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KMID : 0615219960210010253
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Journal of Kwangju Health
1996 Volume.21 No. 1 p.253 ~ p.265
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A study of the Bio-nutritional evaluation of Raja skates caught in Huksando area. Compare with Raja skates of Huksando and imported
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이미경/Lee MK
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Abstract
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In order to study of the Bio-nutritional evaluation of Raja skates caught in Huksando area and imported Falkland area caught Raja skates were purchased and analyzed.
The results which I got are as follows:
Commercially available Raja skates (Huksando and Falkland product) showed proximate content in moisture, crude protein, crude lipid and ash, 77.1%, 21.5%, 0.68%, and 0.72% ; 78.4%, 20.4% 0.65% and 0.55%, respectively.
There are 16 different kinds of amino acid in Huksando Raja skates and 17 different kinds of amino acid in Falkland one by HPLC method. Especially, glutamic acid contained 13.91-14.74% in both Raja skates.
There are 11 different kinds of saturated fatty acid in Huksando Raja skates and 10 different kinds of saturated fatty acid in Falkland Raja skates,by GC method.
In case of unsaturated fatty acid, 14 kinds in Huksando and 18 kinds in Falkland were analyzed.
There are odd carbon fatty acids C15:0, C17:0 and C19:0 in both Huksando and Falkland product.
The p/s ratio in both Huksando and Falkland was 1.14 and 1.02, respectively.
Then-3/n-6 ratio in both Huksando and Falkland was 1.24 and 0.82, respectively.
The content of n-3 fatty acid in Huksando product and in Falkland product showed 17.37% and 11.51%, respectively. The content of n-6 fatty acid in Huksando and Falkland showed 14.01% and 14.02%, respectively.
The Cholesterol content in Raja skates was almost same amount. ATP-Phosphorus, at high temperature, was released faster than at the lower temperature.
The ATPase activity of Myofibril protein was inhibited at the relatively higher concentration of EDTA. KCI, Ca^(2+). and Mg^(2+), but the activity was very high in the lower (less than ImM) concentrations.
According to the cooking condition, boiled muscle showed better digestion by pepsin. From those results, Raja skates (in Huksando) are better source of amino acids and n-3 fatty acid than Falkland one.
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