19 results on '"Sônia Maria Costa Siqueira"'
Search Results
2. AVALIAÇÃO IN VITRO DA ATIVIDADE FOTOPROTETORA E ANTIOXIDANTE DE EXTRATOS VEGETAIS DE CITRULLUS LANATUS (THUNB.) MATSUM. and NAKAI / IN VITRO EVALUATION OF THE PHOTOPROTECTIVE AND ANTIOXIDANT ACTIVITY OF VEGETABLE EXTRACTS OF CITRULLUS LANATUS (THUNB.) MATSUM. and NAKAI
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Artur Moura Fernandes, Antônia Fádia Valentim de Amorim, Sônia Maria Costa Siqueira, Renato Almeida Montes, Daniel Pereira de Oliveira, Milena Lira Furtado, Nádia Aguiar Portela Pinheiro, and Otilia Alves de Alcântara
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Marketing ,Pharmacology ,Organizational Behavior and Human Resource Management ,Antioxidant ,Traditional medicine ,Citrullus lanatus ,biology ,Chemistry ,Strategy and Management ,medicine.medical_treatment ,Pharmaceutical Science ,biology.organism_classification ,Drug Discovery ,medicine - Abstract
A exposicao aos raios solares e um processo de suma relevância para ajustar o metabolismo do corpo, principalmente para a producao de vitamina D, entretanto, a exposicao excessiva pode causar graves problemas a saude, tais como melasma, envelhecimento precoce, entre outros, decorrentes da producao de radicais livres ocasionado pela absorcao de raios UV no tecido. Uma alternativa para evitar isso esta no uso de protetores solares, por sua vez, causam efeitos colaterais devido a existencia de produtos quimicos adversos, alem de agredir o ecossistema. A especie Citrullus Lanatus (melancia) se destaca pela sua riqueza em antioxidantes e agua e por possuir propriedades antimicrobiana, antibacteriana, anti-inflamatoria, entre outras. Assim, esta pesquisa prontifica-se a apresentar uma alternativa natural, acessivel e eficaz para auxiliar nesta questao, baseado nas caracteristicas fitoquimicas da especie. Para tanto, foram preparados os extratos etanolicos das folhas e sementes da especie, quantificado os teores de fenois totais e flavonoides e determinado a acao antioxidante por meio do radical DPPH e β-Caroteno. Os teores de fenois calculados das folhas e sementes foram 196,66 ± 0,8 mg EqAG/g e 73,33 ± 0,39 mg EqAG/g, respectivamente. O teor de flavonoides calculado nas folhas foi de 25,00 ± 0,07 mg EqC/g e nas sementes de 37,5 ± 0,64 mg EqC/g. A melhor atividade antioxidante foi frente ao β -Caroteno, em que as sementes apresentaram IC50 =6,08 ± 3,66 e as folhas IC50 = 5,76 ± 4,06. Pelo metodo DPPH, obteve-se nas folhas o IC50= 62,70 ± 0,41 e nas sementes IC50= 194,58 ± 4,77. Ambos materiais apresentaram boa atividade fotoprotetora, para as sementes o Fator de Protecao Solar foi de 5,74 ± 0,07 e para as folhas foi 7,16 ± 0,09.
