<研究報告>蛋白質の栄養評価について(第一報) : くらげ及びあさり貝蛋白質の生物価

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1. The biological values of jelly fish protein and small neck clam protein were estimated from nitrogen balance index. Adult male rats were used as the subject. 2. The relationship between nitrogen intake and fecal nitrogen was linear. The relationship between nitrogen intake and urinary nitrogen, however, was not represented by a straight line, but a second degree curve (parabolic). Therefore, there was a second degree relationship between absorbed nitrogen (A) and nitrogen balance (B). 3. The biological values have been practically estimated on the assumption that there is a linear relationship between (A) and (B) over the whole range of negative nitrogen balance, and that the slopes of these lines are the fraction of nitrogen retained in the body of the animal. And these slopes show the biological values of the proteins. But, if the relationship between (A) and (B) is a second degree curve, the biological values have to be estimated by the slope of line tangent to the curve at B = 0.4. By the method of nitrogen balance index which has been shown by Allison, Anderson and Seeley, the biological values of jelly fish protein and small neck clam protein were 66% and 73% respectively. 5. The above mentioned biological values, estimated frcm the slopes of lines tangent to the second degree curves at B = 0, were 439% and 63% respectively.
福岡女子大学の論文
1960-04-30