HUMULINIC ACIDS. VIII. STEREOISOMERS OF HUMULINIC ACIDS
نویسندگان
چکیده
منابع مشابه
Biotin-like activity of positional and stereoisomers of octadecenoic acids.
A number of microorganisms have been investigated which require some particular fatty acid in addition to biotin as a growth factor (l-6). On the other hand, a large group of organisms are able to utilize certain fatty acids in place of biotin in the medium (7-11). Axelrod and coworkers (12, 13) reported that the saponifiable fraction from blood plasma possesses high biotin activity. This extra...
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Capillary gas-liquid chromatographic separation was studied for the complete set of the 26 theoretically possible isomers of mono-, di-, and trihydroxylated 5 beta-cholanic acids, which differ from one another in the number, position, and configuration of hydroxyl groups at C-3, C-7, and/or C-12 in the nucleus, as well as for some of their related acids. The bile acid samples were chromatograph...
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The diastereo- and enantioselective microbial oxidation of a mixture of racemic cis/trans-chrysanthemols to the corresponding stereoisomeric chrysanthemic acids by Aspergillus species is described. Of the three microorganisms which were found capable of oxidizing racemic cis/trans-chrysanthemols, A. ochraceus ATCC 18500 showed complete enantioselectivity for (+)-stereoisomers [(+)-trans-chrysan...
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A mixture of manganese, cobalt and lead para-amino benzoates supported on silica gel is used to catalyze oxidation of xylenes to toluic acids in presence of oxygen or air. Reactions are clean and catalysts can be recovered easily and reused.
متن کاملDetermination of Tocopherols and Fatty Acids in Seeds of
Background: The dried fruits of Silybum marianum (L.) Gaertn (Compositae) contain silymarin, an isomeric mixture of flavonolignans. Silymarin acts as a strong anti -hepatotoxic. This fruits contains a high amount of oil . Objective: The objective of this study was to determine total lipid content, fatty acid composition and content of different kind of tocopherols in seed oils of S. marianum...
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ژورنال
عنوان ژورنال: Journal of the Institute of Brewing
سال: 1969
ISSN: 0046-9750
DOI: 10.1002/j.2050-0416.1969.tb03232.x