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Ascorbic Acid Derivatives as Potential Substitutes for Ascorbic Acid To Reduce Color Degradation of Drinks Containing Ascorbic Acid and Anthocyanins from Natural Extracts

Journal of Agricultural and Food Chemistry, 2019
Ascorbic acid is widely used in the food industry as a source of vitamin C or as antioxidant. However, it degrades quickly in beverages at acidic pH and can accelerate the degradation of anthocyanins, natural dyes used in beverages, leading to a loss of ...
Jacques Lalevée, Violaine Gérard, Christophe Galopin   +2 more
exaly   +2 more sources

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An efficient synthesis of L-ascorbic acid and [5-2H1]-L-ascorbic acid

Journal of the Chemical Society, Chemical Communications, 1979
L-Ascorbic acid has been synthesized via the regio- and stereo-selective reduction of D-threo-2,5-hexodiulosonic acid; this procedure also can be used for preparation of the 5-deuterio-compound.
Glenn Andrews, Bradley Bacon, Thomas Crawford, Ralph Breitenbach   +3 more
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Synthesis of L-Ascorbic Acid

1980
Publisher Summary This chapter provides a summary of the methods developed for the synthesis of L-ascorbic acid. L -Ascorbic acid is a white, crystalline solid melting at 192°C and having, in water, a specific rotation at the sodium D line of +24°. In solution, L -ascorbic acid has a pK 1 of 4.17 and a pK 2 of 11.79.
T C, Crawford, S A, Crawford
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l-Ascorbic acid biosynthesis

2001
Biosynthesis of L-ascorbate (vitamin C) occurs by different pathways in plants and mammals. Yeast contain D-erythroascorbate, a C5 analog of ascorbate. UDP-D-glucuronic acid is the precursor in mammals. Loss of UDP forms glucuronic acid/glucuronolactone. Reduction of these at C-1 then forms L-gulonic acid/L-gulono-1,4-lactone.
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Compounds of L(+)-ascorbic acid with metals VIII. Titanium(IV) complexes of L(+)-ascorbic acid and 5,6-O-isopropylidene-L-ascorbic acid

Inorganica Chimica Acta, 1990
Abstract The reactions of titanium(IV) halogen compounds with the monoalkali and dialkali metal salts of L (+)-ascorbic acid and 5,6-O-isopropylidene- L -ascorbic acid, respectively, in EtOH or THF as solvent, generally result in the formation of complexes of the appropriate dianions.
Wolfgang Jabs, Walter Gaube, Cornelia Fehl, Ralf Lukowski   +3 more
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Topical L-Ascorbic Acid

Dermatologic Surgery, 2001
Reactive oxygen species generated by ultraviolet light result in photocarcinogenic and photoaging changes in the skin. Antioxidants protect skin from these insults.This study defines formulation characteristics for delivering L-ascorbic acid into the skin to supplement the skin's natural antioxidant reservoir.L-ascorbic acid or its derivatives were ...
S R, Pinnell, H, Yang, M, Omar, N, Monteiro-Riviere, H V, DeBuys, L C, Walker, Y, Wang, M, Levine   +7 more
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[Transglycosylation of L-ascorbic acid].

Prikladnaia biokhimiia i mikrobiologiia, 2007
Cyclodextrin glucanotransferases (CGTase, EC 2.4.1.19) produced by mesophilic, thermophilic, and halophilic bacilli, as well as maltase (EC 3.2.1.20) produced by various strains of Saccharomyces cerevisiae have been applied for transglycosylation of L-ascorbic acid using starch, maltodextrin, gamma-cyclodextrin, and maltose as donors of glucosyl ...
A A, Markosian, L A, Abelian, M O, Adamian, Zh I, Akopian, V A, Abelian   +4 more
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L-ascorbic acid: An overview

International Journal of Food Sciences and Nutrition, 1993
This review includes current information on advances regarding the chemistry and synthesis of L-ascorbic acid, highlighting its importance in nutrition, health, food processing (enzymatic browning, meat preservation, beer manufacture, wine production, dairy products, fats and oils, flour and dough improvement), plant and animal applications, and ...
M. G. Roig, Z. S. Rivera, J. F. Kennedy
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Solvent effect on the autoxidation of L-ascorbic acid

Tetrahedron, 1969
Abstract The kinetics of cupric chloride-catalysed autoxidation of l -ascorbic acid has been studied in a number of organic solvents. The solvent effect can be expressed as a linear function of log k vs. reciprocal of dielectric constant (1/D) or Reicherdt's empirical parameter of solvent polarity (ET).8 The electrical conductance measurement shows ...
Y, Ogata, Y, Kosugi
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L-ascorbic acid, L-ascorbate 2-sulfate, and atherogenesis.

International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition, 1976
Rabbits on a high cholesterol diet were divided into three groups: one group received subcutaneous injections of physiological saline 3 times/day, 5 days/wk for 10 wk; another group received subcutaneous injections of L-ascorbic acid (0.37 mmole) according to the same timetable; and the third group was administered an equivalent amount of L-ascorbate 2-
F J, Finamore, R P, Feldman, G E, Cosgrove   +2 more
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