Results 21 to 30 of about 150,604 (192)

Metabolism of quercetin and kaempferol by rat hepatocytes and identification of flavonoid glycosides in plasma

, 2002
The metabolism of the flavonoids quercetin and kaempferol by rat hepatocytes was investigated using liquid chromatography coupled with electrospray mass spectrometry (LC-ESI MS). Quercetin and kaempferol were extensively metabolized (98.8 +/- 0.1% and 81.
Oliveira, E.D.J., Grant, M.H., Watson, D.G., M. H. Grant, D. G. Watson, E. J. Oliveira   +5 more
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Research on flavonoid glycosides of tea flower in different tea plant cultivars

浙江大学学报. 农业与生命科学版, 2019
Twelve different flavonoid glycosides were identified and quantified by ultra-high performance liquid chromatography-mass spectrometry (UHPLC-MS) method from tea flower of five different tea plant cultivars (Meizhan, Shuigu, Huangyezao, Zhenghe Dabai ...
LI Jin, CHEN Lianfu, KIM Eunhye, LI Bo, TU Youying   +4 more
doaj   +1 more source

Biochemical and molecular characterization of a flavonoid 3-O-glycosyltransferase responsible for anthocyanins and flavonols biosynthesis in Freesia hybrida

Frontiers in Plant Science, 2016
The glycosylation of flavonoids increases their solubility and stability in plants. Flowers accumulate anthocyanidin and flavonol glycosides which are synthesized by UDP-sugar flavonoid glycosyltransferases (UFGTs).
Wei eSun, Wei eSun, Lingjie eLiang, Xiangyu eMeng, Yueqing eLi, Fengzhan eGao, Xingxue eLiu, Shucai eWang, Xiang eGao, Xiang eGao, Li eWang   +10 more
doaj   +1 more source

Blue Light Treatment but Not Green Light Treatment After Pre-exposure to UV-B Stabilizes Flavonoid Glycoside Changes and Corresponding Biological Effects in Three Different Brassicaceae Sprouts

Frontiers in Plant Science, 2021
Ultraviolet-B (UV-B; 280–315 nm) radiation induces the biosynthesis of secondary plant metabolites such as flavonoids. Flavonoids could also be enhanced by blue (420–490 nm) or green (490–585 nm) light.
Susanne Neugart, Petra Majer, Monika Schreiner, Éva Hideg   +3 more
doaj   +1 more source

A Glycosynthase Catalyst for the Synthesis of Flavonoid Glycosides

Angewandte Chemie International Edition, 2007
Glycosylation of lipophilic small molecules is one of the predominant strategies by which the bioactivity of these compounds is modulated in living organisms. Indeed, even simple plants, such as Arabidopsis thaliana, dedicate over 120 open reading frames encoding many activated sugar-dependent glycosyltransferases to this task alone.
Yang, M, Davies, G, Davis, B
openaire   +2 more sources

Facile Synthesis of Flavonoid 7-O-Glycosides

, 2016
Highly regioselective removal of the 7-O-acyl groups of the peracylated flavones, isoflavones, and flavonols (PhSH, imidazole, NMP) followed by effective glycosylation with glycosyl trifluoroacetimidates (BF3·Et2O) and cautious deprotection of the acyl ...
Biao Yu (1466188), Xiuwen Han (1660885), Ming Li (91180)   +2 more
core   +1 more source

Identification of a flavonoid C-glycosyltransferase from fern species Stenoloma chusanum and the application in synthesizing flavonoid C-glycosides in Escherichia coli

Microbial Cell Factories, 2022
Background Flavonoid C-glycosides have many beneficial effects and are widely used in food and medicine. However, plants contain a limited number of flavonoid C-glycosides, and it is challenging to create these substances chemically.
Rong Ni, Xin-Yan Liu, Jiao-Zhen Zhang, Jie Fu, Hui Tan, Ting-Ting Zhu, Jing Zhang, Hai-Long Wang, Hong-Xiang Lou, Ai-Xia Cheng   +9 more
doaj   +1 more source

New Flavonoid Glycosides and Cyanogenic Glycosides from Dracocephalum peregrinum

Chemical and Pharmaceutical Bulletin, 2009
Separation of ethyl acetate fractionation of Dracocephalum peregrinum afforded three new flavonoid glucosides (1-3), and a new cyanogenic glucoside (4). Their structures were elucidated based on HR-electron spray ionization (ESI)-MS, EI-MS, UV, IR, 1D-, and 2D-NMR data. 1-4 were tested in vitro for their antiinflammatory activity against the RAW 264.7,
Fu, Peng, Zhao, Chun-Chao, Tang, Jian, Shen, Yun-Heng, Xu, Xi-ke, Zhang, Wei-Dong   +5 more
openaire   +3 more sources

In Vitro and In Silico Analyses Explore the Role of Flavonoid Classes in the Antiviral Activity of Plant Extracts Against the Dengue Virus

Molecules
This study examined the relationship between flavonoid content and the antiviral effects of plant extracts against the dengue virus (DENV). Fourteen extracts from medicinal plants cultivated in Colombia, which were prepared by ultrasonic-assisted solvent
Sindi A. Velandia, Elena E. Stashenko, Elizabeth Quintero-Rueda, Sergio Conde-Ocazionez, Lady J. Sierra, Raquel E. Ocazionez   +5 more
doaj   +1 more source

Steroidal Glycosides of Cordyline australis [PDF]

, 2006
The n-butanol extract of aerial parts of Cordyline australis demonstrated antifungal activity. n-Butanol and chloroform extracts of dried or fresh leaves of C. australis afforded a steroidal glycoside, which was identified as 5α-spirost-25(27)-en-3β-ol 3-
Korkashvili, Tamar
core