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- 2021
3. OBTENÇÃO E ESTUDOS DE ESTABILIDADE DE BIOHIDROGEIS DE GALACTOMANANA ADITIVADO COM EMULSÃO DE ÓLEO DE ABACATE
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Carlos Eduardo Pereira de Freitas, Filipe Augusto Gomes Braga, Antônia Fádia Valentim de Amorim, Antônio Macario Junior, Sônia Maria Costa Siqueira, Francisco Valmiller Lima de Oliveira, Adriele Sousa Silva, and Amanda Maria Barros Alves
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Marketing ,Pharmacology ,Organizational Behavior and Human Resource Management ,Strategy and Management ,Drug Discovery ,Pharmaceutical Science - Published
- 2020
4. AVALIAÇÃO DAS ATIVIDADES ANTIOXIDANTE E FOTOPROTETORA DA ESPÉCIE SYZYGIUM CUMINI (L.) SKEELS / EVALUATION OF ANTIOXIDANT AND PHOTOPROTECTIVE ACTIVITIES OF THE SPECIES SYZYGIUM CUMINI (L.) SKEELS
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Sônia Maria Costa Siqueira, Artur Moura Fernandes, Alissa Ellen Queiroz Ribeiro Campos, Milena Lira Furtado, Nádia Aguiar Portela Pinheiro, and Antônia Fádia Valentim de Amorim
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Marketing ,Pharmacology ,Organizational Behavior and Human Resource Management ,Antioxidant ,biology ,Traditional medicine ,Syzygium ,Strategy and Management ,medicine.medical_treatment ,Drug Discovery ,medicine ,Pharmaceutical Science ,biology.organism_classification - Published
- 2020
5. Obtenção e estudo de estabilidade de biohidrogel de galactomanana aditivado com emulsão de óleo de coco
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Adriele Sousa Silva, Antônia Fádia Valentim de Amorim, Carlos Eduardo Pereira de Freitas, Amanda Maria Barros Alves, Francisco Valmiller Lima de Oliveira, Filipe Augusto Gomes Braga, Antônio Macario Junior, and Sônia Maria Costa Siqueira
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Marketing ,Pharmacology ,Organizational Behavior and Human Resource Management ,Strategy and Management ,Drug Discovery ,Pharmaceutical Science - Published
- 2020
6. ESTUDOS DE ESTABILIDADE DE BIOHIDROGEL DE GALACTOMANANA ADITIVADO COM EMULSÃO DE ÓLEO DE CASTANHA-DO-PARÁ
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Daniela Colaça da Silva, Yorrana Victor de Lima, Antônia Fádia Valentim de Amorim, Andressa Yanne Soares Alves, Sônia Maria Costa Siqueira, Antônio Macario Junior, Carlos Eduardo Pereira de Freitas, and Albert Nascimento Braga
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Os biohidrogeis apresentam algumas vantagens que os tornam muito interessantes para aplicações cosméticas, por exemplo: atoxicidade, capacidade de intumescer em água e fluídos biológicos, consistência elastomérica e alta permeabilidade. os biohidrogeis naturais oferecem vantagens em relação a agentes sintéticos, incluindo aumento da hidrofilicidade e aumento da porosidade. O presente trabalho teve como objetivo o desenvolvimento e estudos de estabilidade de um biohidrogel de galactomanana, um polissacarídeo que atua como reserva estando presente nas leguminosas, e em misturas binárias com outros materiais formam géis que são utilizados nas mais diversas aplicações. O biohidrogel de galactomanana foi aditivado com óleo de castanha-do-Pará devido ao seu alto potencial hidratante. O biohidrogel da galactomanana obtido apresentou, aspecto gelatinoso de cor branca e pH 5. O biohidrogel aditivado foi submetido aos testes para averiguar as suas características sensoriais e físico-químicas. O estudo de estabilidade se manteve dentro do padrão proposto pela agência reguladora, onde todas as amostras se mantiveram estáveis ao longo dos testes. assim demonstrando que os componentes químicos não sofreram alterações.
