نتایج جستجو برای: flavanone

تعداد نتایج: 600  

2006
Julia J. Peterson Johanna T. Dwyer Gary R. Beecher Seema A. Bhagwat Susan E. Gebhardt David B. Haytowitz Joanne M. Holden

Flavanones constitute the majority of flavonoids in citrus fruits such as sweet (Citrus sinensis) and sour oranges (C. aurantium) and their near relatives—tangerines/mandarins (C. reticulata), tangors and tangelos. The relevant chemical analytic literature was searched, abstracted, documented, standardized, examined for quality, enumerated, and summarized in a database for these citrus flavanon...

An efficient cyclization of 2’-hydroxychalcone to flavanone using calcium chloride as a catalyst was developed. The scope of the reaction was studied with substituted 2’-hydroxychalcone and these chalcones was converted into corresponding flavanone in good yield. The merits of this method are inexpensive and easily available catalyst, easy workup procedure, avoid use of toxic solvent

Journal: :Molecules 2004
S Hammami H Ben Jannet A Bergaoui L Ciavatta G Cimino Z Mighri

A flavanone and a flavanone glycoside, together with vomifoliol, have been isolated for the first time from the aerial parts of the plant Echiochilon fruticosum and identified. Their structures were established on the basis of spectroscopic measurements, mainly 2D NMR using COSY, HMQC and HMBC experiments.

2009
Geeta Rani Lalita Yadav S. B. Kalidhar

Phytochemical examination of Citrus sinensis flavedo var. Pineapple resulted in the isolation of six compounds characterized as tetracosane, ethyl pentacosanoate, tetratriacontanoic acid, tangertin, beta-sitosteryl-beta-D-glucoside and 3,5,4'-trihydroxy-7,3'-dimethoxy flavanone 3-O-beta-glucoside. Of these 3,5,4'-trihydroxy-7,3'-dimethoxy flavanone 3-O-beta-glucoside is a hitherto unreported co...

2017
Valentina Spigoni Pedro Mena Federica Fantuzzi Michele Tassotti Furio Brighenti Riccardo C Bonadonna Daniele Del Rio Alessandra Dei Cas

Myeloid angiogenic cells (MACs) play a key role in endothelial repairing processes and functionality but their activity may be impaired by the lipotoxic effects of some molecules like stearic acid (SA). Among the dietary components potentially able to modulate endothelial function in vivo, (poly)phenolic compounds represent serious candidates. Here, we apply a comprehensive multidisciplinary ap...

Journal: :Chirality 2011
Shubao Zhou Yuqiang Zhou Yalan Xing Naixing Wang Linghua Cao

An improved method of the synthesis of flavanones catalyzed by pyrrolidine and BF(3) ·Et(2) O has been developed and a lot of flavanones could be easily synthesized via this method. The asymmetric synthesis of flavanone from benzaldehyde and 5-fluoro-2-hydroxyacetophenone has been studied and flavanone with moderate enantioselectivity was obtained in one step.

Journal: :The British journal of nutrition 2009
Gary M Brett Wendy Hollands Paul W Needs Birgit Teucher Jack R Dainty Barry D Davis Jennifer S Brodbelt Paul A Kroon

Oranges are rich sources of flavonoids that are bioactive and may protect against age-related diseases. The absorption of orange flavanones may be affected by factors such as processing and subject anthropometric variables, and the bioactivity of the absorbed phytochemicals depends on how they are metabolised during absorption. In a randomised cross-over study, twenty subjects consumed a single...

Journal: :Applied and environmental microbiology 2005
Yajun Yan Abhijeet Kohli Mattheos A G Koffas

A four-step flavanone biosynthetic pathway was constructed and introduced into Saccharomyces cerevisiae. The recombinant yeast strain was fed with phenylpropanoid acids and produced the flavanones naringenin and pinocembrin 62 and 22 times more efficiently compared to previously reported recombinant prokaryotic strains. Microbial biosynthesis of the flavanone eriodictyol was also achieved.

Journal: :Chinese Medicine 2009
Fengguo Xu Ying Liu Zunjian Zhang Cheng Yang Yuan Tian

BACKGROUND Da Chengqi Tang (DCT) is a common purgative formula in Chinese medicine. Flavanones are its major active compounds derived from Fructus Aurantii Immaturus. The present study developed an LC-MS/MS method to characterize two pairs of flavanone 7-glycoside isomers, i.e., hesperidin versus neohesperidin and naringin versus isonaringin. METHODS After solid phase purification, components...

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