred to final production benches. Harvesting occurred at 49 days after transplanting. Leaves were separeted and weighted to determine fresch phytomass, and utilized for oil extraction in a Clevenger apparatus. The analyses of oil chemical constitution were performed in Gas Chromatography connected to a Mass Spectrometer. The K concentrations affected leaves fresh phytomass, content and quality of the essential oil. The K level maximum showed increase of essential oil yield, but decreased the fresch phytomass accumulation, decreasing the oil yield by plant and linalool quantity, the main constituent of this chemotype. The K concentration suggested for the greatest yield of M. x gracilis, under hydroponics, doesn't surpass 276mg L-1 in nutritive solution.
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- 2007
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27. Morphological alterations and time-kill studies of the essential oil from the leaves of Coriandrum sativum L. on Candida albicans.
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Sousa, Janiere P., Queiroz, Everton O., Guerra, Felipe Q. S., Mendes, Juliana M., Pedrosa, Zilmara V., Filho, Abrahão A. O., Pereira, Fillipe O., Trajano, Vinicius N., Souza, Fábio S., and Lima, Edeltrudes O.
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CORIANDER ,CANDIDA albicans ,LINALOOL ,ESSENTIAL oils ,GAS chromatography/Mass spectrometry (GC-MS) - Abstract
Copyright of Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas is the property of Universidad de Santiago de Chile and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2016
28. Walory smakowo-zapachowe niementolowych odmian mięt (Mentha Sp.).
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Kiełtyka-Dadasiewicz, Anna and Kubat-Sikorska, Aleksandra
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In the paper there are results of sensory and hedonistic evaluation in terms of taste and smell for water infusions of fresh leaves of mints. We analyzed 7 species and varieties of mints, grown in the soil, belonging to three chemotypes (carvon, linalool and menthol). The highest intensity of taste and smell obtained: peppermint M. × piperita L. (menthol chemotype) and M. spicata L. ‘Moroccan' (carvon chemotype). The least intense was the smell and taste of two carvon mints: curly (M. crispata L.) and M. rotundifolia Huds. The resulting sensory profiles illustrate the wide variation of mints for taste and smell. Similarity in terms of taste descriptors within individual chemotypes mints has been demonstrated. Most hedonistic acceptance was obtained for Moroccan mint, and the smallest for ginger mint (linalool chemotype). [ABSTRACT FROM AUTHOR]
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- 2016
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29. Basil conservation affected by cropping season, harvest time and storage period Armazenamento e conservação de manjericão após diferentes épocas e horários de colheita
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Franceli da Silva, Ricardo Henrique Silva Santos, Nélio José de Andrade, Luiz Cláudio Almeida Barbosa, Vicente Wagner Dias Casali, Renato Ribeiro de Lima, and Ricardo Vaz de Melo Passarinho
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Ocimum basilicum ,eugenol ,linalol ,clorofila ,fungos ,bactérias ,linalool ,chlorophyll ,mold ,yeast ,Agriculture (General) ,S1-972 - Abstract
Fresh basil (Ocimum basilicum L.) is used in food, phytotherapic industry, and in traditional therapeutic, due to its essential oil content and composition. Nevertheless basil can not be kept for long periods after harvest and its quality can be reduced. This work aimed to assess the influence of the season and harvest time in the postharvest conservation of basil stored for different periods. Basil was harvested at 8 am and 4 pm both in August/1999 and January/2000. Cuttings were conditioned in PVC packages and stored for 3, 6, and 9 days. During storage, chlorophyll content, essential oil content and composition were determined as well as microbiological analyses were carried out. Harvest season and the days of storage influenced the final content of essential oil. There was a linear decrease in the content of essential oil, in the chlorophyll content and in the number of mold and yeast colonies during storage. There was no effect of cropping season or harvest hour on essential oil composition, but the eugenol and linalool content increased during storage. Coliforms were under 0.3 MPN g-1 and the number of Staphylococcus aureus was under 1.0x10² UFC g-1.O manjericão (Ocimum basilicum L.) é empregado tanto na indústria culinária quanto fitoterápica e na medicina tradicional, devido ao teor e composição de seu óleo essencial. No entanto, o manjericão não pode ser conservado por longo período após a colheita e sua qualidade pode ser prejudicada. O objetivo deste trabalho foi verificar a influência da época e do horário de colheita sobre a conservação de manjericão armazenado por diferentes períodos. O manjericão foi colhido às 8h e às 16h em agosto/1999 e em janeiro/2000. Os ramos foram acondicionados em filmes de PVC e armazenados por 3, 6 e 9 dias. Durante o armazenamento, o teor de clorofila, e o teor e a composição do óleo essencial foram determinados e foram conduzidas análises microbiológicas. A época de colheita e os dias de armazenamento influenciaram o teor final de óleo essencial. Houve decréscimo linear dos teores de óleo essencial e de clorofila e do número de colônias de fungos e bactérias ao longo do armazenamento. Não houve efeito da época de colheita ou do horário de colheita sobre a composição do óleo essencial, mas os teores de eugenol e linalol aumentaram durante o armazenamento. O número de coliformes ficou abaixo de 0,3 NMP g-1 e o número de Staphylococcus aureus, abaixo de 1,0x10² UFC g-1.
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- 2005
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30. Caracteriza????o de plantios inequi??neos de Aniba rosodora Ducke em ??rea Sater?? Maw?? com fins de produtividade
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Santos, Paulo Vin??cius da Silva, Lima Junior, Manuel de Jesus Vieira, Krainovic, Pedro Medrado, Matos, Claudia de Queiroz Blai Gon??alves e, and Canalez, Geise de G??es
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??ndios Maw?? ,Ess??ncias e ??leos essenciais - Amaz??nia ,RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL: SILVICULTURA [CIENCIAS AGRARIAS] ,Sater??-Maw?? ,Linalol ,Florestas - Manejo ,Rosewood ,Amaz??nia ,Pau-rosa - Abstract
Submitted by Paulo Vin??cius da Silva Santos (pauloviniciusftal@gmail.com) on 2022-07-13T22:23:44Z No. of bitstreams: 2 Dissertacao_PauloVinicius.pdf: 2532495 bytes, checksum: e4c60f09633332907406889b8932761c (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 132630 bytes, checksum: ea1aaf41f74da3003b03cf5dcc5b7311 (MD5) Approved for entry into archive by PPGCIFA Ci??ncias Florestais e Ambientais (ppgcifa@ufam.edu.br) on 2022-07-14T20:18:00Z (GMT) No. of bitstreams: 2 Dissertacao_PauloVinicius.pdf: 2532495 bytes, checksum: e4c60f09633332907406889b8932761c (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 132630 bytes, checksum: ea1aaf41f74da3003b03cf5dcc5b7311 (MD5) Approved for entry into archive by PPGCIFA Ci??ncias Florestais e Ambientais (ppgcifa@ufam.edu.br) on 2022-07-14T20:18:00Z (GMT) No. of bitstreams: 2 Dissertacao_PauloVinicius.pdf: 2532495 bytes, checksum: e4c60f09633332907406889b8932761c (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 132630 bytes, checksum: ea1aaf41f74da3003b03cf5dcc5b7311 (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: 1. 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Deve-se inserir a Ficha conforme gerada automaticamente pelo sistema (N??o alterar formata????o e texto manualmente). on 2022-07-15T17:49:35Z (GMT) Submitted by Paulo Vin??cius da Silva Santos (pauloviniciusftal@gmail.com) on 2022-07-16T02:33:46Z No. of bitstreams: 2 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 132630 bytes, checksum: ea1aaf41f74da3003b03cf5dcc5b7311 (MD5) Dissertacao_PauloVinicius.pdf: 2657733 bytes, checksum: 534427ea412a9b04fd3a4d4d3d505ee8 (MD5) Approved for entry into archive by PPGCIFA Ci??ncias Florestais e Ambientais (ppgcifa@ufam.edu.br) on 2022-07-16T14:27:30Z (GMT) No. of bitstreams: 2 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 132630 bytes, checksum: ea1aaf41f74da3003b03cf5dcc5b7311 (MD5) Dissertacao_PauloVinicius.pdf: 2657733 bytes, checksum: 534427ea412a9b04fd3a4d4d3d505ee8 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2022-07-20T14:56:28Z (GMT) No. of bitstreams: 2 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 132630 bytes, checksum: ea1aaf41f74da3003b03cf5dcc5b7311 (MD5) Dissertacao_PauloVinicius.pdf: 2657733 bytes, checksum: 534427ea412a9b04fd3a4d4d3d505ee8 (MD5) Made available in DSpace on 2022-07-20T14:56:29Z (GMT). No. of bitstreams: 2 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 132630 bytes, checksum: ea1aaf41f74da3003b03cf5dcc5b7311 (MD5) Dissertacao_PauloVinicius.pdf: 2657733 bytes, checksum: 534427ea412a9b04fd3a4d4d3d505ee8 (MD5) Previous issue date: 2021-09-20 CNPq - Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico In order to stimulate the bioeconomy in the Amazon, this study aimed to create a scientific technical base for the bioeconomy of plantations in Aniba rosodora Ducke, in the Sater??