A-Ascorbic acid

A. Ascorbic acid (vitamin C) reacts with If according to the equation... 

Fig. 9.5 Chemical structures of low molecular weight antioxidants Melatonin (a) ascorbic acid (Vitamin C) (b) glutathione (c) lipoic acid (d) a-tocopherol (Vitamin E) (e) and a-tocotrienol (f)...

Figure 3. Current response of a poly(l,2-diaminobenzene)-coated electrode to hydrogen peroxide (a), ascorbic acid (b), uric acid (c), cysteine (d), and control human serum (e). Flow injection amperometric operation. (Reproduced from ref. 18. Copyright 1990 American Chemical Society.)...

Netke SP, Roomi MW, Tsao C, Niedzwiecki A Ascorbic acid protects guinea pigs from acute aflatoxin toxicity. Toxicol Appl Pharmacol 1997 143 429—435. 

Note Data are expressed as a percentage of value for animals consuming a control diet containing 6 ppm Cu. A A = ascorbic acid. 

Kimura, K. and Sidhu, A., Ascorbic acid inhibits 125I-SCH 23982 binding but increases the affinity of dopamine for D1 dopamine receptors,. Neurochem., 63[6], 2093, 1994. 

C14. Collins, M., and Elvehjem, C. A., Ascorbic acid requirement of the guinea pig using growth and tissue ascorbic acid concentrations as criteria. /. Nutrition 64, 503-511 (1958). 

Figure 3.17 TG curves for (a) ascorbic acid, (b) magnesium stearate, and (c) ascorbic acid/ magnesium stearate binary mixture.

Park, C. H., Bergsagei. 0. E.. and McCulloch, E. A. Ascorbic acid a culture requirement for colony formation by mouse plasmacytoma cells. Science. 174 720-722.1971. 

Glutathione-ascorbic acid respiratory chain GSH -yascorSacid (phorpft " NADPH AgsSG A ascorbic acid... 

A Ascorbic acid (vitamin C), along with having many other reputed properties, acts as an antioxidant. The following equation illustrates its antioxidant properties. 

Thomas LD, Blinder CG, Tiselius HG, Wolk A, Akesson A. Ascorbic acid supplements and kidney stone incidence among men a prospective study. JAMA Intern Med March 11,2013 173(5) 386-8. 

The health imparting qualities of milk are indicated by the fact that daily consumption of a quart (950 ml) of cow s milk furnishes an average adult approximately all the fat, calcium, phosphorus, and riboflavin 1/2 the protein 1/3 of the vitamin A, ascorbic acid, and thiamin 1/4 of the calories and, with the exception of iron, copper, manganese, and magnesium, all the minerals needed daily. These and other nutritional and health benefits of milk are detailed under two earlier headings of this section entitled "Nutrients of Milk" and "Milk as a Food" hence, the reader is referred thereto. 

Figure 1. Some quality parameters for clarified orange juice concentrate stored at 25 C ( ) 5 C (O). (A) ascorbic acid (B) furfural (C) HMF (D) browning index.

Food is frequently subject to oxidative degradation and spoilage. Especially, fats with unsaturated fatty acids can get rancid. Radical scavengers are the most effective a. - Ascorbic acid and its salts, iso-ascorbic acid, gallates (gallic acid) and - toco-pherols are used as well as some petrochemical-based products. 

BDD MDA electrodes are useful for electrochemical detection of various biologically and environmentally important chemical species with high sensitivity and stability. Sigmoidal voltammograms could be obtained for (A) ascorbic acid and (B) 3,4-dihydroxyphenylacetic acid (DOPAC), as shown in Fig. 11.3. Steady-state current was observed even at potentials as high as +1.2 V vs Ag/AgCl, due to the wide potential window of BDD. 

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