Search

Your search keyword '"Flamini, Guido"' showing total 1,481 results
Start Over Author "Flamini, Guido"
1,481 results on '"Flamini, Guido"'

26. Headspace analysis of volatiles from commercial seeds of Trigonella foenum-graecum L. obtained from four Middle Eastern countries.

Author

Alqathama, Aljawharah, Bader, Ammar, Pieracci, Ylenia, Ahmad, Rizwan, Ascrizzi, Roberta, and Flamini, Guido

Subjects
MULTIVARIATE analysis, CULTIVATED plants, MEDICINAL plants, PHENYLPROPANOIDS, CUMIN, FENUGREEK
Abstract

Trigonella foenum-graecum L. commonly known as fenugreek, is an important economic and medicinal plant cultivated in various regions of the world. Fenugreek produces several important active chemical constituents that determine its pharmacological properties. The aim of this research was to analyze the volatile constituents spontaneously emitted by eight samples of fenugreek seeds purchased from different Middle Eastern drugstores, including Saudi Arabia, Yemen, Egypt, and Iran. A total of 70 constituents belonging to different chemical classes, including monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpene hydrocarbons, phenylpropanoids, apocarotenes, nitrogen/sulfur derivatives, and non-terpene derivatives, were characterized in the volatile emissions of the eight samples, some components with significant olfactory properties were detected such as γ-nonalactone, cumin aldehyde, (E)-cinnamaldehyde, p-anisaldehyde, and eugenol. PCA showed two macro-clusters; the first comprised two sub-groups, while the second included only Yemeni samples. The findings of this study demonstrate that the significant variation for volatile profiles in fenugreek samples which are prone to variations in the geographical origin of these samples. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

39. Headspace analysis of volatiles from commercial seeds of Trigonella foenum-graecumL. obtained from four Middle Eastern countries

Author

Alqathama, Aljawharah, Bader, Ammar, Pieracci, Ylenia, Ahmad, Rizwan, Ascrizzi, Roberta, and Flamini, Guido

Abstract

ABSTRACTTrigonella foenum-graecumL. commonly known as fenugreek, is an important economic and medicinal plant cultivated in various regions of the world. Fenugreek produces several important active chemical constituents that determine its pharmacological properties. The aim of this research was to analyze the volatile constituents spontaneously emitted by eight samples of fenugreek seeds purchased from different Middle Eastern drugstores, including Saudi Arabia, Yemen, Egypt, and Iran. A total of 70 constituents belonging to different chemical classes, including monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpene hydrocarbons, phenylpropanoids, apocarotenes, nitrogen/sulfur derivatives, and non-terpene derivatives, were characterized in the volatile emissions of the eight samples, some components with significant olfactory properties were detected such as γ-nonalactone, cumin aldehyde, (E)-cinnamaldehyde, p-anisaldehyde, and eugenol. PCA showed two macro-clusters; the first comprised two sub-groups, while the second included only Yemeni samples. The findings of this study demonstrate that the significant variation for volatile profiles in fenugreek samples which are prone to variations in the geographical origin of these samples.

Published
2024
Full Text
View/download PDF

41. Towards Sulphite-Free Winemaking: A New Horizon of Vinification and Maturation.

Author

Mercanti, Nicola, Macaluso, Monica, Pieracci, Ylenia, Flamini, Guido, Scappaticci, Giulio, Marianelli, Andrea, and Zinnai, Angela

Subjects
SULFUR dioxide, PLANT extracts, PHENOLS, LANDSCAPING industry, SULFITES, FOOD preservatives
Abstract

The complex dynamics between oxygen exposure, sulphur dioxide (SO2) utilization, and wine quality are of the utmost importance in wine sector, and this study aims to explore their fine balance in winemaking. As a common additive, SO2 works as an antiseptic and antioxidant. However, its excessive use has raised health concerns. Regulatory guidelines, including Council Regulation (EC) N° 1493/1999 and Commission Regulation (EC) No 1622/2000, dictate SO2 concentrations in wines. The increasing demand for natural preservatives is driving the search for alternatives, with natural plant extracts, rich in phenolic compounds, emerging as promising substitutes. In this context, Bioma Company has proposed alternative additives deriving from vineyard waste to replace SO2 during winemaking. Thus, the aim of the present work was to compare the compositional characteristics between the product obtained with the alternative vinification and the traditional one during the winemaking, as well as the aroma compositions of the final wines. After a year of experimentation, the wines produced with Bioma products showed compositional characteristics comparable to their traditional counterparts. Notably, these wines comply with current legislation, with significantly reduced total sulphur content, allowing their designation as "without added sulphites". Bioma products emerge as potential catalysts for sustainable and health-conscious winemaking practices, reshaping the landscape of the industry. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

42. Profiles of the Headspace Volatile Organic and Essential Oil Compounds from the Tunisian Cardaria draba (L.) Desv. and Its Leaf and Stem Epidermal Micromorphology.

Author

Saadellaoui, Wissal, Kahlaoui, Samiha, Hcini, Kheiria, Haddada, Abir, Sleimi, Noomene, Ascrizzi, Roberta, Flamini, Guido, Harzallah-Skhiri, Fethia, and Stambouli-Essassi, Sondes

Subjects
VOLATILE organic compounds, ESSENTIAL oils, ALDEHYDES, LACTONES, HYDROCARBONS
Abstract

In this work, we investigated aroma volatiles emanated by dry roots, stems, leaves, flowers, and fruits of Cardaria draba (L.) Desv. growing wild in Tunisia and its aerial part essential oils (EOs) composition. A total of 37 volatile organic compounds (96.7%-98.9%) were identified; 4 esters, 4 alcohols, 7 hydrocarbons, 12 aldehydes, 5 ketones, 1 lactone, 1 organosulfur compound, 2 organonitrogen compounds, and 1 acid. The hydrocarbons form the main group, representing 49.5%-84.6% of the total detected volatiles. The main constituent was 2,2,4,6,6-pentamethylheptane (44.5%-76.2%) reaching the highest relative percentages. Forty-two compounds were determined in the two fractions of EOs, representing 98.8% and 97.2% of the total oil composition, respectively. The principal components were hexadecanoic acid (34.6%), 6-methyl-5-hepten-2-one (18.3%), decanal (15.0%), 6,10,14-trimethyl2-pentadecanone (13.2%), and n-pentacosane (13%). Micromorphological details of the leaf and stem epidermis using light microscopy revealed polygonal cells with sinuous walls in the adaxial and abaxial leaf surfaces and nearly rectangular and long ones with linear and thick walls for the stem epidermis. The stomata complexes were anisocytic in the leaf epidermis and mainly anisocytic and rarely paracytic in the stem epidermis. Non-glandular trichomes were unbranched and long with an acute apex or short with a convex apex. The glandular ones were identified for the first time in this species. They were short-stalked with a large secretory head. The highest stomatal index (17.02%) was recorded in the abaxial leaf surface. The identification of headspace volatiles and essential oil compounds can be used to characterize this species, and the various epidermis micromorphological features are very useful for biosystematics taxonomic studies within Brassicaceae. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

45. Chemical Composition and Antimicrobial Activity against the Listeria monocytogenes of Essential Oils from Seven Salvia species

Author

Bozzini, Maria Francesca, primary, Pieracci, Ylenia, additional, Ascrizzi, Roberta, additional, Najar, Basma, additional, D’Antraccoli, Marco, additional, Ciampi, Luca, additional, Peruzzi, Lorenzo, additional, Turchi, Barbara, additional, Pedonese, Francesca, additional, Alleva, Alice, additional, Flamini, Guido, additional, and Fratini, Filippo, additional

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results