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- 2021
7. ESTUDO IN VITRO DA ATIVIDADE ANTIOXIDANTE POR CAPTURA DO RADICAL LIVRE DPPH E ANÁLISE DA ATIVIDADE FOTOPROTETORA DO ÓLEO DE CASTANHA-DO-PARÁ EXTRAÍDO COM SOLVENTE ALTERNATIVO
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Alissa Ellen Queiroz, Antônia Fádia Valentim de Amorim, Sônia Maria Costa Siqueira, Amanda Maria Barros Alves, Andressa Yanne Soares Alves, Daniela Colaça da Silva, Antônio Macario Junior, and Carlos Eduardo Pereira de Freitas
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chemistry.chemical_compound ,Antioxidant ,Traditional medicine ,chemistry ,DPPH ,medicine.medical_treatment ,medicine ,In vitro study - Abstract
Os antioxidantes podem ser definidos como um conjunto heterogêneo de substâncias compostas por minerais, os compostos tocoferóis e tocotrienóis são constituintes da família da vitamina E. Eles atuam ativamente como antioxidante natural, no entanto na composição de castanhas incluindo as amêndoas utilizadas para a extração do óleo, possuem a capacidade de bloquear o efeito danoso dos radicais livres, prevenindo algumas doenças como por exemplo câncer de pele e também possuem a capacidade de retardar o envelhecimento precoce da pele. O óleo utilizado neste estudo foi extraído no laboratório de tecnologia química da Universidade Estadual do Ceará (UECE), utilizando soxhlet e como solvente o etanol. A partir do óleo castanha-do-Pará foram preparadas soluções etanólicas das amostras de óleo, emulsão e Hidroxitolueno Butilado (BHT) em concentrações distinta e um controle negativo foi feito pela adição de etanol e DPPH e posteriormente o valor da captura do radical livre foi calculado através de equação. Para determinar o FPS in vitro foi utilizado o método do espectrofotômetro elaborado por Mansur et al. Ao analisar a atividade antioxidante foi verificado uma captura de 71,03% do radical livre e quanto a atividade fotoprotetora foi verificado FPS 2.
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- 2021
8. EXTRAÇÃO DO ÓLEO DE CASTANHA-DO-PARÁ VIA SOXHLET UTILIZANDO SOLVENTE ALTERNATIVO
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Yorrana Victor de Lima, Carlos Eduardo Pereira de Freitas, Andressa Yanne Soares Alves, Antônio Macario Junior, Antônia Fádia Valentim de Amorim, Sônia Maria Costa Siqueira, Sarah Geysa de Oliveira Ribeiro, and Daniela Colaça da Silva
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A castanheira do brasil (Bertholletia excelsa) espécie onde se origina a castanha-do-brasil. também conhecida como castanha-do-Pará, é pertencente à família Lecythidaceae. Esta espécie possui um grande valor econômico, pois dispõe de um alto valor extrativo da Amazônia. Na composição da castanha podemos encontrar vitaminas A, E, B1 e B3 e alguns minerais, tais como cálcio, ferro, sódio, magnésio, selênio, potássio e outros em menores proporções. Convencionalmente utilizamos solventes derivados de petróleo para a extração, sendo o mais utilizado o hexano, no entanto o hexano tem um grande impacto para o meio ambiente, saúde humana e animal, logo a utilização de solventes alternativos tais como acetona, etanol e isopropanol vem sendo uma opção bastante estudada nos últimos anos, justamente com o intuito de diminuir o impacto ambiental. A extração seguiu por duas etapas com 12h de duração cada utilizando o etanol como solvente, ao fim do processo o rendimento foi calculado em função do volume. O rendimento do óleo obtido foi de 37,22% e o seu teor de umidade de 16%. A determinação do pH foi realizada com pHmetro digital e obteve um pH de 5,3. O valor calculado densidade foi de 0,874 g/cm3.
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- 2021
9. Pectinas de frutas cítricas: Isolamento, Amidação, Caracterização e Capacidade adsorvente de íons chumbo
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Nádia Aguiar Portela Pinheiro, Amanda Maria Barros Alves, Alissa Ellen Queiroz Ribeiro Campos, Raimundo Rafael de Almeida, Flávia Oliveira Monteiro da Silva Abreu, Nágila Maria Pontes Silva Ricardo, Ícaro Gusmão Pinto Vieira, and Sônia Maria Costa Siqueira
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General Earth and Planetary Sciences ,General Environmental Science - Abstract
Metais em efluentes causam problemas aos seres humanos e à natureza, por isso, buscar substâncias para adsorvê-los é de extrema importância. A literatura reporta a relevância das pectinas como biossorventes de metais pesados. Assim, o objetivo foi extrair, modificar e comparar pectinas do limão Siciliano e laranja Baía, visando aproveitamento e valorização desses resíduos, para adsorção de Pb2+. A extração foi realizada com oxalato de amônio e as caracterizações por infravermelho, ressonância magnética nuclear de hidrogênio, cromatografia de permeação em gel e cromatografia líquida de alta eficiência. Os materiais foram avaliados quanto aos modelos cinéticos e a capacidade de adsorção em função do pH e das concentrações. A modificação foi confirmada por FT-IR a partir das bandas correspondentes as amidas. Os espectros mostraram que ambas são de baixo grau de esterificação, com 36,86% e 33,33% para o limão e laranja, respectivamente. Porém, apresentaram elevados percentuais de amidação com 61,00% e 50,00% para limão e laranja, respectivamente. Ambas foram classificadas como polimoleculares, polidispersas e entre os açúcares identificados, apenas a ramnose não foi detectada na pectina da laranja. As amostras apresentaram excelentes taxas de remoção, 94,86% para laranja e 86,45% para limão, na concentração de 250 mg/L, adequando-se ao modelo de pseudo-segunda ordem. Portanto, as pectinas amidadas são importantes para quimissorção de Pb2+, devido à alta capacidade adsorvente em várias concentrações, destacando a laranja que apresentou percentuais crescentes de remoção em todas as concentrações.
