1986, 5(4).
Abstract:本文研究了中华猕猴桃蛋白酶的一些性质和它在配制肉类嫩化剂中的应用。此酶对两种不同的底物具有两种不同的最适pH,即以酪蛋白为底物时,最适pH为5.0～6.5,而以笨甲酰精氨酸乙酯(BAEE)为底物时,最适pH为7.5。在pH4.0～10.0范围内,酶能保持稳定。在65℃热处理16分钟,酶活力残存50%。将此酶配制成肉类嫩化剂处理牛肉,其蛋白萃取液中总可溶性含氮及可溶性非蛋白氮含量均比对照样品高,其脯氨酸甘氨酸含量也有明显的增加。这表明猕猴桃蛋白酶对肌肉组织中的胶原蛋白和弹性蛋白产生了一定作用。流变性质试验也表明该嫩化剂是有效的。
1986, 5(4).
Abstract:A method using the reaction of 2.3-diaminonaphthalene with the trace amount of selenium to form Se-DAN complex is introduced for the flourimetric determination of selenium in food. The condition of experiments was studied. The detection limit was 6 ng. Th
Jian Xuechen , Wu Kuanmin , Yang Yungchen
1986, 5(4).
Abstract:The structure of starch molecules modified chemically that part of dehydroglucide units' hydroxyl group react with alkylating agent and form hydroxylpropyl starch, Hydroxylpropyl ethers of starch have apparently lowered temperatures and much faster speed
1986, 5(4).
Abstract:A systematic investigation on effect of a few surfactants usually used in sugar manufacture on MA(Mean Aperture), CV (Coefficient of Variation) and CRI (Crystal Regularity Index) of sucrose crystals is presented. In term of reference materials, a set of s
1986, 5(4).
Abstract:A simplified calculation method of tolerance errors and excess of feed components in feed manufacturing is presented. A group of straight lines are used in the method instead of two groups of curves that were applied before.
Sun Rongsheng , Hu Shouan , Shen Jizu
1986, 5(4).
Abstract:The structure and principle of a micro computer control system for stoving finish automation line in bicycle factory is introduced. Its programming method is expounded. The dynamic performance indexes of its rotation rate and temperature are analyzed and
1986, 5(4).
Abstract:A new engineering method of optimal segment linear calibration, is introduced. It is based on the principle of uniform approximation, adopting the method of approximating nonlinear curve with noncontinuous bent line uniformly. Nonlinear problems are conve
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