キリンサイEucheuma spinosum (L.) J. Ag粘質物に関する研究-I : 処理による一般成分の変化

概要

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Eucheuma spinosum is abundantly found on the southern sea-shore of Miyazaki Prefecture. A mucilage obtained from it resembles one from another seaweed, Gloiopeltis. But a few days exporsure to direct sunlight coupled with continuous moistening of the seaweed results in bleaching of the plant and a change of consistency of the extract. It is now more similar to that of a land plant, devils tongue, rather than to agar-agar. In an attempt to elucidate the nature of change in properties of the mucilage with special reference to the relation between its chemical constitution and colloidal properties, the material was subjected to various treatments with the following results (cf. Tables 1 and 3): -- (1) In view of chemical properties, especially in ash, total SO3 and in ash SO3 contents, Eucheuma spinosum is similar to Gloiopeltis. (2) An alkali treatment caused remarkable changes especially in the contents of pentose, pcntosan, reducing sugar, total SO3 and SO3 in ash. It may be mentioned that these substances were acclaimed by YANAKAWA(3) to be closely related to coagulability of mucilage. (3) The measurement of refractive index and qualitative analyses point to the conclusion that the substance in question is in substantial similarity with the mucilage of Gloiopeliis (cf. Table 4).
公益社団法人日本水産学会の論文