スサビノリの脂質について-IV : 各種乾のり中のカロチノイドおよび脂肪酸組成

概要

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Several samples of “Nori” processed at different places (shown in Table 1) were investigated to determine carotenoid content, and composing patterns of the pigment groups and fatty acids. Results of the experiments were as follows: 1) “Nori” of the ordinary quality had mostly 140-210mg% of carotenoids, while the inferior products contained 70-100mg% of the pigments. 2) Carotenoids of “Nori” were observed to decrease during storage; in cases of samples 1 and 2 the tendency was remarkable after five months and the pigments fell to one fifth or sixth of the original after one year (Table 2). 3) Composing patterns of six carotenoid groups separated on alumina column were almost similar to each other; having 17-30% of carotene and 52-67% of lutein (Table 3). Inferior samples, however, seemed to contain less percentages of I-group but more IV-group pigments than ordinary products. 4) The samples analyzed showed scarce difference among their fatty acid composition, and no difference was observed between normal and diseased weeds of Narawa (samples 1 and 2) either. The “Nori” products contained in their composition 35-60% of C20:5 acid, 18-32% of C16:0 acid, and such percentages of other acids as shown in Table 4.