abstract: Ascorbic acid (Vitamin C) is an essential Vitamin which participates in many different biological processes. The ascorbic acid content in vegetables and fruits is a maturity index and its determination in such samples is of special interest in quality control. In this paper we present a titrimetric method with potassium bromide for the determination of ascorbic acid in walnut, cabbage...

Studies were conducted to evaluate the blood levels of ascorbic acid, dehydroascorbic acid, glutathione, and histamine in patients with gastric carcinoma, tuberculous enteritis and non-specific ulcerative colitis. Leucocyte ascorbic acid, urinary excretion of total ascorbic acid and ascorbic acid saturation test were also carried out in order to assess the ascorbic acid status of these patients...

the production of oxygen radicals in plants under salinity stress conditions in an the important factor for a diminishing of a photosynthesis and a cause fir a decrease in later vegetative growth. in order to study the effects of antioxidants and salinity stress on photosynthetic characteristics and growth in olive, an experiment was conducted in the research greenhouse of tabriz university in ...

The present paper deals with the effect of endosulfan on Ascorbic acid content in the alimentary canal of Heteropneustes fossilis. This fish exposed so sub lethal concentration of endosulfan for a period of one month. The results revealed that the ascorbic acid content of alimentary canal was decreased in intoxicated fishes.

Endoplasmic reticulum (ER) thiol oxidases initiate a disulfide relay to oxidatively fold secreted proteins. We found that combined loss-of-function mutations in genes encoding the ER thiol oxidases ERO1α, ERO1β, and PRDX4 compromised the extracellular matrix in mice and interfered with the intracellular maturation of procollagen. These severe abnormalities were associated with an unexpectedly m...

The instability of ascorbic acid in weakly acid solutions has recently been shown to be due to the copper content of the solutions (1). By strict elimination of copper, solutions of ascorbic acid are stable below pH 7.6. The preparation of copper-free reagents, however, is not very practical and in analytical procedures would not eliminate copper contamination from the materials analyzed. The u...

BACKGROUND Ascorbic acid is a potent antioxidant and is involved in many metabolic activities including collagen biosynthesis. In the present investigation, ascorbic acid and lipid peroxides were monitored in the blood and liver samples during the progression of experimentally induced hepatic fibrosis. METHODS Liver injury was induced by intraperitoneal injections of dimethylnitrosamine (DMN)...

introduction : pistachio (pistaciavera l.) is a tasty nut and a good source of nutrients. ithas a high content of numerous beneficial nutritive and bioactive compounds such as proteins, carbohydrate, moisture, vitamins, minerals, fiber and other micronutrients compounds, but the most exceptional components are the amount of fats and especially unsaturated fatty acids. therefore, this nut is hig...