-Maw?? indigenous area, in the State of Amazonas. The dendrometric characterization and quantification of the biomass of the plantations were studied, as well as the determination of the chemical composition and essential oil yield. We selected four productive areas of rosewood: Two plantations with 10 and 12 years old in Barreirinha, two in Mau??s with 5 and 9 years old and one plantation in Parintins with 21 years old. We carried out a 100% inventory (census) of uneven Rosewood plantations, followed by the collection in triplicate of leaves (sun and shade) and fine branches (sun and shade) for essential oil extraction and chemical analysis, totaling 60 (sixty ) Planting material manager. The essential oil yield was determined from the ratio between the dry mass weight of rosewood branches and leaves and the weight of oil extracted from this mass. The oil composition was provided by gas chromatography and an analysis of the generated chromatograms was made from the observation of linalool contents and minor constituents. The highest values in Total Height, DBH, Biomass and Increment in Biomass were from 21 years of planting, as was to be expected, given the time of growth in relation to younger plantings. However, when we observe the increment in Total Height and the increment in DBH, it is noteworthy that the Barreirinha plantations had a greater Increment in Total Height than the 21- year planting in the analyzed period. While for the increment in DAP, the smallest increment was for the 21-year planting, which can be explained by the death of some individuals, as well as by the stabilization of the vertical and horizontal planting growth. The differentiation in the chemical composition of essential Rosewood essentials occurred according to the municipality, between leaves and branches components. For the treatments, a partial overlap was observed between the sun and shade treatments for leaves and branches. The percentage in area of Linalool was shown to be a heterogeneous characteristic of the essential oil for the oldest plantations, not being observed for newer plantation. The average essential oil yield was higher in leaves (1.61%) than in fine twigs (1.45%) and there was no difference in essential oil yield for the treatments (sun and shade), showing that it is necessary to perform stratification of the tree copy to obtain the greatest adjustment of the essential oil. Para est??mulo a bioeconomia na Amaz??nia, o presente estudo teve como objetivo geral criar base t??cnica cient??fica para a bioeconomia de plantios de Aniba rosodora Ducke, na ??rea ind??gena Sater??-Maw??, no Estado do Amazonas. Foram estudadas a caracteriza????o dendrom??trica e quantifica????o da biomassa dos plantios, assim como a determina????o da composi????o qu??mica e rendimento de ??leo essencial da esp??cie. Selecionamos quatro ??reas produtivas de pau-rosa: Dois plantios com 10 e 12 anos de idade em Barreirinha, dois em Mau??s com 5 e 9 anos e um plantio em Parintins com 21 anos idade. Realizamos um invent??rio a 100% (censo) dos plantios inequi??neos de Pau-rosa, seguido da coleta em triplicata de amostras de folhas (sol e sombra) e galhos finos (sol e sombra) para extra????o de ??leo essencial e an??lise qu??mica, totalizando 60 (sessenta) amostras de material vegetativo. O rendimento em ??leo essencial foi determinado a partir da raz??o entre o peso de massa seca dos galhos e folhas de pau-rosa e do peso de ??leo extra??do dessa massa. A composi????o qu??mica do ??leo foi determinada atrav??s de cromatografia gasosa e a an??lise dos cromatogramas gerados, foi feita a partir da observa????o dos teores de linalol e dos constituintes minorit??rios. Os maiores valores em Altura Total, DAP, Biomassa e Incremento em Biomassa, foram do plantio de 21 anos, como era de se esperar, visto o tempo de crescimento em rela????o aos plantios mais jovens. No entanto, quando observamos o incremento em Altura Total e incremento em DAP, ?? destac??vel que os plantios de Barreirinha tiveram maior Incremento em Altura Total em rela????o ao plantio de 21 anos no per??odo analisado. Enquanto que para o Incremento em DAP, o menor incremento foi para o plantio de 21 anos, que pode ser explicado pela morte de alguns indiv??duos, assim como pela estabiliza????o do crescimento vertical e horizontal do plantio. A diferencia????o na composi????o qu??mica dos ??leos essenciais de Pau-rosa ocorreu de acordo com o munic??pio, entre componentes folhas e galhos. Para os tratamentos, foi observada uma sobreposi????o parcial entre os tratamentos de sol e sombra para folhas e galhos. A porcentagem em ??rea de Linalol apresentou-se ser uma caracter??stica heterog??nea do ??leo essencial para os plantios mais antigos, n??o sendo observado o mesmo para plantios xi mais novos. O rendimento m??dio de ??leo essencial foi maior em folhas (1,61%) do que em galhos finos (1,45%) e n??o foi observada diferen??a no rendimento de ??leo essencial para os tratamentos (sol e sombra), mostrando que n??o ?? necess??rio realizar a estratifica????o da copa da ??rvore para a obten????o de maiores rendimentos de ??leo essencial. N??o enfrentei dificuldades, achei bem intuitivo o passo a passo. A satisfa????o de poder ter tido essa oportunidade rica de trabalhar com uma esp??cie amea??ada de extin????o, de import??ncia ??mpar para a economia brasileira e principalmente da Amaz??nia no s??culo XX. Assim como desenvolver esse trabalho na ??rea ind??gena Sater??-Maw??.
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- 2021
31. Influência de solventes orgânicos na adsorção de linalol e decanal em sílica gel Influence of organic solvents on adsorption of linalool and decanal on silica gel
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Adriana Régia Cornélio, Fabiana Queiroz Ferrua, and Mário César Guerreiro
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adsorção ,solventes orgânicos ,linalol ,decanal ,d-limoneno ,adsorption ,organic solvents ,linalool ,d-limonene ,Agriculture (General) ,S1-972 - Abstract
Estudou-se a influência de solventes orgânicos (etanol, propanol e acetato de etila) na isoterma de adsorção de uma solução-modelo do óleo essencial de laranja em sílica-gel. A solução-modelo constituiu-se de compostos oxigenados (linalol e decanal) dissolvidos em d-limoneno (solvente). A influência da temperatura no processo de adsorção foi determinada para sistemas ternário (d-limoneno + linalol + decanal) à temperatura de 298,15 K. Para o composto oxigenado decanal, os solventes que mais influenciaram no processo de adsorção foram o etanol e o acetato de etila; já para o linalol, todos os solventes estudados tiveram influência sobre o processo.The influence of organic solvents (ethanol, propanol and ethyl acetate) on the isotherm of adsorption of model solutions of orange essential oil on silica gel was investigated. The model solution consisted of oxygenated compounds (linalool and decanal) dissolved in d-limoneno. The influence of temperature on the process of adsorption was determined by ternary systems (d-limoneno + linalool + decanal) at the temperature of 298,15 K . For the oxygenated compound decanal, the solvents that showed greater influence on the process of adsorption were ethanol and ethyl acetate, and for linalool all of the solvents studied were shown to influence the process.
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- 2004
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32. Estudos sintéticos para compostos com atividade antimalária e análogos a partir de terpenos
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Avanzi, Claudia de Jesus Aguiar, 1974, Baptistella, Lucia Helena Brito, 1955, Silva, Cleuza Conceição da, Almeida, Wanda Pereira, Universidade Estadual de Campinas. Instituto de Química, Programa de Pós-Graduação em Química, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Bisabolol ,Synthetic studies of terpenes ,Estudos sintéticos de terpenos ,Linalol ,Cicloeterificação ,Cycloetherification ,Linalool - Abstract
Orientador: Lúcia Helena Brito Baptistella Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Química Resumo: A natureza é uma rica fonte de moléculas estruturalmente diversas, capa-zes de exercer os mais variados efeitos biológicos, e por isso, de grande valor farmacológico, que têm inspirado a confecção de novas drogas não-naturais, potencialmente mais efetivas que as de origem. Num contexto mais amplo, o estudo visou a utilização de moléculas simples e abundantes na natureza, como os terpenos R-(-)-linalol (1) e a-(-)-bisabolol (2), para a síntese de outras mais elaboradas, como o acetato do (1S)-1-hidróxi-óxido de bisabolol A (3), sesquiterpeno com conhecida atividade antimalária, e de derivados análogos. Na maioria dos casos, a etapa principal seria o preparo de sistemas tetraidropiranos (THP's) 2,2,3,6,6-pentassubstituídos, idênticos ou análogos ao anel THP de 3, inicialmente utilizando reações de cicloeterificação da cadeia lateral hidroxílica ?,d-insaturada desses terpenos, ativada como um epóxido, sob catálise de ácidos de Lewis impedidos. Em estudos com o linalol R-(-)-1, os éteres cíclicos THP's foram obtidos em bons rendimentos e em alta regios-seletividade quando a epoxidação da olefina em posição ?,d em relação à hidroxila foi feita com reagente de Shi e a cicloeterificação dos álcoois bisho-moepóxidos com triflato de triisopropilsilil (TIPSOTf). Aplicada ao bisabolol (-)-a-2, em oposição às nossas expectativas, a metodologia não alcançou resul-tados satisfatórios, sendo verificada a formação de diversos produtos, principalmente derivados tetraidrofuranos (THF's), onde se observou o efeito do grupo volumoso p-mentânico de (-)-a-2 na seletividade para produtos de ciclização 5-exo-tet. Em menor extensão, comparativamente às reações do linalol, foi também possível a obtenção de anéis THP's do bisabolol com o uso de triflatos de silício impedidos na etapa de ciclização. Após estas constações, alguns métodos alternativos testados sobre (-)-a-2 foram conduzidos, visando o preparo estereosseletivo de intermediários epóxi-álcoois, mas não foram bem sucedidos, fato atribuido à baixa seletividade dos agentes oxidantes e/ou ineficiência de tamponamento, com ciclizações espontâneas para sistemas THF's. Uma série de outros produtos puderam ser isolados e identificados. Teste de oxidação alílica sobre o derivado THP de (-)-a-2 com o complexo CrO3/3,5-dimetilpirazol forneceu