Stability of sulpyrine. I. Reversible hydrolysis in alkaline solution.
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Factors Which Influence the Stability of Tryptophan during the Hydrolysis of Proteins in Alkaline Solution*
The stability of tryptophan, when heated in alkaline solution under conditions suitable for the hydrolysis of proteins, has been studied by a number of investigators. In general, the older reports indicate that a somewhat irregular loss of tryptophan usually occurs. With regard to the causes of this loss, the report of Lugg (l), showing that the addition of stannite resulted in partial stabiliz...
متن کاملFactors which influence the stability of tryptophane during the hydrolysis of proteins in alkaline solution.
The stability of tryptophan, when heated in alkaline solution under conditions suitable for the hydrolysis of proteins, has been studied by a number of investigators. In general, the older reports indicate that a somewhat irregular loss of tryptophan usually occurs. With regard to the causes of this loss, the report of Lugg (l), showing that the addition of stannite resulted in partial stabiliz...
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It has long been recognized that lignin is a potential renewable source of chemicals, however, there has been only limited success in the commercialization of processes for converting lignin into chemicals [1,2]. Alkaline hydrolysis of lignin has received considerable attention because the reagents are relatively inexpensive and the phenolic products obtained are of potential value [1]. The mos...
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A faster reaction of the cation is expected for the compounds with a free amino group in the acyl moiety. Such an increase was observed for Ala-Ala-pnitroan~lide b.ut not with Ala-p-nitroanilide. Fischer · et al. concluded that a larger inc-rease in k1 with the latter compound was compensated by a reductionin k2/ki. so that the observed k1k2/(k~1 + k2) term remains the same. This assumption of ...
متن کاملBreakdown of Phospholipids in Mild Alkaline Hydrolysis.
M i l d alkaline hydrolysis of phospholipids, a method introduced by Dawson ( l ) , is based on the following principle. The carboxyl ester groups of a phospholipid are much more susceptible to nucleophilic attack by hydroxy or alcoholate ions than the phosphate group. Thus, by choosing appropriate concentrations of base, phospholipids can be deacylated (Le., the fatty acid esters can be prefer...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1977
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.25.475