マイワシの鱗の成分組成

概要

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A chemical analysis of the scale of sardine Sardinops melanosticta was made. The major components were found to be ash and a nitrogen-containing substance, and ash and nitrogen contents were 53.16% and 7.38%, respectively, on the basis of dried scale. Total sugars and crude lipid, both of which were low in content, were 0.21% and 0.08%, respectively. Calcium, phosphorus and magnesium in 100g crude ash were 39.39%, 21.08% and 2.08%, respectively. Sodium, potassium and some heavy metals were extremely low in content. Molar ratio of calcium tophosphorus was about 3 to 2. The ratios of hydroxyproline to protein and of nitrogen to protein in the boiling-water extract of scale, together with the SDS polyacrylamide gel electrophoretic pattern of the acetic acid extract of scale, have proved that the nitrogen-containing substance was mostly a collagen. The collagen content was calculated to be about 43%. The amounts of both ash and collagen went up to 96%. This scale collagen was assumed to be type I, and the migration rate of α1 subunit of the collagen was almost the same with that of calf skin type I collagen, butthat of α2 subunit was slower than that of calf collagen.
日本水産學會の論文