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The results indicated that acetophenone can be reduced by NaBH4/BF3Et2O with high chemical yield and low to moderate enantioselectivity when amino alcohols were used as catalysts.

结果表明：这些氨基醇催化NaBH4/BF3Et2O还原苯乙酮可以获得很高的化学产率和低到中等的对映选择性。

Calculate the minimum number of amino acid residues necessary for one segment of a helix to traverse the membrane completely.

计算跨过的一个节段的α螺旋所需的最低氨基酸残基数。

Peptide A molecule consisting of a number of amino acid molecules linked together.

肽：由许多氨基酸分子连接而成的分子，可以认为肽由缩合反应形成。

The separation and purification technologies of amino acid,such as: precipitation ,ion-exchange,extraction and membrane separation were reviewed.

总结了氨基酸分离纯化过程中常用的技术，如沉淀法、离子交换法、萃取法和膜分离法，介绍了各种技术的基本原理、特点和发展动态。

Evidences show that excitotoxcities of excited amino acid and free radical, Ca2+ overload, environmental alteration of neurons, mitochondrial dysfunction and activation of some apoptotic genes may be involved in it.

缺血性脑卒中确切的神经元凋亡机制尚不清楚，目前认为可能与兴奋性氨基酸、Ca2+超载、自由基的毒性作用、神经元生存环境的改变、线粒体功能障碍及凋亡调控基因的激活等因素有关。

The measure of amino acid ratio and N-terminal sequence of the protein coincided with the relational reports.

所得蛋白质氨基酸测定和N端测序的结果与有关报道的一致。

The effect of the molar ratio of amino acid to copper,microwave power,reaction time and pH value on chelate reaction was investigated.

采用微波螯合工艺，对复合氨基酸与铜的配位比、微波时间、微波功率及反应体系的pH对螯合反应的影响进行详细的研究。

This blend of specially processed whey proteins is designed to maximize amino acid absorption and Biological Value.

这种融合了特殊处理乳清蛋白的目的是最大限度地提高氨基酸的吸收和生物价值的。

They also modified two different types of amino acids in the bean to make it more acidic.

他们还修改了两种不同类型的氨基酸，在菜豆，使其更具酸性。

The diets of test group 1, 2 and control group included in 0.5% enzymatic casein (small peptides above 80% and average length of peptides is 2.98), 0.5% acidify hydrolyzed casein(free amino acids above 80%) and 0.5% casein.

试验期56天。结果表明：添加O.5％酶解酪蛋白组草鱼其相对生长率、净蛋白沉积率、饲料系数和血浆中镁含量与小肽总量均显著高于添加0.5％酪蛋白组和0.5％酸解酪蛋白组(p＜0.05)。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。