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- 2022
10. AVALIAÇÃO DA ATIVIDADE ANTIACETILCOLINESTERASE E TOXICIDADE FRENTE À ARTEMIA SALINA DO EXTRATO ETANÓLICO DAS FOLHAS DA MOMORDICA CHARANTIA L
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Milena Lira Furtado, Sônia Maria Costa Siqueira, Nádia Aguiar Portela Pinheiro, Selene Maia de Morais, Jane Eire Silva Alencar de Menezes, Otilia Alves de Alcântara, Luan Rodrigues Olinda Mendonça, Renato Almeida Montes, Antônia Fádia Valentim de Amorim, and Artur Moura Fernandes
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- 2020
11. Microencapsulation of riboflavin with galactomannan biopolymer and F127: Physico-chemical characterization, antifungal activity and controlled release
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Nágila M.P.S. Ricardo, Selene Maia de Morais, Silvana Silveira de Farias, Antônia Fádia Valentim de Amorim, Jane Eire Silva Alencar de Menezes, Sônia Maria Costa Siqueira, Arcelina Pacheco Cunha, Carlos Alberto Gomes de Souza, Raquel Oliveira dos Santos Fontenelle, and Tamara Gonçalves de Araújo
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Chromatography ,biology ,Chemistry ,04 agricultural and veterinary sciences ,02 engineering and technology ,engineering.material ,021001 nanoscience & nanotechnology ,biology.organism_classification ,040401 food science ,Controlled release ,In vitro ,Galactomannan ,chemistry.chemical_compound ,0404 agricultural biotechnology ,Pulmonary surfactant ,Spray drying ,engineering ,Proton NMR ,Biopolymer ,0210 nano-technology ,Candida albicans ,Agronomy and Crop Science - Abstract
Riboflavin (Rf) is a water-soluble vitamin essential for living beings; it acts as cofactor in various processes of oxidation-reduction in a cellular system. However it is photosensitive and may suffer reactions of degradation. In this way, the objective of this study was to perform the microencapsulation of (Rf) by spray drying with the galactomannan biopolymer (G), in order to preserve or enhance their functional properties. Microencapsulation was used as the coating matrix for the biopolymer (G) and the surfactant F127 in concentrations of 0.10% and 0.15%. The biopolymer (G), (Rf) and the microparticles produced (GRf, GRfF1 and GRfF2) were characterized by FT-IR, XRD, TGA, DSC and SEM. Biopolymer (G) was characterized by 1H NMR and its viscosity was studied. The microparticles produced were analyzed for viscosity, antifungal activity and controlled release in vitro. The antifungal activity of the microparticles was evaluated by means of the broth microdiluition method and checkerboard test using strains of Trichophyton rubrum e Candida albicans. Controlled release was performed with the (Rf) and the microparticles in pH 1.2 (0.1 M) and pH 6.8 (0.025 M). By means of chemical tests it was found that the efficiency of encapsulation in microparticles ranged from 87.14-88.53%. The viscometric study pointed to greater fluidity of the microparticles produced when compared with biopolymer (G). All the microparticles produced showed antifungal potential against T. rubrum, however the (GRf) demonstrated better inhibitory capacity. In the checkboard test there was no synergistic effect of the (GRf) microparticles with ketoconazole. The release showed that the biopolymer (G) is a satisfactory matrix for the microencapsulation of (Rf), since it slows the release in both acidic and basic media when compared with the isolated (Rf). These results indicate that the galactomannan can be used efficiently in the microencapsulation of (Rf), since it conserves the antifungal potential against T.rubrum and slows the delivery of the bioactive.
