نتایج جستجو برای: isolation and structural elucidation

تعداد نتایج: 16895450  

Journal: :The Journal of antibiotics 1990
K Shin-ya S Imai K Furihata Y Hayakawa Y Kato G D Vanduyne J Clardy H Seto

Active oxygen species cause a variety of diseases such as inflammation, autoimmune disease, diabetes, rheumatism, cardiovascular diseases and cancer-initiation1>2). Thus, it could be expected that antioxidative agents may prevent these diseases. We have screened antioxidants of microbial origin by employing the Yagi method after minor modification using rat liver microsome free from vitamin E3)...

Journal: :Journal of Asian natural products research 2014
Li-Jun Jian Jun-Min Chang Mourboul Ablise Gai-Ru Li Jia-Wei He

The polysaccharide extract (PE) of Uyghur medicinal preparation Alhagi-honey was prepared by water extraction and alcohol precipitation method. The purified polysaccharide AP1-1 was obtained from PE by macroporous adsorption resin chromatography, DEAE cellulose chromatography, and Sephadex gel chromatography; the homogeneity and the molecular weight of AP1-1 were determined by gel filtration; a...

Journal: :The Journal of antibiotics 1993
R J Cannell M J Dawson R S Hale R M Hall D Noble S Lynn N L Taylor

Feeding of fluorinated benzoic acids to fermentations of a Phoma sp. resulted in the biosynthesis of a series of novel fluorinated squalestatins. The feeding studies, isolation, structural elucidation and biological activities of these compounds are reported.

Journal: :Planta medica 2010
Arlene Sy-Cordero Tyler N Graf Yuka Nakanishi Mansukh C Wani Rajesh Agarwal David J Kroll Nicholas H Oberlies

The gram-scale isolation of the major flavonolignan diastereoisomers from milk thistle ( Silybum marianum) extract provided an entree into the isolation of two related analogues that are present in extremely minute quantities. The isolation and structure elucidation of these two new compounds, which we have termed isosilybin C and isosilybin D due to their structural similarities to isosilybin ...

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