The oxidation of ascorbic acid was dependent on the concentration of linoleic acid, ascorbic acid and the enzyme. The optimal conditions to observe maximal enzyme velocity included the presence of 800 microM linoleic acid, 500 microM ascorbic acid and 25 nM soybean lipoxygenase in 50 mM Tris ...
Butcher RG, Chayen J: Oxidation of L-ascorbic acid by cells of carcinoma of the human cervix. Nature 1965, 207:992-993.Butcher RG, Chayen J. Oxidation of L-ascorbic acid by cells of carcinoma of the human cervix. Nature. 1965; 207 :992–993....
however, disagreement as to whether the oxidase activity is exerted by this complex, or by the ionized copper from it. Active preparations of artificial oxidases, with ionic copper as the responsible constituent, have been
L. (1979). Oxidation of L-ascorbic acid by hydrogen peroxide: preparation of L-threonic acid. Carbohydrate Research, 72, 301±304.H.S. Isbell, H.L. Frush, Oxidation of L-ascorbic acid by hydrogen peroxide: preparation of L-threonic acid, Carbohydr. Res. 72 (1979) 301-304....
Determination of ascorbic acid and dehydroascorbic acid in biological samples by high-performance liquid chromatography using subtraction methods: reliable... Determination of dehydroascorbic acid in biological samples most commonly involves indirect measurement. The concentration is calculated by subtraction of ...
specific-cation medium effects in the oxidation of ascorbic acid by hexachloroiridate(iv) and hexabromoiridate(iv)doi:10.1002/chin.198315153W. D. DRURYJ. M. DEKORTEJohn Wiley & Sons, LtdChemischer InformationsdienstW. D. Drury and J. M. De Korte, Inorg. Chem. , 22 , 121 (1983)....
Use of a lithium doped Bismuth oxide and MWCNT modified glassy carbon electrode (Bi2O3/Li+/CNT/GC) enhance the oxidation current of ascorbic acid during cyclic voltammetry compared to bare GC and (Bi2O3 /Li+/ CNT) modified electrode. Peak potential was observed to shift slightly to less ...
The kinetics of the oxidation of ascorbic acid by the copper(II) ion has been studied spectrophotometrically by a stopped-flow technique. At pH 4–6, the initial rate of the decrease in the monohydroascorbate anion is of the second-order with respect to the total concentration of the copper...
Copper-catalyzed oxidation of ascorbic acid was retarded in the presence of the biological disulfide compounds cystine and oxidized glutathione. The evidence suggested that this effect was due to the formation of a stable complex involving the copper ion, the disulfide compound, and ascorbic acid or...
The measurement of the oxidation-reduction potential of ascorbic acid (Vitamin C) is desirable in the elucidation of its physiological action. Two attempts have been made to measure this potential. Georgescu(1) concluded that he had obtained a thermodynamically reversible potential at pH 6.9, and ...