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Some materials were synthesized in this paper at first, 1-nitro-2-pentanol was synthesized with nitromathane and butyraldehyde and the yield was 70.2%; l-nitro-2-pentanol was reduced to 1 -amino-2- pentanol with iron and the yield was 65.2%.

分别用氢氧化钠、三乙胺为缚酸剂,2-氨基-1-丁醇、1-氨基-2-戊醇、环己酮和二氯乙酰氯为原料,采用一步法和分步法合成了两种潜在除草剂安全剂。

Activity of GAD was assayed by measuring the formation of GABA.

根据L-谷氨酸脱羧酶能够分解谷氨酸产生γ-氨基丁酸和CO2的特性,通过测定产物γ-氨基丁酸推断酶活。

The amino and carboxyl groups themselves are basic and acidic, respectively; the amino group of one amino acid really combines with the carboxyl group of another.

氨基和羧基分别具有碱性和酸性,氨基酸的氨基易于和另一个氨基酸的羧基相结合,结果是消去一分子水和形成一个肽键。

Our chief products include as follows: 5-Nitro-8-hydroxy Quinoline, 8-Aminoquinaldine, 8-Hydroxyquinoline Sulfate, 5,7-Dichloro-8-hydroxyquinaldine, 5-Nitro-0-cresol, 6-Nitro-m-cresol, 2'-Chloroacetophenone, 4-Methyl-5-thiazole ethanol, 4-Aminophenethyl alsohol.

主要产品有:硝羟喹啉,8-氨基喹啉,8-羟基喹啉硫酸盐,8-羟基喹哪啶,5,7-二氯-8-羟基喹哪啶,5-硝基邻甲酚,6-硝基间甲酚,邻氯笨乙酮,4-氨基笨乙醇,4-甲基-5-噻唑乙醇,3-羟基吡啶等。

Using ultrasonic to measure the thickness of the cholecyst cliff in these patients. At the same time, we measure their breadth of the portal vein and the level of the ascites, and examine the level of ALB、TBil、AST、ALT in blood serum.

采用超声观察178例肝硬化患者的胆囊壁厚度和腹水检查、门静脉宽度、血清白蛋白水平、总胆红素水平以及门冬氨酸氨基转移酶、丙氨酸氨基转移酶水平。

METHODS: Inexpensive quinine and cinchonine were transformed to 9NH2quinine and 9NH2cinchonine, which reacted with 4chlorobenzoyl chloride to afford 2 novel chiral ligands. The AD reactions of olefins were performed in H2OtBuOH (1∶1) using the 2 ligandsK2OSO24 as catalysts.

以价廉易得的奎宁和辛可宁为原料,经过结构转换得到9氨基奎宁和9氨基辛克宁,进而与对氯苯甲酰氯反应制得两种新型手性配体,并将其用于锇催化的烯烃的不对称双羟化反应。

A method for determinating the activities of pectinase was proposed in this paper. It can produce the red-brown amino compounds when 3,5-dinitrosalicylic acid and aldehyde were heated together. The amino compounds had maximum absorbency at 540nm. In certain range, there was a good linear relationship between the amount of reducing sugar and the color of the reaction mixture.

针对QB1502-92标准测定方法测定高活力果胶酶、固定化果胶酶活力存在的实验误差大,重现性及灵敏度差的缺陷,提出了利用3,5-二硝基水杨酸与醛糖共热产生棕红色的氨基化合物,在一定范围内还原糖的量和含有呈色氨基化合物的反应液颜色深浅成正比的原理,在540nm下测其吸光度,从而计算出果胶酶活力的测定方法,并对测定步骤、影响因素及测定中可能出现的问题进行了试验研究。

According to the regular condensation polymerization principle, a certain amount of amino terminated polyether D230 and a certain amount of divinyl three amine are mixed uniformly by water, and then a certain amount of hexanedioic acid is added in and stirred for dissolving.

本发明属于工业水处理技术领域,具体涉及一种抑制水中二氧化硅/硅酸盐垢沉积的非离子型聚合物及其制备方法,该聚合物是一种含具有醚键、仲胺键、肽键结构的非离子型共聚物,具体为己二酸/端氨基聚醚/二乙烯三胺共聚物,按照常规的缩聚反应原理,首先用水将一定量的端氨基聚醚D230和一定量的二乙烯三胺混合均匀,然后加入一定量的己二酸并搅拌使其溶解。

Results The mortality of senile group was 6.60%, it has signifacantly higher than that of control group and the value of ALT, AST, SB in senile group were significantly higher than those in control group before treatment, the cure rate of ALT,AST in senile group was significantly lower than that in controul group and the cure rate of SB has no significance in two groups.

治疗 老年组的丙氨酸氨基转移酶、天冬氨酸氨基转移酶、总胆红素值显著高于对照组,老年组ALT、AST的治愈率显著低于对照组,而SB的治愈率在两组中差异无显著性。

Deamination A type of chemical reaction in which an amino group (NH2) is removed from a compound.

氨基作用:从有机化合物上除去一个氨基(NH2)的一类化学反应。

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但我们并不在乎沙场中的显露。

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啊!不用提了。提到肉,真是糟透了。

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