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- 2018
12. Physical-chemical characterization, controlled release, and toxicological potential of galactomannan-bixin microparticles
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Tamara Gonçalves de Araújo, Emmanuel Silva Marinho, Jane Eire Silva Alencar de Menezes, Francisco W.Q. Almeida-Neto, Selene Maia de Morais, Sônia Maria Costa Siqueira, Gilberto Dantas Saraiva, Antônia Fádia Valentim de Amorim, Hélcio Silva dos Santos, Nágila M.P.S. Ricardo, Luana Carvalho da Silva, Pedro de Lima-Neto, Alexandre Magno Rodrigues Teixeira, and Karla L.L. Pascoal
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chemistry.chemical_classification ,Organic Chemistry ,Bixin ,Infrared spectroscopy ,Polymer ,Chemical reaction ,Controlled release ,Analytical Chemistry ,Inorganic Chemistry ,Galactomannan ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Spray drying ,Particle ,Spectroscopy - Abstract
In this study, a spray drying technique was used to encapsulate bixin in the galactomannan polymer to give greater stability to this carotenoid. The microparticles were characterized using physical-chemical techniques, quantum chemical calculations, and evaluated the particle sizes, encapsulation efficiency, stability, controlled release, and toxicological potential. The bixin was successfully encapsulated, with an average size of 5.55 ± 0.50 µm, and infrared spectroscopy showed no chemical reaction between bixin and galactomannan during the encapsulation process. The values for the encapsulation efficiency were higher than 90 %, indicating that galactomannan was a good encapsulating agent. A stability test revealed that microencapsulation provides significant protection for bixin. It was observed that the microparticles were capable of releasing the pigment homogeneously and gradually. The absence of toxicity of these materials allows for their use within the food industry, since there is a need for new products that combine low toxicity, efficiency, and low cost.
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- 2021
13. PREPARATION, PHYSICOCHEMICAL CHARACTERIZATION AND CONTROLLED RELEASE OF GALACTOMANNAN MICROPARTICLES CONTAINING ALLANTOIN
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Jane Eire Silva Alencar de Menezes, Nágila M.P.S. Ricardo, Tamara Gonçalves de Araújo, Hilana B. M. Frota, Sônia Maria Costa Siqueira, Carlos Alberto Gomes de Souza, Hélcio Silva dos Santos, and Paulo Nogueira Bandeira
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Chemistry ,allantoin ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,lcsh:Chemistry ,lcsh:QD1-999 ,galactomannan ,microencapsulation ,characterization ,0210 nano-technology ,controlled release - Abstract
In this work, the allantoin was encapsulated with galactomannan extruded from Delonyx regia, by the spray drying technique. The microparticles obtained were structurally characterized by infrared spectroscopy (IR), thermal analysis, scanning electron microscopy (SEM) and the controlled release profile was evaluated. The results of IR suggested the formation of the polymeric wall of the microcapsules and SEM revealed spherical particles with an average size range of 2.84 ± 0.41 µm. X-ray diffraction showed the loss of crystallinity of the active after encapsulation and differential explanatory calorimetry exhibited the loss of its peak melt. The encapsulation efficiency for the microparticles was approximately 84% for the different environmental conditions. The coating of allantoin with the biopolymer promoted a gradual release of the drug over a period of 6 hours and these results are in accordance with the Brazilian Pharmacopoeia. The set of results obtained in this work is relevant and accredits the system developed as a possible alternative for the formation of encapsulated natural drugs destined to possible treatments of cutaneous cellular regeneration.
