منابع مشابه
Metabolism of L-ascorbic acid-1-C14 in man.
n-Ascorbic acid labeled with Cl4 has been utilized in studying the metabolism of this vitamin in rats (1, 2) and guinea pigs (3, 4). In both species there is considerable conversion of carboxyl-labeled n-ascorbic acid to CO2 and significant urinary excretion of labeled oxalate. The important nutritional role of n-ascorbic acid made it desirable to study the metabolism of the labeled vitamin in ...
متن کاملPreparation of 1-C14-propene-1 and the mechanism of permanganate oxidation of propene.
. l-C14_propene~1 has been prepared. The migration of the double bond under a variety of experimental conditions in the preparation of propene has been investigated. 'rhe mechanism of the permanganate oxidation of the labelled propene has been examined; it has been found to proceed by several paths, the relative importance of which depends upon the experimental conditions .. especia lly the pH....
متن کاملSynthesis of D-Glucose-1-C14 and D-Mannose-1-C14
Heretofore, radiochemical yields of sugars position-labeled with carbon-14 have been only 5 to 10 percent. This paper reports an improved cyanohydrin synthesis, and the preparation of D-glucose-1-C and D-mannose-1-C from D-arabinose in yields of about 50 percent. Low yields in prior syntheses appear to have been due to several inefficient steps, and to the fact that extension of the carbon chai...
متن کاملOne-step preparation of C14-cyanide from barium carbonate-C14.
News and Notes Eighth Annual Calorimetry Conference; Symposium on the Role of Proteins in Ion Transport Across Membranes.. 710 Technical Papers One-Step Preparation of C14-Cyanide from Barium Carbonate-C14: J. K. Jeanes .719 Evaluation of Oral Temperature Readings: Francis L. Harmon.. 719 Use of the Thymus Gland in Chicks to Elucidate Interrelationships Between Pteroylglutamic Acid and Biologic...
متن کاملEnzymic preparation of the 1,L-diastereoisomer of tetrahydrofolic acid.
hydrogenation of folic acid in an acidic or neutral medium (Z-5)) and this process, involving a reduction of the pyrazine ring, introduces a second asymmetric center1 (at carbon 6) into the molecule. Since chemically synthesized tetrahydrofolate is a &mixture with reference to this center, only 50 To of the material is utilized in reactions in which it serves as a coenzyme (7-10). Accordingly, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 1951
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja01156a002