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Ascorbic acid products

Hancock, R.D. and Viola, R. (2001) The use of micro-organisms for L-ascorbic acid production current status and future perspectives. Applied Microbiology and Biotechnology, 56 (5-6), 567-576. [Pg.335]

Whey hydrolysis and dairy waste processing for production of food ingredients [116] production of glucose, galactose, substrates for alcohol and ascorbic acid production [64] Solubilization of fish, meat, and leather remains, production of protein hydrolysates [64,65]... [Pg.446]

A careful consideration of the Reichstein synthe.sis shows that C-1 of the D-glucose precursor molecule becomes C-6 in the L-ascorbic acid product. This is known as carbon-chain inversion and a number of further synthetic procedures have been reported in recent years involving similar glucose C-1/C-6 inversion. The path of the glucose C-1 carbon is asterisked in Figure 4.3. [Pg.53]

The tablets sold in pharmacies, which are used to prevent or treat colds, usually contain much larger amounts (200-1000 mg) of ascorbic acid. Could this high dose be harmful Does it make sense to exceed the physiologically necessary dosage or to take megadoses of vitamin C A general answer to the first question is given in a separate stoiy 3.14). For present purposes, it suffices to state that the approved ascorbic acid products are safe even if they contain several times of the recommended daily intake of vitamin C. [Pg.159]

Recently, a number of compounds have been synthesized and analyzed employing Mdssbauer spectroscopy by the group of Nath and Eng. Many of these compounds are monomeric but some are polymeric. Here we will look at one of these studies. Products were formed from reaction with ascorbates and various triorgano- and diorganotin halides. Below is the suggested structure about the dibutyltin-ascorbic acid product emphasizing the octahedral nature about the tin atom (9) [68-71]. [Pg.308]

The increased urinary PBG produced by rats after AIA administration was found to be enhanced by fasting and decreased by a carbohydrate diet [Rose et al.. 111]. DeMatteis [77] later found that the porphyria induced by AIA in rats could be completely suppressed by feeding glucose frequently, at a high level. The induced porphyria also caused a marked increase in ascorbic acid excretion, which, however, was not overcome by glucose. Actinomycin blocked the synthesis of ALA in rats treated with AIA but did not affect ascorbic acid production. [Pg.111]

Bremus C, Herrmann U, Bringer-Meyer S, Sahm H.The use of microorganisms in L-ascorbic acid production. J Biotechnol 2006 124 196-205. [Pg.647]

Dykhuizen, D. E., Harrison, K. M., and Richardson, B. J., 1980, Evolutionary implications of ascorbic acid production in the Australian lungfish, Experientia 36 945-946. [Pg.37]

Banta S, Swanson BA, Wu S, Jamagin A, Anderson S (2002) Optimizing an artificial metabolic pathway engineering the cofactor specificity of Corynebacterium 2,5-diketo-D-gluconic acid reductase for use in vitamin C biosynthesis. Biochemistry 41 6226-6236 Bremus C, Herrmann U, Biinger-Meyer S, Sahm H (2006) The use of microorganisms in L-ascorbic acid production. J Biotechnol 124 196-205... [Pg.257]

Fig. 15.1 The Reichstein process and microbial fermentation processes for L-ascorbic acid production. Three pathways for vitamin C production are shown The Reichstein process includes six chemical steps (Ca-Cf) and one microbial step (Ml). Ca catalytic hydrogenation, Cb protection of hydroxyl groups with acetone, Cc oxidation, Cd deprotection of acetone, Ce esterification with methanol, Cyiactonization. M2 microbial process includes three chemical steps (Ca, Ce, Cf) and three microbial steps shown as M2 in the figure. M3 microbial process includes one chemical step (Ca) and three microbial steps (shown as M3)... Fig. 15.1 The Reichstein process and microbial fermentation processes for L-ascorbic acid production. Three pathways for vitamin C production are shown The Reichstein process includes six chemical steps (Ca-Cf) and one microbial step (Ml). Ca catalytic hydrogenation, Cb protection of hydroxyl groups with acetone, Cc oxidation, Cd deprotection of acetone, Ce esterification with methanol, Cyiactonization. M2 microbial process includes three chemical steps (Ca, Ce, Cf) and three microbial steps shown as M2 in the figure. M3 microbial process includes one chemical step (Ca) and three microbial steps (shown as M3)...
Industrial large-scale production is performed by biological oxidation of D-sorbitol in solution by the action of Acetobacter xylinum, and is the first step in the technical sequence of - ascorbic acid production. [Pg.262]


See other pages where Ascorbic acid products is mentioned: [Pg.5]    [Pg.258]    [Pg.403]    [Pg.871]    [Pg.984]    [Pg.417]    [Pg.134]    [Pg.748]    [Pg.23]    [Pg.387]    [Pg.330]    [Pg.321]    [Pg.101]    [Pg.342]   
See also in sourсe #XX -- [ Pg.29 , Pg.154 ]




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