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- W1030452403 abstract "This chapter discusses the chemistry and physiology of vitamin A. Chemical work on vitamin A depends on the establishment of biological activity. In the preparation of vitamin A concentrates by extraction from fish liver oils, the distribution of the vitamin can be adequately checked by determination of the ultraviolet absorption spectrum or even by use of the antimony trichloride test. The most commonly used criterion of response to vitamin A is the rate of growth (increase in body-weight) of young animals that have been fed exclusively on a vitamin-A-free diet for sufficiently long to have remained stationary in weight over an adequate period. With big enough groups of animals the average increase in weight should be a function of the amount of vitamin A given to supplement the basal diet. In this chapter, isolation of pure vitamin A is discussed. Measurement and distribution of vitamin A is described. The physiological action of vitamin A is elaborated. The chapter also discusses about synthesis of perhydrovitamin A and the possible isomers of Vitamin A." @default.
- W1030452403 created "2016-06-24" @default.
- W1030452403 creator A5002064097 @default.
- W1030452403 creator A5013801692 @default.
- W1030452403 creator A5039245621 @default.
- W1030452403 date "1944-01-01" @default.
- W1030452403 modified "2023-09-23" @default.
- W1030452403 title "The Chemistry and Physiology of Vitamin A" @default.
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