منابع مشابه
Bile Acids and Steroids
In several mammalian species, i.e. rabbit, dog and man, deoxycholic acid is one of the main bile acids in the bile (1). In recent years evidence has accumulated that deoxycholic acid is formed from cholic acid during the enterohepatic circulation by the action of intestinal microorganisms. By the use of 24-@-labeled cholic acid this conversion has been demonstrated in rabbit and in man (2,3). B...
متن کاملSteroids Derived from Bile Acids
Derivatives of bile acids with substituents in Ring C have been described in the preceding papers of this series (l-6). It is the purpose of this paper to assign the probable stereochemical configurations for these compounds. As desoxycholic acid (I)l is a convenient reference compound, it will first be necessary to discuss briefly the spatial arrangement of certain portions of this bile acid. ...
متن کاملMetabolism of steroids: 4. Ketonic acids derived from cholic acid.
acid also increases on storage it is not-yet possible to say in which form the vitamin is primarily synthesized. The nature of the changes underlying the phenomenon is still obscure. The evidence strongly suggests, but does not absolutely prove, that the vitamin is formed from a chemically related precuesor during storage. The increase of vitamin C in an apple of about 22 g. during 7 months of ...
متن کاملContraceptive steroids alter the steady-state kinetics of bile acids.
Contraceptive steroids increase the ratio of cholic acid to chenodeoxycholic acid in bile. This alteration may contribute to the development of cholesterol gallstones. The objective of this study was to measure the effects of contraceptive steroids on bile acid kinetics and to relate them to changes in cholesterol metabolism. Steady-state kinetics of bile acids were measured in 15 healthy women...
متن کاملSports supplements and Anabolic Androgenic Steroids
Recently, the use of sport supplements has become so common among most athletes. These supplements may contain undeclared substances that are banned by such international authorities as WHO, IOC and WADA. The present study, thus, is aimed at examining the final sport supplement products in terms of banned substances and measuring the adulteration level in order to prove the safety of these prod...
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ژورنال
عنوان ژورنال: Nature
سال: 1956
ISSN: 0028-0836,1476-4687
DOI: 10.1038/178763a0