indícios de produto regioisomérico ao desejado. Paralelamente, de posse dos derivados THP's de R-(-)-1, estudos em reações de cicloadição [4+2] foram conduzidos, utilizando-os como dienófilos em presença de silil ceteno acetais conjugados como dienos. Infelizmente, tanto os estudos efetuados nesses casos quanto com outros dienos ricos em elétrons foram insuficientes para se chegar ao cicloadutos de Diels-Alder desejados. Alguns resultados permitiram sugestões, mas que ainda necessitam de melhor investigação. Adicionalmente, foram efetuadas análises biológicas de alguns dos com-postos sintetizados, sendo que dois deles exibiram promissora atividade de inibição de proteínas tirosina fosfatases (PTPs) Abstract: Nature is a rich source of structurally diverse molecules, able to exercise the most varied biological effects, and therefore of pharmacological value, which have inspired the design of new non-natural drugs, potentially more effective than those of origin. In a broader context, this investigation aimed at the use of simple molecules, abundant in nature, such as the terpenes R-(-)-linalool (1) and a-(-)-bisabolol (2), for the synthesis of other more elaborated, such as the (1S)-1-hydroxy-bisabolol oxide A acetate (3), a sesquiterpene with well-known antimalarial activity, and similar derivatives. In most cases, the key step was the preparation of the 2,2,3,6,6-pentasubstituted tetrahydropiran systems (THP's), identical or similar to the THP ring of 3, using regioselective cyclization reactions of the hydroxylic ?,d-unsaturated portion of these terpenes, activated as an epoxide and catalysed by hindered Lewis acids. THP's cyclic ethers from linalool R-(-)-1 were obtained in good yields and high regioselectivity when the ?,d-hydroxy olefin was submitted to the Shi epoxidation and cycloetherification of the corresponding bishomoepoxy alcohols with triisopropylsilyl triflate (TIPSOTf). Applied to the (-)-a-2, in contrast to our expectations, the methodology has not achieved satisfactory results, leading to several sesquiterpene analogues, with tetrahydrofuran derivatives (THF's) as major products, where it was recognized the effect of the bulky p-menthane group of (-)-a-2 on the selectivity for 5-exo-tet cyclization products. At small extention, when compared to linalool reactions, cyclization with sterically bulkier silyl triflates leads to desired THP's rings of bisabolol. Some alternative methods were also performed envisaging the preparation of hydroxy-epoxide intermediates from (-)-a-2 in a stereoselective manner, but they have not been successful, and it was attributed to low selectivity of the oxidizing agents and/or buffer inefficacy, leading to THF's systems by spontaneous cyclization reactions. A number of others products could be isolated and identified. Allylic oxidation essays on the THP derivatives of (-)-a-2 performed with CrO3/3,5-dimethylpyrazole complex provided evidences to afford a regioisomeric product of the expected one. At the same time, studies on [4+2] cycloaddition reactions with the THP's derivatives of R-(-)-1 were conducted, employing then as dienophiles in the presence of conjugated silyl ketene acetals as dienes. Unfortunately, all our efforts were not sufficient to provide the Diels-Alder cycloadducts, neither then other electron rich dienes were used. A better investigation of these cycloaddition reactions is still necessary. Additionally, biological enzymatic essays of two compounds obtained in this research project displayed promising inhibitory activity against protein tyrosine phosphatases (PTPs) Mestrado Química Orgânica Mestra em Química
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- 2021
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33. Seasonal variation in essential oil content and chemical profile of mint in southeast of Brazil
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Andreísa Flores Braga, Joyce Pereira Alvarenga, Fernanda Ventorim Pacheco, José Eduardo Brasil Pereira Pinto, Suzan Kelly Vilela Bertolucci, and Alexandre Alves de Carvalho
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0106 biological sciences ,linalool ,Harvest time ,Agriculture (General) ,menthol ,Biology ,01 natural sciences ,law.invention ,S1-972 ,chemistry.chemical_compound ,Mentha x piperita ,0404 agricultural biotechnology ,medicinal plant ,law ,Spring (hydrology) ,medicine ,Mentha viridis ,Chemical composition ,Essential oil ,mentol ,geography ,geography.geographical_feature_category ,General Veterinary ,planta medicinal ,Agriculture ,04 agricultural and veterinary sciences ,Seasonality ,linalol ,medicine.disease ,040401 food science ,Menthone ,Horticulture ,chemistry ,Animal Science and Zoology ,Menthol ,Agronomy and Crop Science ,010606 plant biology & botany - Abstract
This study evaluated the influence of seasonality in essential oil (EO) chemical composition of Mentha x piperita L. and Mentha viridis L. grown in southeast of Brazil. Leaves were collected from November 2011 until August 2013, in the middle of the following seasons: Spring (November), Summer (February), Autumn (May) and Winter (August). EO extraction was carried out by hydrodistillation in Clevenger apparatus for 1 hour. Chemical composition of EO was analyzed by GC-FID and GC-MS. The EO content and its chemical composition were influenced by seasonality in both species. The highest EO content was obtained for M. x piperita during spring (4.26%) and for M. viridis during spring (3.30%) and summer (3.70%). Mentha x piperita increased menthol (16.31 to 41.26%), neomenthol (3.02 to 6.39%) and menthone (5.56 to 41.58%) contents during spring and summer, respectively. Whereas, M. viridis EO content did not show a quality response pattern in relation to seasonality. Therefore, harvest time for M. x piperita is recommended during spring, and for M. viridis is recommended during spring and summer. RESUMO: O estudo teve como objetivo avaliar a influência da sazonalidade na composição química do óleo essencial (OE) de Mentha x piperita L. e Mentha viridis L. cultivadas no sudeste do Brasil. As folhas foram coletadas de novembro de 2011 até agosto de 2013, em meados das seguintes estações: primavera (novembro), verão (fevereiro), outono (maio) e inverno (agosto). A extração do OE foi realizada por hidrodestilação em aparelho de Clevenger por uma hora. A composição química do EO foi analisada por GC-FID and GC-MS. O teor de OE e sua composição química foram influenciados pela sazonalidade em ambas as espécies. O maior teor de OE foi obtido para M. x piperita na primavera (4,26%) e para M. viridis na primavera (3,30%) e verão (3,70%). Mentha x piperita aumentou o conteúdo de mentol (16,31 a 41,26%), neomentol (3,02 a 6,39%) e mentona (5,56 a 41,58%) durante a primavera e o verão, respectivamente. Já o conteúdo de OE de M. viridis não apresentou padrão de resposta de qualidade em relação à sazonalidade. Portanto, a colheita para M. x piperita é recomendada durante a primavera, e para M. viridis é recomendada durante a primavera e verão.
- Published
- 2021
34. Toxicity of essential oils and pure compounds of Lamiaceae species against Spodoptera frugiperda (Lepidoptera: Noctuidae) and their safety for the nontarget organism Trichogramma pretiosum (Hymenoptera: Trichogrammatidae).
- Author
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Bibiano, Camila Silva, Alves, Dejane Santos, Freire, Brenda Caroline, Vilela Bertolucci, Suzan Kelly, and Carvalho, Geraldo Andrade
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ESSENTIAL oils ,TRICHOGRAMMA ,TRICHOGRAMMATIDAE ,NOCTUIDAE ,HYMENOPTERA ,HELICOVERPA armigera ,FALL armyworm ,LEMNA minor - Abstract
The fall armyworm (FAW) Spodoptera frugiperda is a key pest of countless cultures of economic importance. FAW control is still mostly achieved by using synthetic chemicals and genetically modified plants, which can cause adverse effects on nontarget organisms. In this sense, secondary metabolites are an inexhaustible source of bioactive substances. Thus, this study investigated the insecticidal activity of essential oils (EOs) of plants of the Lamiaceae family against FAW. The EOs from Hyptis marrubioides (LD 50 = 18.49 μg/larvae) and Ocimum basilicum (LD 50 = 38.21 μg/larvae) were toxic to FAW in topical bioassays. The majority of compounds of H. marrubioides were identified as β-thujone (41.50%) and α-thujone (15.82%), while for O. basilicum , linalool (35.68%) and 1,8-cineole (16.03%) were the major substances. The pure compounds linalool (survival probability = 28.1%), α-thujone (survival probability = 24.5%) and 1,8-cineole (survival probability = 40.4%) were employed in a new bioassay; although all substances were toxic to FAW, the toxicity was less than that observed for EOs from H. marrubioides (survival probability = 9.5%) and O. basilicum (survival probability = 2.1%). These results suggest that there is more than one active substance in the EOs or else, there is synergism and/or an additive effect between the substances. With regard to the experiment conducted with the parasitoid Trichogramma pretiosum , the EOs from H. marrubioides and O. basilicum were classified as harmless according to the IOBC criteria, so they are safe for this parasitoid and have potential to be used in programs of integrated FAW pest management the natural enemy T. pretiosum. [Display omitted] • Essential oils from Hyptis marrubioides and Ocimum basilicum were toxic to FAW. • The pure compounds linalool, α-thujone and 1,8-cineole were toxic to S. frugiperda. • Essential oils were harmless to non target organism Trichogramma pretiosum. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
35. EL LINÁLOE (Bursera linanoe (La Llave) Rzedowski, Calderón & Medina), ESPECIE MADERABLE AMENAZADA: UNA ESTRATEGIA PARA SU CONSERVACIÓN.
- Author
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Arellano-Ostoa, G., González-Bernal, S., and Arellano-Hernández, G.
