نتایج جستجو برای: Flavonol glycosides

تعداد نتایج: 10105  

Journal: :Cryobiology 2011
Chikako Kuwabara Jun Kasuga Donghui Wang Yukiharu Fukushi Keita Arakawa Toshie Koyama Takaaki Inada Seizo Fujikawa

Deep supercooling xylem parenchyma cells (XPCs) in Katsura tree contain flavonol glycosides with high supercooling-facilitating capability in solutions containing the ice nucleation bacterium (INB) Erwinia ananas, which is thought to have an important role in deep supercooling of XPCs. The present study, in order to further clarify the roles of these flavonol glycosides in deep supercooling of ...

Journal: :the iranian journal of pharmaceutical research 0
sayyed mustafa ghannadian isfahan pharmaceutical sciences research center, isfahan university of medical sciences, isfahan, iran.sfahan pharmaceutical sciences research center, isfahan university of medical sciences, isfahan, iran. abdul majid ayatollahi school of pharmacy and phytochemistry research centre, shahid beheshti university of medical sciences, tehran, iran. suleiman afsharypour faculty of pharmacy and pharmaceutical sciences, isfahan university of medical sciences, isfahan, iran. sumaira hareem dr. panjwani center for molecular medicine and drug research, sciences, university of karachi, karachi-75270, pakistan. omer mohamed abdalla dr. panjwani center for molecular medicine and drug research, sciences, university of karachi, karachi-75270, pakistan. jean jules kezetas bankeu department of organic chemistry, faculty of science, twas research unit of university of yaounde i; yaounde, cameroon

four known flavonoids: quercetin 3-o-β-d-rutinoside (q3rut), myricetin 3-o-β-d-galactopyranoside (m3gal), quercetin 3-o-β-d-galactopyranoside (q3gal) and quercetin 3-o-β-d-glucopyranoside (q3glc), for the first time were isolated from aerial parts of euphorbia microsciadia. the chemical structure of them was elucidated on the basis of 1 and 2 d-nmr spectra and different spectroscopic techniques...

Journal: :The Analyst 2005
Changqing Liu Rupasri Mandal Xing-Fang Li

We report here a negative ionization nanoelectrospray ionization mass spectrometry (nanoESI-MS) technique that simultaneously detects active components, terpenes and intact flavonol glycosides, and toxic ginkgolic acids in ginkgo products. Unlike the conventional methods that hydrolyze flavonol glycosides to flavonoids for analysis, this technique directly detects intact flavonol glycosides, en...

Journal: :Chemical & pharmaceutical bulletin 2002
Nobuo Kawahara Motoyoshi Satake Yukihiro Goda

A new acylated flavonol glycoside was isolated from the leaves of Eriobotrya japonica along with two known flavonol glycosides. Their structures were determined by extensive spectroscopic investigation.

2016
Brasathe Jeganathan P A Nimal Punyasiri J Dananjaya Kottawa-Arachchi Mahasen A B Ranatunga I Sarath B Abeysinghe M T Kumudini Gunasekare B M Ratnayake Bandara

Flavonol glycosides in tea leaves have been quantified as aglycones, quercetin, myricetin, and kaempferol. Occurrence of the said compounds was reported in fruits and vegetable for a long time in association with the antioxidant potential. However, data on flavonols in tea were scanty and, hence, this study aims to envisage the flavonol content in a representative pool of accessions present in ...

Journal: :Bioscience, biotechnology, and biochemistry 2006
Ken-Ichi Onodera Kaoru Hanashiro Takeshi Yasumoto

A novel flavonol glycoside named camellianoside and three known flavonol glycosides were isolated from the leaves of Camellia japonica. The structure of camellianoside was established as quercetin-3-O-beta-D-xylopyranosyl-(1-->3)-O-alpha-L-rhamnopyranosyl-(1-->6)-O-beta-D-glucopyranoside by spectroscopic and chemical methods. The antioxidant activities of these glycosides evaluated by the diphe...

Journal: :Molecules 2015
Yan-Jie Huang Ling-Yun Zhou Jun-Min Wang Qiang Li Yuan-Yuan Geng Hai-Yang Liu Yan Hua

Two new flavonol glycosides, named polygalin H (1) and polygalin I (2), as well as the known compound polygalin D (3), were isolated from the whole plant of Polygala sibirica L. var megalopha Fr. Their structures were elucidated on the basis of spectroscopic data analysis. These flavonol glycosides exhibited strong inhibitory activities against xanthine oxidase in vitro. Their half-maximal inhi...

Journal: :Journal Of The Brazilian Chemical Society 1996

2013
Kazu Kurosawa

Four kaempferol glycosides and five quercetin glycosides have been isolated from a methanolic extract of Paederia scandens var. mairei leaves and stems, in which in addition four un­ known glycosides of kaempferol and quercetin are present in a trace. Nine flavonol glycosides including a new glycoside quercetin 3-0-rutinoside-7-0-xylosylglucoside (paederinin) were identified by PC, HPLC, UV spe...

Journal: :Chemical and Pharmaceutical Bulletin 2011

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