DECOMPOSITION OF α-TOCOPHERYL SPIRODIMER BY ALKALINE SAPONIFICATION
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چکیده
منابع مشابه
Decomposition of Ƒ ¿ - Tocopheryl Spirodimer
An alkaline saponification method containing pyrogallol is usually applied for the determination of tocopherols. Although there are some metabolites of ƒ¿-tocopherol in tissues, it is not yet clear whether they are true metabolites or degradation products from the alkaline saponi fication. Since it was shown that ƒ¿-tocopheryl spirodimer, a metabolite of ƒ¿-tocopherol, was degraded mainly to a ...
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BACKGROUND: The aim of our investigation was to estimate the stability of alpha-tocopheryl O-glycosides in relation to activity of exoglycosidases in selected rat tissues. MATERIAL AND METHODS: Acetylated glycosides were obtained in glucosidation of alpha-tocopherol using the Helferich method. The activity of exoglycosidases was determined by the Zwierz et al. method. Protein concentrations wer...
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1. The rate of the saponification of iodoacetic acid in sodium hydroxide and alkaline buffer solutions yielding glycollic acid was measured by means of Heyrovský's polarographic method. 2. From the bimolecular velocity constants, increasing with the ionic strength of the solution, the Brönsted factor, F, which characterizes the primary salt effect, was calculated. 3. In the borate buffer soluti...
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Biofilm-related infections represent a recurrent problem in the orthopaedic setting. In recent years, great interest was directed towards the identification of novel molecules capable to interfere with pathogens adhesion and biofilm formation on implant surfaces. In this study, two stable forms of α-tocopherol, the hydrophobic acetate ester and the water-soluble phosphate ester, were tested in ...
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A method for the quantitative estimation of arginine is included by Van Slyke (1911-12) in his procedure for the determination of the nitrogen distribution numbers of proteins. The amino acids present in the protein hydrolysate are divided into two groups by means of phosphotungstic acid. The portion precipitated by t,his reagent is referred to as the basic or diamino fraction and the portion n...
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ژورنال
عنوان ژورنال: Journal of Nutritional Science and Vitaminology
سال: 1973
ISSN: 0301-4800,1881-7742
DOI: 10.3177/jnsv.19.469