- Abstract
Copyright of Agro Productividad is the property of Colegio de Postgraduados and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2014
36. POMEN LINALOLA V PIVOVARSTVU.
- Author
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OCVIRK, Miha and KOŠIR, Iztok Jože
- Abstract
Linalool is a component of hop essential oil, which is attributed to a significant contribution to the typical flavor of hop essential oil and beer. Linalool contribution to the flavor of beer is dependent on the hop varieties used and way of hopping. Comparison of Slovenian hop varieties with other commercially important hop varieties shows that the concentration of linalool in the first, on average is higher. In order to achieve optimal linalool contribution to the final beer flavor, it is appropriate to add hops in wort in the final stages or as dry hopping during fermentation or maturation of beer. Post linalool aroma depends on the time of exposure to elevated temperatures, which lead to racemization and evaporation, and on the presence of yeast enzymes for degradation of linalool-containing glucosinolates. [ABSTRACT FROM AUTHOR]
- Published
- 2014
37. Prilagoditev postopkov določanja permeabilnosti sestavin eteričnih olj skozi kožo prašičjega uhlja in vitro
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Potočnik, Neja and Žakelj, Simon
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linalool ,gas chromatography ,surfactant ,menthol ,površinsko aktivna snov ,optimizacija postopkov za določanje permeabilnosti ,Essential oil ,optimization of procedures for permeability determination ,camphor ,Eterično olje ,plinska kromatografija ,linalyl acetate ,mentol ,kafra ,Franz diffusion cells ,linalol ,dermal absorption ,dermalna absorpcija ,linalil acetat ,Franzove difuzijske celice ,porcine ear skin ,limonene ,permeabilnost ,limonen ,permeability ,koža prašičjega uhlja - Abstract
Eterična olja in spojine iz njih so pogosto uporabljene sestavine kozmetičnih izdelkov. Imajo različne funkcije v kozmetiki, kot so odišavljanje izdelkov, antiseptično in antioksidantno delovanje. Poleg pomirjevalnega učinka so lahko nekatere spojine dražeče za kožo, zato nas je zanimalo, v kolikšni meri sestavine eteričnih olj lipofilne narave prehajajo skozi kožo, saj je penetracija skozi kožo zaradi njene raznolike strukture in barierne funkcije vprašljiva. Cilj diplomske naloge je bil ovrednotiti prehod spojin iz eteričnih olj skozi kožno bariero. Ključnega pomena je bila optimizacija nekaterih postopkov pri in vitro poskusu s Franzovimi difuzijskimi celicami, s pomočjo katerega smo posnemali prehod preiskovanih spojin skozi kožo in pri pripravi vzorcev za analizo s plinskim kromatografom (GC-FID). V raziskavi smo uporabili sistem Franzovih difuzijskih celic, pri katerem smo potrebovali zamrznjeno kožo prašičjega uhlja, ki je služila kot človeški koži najbolj podobna membrana za zagotavljanje barierne funkcije kože, Miglyol 812 kot topilo za spojine iz eteričnih olj in izotonični fosfatni pufer z dodatki različnih površinsko aktivnih snovi, ki so omogočale prehod iz lipofilne donorske raztopine v hidrofilni akceptorski medij. Vzorce smo v roku 24 ur vzorčili v enajstih časovnih točkah in smo jih po koncu poskusa s pomočjo ekstrakcije v medij za analizo z GC in koncentriranjem vzorcev v vakuumu pripravili za analizo s plinskim kromatografom. Ugotovili smo, katere površinsko aktivne snovi in v kakšnih koncentracijah delujejo najbolj optimalno kot dodatek k fosfatnemu pufru, da spojine iz eteričnih olj prehajajo kožno bariero in se raztapljajo v akceptorskem mediju. Po analizi z GC-FID smo ugotovili, da so koncentracije v vzorcih izjemno nizke, zato bi bilo v prihodnosti potrebno razviti postopke priprave vzorcev, povišati koncentracijo preiskovanih spojin v donorskem delu in izbrati občutljivejše metode analize. Essential oils and their components are often used in cosmetic products. They have different functions in cosmetic products as they are added for their antiseptical and antioxidant effects as well as perfumes. Although they often have soothing effect on skin some of the essential oil components can be irritating on skin. This is why we were interested in evaluating permeability of lipophilic components from essential oils through skin because of it's diverse structure which presents natural physical barrier for human body. Our goal was to evaluate permeability of essential oil components through skin barrier. The key task of our work was to optimize some of the procedures in in vitro testing with Franz diffusion cells. With this experiment we imitated transition of essential oil components through skin substitute and we optimized some of the procedures for preparing samples from experiment to be suitable for further analysis with Gas chromatography. During our work we used system of Franz diffusion cells which required frozen porcine ear skin as it was the most suitable and similar substitute for human skin. We also used Miglyol 812 as solvent for essential oil components and isotonic phosphate-buffered saline with addition of different surfactants which enabled transition of lipophilic components from donor solution to hydrophilic acceptor medium. We took 11 paralel samples at 11 different time points during experiment that lasted for 24 hours. Then we extracted samples in GC analysis medium and concetrated samples in vacuum for GC analysis. We determined which surfactants and what concentrations of them are the most optimal for use as addition to phosphate-buffered saline to enable essential oil components penetrate skin barrier and dissolve in acceptor medium. After GC-FID analysis we realized that concentrations in samples were too low, which brings us to optimizing procedures in sample preparation in the future, increase concetration of essential oil components in donor solution or use more sensitive methods of analysis.
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- 2020
38. Biomass production, yield and chemical composition of essential oil from Lippia alba (mill.) N. E. Br. ex Britton & P. Wilson, in different irrigation blades
- Author
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Solano Mendoza, Juan David [UNESP], Universidade Estadual Paulista (Unesp), Mayo Marques, Márcia Ortiz [UNESP], and Saad, João Carlos Cury
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Linalol ,Déficit hídrico ,Óleo essencial ,Abiotic factors ,Fatores abióticos ,Water deficit ,Essential oil ,Linalool ,Lippia alba - Abstract
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No. of bitstreams: 1 sonalo mendoza_jd_dr_botfca_par.pdf: 917169 bytes, checksum: f8f2f2321025f84c7ec8ed8977b21d80 (MD5) Previous issue date: 2020-03-06 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) A Lippia alba (Verbenaceae), popularmente conhecida como erva-cidreira, é uma planta originaria da América do Sul e considerada um recurso genético vegetal de altíssimo valor para estudos de bioprospecção pela sua potencial importância econômica, ecológica e propriedades do seu óleo essencial. A irrigação de sistemas de produção agrícola depende da disponibilidade dos recursos hídricos da demanda de água em cada etapa do cultivo, requerendo um manejo criterioso e sustentável. Estudos em plantas aromáticas têm mostrado que o manejo da água por meio da irrigação e as condições climáticas do local de cultivo são fatores abióticos determinantes na produção de biomassa, rendimento de óleo essencial e síntese de princípios ativos de interesse para a indústria de cosméticos, perfumes e fragrâncias. O objetivo deste estudo foi avaliar o efeito de diferentes lâminas de irrigação na biomassa, rendimento, produção e composição química do óleo essencial da espécie Lippia alba, de clones selecionados de quimiotipo linalol, pertencentes ao Banco de Germoplasma do Instituto Agronômico (IAC). As mudas foram obtidas por propagação assexuada e o cultivo conduzido em casa de vegetação em sistema orgânico de produção. Os tratamentos foram representados pelo manejo da irrigação com base na evapotranspiração de referência (50%, 75%, 100% ET0 e 125% da ET0). Os cortes foram efetuados aos 90, 180, 270 e 360 dias após a poda de formação (DAPF). As plantas foram avaliadas quanto à produção total de matéria seca das folhas (PTMSF), produção total de matéria seca dos caules (PTMSC), produção total de matéria seca da parte aérea (PTMSPA), rendimento das folhas (RDF), rendimento do óleo essencial (ROE), produção do óleo essencial por planta (POE) e composição química do óleo essencial das folhas. Os resultados foram submetidos à análise de variância, complementada pelo teste de Scott-Knott, a 5% de probabilidade. A análise multivariada foi aplicada aos resultados de composição química dos óleos essenciais. Houve acréscimo nas características agronômicas (PTMSF, PTMSC, PTMSPA, RDF, ROE e POE) em função das lâminas de irrigação. No segundo e terceiro cortes foram observados os maiores valores de PTMSF, obtidos com as lâminas de irrigação de 100% da ET0 e de 125% da ET0, respectivamente. Os maiores valores de PTMSC e PTMSPA foram observados no segundo e terceiro cortes com a lâmina de irrigação de 125% da ET0. Os maiores valores de RDF foram observados no terceiro e quarto cortes com a lâmina de irrigação de 50% da ET0. O segundo e quarto cortes apresentaram os maiores valores de ROE (1,02% e 1,03%) com a lâmina de irrigação de 75% da ET0. Foram observados os maiores valores de POE no segundo corte (0,14 g. pl-¹) e terceiro corte (0,13 g. pl-¹) com as lâminas de irrigação de 100% da ET0. e 125% da ET0, respectivamente. Os compostos majoritários nos óleos essenciais foram o linalol, 1,8 cineol, germacreno D, β-elemeno e geranial, representando 87,20% do total de constituintes detectados no primeiro corte, 88,17% no segundo corte, 92,25% no terceiro corte e 92,98% no quarto corte. Diferenças quantitativas e acréscimos nas proporções relativas médias das substȃncias em função das lȃminas de irrigação (% da ET0) foram verificadas, no primeiro corte, para o linalol (100% da ET0), geranial, β-elemeno e germacreno D (50% da ET0). No segundo corte, para o linalol (50% da ET0), geranial, β-elemeno e germacreno D (100% da ET0). No terceiro corte, para o linalol (50% da ET0), geranial e β-elemeno (100% da ET0) e do germacreno D (125 % da ET0). No quarto corte, para o linalol e geranial (100% da ET0) e para β-elemeno e germacreno D (75% da ET0). As maiores proporções relativas do linalol foram