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- 2018
14. Effects of Polypropylene Glycol 400 (PPG400) on the Micellization and Gelation of Pluronic F127
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Stephen G. Yeates, Nadja M. P. S. Ricardo, Débora Hellen Almeida de Brito, Maria Elenir Nobre Pinho Ribeiro, Kamilla Barreto Silveira Costa, Nágila M.P.S. Ricardo, Antônia Fádia Valentim de Amorim, Chiraphon Chaibunditc, Carolina Moura de Lima, and Sônia Maria Costa Siqueira
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Aqueous solution ,Polymers and Plastics ,Rheometry ,Chemistry ,Small-angle X-ray scattering ,Organic Chemistry ,Poloxamer ,Micelle ,Adduct ,Inorganic Chemistry ,chemistry.chemical_compound ,Polypropylene glycol ,Chemical engineering ,Critical micelle concentration ,Polymer chemistry ,Materials Chemistry - Abstract
In dilute aqueous solution unimers of Pluronic F127 associate to form micelles. In more concentrated solution, micelles pack to form high-modulus gels. Our interest is the effect of addition of 10–30 wt % low molecular weight PPG400 on the micellization and gelation of solutions of F127. DLS was used to determine the apparent size of the micelles (rh,app). The critical micelle concentration (cmc) using the dye solubilization method of F127 in PPG400 solutions was studied. Visual observation was carried out to detect gel formation in concentrated solutions and the onset of clouding and turbidity, as the temperature was raised. Oscillatory rheometry was used to confirm the formation of high-modulus gels and provide values of elastic moduli (G′max) over a wide temperature range. SAXS was used to determine gel structure. Our results for the hydrophobic adduct PPG400 were compared with literature values for the hydrophilic adduct PEG6000.
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- 2015
15. Avaliação da inibição da enzima acetilcolinesterase do carotenoide bixina extraído das sementes de urucum
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A.M. Fernandes, R.S. Melo, Antônia Fádia Valentim de Amorim, Karla Larissa Lopes Pascoal, Sônia Maria Costa Siqueira, D.R. Alves, and Selene Maia de Morais
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- 2017
16. Anxiolytic-like effect of chalcone N-{(4′-[(E)-3-(4-fluorophenyl)-1-(phenyl) prop-2-en-1-one]} acetamide on adult zebrafish (Danio rerio): Involvement of the GABAergic system
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Joyce dos Reis Lima, Hélcio Silva dos Santos, Francisca Crislândia Oliveira Silva, Adriana Rolim Campos, Jane Eire Silva Alencar de Menezes, Francisco Ernani Alves Magalhães, Sheila M. Barroso, Telma L. G. Lemos, Antônio Eufrásio Vieira Neto, Paulo Nogueira Bandeira, Sônia Maria Costa Siqueira, Antonio Wlisses da Silva, Maria Kueirislene Amâncio Ferreira, and Carlos Leone Alves Holanda
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Male ,Chalcone ,GABA Agents ,medicine.drug_class ,Danio ,Anxiety ,Motor Activity ,Pharmacology ,Anxiolytic ,Open field ,GABA Antagonists ,03 medical and health sciences ,Behavioral Neuroscience ,chemistry.chemical_compound ,Chalcones ,0302 clinical medicine ,Acetamides ,medicine ,Animals ,GABAergic Neurons ,Zebrafish ,030304 developmental biology ,0303 health sciences ,Behavior, Animal ,biology ,GABAA receptor ,Antagonist ,Receptors, GABA-A ,biology.organism_classification ,Molecular Docking Simulation ,Anti-Anxiety Agents ,chemistry ,Flumazenil ,Female ,030217 neurology & neurosurgery ,Acetamide ,medicine.drug - Abstract
Benzodiazepines are the standard drugs for the treatment of anxiety, but their undesirable side effects make it necessary to develop new anxiolytic drugs. The objective of this study was to evaluate the possible anxiolytic-simile effect of synthetic chalcone N-{(4′-[(E)-3-(4-fluorophenyl)-1-(phenyl) prop-2-en-1-one]} acetamide (PAAPFBA) on adult zebrafish (Danio rerio). PAAPFBA was synthesized with an 88.21% yield and its chemical structure was determined by 1H and 13C NMR. Initially, animals (n = 6/group) were treated (4 or 12 or 40 mg/kg, intraperitoneal) with PAAPFBA and were submitted to acute toxicity and open field tests. Then, other groups (n = 6/each) received PAAPFBA for the analysis of its effect on the Light & Dark Test. The participation of the GABAergic system was also assessed using the GABAA antagonist flumazenil. Molecular docking was performed using the GABAA receptor. The effect of PAAPFBA on anxiety induced by alcohol withdrawal was analyzed. PAAPFBA was non-toxic, reduced the locomotor activity, and showed an anxiolytic-like effect in both models. This effect was reduced by pre-treatment with the flumazenil. In agreement with in vivo studies, molecular docking indicated an interaction between chalcone and the GABAA receptor. The results suggest that PAAPFBA is an anxiolytic agent mediated via the GABAergic system.
