Results 41 to 50 of about 27,133 (167)
Frontiers in Plant Science, 2019 The evolution of flavonoids under altered temperature and light conditions in the fruit zone was followed in Cabernet Sauvignon (Vitis vinifera L.) grapes during ripening.
Erna H. Blancquaert +3 more
doaj +1 more source
Antioxidative Flavonol Glucuronides and Anti-HBsAg Flavonol from Rotala rotundifolia
Journal of Traditional and Complementary Medicine, 2011 Two new flavonol glucuronides, quercetin 3-O-β-D-2″-acetylglucuronide (1) and quercetin 3-O-β-D-2″-acetylglucuronide methyl ester (2), along with four known flavonoids (3-6) were isolated from the whole parts of Rotala rotundifolia. The structures of 1 and 2 were elucidated by application of various spectroscopic methods, including 1D and 2D NMR ...
Li-Jie Zhang +4 more
openaire +3 more sources
Antioxidants, 2013 This paper summarizes the information on the occurrence of phenolic compounds in apple (Malus x domestica Borkh.) fruit and juice, with special reference to their health related properties. As phytochemical molecules belonging to polyphenols are numerous,
Alessandra Francini, Luca Sebastiani
doaj +1 more source
Frontiers in Plant Science, 2017 Flavonols constitute a group of flavonoids with important photoprotective roles in plants. In addition, flavonol content and composition greatly influences fruit quality.
Stefan Czemmel +10 more
doaj +1 more source
Synthesis of novel fluorinated flavonols via Algar-Flynn-Oyamada reaction
Vietnam Journal of Science, Technology and EngineeringFlavonols have attracted considerable attention due to their diverse biological effects. However, naturally occurring flavonols are typically present only in low concentrations, with fluorine-containing flavonols being especially rare.
Le Thanh Huy +4 more
doaj
The efficiency of flavonols in the setting of experimentally induced allergic asthma
Revista Alergia México, 2018 Objective: Our objective in this study was to evaluate and compare the therapeutic potency (bronchodilation, action on ciliary beat frequency, anti-inflammatory, anti-remodelling effect) of a different flavonol derivates: quercetin, fisetin and morin in ...
Sona Fraková
doaj
Frontiers in Plant Science, 2018 The old observation that plants preferentially synthesize flavonoids with respect to the wide range of phenylpropanoid structures when exposed to high doses of UV-B radiation has supported the view that flavonoids are primarily involved in absorbing the ...
Cecilia Brunetti +5 more
doaj +1 more source
Synthesis of a library of glycosylated flavonols
Tetrahedron Letters, 2008 Flavonols are an important class of natural products isolated from plants. Some glycosylated flavonols showed very interesting biological activities. A library of flavonols has been made through Algar-Flynn-Oyamada reaction from 2'-hydroxyacetophenones and benzaldehydes. Glycosylation of these flavonols with various glycosyl donors affords a library of
Li, Zhitao +7 more
openaire +2 more sources
Determination of flavonols and phenolic acids in Puearia lobata (Kudzu) root by HPLC-PDA method
Current Issues in Pharmacy and Medical Sciences, 2012 Phenolic acids and derivatives of quercetin in Kudzu root were determined by high-performance liquid chromatography with diode array detector. The calibration curves were constructed using phenolic compounds standards (the coefficient of determination ...
Anna Filipiak-Szok +3 more
doaj +1 more source
Antioxidant flavonols from fruits, vegetables and beverages: measurements and bioavailability
Biological Research, 2000 Flavonols are polyphenolic secondary plant metabolites that are present in varying levels in commonly consumed fruits, vegetables and beverages. Flavonols have long held an interest for nutritionists, which has increased following a Dutch study in the ...
ALAN CROZIER +7 more
doaj