著者

太田 冬雄

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.19, no.11, pp.1061-1064, 1954

被引用文献数

1

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The lustrous particles in epidermis of hair-tail has been utilized as a principal source of pearl essence in making imitation pearl in Japan. In the process of refining the raw particles, first necessaries, of coures, will be to know the content and properties of impurities in the particles. But, little satisfactory analysis of the raw material was found out. Then, the writer attempted to investigate the chemical constituents of raw particles. In this paper, some peculiarities of them were reported. The results obtained were summarized as follows:<br> 1) The particles contained co siderable amount of ash and fat besides nitrogenous compounds which hold the greater part of moisture free particles.<br> 3) The nitrogenous compounds of particles were almost insoluble in water and soluble in the solution of acid and alkali as in the case of guanine which was already identified as a chief constituent of partcles. Most of the nitrogenous compounds of particles dissolved in both acidic and alkaline solution, were precipitated by the neutralization of the solution. Only a little common protein were present in the solution.<br> 3) Phosphorus content of the extractives obtained with organic solvents, varied acording to the sort of the solvent used for extraction and it was the largest in that of alcohol, though there was little difference in the amount of extracives.<br> 4) The composition of ash of particles differed significantly that of common fish scale or fish bone. Namely, the ash of particles was rich in P and Mg, and relatively rich in S, Cl, Na, K, Ca, Fe and Al.