obtidas no quarto corte (84,8%) e no terceiro corte (83,4%) com as lâminas de irrigação de 100% e 50% da ET0, respectivamente. Lippia alba (Verbenaceae), popularly known as lemon balm, is a plant originally from South America and considered a highly valuable plant genetic resource for bioprospecting studies due to its potential economic, ecological and essential oil properties. The irrigation of agricultural production systems depends on the availability of water resources for water demand at each stage of cultivation, requiring careful and sustainable management. Studies on aromatic plants have shown that water management through irrigation and the climatic conditions of the place of cultivation are abiotic factors determining biomass production, essential oil yield and synthesis of active principles of interest to the cosmetics, perfumes industry and fragrances. The objective of this study was to evaluate the effect of different irrigation depths on biomass, yield, production and chemical composition of the essential oil of the species Lippia alba, from selected clones of the linalool chemotype, belonging to the Germplasm Bank of the Agronomic Institute (IAC). The seedlings were obtained by asexual propagation and cultivation was carried out in a greenhouse in an organic production system. The treatments were represented by irrigation management based on reference evapotranspiration (50%, 75%, 100% ET0 and 125% ET0). The cuts were made at 90, 180, 270 and 360 days after the formation pruning (DAPF). Plants were evaluated for total leaf dry matter production (PTMSF), total stem dry matter production (PTMSC), total shoot dry matter production (PTMSPA), leaf yield (RDF), oil yield essential oil (ROE), production of essential oil per plant (POE) and chemical composition of leaf essential oil. The results were submitted to analysis of variance, complemented by the Scott-Knott test, at 5% probability. Multivariate analysis was applied to the results of chemical composition of essential oils. There was an increase in agronomic characteristics (PTMSF, PTMSC, PTMSPA, RDF, ROE and POE) due to the irrigation depths. In the second and third cuts, the highest values of PTMSF were observed, obtained with the irrigation depths of 100% ET0 and 125% ET0, respectively. The highest values of PTMSC and PTMSPA were observed in the second and third cuts with the irrigation blade of 125% of ET0. The highest values of RDF were observed in the third and fourth cuts with the 50% ET0 irrigation blade. The second and fourth cuts showed the highest ROE values (1.02% and 1.03%) with the 75% ET0 irrigation depth. The highest POE values were observed in the second cut (0,14 g. pl-¹) and third cut (0,13 g. pl-¹) with the 100% ET0 irrigation blades. and 125% of ET0, respectively. The major compounds in essential oils were linalool, 1.8 cineole, germacrene D, β- elemene and geranial, representing 87.20% of the total constituents detected in the first cut, 88.17% in the second cut, 92.25% in the third cut and 92.98% in the fourth cut. Quantitative differences and additions in the average relative proportions of the substances as a function of the irrigation depths (% of ET0) were verified, in the first cut, for linalool (100% of ET0), geranial, β-elenene and germacrene D (50% of ET0). In the second cut, for linalool (50% of ET0), geranial, β-elemene and germacrene D (100% of ET0). In the third cut, for linalool (50% of ET0), geranial and β-elemene (100% of ET0) and germacrene D (125% of ET0). In the fourth cut, for linalool and geranial (100% of ET0) and for β-elemene and germacrene D (75% of ET0). The largest relative proportions of linalool were obtained in the fourth cut (84.8%) and in the third cut (83.4%) with the irrigation depths of 100% and 50% of ET0, respectively. 001
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- 2020
39. Volatile compounds as sedative, anesthetic and antinocioceptive in fish
- Author
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Rodrigues, Patricia, Heinzmann, Berta Maria, Baldisserotto, Bernardo, Ourique, Aline Ferreira, and Barcellos, Leonardo Jose Gil
- Subjects
Nanoemulsion ,CIENCIAS BIOLOGICAS::FARMACOLOGIA [CNPQ] ,Linalol ,Rhamdia quelen ,Óleo essencial ,Oreochromis niloticus ,Nanoemulsão ,Nectandra grandiflora ,Essential oil ,Linalool - Abstract
Natural products are a drug discovery source for both humans and veterinary treatment. Consequently, in the last decade, essential oils have been researched as fish anesthetics and sedatives, however, there are a small number of antinociceptive drug development studies using fish as an animal model. Also, the essential oils use is limited in pisciculture maybe due to the physicochemical limitations, such as high hydrophobicity. Thus, nanotechnology can protect and facilitate these compounds dispersion in water. Therefore, through this dissertation, it is expected to improve the volatile compounds use as anesthetic and sedative agents, even as increase the antinociceptive use as well-being promoters for fish. Firstly, silver catfish (Rhamdia quelen) nociceptive method was standardized with acetic acid 15 % (3μL), formalin 1 % (10 μL) and menthol 0.5 % (1 μL) administered in the lips. Additionally, due to the Nectandra grandiflora essential oil anesthetic/sedative activity, it was suggested to evaluate the antinociceptive activity, as well as linalool. In addition, we developed a N. grandiflora essential oil nanoemulsion formulation (NEN), and evaluate the anesthetic, sedative and toxicity by immersion bath in Nile tilapia (Oreochromis niloticus) compared with the free essential oil (FEO). Chemical analyses were performed by gas chromatography coupled to mass spectrometry and flame ionization detector. Among the results, to induce the nociceptive-like behavior in silver catfish we used 15 % acetic acid (3 μL), 1 % formalin (10 μL) and 0.5 % menthol (1 μL). Nociceptive-like behavior was verified in ten locomotor parameters that were reversed with intramuscular morphine (5 mg/kg) injection, and this antinociceptive activity was antagonized by naloxone (5 mg/kg). However, only acetic acid-induced the nociceptive-like behavior at the maximum speed parameter. Given this, the volatile compounds treatment was performed only against acetic acid and the N. grandiflora essential oil (10 mg/kg) had low activity. Linalool (50 mg/kg), on the other hand, has strong antinociceptive activity by reversing all locomotors parameters, with a related mechanism to opioid receptors. Secondarily, through the spontaneous emulsification process, we developed thirteen NEN and the nanoemulsification process protected the oil chemical composition for 60 days and reduced the FEO side effects. Therefore, the NEN 100 mg/L concentration for anesthetic and 30 mg/L for sedation application are safe. Thus, FEO depressant activity was improved and also refined for tilapia. Moreover, the two fish species use covers not only nociceptive-like behavior in an unknown species but also a new O. niloticus pharmacological alternative for sedation and anesthesia. Consequently, the silver catfish new nociception experimental model proposed demonstrated specificity, since the nociceptive-like behavior was reverted by linalool and morphine, which have described analgesic activity. Briefly, this dissertation contributes to research that aims to combine volatile compound and nanotechnological knowledge into an effective and safe anesthetic drug development. Produtos naturais representam uma fonte de novos medicamentos, na última década, óleos essenciais vêm sendo investigados como anestésicos e sedativos para peixes. Entretanto o desenvolvimento de antinociceptivos é pouco estudado, assim como a utilização de peixes como modelo animal. Ainda, os óleos essenciais são pouco utilizados na prática como anestésicos para peixes e isso pode estar ligado às suas limitações físico-químicas. Neste sentido, a nanotecnologia pode ser utilizada para proteger e facilitar a dispersão em água destes compostos. Logo, objetivamos aprimorar o uso de compostos voláteis como agentes anestésicos e sedativos e antinociceptivos como promotores de bem-estar em peixes. Para isso, padronizamos um método nociceptivo com o jundiá (Rhamdia quelen) com três diferentes algógenos, ácido acético 15 % (3μL), formalina 1 % (10 μL) e mentol 0,5 % (1 μL). Adicionalmente, devido a atividade anestésica/sedativa do óleo essencial de Nectandra grandiflora, foi proposta a avaliação da atividade antinociceptiva, assim como do linalol. Além disso, desenvolvemos uma formulação de nanoemulsão com este óleo essencial e avaliação da atividade anestésica e sedativa por banho de imersão, assim como sua toxicidade em tilápia do Nilo (Oreochromis niloticus). As análises químicas foram realizadas por cromatógrafo gasoso acoplado a espectrometria de massas e detector de ionização em chama. O comportamento tipo-nociceptivo do jundiá foi verificado em dez parâmetros locomotores e revertido com morfina (5 mg/kg) e antagonizado pelo pré-tratamento com naloxona (5 mg/kg). Entretanto, apenas o ácido acético induziu o comportamento tipo-nociceptivo no parâmetro de velocidade máxima. Diante disto, realizamos o tratamento dos peixes com os compostos voláteis apenas frente a ao ácido como algógeno e verificamos a fraca atividade do óleo essencial (10 mg/kg). O linalol (50 mg/kg) apresentou forte atividade antinociceptiva ao reverter todos os parâmetros de atividade locomotora, com mecanismo da atividade ligado aos receptores opioides. Em um segundo momento, através do processo de emulsificação espontânea desenvolvemos uma formulação com o óleo essencial de N. grandiflora que protegeu e diminuiu os efeitos adversos, sendo seguras a concentração de 100 mg/L como anestésico e 30 mg/L para sedação de tilápias. A utilização de duas espécies de peixes abrange não só o comportamento tipo-nocioceptivo outrora desconhecido em Rhamdia quelen, mas também uma nova alternativa farmacológica para sedação e anestesia de O. niloticus. Desta forma, o novo modelo experimental proposto para nocicepção com jundiá demonstrou especificidade, já que foi possível observar a reversão do comportamento tipo-nociceptivo para o linalol e a morfina, que possuem atividade analgésica descrita. Em suma esta dissertação colabora para pesquisas que visam aliar o conhecimento nanotecnológico com compostos voláteis no desenvolvimento de medicamentos anestésicos mais eficazes e com menores efeitos adversos.
