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为开发“要素膳”的氮源,本文对酶解猪血纤维蛋白的营养价值进行了研究。结果表明,酶解猪血纤维蛋白所含8种人体必需氨基酸,占氨基酸总量的40％;化学评分(CS)为42,第1限制氨基酸为蛋氨酸;必需氨基酸指数(EAAI)为83,优于植物蛋白。动物实验证明,可促进幼年大鼠生长,蛋白质功效比值(PER)为2.44;可促进成年大鼠体重恢复;可维持成年大鼠氮平衡(167±63.6mg/日),但不如酪蛋白。主要是因为色氨酸含量偏高;蛋氨酸、缬氨酸、苯丙氨酸含量偏低。若能改善其氨基酸平衡,不失为优质氮源。
In order to develop the nitrogen source of “elemental diet”, the nutritional value of enzymatic hydrolysis of porcine blood fibrin was studied in this paper. The results showed that the essential amino acids contained in 8 kinds of human body essential for enzymatic hydrolysis of swine fibroin accounted for 40% of the total amino acids, the chemical score (CS) was 42, the first restricted amino acid was methionine, the EAAI was 83, In plant protein. Animal experiments show that it can promote the growth of young rats, the protein efficiency ratio (PER) of 2.44; can promote weight gain in adult rats; maintain nitrogen balance in adult rats (167 ± 63.6mg / day), but not as good as casein. Mainly because of the high content of tryptophan; methionine, valine, phenylalanine content is low. If you can improve the amino acid balance, after all, a good source of nitrogen.