l-ascorbic acid


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ascorbic acid, l-ascorbic acid

vitamin c, called also cevitamic acid; a substance found in many fruits and vegetables, especially citrus fruits, such as oranges and lemons, and tomatoes. It is synthesized by most animal species, except primates, guinea pigs, fruit bats and some birds and fish, and so is not a dietary requirement in ordinary circumstances except for the species named.

ascorbic acid nutritional deficiency
occurs in primates and guinea pigs with inadequate dietary intake; affected animals are weak, depressed, anorectic, and have enlarged joints. In farm animals the only example of a possible secondary deficiency is a dermatosis of young calves which occurs at a time at which ascorbic acid levels might be expected to be at their lowest. The syndrome includes heavy dandruff, alopecia and a waxy crust on the skin.
References in periodicals archive ?
Protective role of L-ascorbic acid on antioxidant defense system in erythrocytes of albino rats exposed to nickel sulphate.
Fresh cows milk was from the herd of Faculty of Agriculture, Suez Canal University cooled to 4 [degrees]C and divided into 5 portions: the first portion was fortified with 1% skim milk powder and regarded as control, the second portion (T1) was fortified with 1 % skim milk powder and L-Ascorbic acid at level 200mg/kg, the third portion (T2) was fortified with CH at level 1% (wt/vol), the fourth portion (T3) was fortified with CWP at level 1% (wt/vol), the fifth portion (T4) was fortified with GMP at level 1 % (wt/vol).
Of vitamins, pyridoxine was present only in the dried eggplant skin extract, but L-ascorbic acid was present in fresh tomato and chilli pepper skin extracts.
The L-ascorbic acid is in the form of an ester or a mixture of isomers, which cannot be absorbed or metabolized effectively by the skin.
Although the dietary vitamin C requirement has been estimated in Japanese eel using L-ascorbic acid Ca as the source of vitamin C (Ren et al.
The L-ascorbic acid solution was the most effective in controlling microbial growth.
Epidermal growth factor inhibits transcription of type I collagen genes and production of type I collagen in cultured human skin fibroblasts in the presence and absence of L-ascorbic acid 2-phosphate, a long-acting vitamin C derivative.
Fresh cows milk was from the herd of Faculty of Agriculture, Suez Canal University cooled to 4[degrees]C and divided into 5 portions: the first portion was fortified with 1% skim milk powder and regarded as control, the second portion (T1) was fortified with 1 % skim milk powder and L-Ascorbic acid at level 200mg/kg, the third portion (T2) was fortified with CH at level 1% (wt/vol), the fourth portion (T3) was fortified with CWP at level 1% (wt/vol), the fifth portion (T4) was fortified with GMP at level 1 % (wt/vol).
They include the treatment of must and fermenting wine with charcoal, the use of L-ascorbic acid, the addition of dimethyldicarbonate (DMDC) and also of yeast mannoproteins.