- Published
- 2020
40. Análise Térmica do Óleo Essencial de Aniba rosaeodora Ducke por TG e DSC
- Author
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Rogério de Mesquita Teles and Victor Elias Mouchrek Filho
- Subjects
Aceite esencial ,Aniba duckei Kostermans ,Aniba rosaeodora Ducke ,Linalol ,Óleo essencial ,Análise térmica ,General Earth and Planetary Sciences ,Thermal analysis ,Análisis térmico ,Essential oil ,Linalool ,General Environmental Science - Abstract
Thermal analysis comprises a group of techniques to measure a physical property of a sample subjected to controlled temperature programming, including thermogravimetry (TGA), derivative thermogravimetry (DTG) and differential scanning calorimetry (DSC). The species Aniba duckei Kostermans, synonymous with Aniba rosaeodora Ducke, occurs in the Amazon and is also known as rosewood. Essential oils are complex oily aromatic liquids obtained by extraction from highly volatile aromatic plant materials as secondary metabolites. This research aimed to chemically and thermally characterize the essential oil of Aniba duckei. Gas chromatography was used for the quantification, by the external standard method, of the main component. The thermal study of the oil and the linalool standard was carried out using DSC and TG-DTG. The essential oil yield was 1.93% and the analysis by GC-MS confirmed the majority presence of linalool, with a concentration of 89.34% in the oil. The technical analysis revealed some similarity between the curves of pure linalool and essential oil, which is attributed to the high content of linalool in the oil. The differences between the boiling points and enthalpies of the linalool and oil pattern are justified by the presence of minor components, their concentrations in the oil and because they are substances of different polarities, molecular masses and intermolecular forces. The techniques proved to be efficient to characterize the oil. The results of the thermal analysis of the essential oil of the Aniba rosaeodora plant species are unprecedented, enabling the determination of linalool in by DSC. El análisis térmico comprende un grupo de técnicas para medir una propiedad física de una muestra sujeta a programación de temperatura controlada, que incluye termogravimetría (TGA), termogravimetría derivada (DTG) y calorimetría diferencial de barrido (DSC). La especie Aniba duckei Kostermans, sinónimo de Aniba rosaeodora Ducke, se encuentra en el Amazonas y también se conoce como palo de rosa. Los aceites esenciales son líquidos aromáticos aceitosos complejos obtenidos por extracción de materiales vegetales aromáticos altamente volátiles como metabolitos secundarios. Esta investigación tuvo como objetivo caracterizar química y térmicamente el aceite esencial de Aniba duckei. Se utilizó cromatografía de gases para la cuantificación, por el método del patrón externo, del componente principal. El estudio térmico del aceite y del estándar de linalol se realizó mediante DSC y TG-DTG. El rendimiento de aceite esencial fue de 1,93% y el análisis por GC-MS confirmó la presencia mayoritaria de linalol, con una concentración de 89,34% en el aceite. El análisis técnico reveló cierta similitud entre las curvas del linalol puro y el aceite esencial, lo que se atribuye al alto contenido de linalol en el aceite. Las diferencias entre los puntos de ebullición y las entalpías del patrón del linalol y del aceite se justifican por la presencia de componentes minoritarios, sus concentraciones en el aceite y por tratarse de sustancias de diferente polaridad, masa molecular y fuerzas intermoleculares. Las técnicas demostraron ser eficientes para caracterizar el aceite. Los resultados del análisis térmico del aceite esencial de la especie vegetal Aniba rosaeodora no tienen precedentes, permitiendo la determinación de linalool por DSC. A análise térmica compreende um conjunto de técnicas para medir uma propriedade física de amostra submetida a programação de temperatura controlada, incluindo termogravimetria (TGA), termogravimetria derivada (DTG) e calorimetria exploratória diferencial (DSC). A espécie Aniba duckei Kostermans, sinonímia de Aniba rosaeodora Ducke, ocorre na Amazônia e é também conhecida como pau-rosa. Os óleos essenciais são líquidos aromáticos oleosos complexos obtidos por extração de materiais vegetais aromáticos altamente voláteis, como metabólitos secundários. Esta pesquisa teve como objetivo caracterizar química e termicamente o óleo essencial de Aniba duckei. A cromatografia gasosa foi utilizada para identificação e quantificação do componente principal, pelo método de padrão externo. O estudo térmico do óleo e do padrão linalol foi realizado utilizando DSC e TG-DTG. O rendimento de óleo essencial foi de 1,93% e a análise por GC-MS confirmou a presença majoritária de linalol, com concentração de 89,34% no óleo. A análise técnica revelou semelhança entre as curvas de linalol puro e as do óleo essencial, o que é atribuído ao alto teor de linalol no óleo. As diferenças entre os pontos de ebulição e entalpias do padrão do linalol e do óleo são justificadas pela presença de componentes minoritários, suas concentrações no óleo e por serem substâncias de diferentes polaridades, massas moleculares e forças intermoleculares. As técnicas se mostraram eficientes para caracterizar o óleo. Os resultados da análise térmica do óleo essencial da espécie vegetal Aniba rosaeodora são inéditos, possibilitando a determinação do linalol por DSC.
- Published
- 2022
- Full Text
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41. Enantiomeric differentiation of three key volatile compounds in three different palm wines (Elaeis guineensis, Borassus flabellifer and Nypa fruticans)
- Author
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Ola Lasekan
- Subjects
0106 biological sciences ,linalool ,General Chemical Engineering ,Nypa fruticans ,lcsh:TX341-641 ,Elaeis guineensis ,01 natural sciences ,phenylethanol ,Industrial and Manufacturing Engineering ,chemistry.chemical_compound ,Linalool ,010608 biotechnology ,Botany ,Food science ,Wine ,linalol ,acetoin ,enantiomer differentiation ,Vino de palma ,Palm wine ,diferenciación enantiomérica ,feniletanol ,acetoína ,biology ,lcsh:TP368-456 ,Chemistry ,Acetoin ,010401 analytical chemistry ,General Chemistry ,biology.organism_classification ,Borassus ,0104 chemical sciences ,lcsh:Food processing and manufacture ,Enantiomer ,Palm ,lcsh:Nutrition. Foods and food supply ,Food Science - Abstract
The contents and enantiomeric distributions of three chiral compounds, linalool, phenylethanol and acetoin, were investigated in three different palm wines (i.e. Elaeis guineensis, Borassus flabellifer, and Nypa fruticans). While N. fruticans and B. flabellifer wines were predominated with the (S)-enantiomers of linalool, phenylethanol and acetoin, respectively, E. guineensis wine contained acetoin primarily as (R)-enantiomers in addition to the (S)-forms of linalool and phenylethanol. Interestingly, results revealed a high level of acetoin in all wines with concentrations ranging from 2437 to 6611 µg/L and an average ratio of S/R of 4:96–100:0. Moreover, noticeable differences occurred in the enantiomeric ratios and concentrations of enantiomers of the chiral compounds during storage. In all the wines, concentration of the (S)-form decreased during storage, whereas those of the (R)-form increased. En este estudio se investigaron los contenidos y las distribuciones enantioméricas de tres compuestos quirales (linalol, feniletanol y acetoína) en tres vinos de palma distintos (Elaeis guineensis, Borassus flabellifer y Nypa fruticans). Mientras que los (S)-enantiómeros de linalol, feniletanol y acetoína predominan en los vinos N. fruticans y B. flabellifer, el vino E. guineensis contiene principalmente acetoína como (R)-enantiómeros, además de las formas (S) de linalol y feniletanol. Los resultados dan cuenta de la presencia de un elevado nivel de acetoína en todos los vinos, comprobándose que sus concentraciones oscilan en un rango de 2437 a 6611 µg/L y una ratio promedio de S/R de 4:96 a 100:0. Por otra parte, se constató que durante su almacenamiento se presentaron diferencias notables en las ratios enantioméricas y las concentraciones de enantiómeros de los compuestos quirales. En todos los vinos disminuyó la concentración de la forma (S), aumentando la de la forma (R).
- Published
- 2018
42. The Mexican roots of the Indian Lavender Tree.
- Author
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Becerra, Judith X. and Noge, Koji
- Subjects
- *
LAVENDERS , *ESSENTIAL oils , *ANALYTICAL chemistry , *PHYLOGENY , *CLASSIFICATION - Abstract
The tree known as Indian lavender (Bursera delpechiana, Burseraceae) is a source of linalool. It was introduced to India from Mexico at the beginning of the 20th century for the exploitation of its essential oil. Its origin from Mexico was not well understood because the name B. delpechiana has been taxonomically obsolete for many years. We used molecular, phylogenetic, and chemical data to determine which currently recognized species it belongs to. This evidence regarding the Indian Lavender Tree's identity all points to the Mexican species, Bursera linanoe. Our chemical analysis also revealed that linalyl acetate is the primary constituent of Indian Lavender oil as well as of Mexican B. linanoe rather than linalool as previously believed. [ABSTRACT FROM AUTHOR]
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- 2010
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43. Protective effects of d-limonene and linalool on female rats intoxicated with 7,12 dime-thylbenz(a)anthracene (DMBA).
- Author
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TANYILDIZI, S., SERVI, K., and CIFTCI, O.
- Abstract
The article discusses a study which investigated the potential antioxidant effects of 2 monoterpenes, linalool and d-limonene, in female rats treated or not with dimethylbenz(a)anthracene (DMBA). Monoterpenes refer to dietary components found in the oils of citrus oil and edible plants. Results revealed that malondialdehyde (MDA) was increased by DMBA treatment alone. However, significant decreases of MDA formation was induced by the dietary monoterpene supplementation. In addition, linalool seemed to be a more potent antioxidant than limonene. The findings also showed the protective effects of monoterpenes on an induced oxidative stress.
- Published
- 2009
44. Characterization of the leaf essential oil from laurel (Laurus nobilis L.) grown in Colombia.
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Quijano, Clara Elizabeth and Pino, Jorge A.
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- *
LAUREL , *LAURUS nobilis , *COMPOSITION of leaves , *ESSENTIAL oils , *FOLIAR diagnosis - Abstract
Laurel (Laurus nobilis L.) is an evergreen tree cultivated in many warm regions of the world, particularly in the Mediterranean countries. The dried leaves and their steam distilled oil possess a spicy flavor and are extensively used in flavoring many food products. The essential oil was obtained from 200 g of leaves by hydrodistillation for 3 h in a Clevengertype apparatus, yielding 0.2 %. The chemical composition of leaf oil from laurel grown in Colombia was studied by GC-MS using a HP-5MS fused silica column. In total, one hundred and twelve volatile compounds, representing 95 % of the total composition, were identified in the leaf oil. Of them, 47 are reported for the first time in laurel. It is interesting to note the presence of many aromatic esters which were not found in previous papers. The most abundant components found in the leaf oil were 1,8-cineole (22.0 %), linalool (16.4 %), α-terpinyl acetate (11.1 %) and β-caryophyllene (9.0 %). The Colombian laurel oil has some similarities with the composition of other laurel oils and could be used as a substitute of those imported. [ABSTRACT FROM AUTHOR]
- Published
- 2007
45. Impact of alfalfa mosaic virus subgroup I and II isolates on terpene secondary metabolism of Lavandula vera D.C., Lavandula×alardii and eight cultivars of L. hybrida Rev.
