The determination of diketo l-gulonic acid, dehydro-l-ascorbic acid, and l-ascorbic acid in the same tissue extract by the 2, 4-dinitrophenylhydrazine method.
01 May 1948-Journal of Biological Chemistry (American Society for Biochemistry and Molecular Biology)-Vol. 174, Iss: 1, pp 201-208
TL;DR: Methods for determinations of vitamin C dehydro-Z-ascorbic (DHA), DHA, and DKA in the presence of each other are reported, indicating that these derivatives are identical substances.
About: This article is published in Journal of Biological Chemistry.The article was published on 1948-05-01 and is currently open access. It has received 268 citations till now. The article focuses on the topics: Ascorbic acid.
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TL;DR: The rise in popularity of the tomato during the 20th century to become the world's fourth most significant fruit, making an important contribution to human nutrition.
Abstract: It is proposed to describe briefly the rise in popularity of the tomato during the 20th century to become the world's fourth most significant fruit, making an important contribution to human nutrition. The grading standards for fruit used in various major tomato-producing countries will be outlined. A major part of the review will be devoted to describing changes in composition during the maturation, ripening, preservation, and storage of good quality tomatoes especially as regards carbohydrates, organic and amino acids, proteins, steroids, pigments, minerals, and the lipids, volatiles, and other minor constituents. A range within which composition should normally fall will be given. Additionally, the effects on composition of environment, cultivar, nutrition, and physiological disorders inter alia will be described. How new growing methods and genetic manipulation could influence the tomato of the future will also be considered.
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TL;DR: An improved method was improved for the separate determination of L-ascorbic acid and L-dehydroascorbIC acid in blood plasma, using dithiothreitol, to determine the content of ascorbic acid.
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249 citations
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