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- 2019
17. Phenolic Content and Antioxidant and Antiacetylcholinesterase Properties of Honeys from Different Floral Origins
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Denise Nogueira Ramos, Sônia Maria Costa Siqueira, Islay Lima Magalhães, Selene Maia de Morais, Lyeghyna K.A. Machado, Jane Eire Silva Alencar de Menezes, and Maria da Conceição Tavares Cavalcanti Liberato
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Antioxidant ,medicine.medical_treatment ,Flavonoid ,Medicine (miscellaneous) ,Flowers ,Antioxidants ,chemistry.chemical_compound ,Phenols ,Botany ,medicine ,Animals ,Phenol ,Food science ,Gallic acid ,Myracrodruon urundeuva ,Flavonoids ,chemistry.chemical_classification ,Nutrition and Dietetics ,biology ,Chemistry ,fungi ,food and beverages ,Biological activity ,Honey ,Bees ,biology.organism_classification ,Honey samples ,Lippia sidoides ,Cholinesterase Inhibitors - Abstract
Twenty-three honey samples of Apis mellifera L. forged on plants from northeastern Brazil were analyzed to determine total phenolic content, flavonoid content, antioxidant activity, and antiacetylcholinesterase activity. The total phenol content was determined by using the Folin-Ciocalteu method, and the flavonoid content was analyzed using by the aluminum chloride method. The antioxidant activity was evaluated using the diphenyl-1-picrylhydrazyl-scavenging test. Honey samples from Lippia sidoides Cham. (mean [±standard deviation] 50% inhibitory concentration [IC(50)], 4.20±1.07 mg/mL) and Myracrodruon urundeuva Fr. All. (IC(50), 28.27±1.41 mg/mL) showed better antioxidant activity and presented higher total phenol values (108.50±3.52 mg gallic acid equivalents/100 g for L. sidoides and 68.55±1.01 mg gallic acid equivalents/100 g for M. urundeuva). Several honey samples had relevant results on antiacetylcholinesterase assay. The biological activity of honeys is related to their floral origin, and medicinal plants constitute a useful resource for the generation of functional foods.