- Author
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Bruni, Renato, Bellardi, Maria Grazia, Parrella, Giuseppe, and Bianchi, Alberto
- Subjects
- *
LAVENDERS , *PLANT diseases , *PLANT shoots , *CULTIVARS - Abstract
Abstract: Lavandula vera D.C., Lavandula×alardii and eight different L. hybrida Rev. cultivars cultivated at the Herb Garden of Casola Valsenio (Italy), found naturally infected by Alfalfa mosaic virus (AMV), have been evaluated for the influence of their pathologic status on essential oil biosynthesis and quality. The viral disease, consisting of a “yellow mosaic” on leaves and stems, was identified by means of electron microscopy, RT-PCR-RFLP and PAS-ELISA assays. Molecular characterization of the coat protein gene of four AMV isolates suggested that three of them belonged to subgroup I (from cvs. Ordinario and Grosso, Lavandula×alardii), while the isolate from cv. Sumiens showed molecular features of subgroup II. The infection of Lavandula plants by AMV (of the two subgroups) was found to decrease essential oil secretion. Changes in the relative composition regarded the linalool-linalyl acetate ratio; the overall increase in terpenic esters and in some cases increased sesquiterpenic abundance. Infection caused by AMV subgroup II isolate influenced negatively the quality of the essential oil much more than AMV isolates belonging to subgroup I. The importance of the phytopathological status of essential oil bearing crops is outlined. [Copyright &y& Elsevier]
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- 2006
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46. Altered growth and polyamine catabolism following exposure of the chocolate spot pathogen Botrytis fabae to the essential oil of Ocimum basilicum.
- Author
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Oxenham, Senga K., Svoboda, Katja P., and Walters, Dale R.
- Subjects
- *
FUNGI , *BOTRYTIS , *BASIL , *ENZYMES , *ADENOSYLMETHIONINE , *OXIDASES , *CELL death - Abstract
Biomass of the fungal pathogen Botrytis fabae in liquid culture amended with two chemotypes of the essential oil of basil, Ocimum basilicum, was reduced significantly at concentrations of 50 ppm or less. The methyl chavicol chemotype oil increased the activity of the polyamine biosynthetic enzyme S-adenosylmethionine decarboxylase (AdoMetDC), but polyamine concentrations were not significantly altered. In contrast, the linalol chemotype oil decreased AdoMetDC activity in B. fabae, although again polyamine concentrations were not altered significantly. However activities of the polyamine catabolic enzymes diamine oxidase (DAO) and polyamine oxidase (PAO) were increased significantly in B. fabae grown in the presence of the essential oil of the two chemotypes. It is suggested that the elevated activities of DAO and PAO may be responsible, in part, for the antifungal effects of the basil oil, possibly via the generation of hydrogen peroxide and the subsequent triggering of programmed cell death. [ABSTRACT FROM AUTHOR]
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- 2005
- Full Text
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47. Induced volatiles in the interaction between soybean (Glycine max) and the Mexican soybean weevil (Rhyssomatus nigerrimus)
- Author
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K. Espadas-Pinacho, Jaime Gómez-Ruiz, Guillermo López-Guillén, and Leopoldo Cruz-López
- Subjects
0106 biological sciences ,Male ,QH301-705.5 ,linalool ,Science ,SPME ,medicine.disease_cause ,01 natural sciences ,limoneno ,chemistry.chemical_compound ,Linalool ,Infestation ,Acetone ,medicine ,Animals ,Food science ,Biology (General) ,(E)-β-ocimeno ,Limonene ,salicilato de metila ,biology ,Weevil ,fungi ,Botany ,(E)-β-ocimene ,food and beverages ,linalol ,biology.organism_classification ,methyl salicylate ,010602 entomology ,QL1-991 ,chemistry ,QK1-989 ,Glycine ,limonene ,Kovats retention index ,Weevils ,Female ,Soybeans ,General Agricultural and Biological Sciences ,Zoology ,Methyl salicylate ,010606 plant biology & botany - Abstract
The present study analyzed the volatile compounds emitted by Glycine max (cv. FT-Cristalina-RCH) soybean plants: healthy plants and plants damaged mechanically or by the Mexican soybean weevil Rhyssomatus nigerrimus. The SPME method was used to compare the volatile profile of soybean plants in four different conditions. The volatile profile of G. max plants infested by R. nigerrimus was qualitatively and quantitatively different from that of healthy and mechanically damaged plants. Emission of 59 compounds was detected in the four treatments. Of these compounds, 19 were identified by comparison of the Kovats index, mass spectrum and retention times with those of synthetic standards. An increase in concentration of the volatiles (Z)-3-hexenyl acetate and the compound 1-octen-3-ol was observed when the soybean plants were mechanically damaged. The compounds mostly produced by the soybean plant during infestation by male and female R. nigerrimus were 1-octen-3-ol, 6-methyl-5-hepten-2-one, (E)-β-ocimene, salicylaldehyde, unknown 10, linalool, methyl salicylate, (Z)-8-dodecenyl acetate (ester 5), ketone 2 and geranyl acetone. Behavioral effects of the identified compounds during the insect-plant interaction and their conspecifics are discussed. Resumo O presente estudo analisou os compostos voláteis emitidos pelas plantas de soja Glycine max (cv. FT-Cristalina-RCH): plantas e plantas sadias danificadas mecanicamente ou pelo gorgulho da soja mexicana Rhyssomatus nigerrimus. O método SPME foi utilizado para comparar o perfil volátil de plantas de soja em quatro diferentes condições. O perfil volátil das plantas de G. max infestadas por R. nigerrimus foi qualitativa e quantitativamente diferente do das plantas saudáveis e danificadas mecanicamente. Foi detectada, nos quatro tratamentos, emissão de 59 compostos, dos quais 19 foram identificados por comparação do índice de Kovats, espectro de massa e tempos de retenção com aqueles de padrões sintéticos. Um aumento na concentração dos voláteis acetato de (Z)-3-hexil e do composto 1-octeno-3-ol foi observado quando as plantas de soja foram mecanicamente danificadas. Os compostos produzidos principalmente pela planta de soja durante a infestação por R. nigerrimus macho e fêmea foram 1-octeno-3-ol, 6-metil-5-hepteno-2-ona, (E)-β-ocimeno, salicilaldeído, desconhecido 10, linalol, salicilato de metila, acetato de (Z)-8-dodecenila (éster 5), cetona 2 e geranil acetona. Foram discutidos os efeitos comportamentais dos compostos identificados durante a interação inseto-planta e seus coespecíficos.
- Published
- 2019
48. Chromatographic profiles and chiral purity of lavender essential oils
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Sirtautaitė, Miglė and Jakštas, Valdas
- Subjects
lavender ,essential oil ,gas chromatography ,linalol - Abstract
The aim of study: to evaluate lavender essential oils composition of different manufacturers and chiral purity variations of lavender essential oils samples according to European pharmacopoeia and the International Organization for Standartization normative criteria.Tasks: To compare lavender essential oils composition of different manufacturers chromatographic profiles while applying gas chromatography method; To determine parameter indicator change of chiral purity of lavender essential oils of different manufacturers using gas chromatography method. The object of study: lavender essential oils of different manufacturers. The result of the research: after analyzing the chromatographic profiles of the lavender essential oils composition of different manufacturer they were found that closest to quality requirements by composition, set by European pharmacopoeia and the International Organization for Standartization, are French made EAM1 and EAM3 lavender essential oil samples. After studying chiral purity parameter indicator change in different lavender essential oils by using gas chromatography method, it was concluded that composition of lavender essential oils samples, made in Russia – EAM7 and Germany – EAM6, does not match normative criteria (exceeded allowed rate by 4 and more) according to European pharmacopoeia monography regulated (S)-linalol percentage. (S)-linalol concentration met European pharmacopoeia specified normative criteria in other samples.
