There is a considerable body of biological data linking testosterone and other 19-carbon steroids with the estrogens. Both ovaries and testes may, under certain circumstances, produce androgens and estrogens (14). The administration of testosterone and other androgens to human subjects leads to an increased urinary excretion of estrogenic material (5-lo), which has been identified as estrone, e...

Article history: Received 22 February 2012 Available online 30 May 2013 JEL classification: D83 C91 C14

BACKGROUND The aim of the present study was to establish a non-invasive, fast and robust enzymatic assay to confirm fatty acid oxidation defects (FAOD) in humans following informative newborn-screening or for selective screening of patients suspected to suffer from FAOD. MATERIAL/METHODS The reliability of this method was tested in whole blood from FAOD patients with specific enzymatic defect...

There are two known mechanisms of synthesis of phosphopyruvate in animal tissues. One of these is direct phosphorylation of pyruvate by adenosine 5’(pyro)-triphosphate, catalyzed by pyruvate kinase, and the other phosphorylative decarboxylation of oxaloacetate in the presence of inosine triphosphate and phosphoenolpyruvate carboxykinase. Present evidence has been interpreted as suggesting that ...

An experiment was conducted to determine fatty acid (FA) pro?les in Chinese Maiwa yak milk across the lactation cycle. Sixty-one healthy, similar weight, 4-7 years old, 3-6 parity yaks with unrelated background were selected randomly from Hongyuan County, Sichuan province, southwest of China (with altitude over 3500 m). The graze on natural pasture all year around without irrigation, fertilizer...

It is known that oxalic acid is a product of ascorbic acid metabolism in the guinea pig (1) and rat (2), and is formed in man from unidentified precursors (3). Oxalates are also of interest because of their occasional toxicity and unexplained deposition. Ascorbic, dehydroascorbic, and 2,3diketogulonic acids are known to give rise to oxalic and threonic acids in approximately quantitative yields...