ESR Spectral Studies on the Free Radical Formed by the Reaction of Dehydroascorbic Acid with Amino Acid

Studies on the Reduction of Dehydroascorbic Acid by Guinea Pig

It has been suggested frequently that one of the functions of ascorbic acid (vitamin C) in the animal organism may be that of a respiratory catalyst (l-6). The factors responsible for the postulated reversible oxidation and reduction of ascorbic acid by animal tissues have been poorly defined, however. Aside from the qualitative observation (1) that ‘(hexuronic acid” slowly reduced cytochrome C...

Human erythrocyte recycling of ascorbic acid: relative contributions from the ascorbate free radical and dehydroascorbic acid.

Recycling of ascorbic acid from its oxidized forms helps to maintain the vitamin in human erythrocytes. To determine the relative contributions of recycling from the ascorbate radical and dehydroascorbic acid, we studied erythrocytes exposed to a trans-membrane oxidant stress from ferricyanide. Ferricyanide was used both to induce oxidant stress across the cell membrane and to quantify ascorbat...

histological evaluation of the effect of three medicaments; trichloracetic acid, formocresol and mineral trioxide aggregate on pulpotomized teeth of dogs

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the role of task-based techniques on the acquisition of english language structures by the intermediate efl students

this study examines the effetivenss of task-based activities in helping students learn english language structures for a better communication. initially, a michigan test was administered to the two groups of 52 students majoring in english at the allameh ghotb -e- ravandi university to ensure their homogeneity. the students scores on the grammar part of this test were also regarded as their pre...

The Chemical Nature of the Rna-amino Acid Compound Formed by Amino Acid-activating Enzymes.