- Published
- 2019
49. Desempenho antif?ngico de ?leos essenciais de canela, cravo e louro em bolores de p?es de forma integrais
- Author
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Silveira, Mariana Pereira, Schmiele, M?rcio, Molina, Franciele Maria Pelissari, Clerici, Maria Teresa Pedrosa Silva, Cardoso, Giselle Pereira, and Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
- Subjects
Natural antimicrobials ,Cineol ,Linalol ,R?tulo limpo ,Linalool ,Molds ,Inhibition zone ,Clean label ,Panifica??o ,Eugenol ,Halo de inibi??o ,Bolores ,Baking ,Antimicrobianos naturais - Abstract
O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento do Pessoal de N?vel Superior - Brasil (CAPES) ? C?digo de Financiamento 001. Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2020-11-18T14:21:42Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_pereira_silveira.pdf: 3839553 bytes, checksum: e72d5330dae4924acbfba2e66ac51d96 (MD5) Approved for entry into archive by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2020-11-18T14:24:39Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_pereira_silveira.pdf: 3839553 bytes, checksum: e72d5330dae4924acbfba2e66ac51d96 (MD5) Made available in DSpace on 2020-11-18T14:24:39Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_pereira_silveira.pdf: 3839553 bytes, checksum: e72d5330dae4924acbfba2e66ac51d96 (MD5) Previous issue date: 2019 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) A exig?ncia do mercado consumidor atual pela substitui??o de aditivos qu?micos por biopreservadores alternativos tem impulsionado os estudos envolvendo a utiliza??o de conservantes naturais. Os ?leos essenciais (OEs) s?o metab?litos secund?rios produzidos por certas esp?cies de plantas que podem atuar como agentes antibacterianos, antivirais, antif?ngicos, antioxidantes, anti-inflamat?rios e inseticidas. Os produtos de panifica??o, especialmente p?es integrais, s?o altamente suscept?veis a deteriora??o por fungos, o que exige a utiliza??o de algum tipo de conservante para extens?o da vida-de-prateleira. Al?m disso, existe uma crescente demanda de embalagens ativas antimicrobianas que podem ser utilizadas neste tipo de alimento. Diante disso, este estudo objetivou: (i) isolar e identificar bolores de p?es de forma integrais; (ii) determinar a melhor propor??o de OEs de canela (Cinamomum cassia), cravo (Eugenia caryophyllus) e louro (Laurus nobilis) para inibi??o destes micro-organismos, atrav?s de avalia??o da atividade antif?ngica in vitro; (iii) aplicar uma mistura otimizada dos 3 OEs em p?es de forma integrais pelos m?todos de adi??o ? massa e aspers?o na superf?cie, com o objetivo de retardar o desenvolvimento de bolores deteriorantes; (iv) produzir e caracterizar um filme antimicrobiano otimizado de amido de mandioca, gelatina e amido de mandioca hidroxipropilado intercruzado, adicionado de OEs de canela, cravo e louro. Os resultados indicaram a presen?a de fungos dos g?neros Penicillium spp., Aspergillus spp., e Rhizopus spp. O volume otimizado de OEs para inibi??o do crescimento f?ngico foi de 11,77 ?L/100 ?L de in?culo, contendo 34,2 % de OE de canela, 42,5 % de OE de cravo e 23,3 % de OE de louro. Com a adi??o direta de OEs ? massa dos p?es (0 a 1,42 ?L OEs/g massa) a vida-de-prateleira foi insatisfat?ria, com apenas 7 dias de durabilidade. Entretanto, a aplica??o da mistura de OEs na superf?cie dos p?es na concentra??o de 3,0 ?L OEs/g massa resultou em p?es integrais com vida ?til de 22 dias, mantidas as propriedades de conserva??o, textura instrumental e umidade adequadas, quando comparadas aos tratamentos controle. As melhores propriedades f?sicas foram obtidas para um filme otimizado contendo 65,8 % de amido de mandioca e 34,2 % de gelatina. Os resultados mostraram ainda que o filme contendo 0,97 % de OE de canela e 0,01 % de OE de cravo (com base na solu??o filmog?nica) apresentou maior inibi??o no desenvolvimento de bolores isolados dos p?es, mantendo-se vi?veis as propriedades f?sicas e mec?nicas dos filmes. Disserta??o (Mestrado) ? Programa de P?s-gradua??o em Ci?ncia e Tecnologia de Alimentos, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2019. The current consumer market's demand for replacement of chemical additives by alternative biopreservatives has been driving studies involving the use of natural preservatives. Essential oils (EOs) are secondary metabolites produced by certain plant species that can act as antibacterial, antiviral, antifungal, antioxidant, anti-inflammatory and insecticide agents. Bakery products, especially whole-grain breads, are highly susceptible to fungal spoilage, which requires the use of some kind of preservative for shelf-life extension. In addition, there is an increasing demand for active antimicrobial packaging which can be used in this type of food. Therefore, this study aimed to: (i) isolate and identify whole-grain bread molds; (ii) determine the best proportion of EOs of cinnamon (Cinamomum cassia), clove (Eugenia caryophyllus) and laurel (Laurus nobilis) through evaluation of in vitro antifungal activity; (iii) applying an optimized blend of 3 EOs in whole-grain breads by direct addition to the dough and surface spraying methods, in order to delay the development of spoilage molds; (iv) produce and characterize an optimized cassava starch, gelatin and crosslinked hydroxypropylated cassava starch film with antimicrobial properties, added with cinnamon, clove and laurel OEs. The results indicated the presence of Penicillium spp., Aspergillus spp., and Rhizopus spp fungi genus. The optimum volume of EOs for inhibition of fungal growth was 11.77 ?L/100 ?L of inoculum, containing 34.2 % EO of cinnamon, 42.5 % of EO clove and 23.3 % of EO of laurel. With the direct addition of EOs to the bread dough (0 to 1.42 ?L EOs / g of dough) the shelf-life was unsatisfactory, with only 7 days of durability. However, the application of EO mixture on the surface of the loaves in the concentration of 3.0 ?L EO / g of dough resulted in wholemeal loaves with a 22-days of shelf life, maintaining adequate conservation, texture and moisture properties when compared to control treatments. The best physical properties were obtained for an optimized film containing 65.8 % cassava starch and 34.2 % gelatin. The results also showed that the film containing 0.97 % EO of cinnamon and 0.01 % of EO of clove (on the film-forming solution basis) presented greater inhibition on the development of molds, keeping the viability of the physical and mechanical properties of the films.
- Published
- 2019
50. Óleo essencial de Cinnamomum camphora var. linaloolifera no controle de pragas: Seu efeito sobre Trialeurodes vaporariorum (Hemiptera: Aleyrodidae)
- Author
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Camila Bonatto Vicenço, Neiva Monteiro de Barros, Wendel Paulo Silvestre, Joséli Schwambach, and Gabriel Fernandes Pauletti
- Subjects
0106 biological sciences ,Integrated pest management ,Linalol ,Control alternativo ,Cinnamomum camphora ,Trialeurodes ,Mosca-branca-de-casa-de-vegetação ,01 natural sciences ,Linalool ,law.invention ,Toxicology ,03 medical and health sciences ,chemistry.chemical_compound ,law ,Nymph ,Essential oil ,030304 developmental biology ,General Environmental Science ,0303 health sciences ,biology ,Terpenes ,business.industry ,Greenhouse whitefly ,Bioinsecticide ,Pest control ,Bioinsecticida ,Mosca blanca de invernadero ,biology.organism_classification ,Terpenos ,chemistry ,Bioinseticida ,General Earth and Planetary Sciences ,Controle alternativo ,Alternative control ,business ,010606 plant biology & botany - Abstract
This study evaluated the insecticidal effect of Cinnamomum camphora var. linaloolifera essential oil and its major compound, linalool, on Trialeurodes vaporariorum. Essential oil treatments were applied at 0.5, 1.0, 1.5, and 2.0% v/v on eggs, nymphs, and adult individuals and linalool equivalent concentrations on nymphs of T. vaporariorum. The negative controls water and Tween-80® (0.5% v/v) and a positive control (spiromesifen 0.05% v/v for eggs and nymphs; pymetrozine 0.04% m/v for adults) were also used. The essential oil of C. camphora at 2.0% v/v caused egg mortality of 49.7%; same concentration caused the highest nymph mortality (88.5%). For adults, the essential oil at 2.0% v/v caused the highest mortality (40.0%) after 48 h, not changing from 48 to 72 h. The essential oil and linalool performed similarly relative to the nymphs, whose mortalities have not differed statistically, with exception of the concentrations of 0.5 and 1.0% v/v. Regarding the chemical control, the concentration of 2.0% v/v has had similar mortality for nymphs; for eggs and adults, the essential oil caused lower mortality (49.4 and 40.0%) than the synthetic pesticide (65.0 and 72.0%). The essential oil of C. camphora may be a potential control alternative for T. vaporariorum, especially regarding the Integrated Pest Management (IPM) practices. Este trabajo evaluó el efecto insecticida del aceite esencial de Cinnamomum camphora var. linaloolifera y su compuesto principal, linalool, en Trialeurodes vaporariorum. Tratamientos que contienen aceite esencial en concentraciones de 0,5; 1,0; Se aplicaron 1,5 y 2,0% v/v a huevos, ninfas e individuos adultos de T. vaporariorum. Los controles negativos fueron agua y también se utilizó Tween-80® (0,5% v/v) más un control positivo (espiromesifeno 0,05% v/v para huevos y ninfas; pimetrozina 0,04% p/v para adultos). El aceite esencial de C. camphora al 2,0% v/v provocó una mortalidad de huevos del 49,7%; la misma concentración causó la mayor mortalidad de ninfas (88,5%). Para los adultos, el aceite esencial al 2.0% v/v causó el mayor porcentaje de mortalidad (40,0%) después de 48 h, y no cambió entre 48 y 72 h. El aceite esencial y el linalol se comportaron de manera similar en relación a las ninfas, cuyas mortalidades no difirieron estadísticamente, con la excepción de concentraciones de 0,5 y 1,0% v/v. En relación al control químico, la concentración de 2,0% v/v presentó similar mortalidad para ninfas; para huevos y adultos, el aceite esencial causó una menor mortalidad (49,4 y 40,0%) que el plaguicida sintético (65,0 y 72,0%). El aceite esencial de C. camphora puede ser un control alternativo para T. vaporariorum, especialmente considerando las prácticas de Manejo Integrado de Plagas (MIP). Este trabalho avaliou o efeito inseticida do óleo essencial de Cinnamomum camphora var. linaloolifera e seu compostos majoritário, o linalol, sobre Trialeurodes vaporariorum. Tratamentos contendo óleo essencial nas concentrações de 0,5; 1,0; 1,5 e 2,0% v/v foram aplicados sobre ovos, ninfas e indivíduos adultos de T. vaporariorum. Os controles negativos foram água e Tween-80® (0,5% v/v) mais um controle positivo (espiromesifeno 0,05% v/v para ovos e ninfas; pimetrozina 0,04% m/v para adultos) foram também usados. O óleo essencial de C. camphora a 2,0% v/v causou mortalidade de ovos de 49,7%; a mesma concentração causou a maior mortalidade de ninfas (88,5%). Para os adultos, o óleo essencial a 2,0% v/v causou a maior porcentagem de mortalidade (40,0%) após 48 h, não se alterando entre 48 e 72 h. O óleo essencial e o linalol tiveram desempenho semelhante com relação às ninfas, cujas mortalidades não diferiram estatisticamente, com exceção das concentrações de 0,5 e 1,0% v/v. Em relação ao controle químico, a concentração de 2,0% v/v apresentou mortalidade similar para ninfas; para ovos e adultos, o óleo essencial causou menores mortalidades (49,4 e 40,0%) do que o pesticida sintético (65,0 e 72,0%). O óleo essencial de C. camphora pode ser uma alternativa de controle para T. vaporariorum, especialmente tendo em vista as práticas do Manejo Integrado de Pragas (MIP).
- Published
- 2021
- Full Text
- View/download PDF
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