A Conversion of D-Glucose to D-Mannose Under Acidic Conditions.
نویسندگان
چکیده
منابع مشابه
Enzymatic conversion of D-glucose to D-fructose.
days against EDTA. Assuming a molecular weight for the virus of 50 x 106, calculation of the number of atoms of iron, copper, calcium, and magnesium per virus particle gave values of 20, 3, 52, and 45, respectively. The fact that iron and magnesium were concentrated approximately 20-fold in the virus ribonucleic acid compared with the occurrence of about 5 percent nucleic acid in the virus indi...
متن کاملD-mannose as a preservative of glucose in blood samples.
We studied the changes in blood glucose concentration in blood samples collected in heparinized specimen tubes containing no other preservative, or containing NaF, D-mannose, or a combination of NaF and D-mannose. Blood concentration in samples taken into NaF decreased by 0.40 mmol/L in the first 2 h; thereafter, there was no change. In samples collected into mannose there was a small but signi...
متن کاملThe conversion of D-glucose to 5-keto-6-deoxy-D-arabohexose.
Hygromycin A is interesting from the standpoint of the previously undescribed sugar it contains, 5-keto-6-deoxy-n-arabohexose (2,3). The pathway of biosynthesis of this compound is unknown. In this study, Streptomyces hygroscopicus was grown in the presence of specifically labeled glucose, and the distribution of radioactivity in the 5-keto-6-deoxy-n-arabohexose of hygromycin A was determined. ...
متن کاملReactions of Saccharides Catalyzed by Molybdate Ions. II.* Epimerization of D-Glucose and D-Mannose
In acidified water solutions of molybdate, aldoses epimerize under the formation of equilibrium mixtures in which the epimer having trans relationship of the hydroxyl groups at C-2 and C-3 predominates. The epimerization of both D-glucose and D-mannose gives the equilibrium mixture of D-glucose and D-mannose in the ratio 75 25. A tentative mechanism for this reaction is suggested and the prepar...
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 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: Acta Chemica Scandinavica
سال: 1963
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.17-2769b