<研究報告>スオウ染めに関する基礎的研究(III) : ブラジリアン・アルミニウム錯塩の生成に及ぼすアミノ酸の影響

概要

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(1) In order to color brasilin with aluminum, the pH of the colouring solution must be higher than 4.5. (2) In the case of colouring brasilin with aluminum, if the pH of the colouring solution is low, it tends to take a long time to colour, but the colour does not easily fade. (3) Alminum and brasilin form complex salt by a ratio of 1 mol of the former to 2 of the latter, When the pH of the colouring solution is 4.5. (4) The composition of the complex salt, alminum-brasilin, is affected by the addition of amimo acids. When the neutral amino acids (glycilyne and tyrosine) are added to the coloured solution of the complex salt, the molar ratio of its composition changes from 1 : 2 to 1 : 1, and the product of the complex salt slightly increases. The basic amino acid, arginine, has no effect on the composition of the complex salt, and the acidic amino acid, aspartic acid, interferes with its formation. In all these cases as well, the pH of the colouring solution is 4.5. (5) Gelatin which is used as a model substance of silk-fiber does not affect the composition of alminum-brasilin complex at pH 4.5 which is nearly the isoelectric point of gelatin.
福岡女子大学の論文
1971-03-30