Results 261 to 270 of about 268,588 (307)
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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 +3 more
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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 +3 more
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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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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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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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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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Biotechnological approaches for l-ascorbic acid production
Trends in Biotechnology, 2002Over the past decade there has been increasing pressure to develop alternatives to the Reichstein process, a largely chemical synthesis by which the vast majority of world vitamin C (L-ascorbic acid, L-AA) is produced. The pressures include increasing environmental concerns and legislation, and the need to increase process efficiency and reduce capital
Robert D, Hancock, Roberto, Viola
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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, 1976Rabbits 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 +2 more
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Biochimica et Biophysica Acta (BBA) - Biomembranes, 1985
The uptake of L-ascorbic acid and dehydro-L-ascorbic acid into renal cortical basolateral membrane vesicles has been characterized. The uptake systems for both solutes demonstrate saturation kinetics. The presence of structural analogs of L-ascorbic acid and dehydro-L-ascorbic acid results in cis-inhibition and trans-stimulation.
J, Bianchi, R C, Rose
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The uptake of L-ascorbic acid and dehydro-L-ascorbic acid into renal cortical basolateral membrane vesicles has been characterized. The uptake systems for both solutes demonstrate saturation kinetics. The presence of structural analogs of L-ascorbic acid and dehydro-L-ascorbic acid results in cis-inhibition and trans-stimulation.
J, Bianchi, R C, Rose
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ChemInform Abstract: Conformation of L‐Ascorbic Acid in Solution. Part 1. Neutral L‐ Ascorbic Acid
ChemInform, 1991AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Y. A. SHIN, Y. K. KANG
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ChemInform, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
W. JABS, W. GAUBE, C. FEHL, R. LUKOWSKI
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
W. JABS, W. GAUBE, C. FEHL, R. LUKOWSKI
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ChemInform Abstract: AN EFFICIENT SYNTHESIS OF L‐ASCORBIC ACID AND L‐ASCORBIC ACID‐5‐2H1
Chemischer Informationsdienst, 1980AbstractDie Oxidation von Glucose mit Acetobacter‐ und Pseodomonas‐Bakterien ergibt in 85%iger Ausbeute eine Ketocarbonsäure als Hydrat, deren Natriumsalz (I) in 89%iger Ausbeute zu einem 86: l4‐Gemisch der Carbonsäuren (II) und (III) führt.
G. ANDREWS +3 more
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ChemInform Abstract: Derivatives of L‐Ascorbic Acid. Part 2. Synthesis of Deoxy‐L‐ascorbic Acids.
Chemischer Informationsdienst, 1986AbstractAus dem Lacton (I) erhält man durch Acetylierung das Acetat (IIa), welches mit HBr/Eisessig in das Bromid (IIb) übergeführt und mit wäßriger HBr zur Hydroxyverbindung (IIc) verseift wird.
F. DALLACKER, J. SANDERS
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