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- 2011
18. ENCAPSULATION OF L-ASCORBIC ACID WITHIN THE NATURAL BIOPOLYMER-GALACTOMANNAN-USING THE SPRAY-DRYING METHOD: PREPARATION, CHARACTERIZATION, AND EVALUATION OF ANTIOXIDANT ACTIVITY
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Tamara Gonçalves, Antônia Fádia Valentim de Amorim, Rayane Nunes Gomes, Selene Maia de Morais, Carlos A. G. de Souza, Sônia Maria Costa Siqueira, Nágila M.P.S. Ricardo, and Arcelina Pacheco Cunha
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Thermogravimetric analysis ,Crystallinity ,chemistry.chemical_compound ,Differential scanning calorimetry ,Chemistry ,Scanning electron microscope ,DPPH ,Spray drying ,Analytical chemistry ,Infrared spectroscopy ,Thermal stability ,General Chemistry ,Nuclear chemistry - Abstract
In this study, the spray drying technique was used to prepare L-ascorbic acid (AA) microparticles encapsulated with galactomannan-an extract from the seeds of the Delonix regia species. The physico-chemical characteristics, antioxidant activity, and encapsulation efficiency of the AA microparticles were evaluated and characterized using thermogravimetric analysis, differential scanning calorimetry, infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The free-radical scavenging activity of the AA microparticles was determined at different environmental conditions using DPPH (1,1-diphenyl-2-picryl-hydrazyl). X-ray diffraction measurements demonstrated a loss of crystallinity in AA after the encapsulation process, and a DSC scan also showed the loss of the compound's melting peak. Thermogravimetric analysis showed small differences in the thermal stability of galactomannan before and after the incorporation of AA. The mean diameters of the obtained spherical microspheres were in the range of 1.39 ± 0.77 µm. The encapsulation efficiency of AA microparticles in different environmental conditions varied from 95.40 to 97.92, and the antioxidant activity showed values ranging from 0.487 to 0.550 mg mL-1.
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- 2015
19. Correlation between the anti-radical, anti-acetylcholinesterase activities and phenolic content of some extracts of live herbal pharmacies in the Northeast of Brazil
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E.S.B. Cavalcanti, Sônia Maria Costa Siqueira, María Sol Souza, J.E.S.A. Menezes, K.S.B. Lima, Selene Maia de Morais, and M.T.S. Trevisan
- Subjects
Pharmacology ,doença de Alzheimer ,Traditional medicine ,antiradical ,lcsh:RS1-441 ,acetylcholinesterase ,farmácias vivas ,Biology ,live pharmacies ,anti-radical ,Alzheimer's disease ,lcsh:QK1-989 ,lcsh:Pharmacy and materia medica ,Complementary and alternative medicine ,lcsh:Botany ,acetilcolinesterase - Abstract
O objetivo deste trabalho foi avaliar a correlação entre o conteúdo de fenóis de extratos de 18 plantas medicinais comuns nas Farmácias Vivas com a atividade sequestradora do radical livre DPPH e com a inibição da enzima acetilcolinesterase. Maiores conteúdos de fenóis totais foram encontrados nas plantas: Eugenia uniflora, Lippia alba, Lippia microphylla, Mentha x villosa, Ocimum gratissimum e Ocimum selloi. As espécies que apresentaram maior atividade antioxidante, semelhante a quercetina, foram: Spondias mombim, Malphigia glabra, L. alba e Croton zenhtneri,. As plantas Cecropia pachystachia, L. alba, L. microphylla, M. glabra, O. gratissimum e Plectranthus ornatus mostraram maiores halos de inibição da enzima acetilcolinesterase. Combinando as duas ações, as plantas mais ativas foram a M. glabra e a L. alba e somente a segunda correlaciona-se diretamente com o maior teor de fenóis totais. Através deste estudo, M. glabra e L. alba foram consideradas as plantas mais promissoras para estudos subsequentes a fim de encontrar novos compostos com ação potencial contra a doença de Alzheimer. The purpose of this study was to evaluate the phenolic content of 18 medicinal plant extracts of "Live Pharmacies" and correlate them with their free radical scavenging activity and inhibition of the acetylcholinesterase enzyme. Higher amounts of phenolic compounds were found in the following plants: Eugenia uniflora, Lippia alba, Lippia microphylla, Mentha x villosa, Ocimum gatissimum, and Ocimum selloi. The species that showed higher anti-radical activity were Croton zenhtneri, Lippia alba, Malphigia glabra, and Spondias mombim, similar to quercetin. The plants Cecropia pachystachia, L. alba, L. microplylla, M. glabra, O. gratissimum, and Plectranthus ornatus showed larger inhibition zones of the acetylcholinesterase enzyme. By correlating the two actions L. alba and M. glabra are common as more active to both tests and only L. alba correlates directly with the phenolic content. Through this study, L. alba and M. glabra are considered the most promising plants for further studies to find new compounds with potential action against Alzheimer's disease.
- Published
- 2013
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