查询词典 lactic acid

MAIN OUTCOME MEASURES:①degradation rates of PLGA with different ratios of lactic acid and glycolic acid.

主要观察指标：①不同质量比聚乳酸-乙醇酸的降解速率。

A direct copolymerisation process was used to prepare lactic acid and glycolic acid copolymer.

采用直接法熔融缩聚制备了L 乳酸和乙醇酸共聚物PLGA ，并用锥板流变仪对PLGA的流变性能进行测试。

Firstly, D,L-lactide was synthesized from D,L-lactic acid with zinc powder as catalyst,and glycolide from glycolic acid using Sb2O3 as catalyst.

首先以乳酸为原料，锌粉为催化剂合成了丙交酯；以乙醇酸为原料，三氧化二锑为催化剂合成了乙交酯。

When 2.0 g/L of malate was added to the fermentation medium, the metabolic flux of byproducts L-Ala and lactic acid decreased by 22.1% and 16.5%. At the same time, the metabolic channeled to EMP and glyoxyl circle decreased by 2.26% and 9.09%. However, the metabolic flux channeled to HMP increased by 2.26%.The metabolic flux channeled to the L-glutamic acid synthesis pathway increased from 73.59% to 79.92%.

在L-谷氨酸发酵中、后期添加2.0 g/L苹果酸后，合成副产物L-丙氨酸和乳酸的代谢流量明显减少，分别降低了22.1%和16.5%，EMP途径和乙醛酸循环的代谢流分别减少了2.26%和9.09%，HMP途径的代谢流增加了2.26%，而L-谷氨酸生物合成的代谢流从73.59%增长至79.92%，较未添加前提高了6.33%。

Laboratory evaluation consists of hematocrit (hemoconcentration suggests preeclampsia), platelet count, protein excretion, serum creatinine, serum uric acid, serum alanine and aspartate aminotransferase concentrations, and lactic acid dehydrogenase concentration.

实验室评估包括红细胞压积，血小板计数，蛋白排泄，血肌酐，血尿酸，血清丙氨酸氨基转化酶和天门冬氨酸氨基转化酶，和乳酸脱氢酶浓度

Central venous pressure, mean arterial pressure, the ratio of lactic acid to pyruvic acid in venous blood, systemic inflammative response syndrome, volume of blood and fluid administrated intra- and post- operatively, complications and the therapeutic outcomes were determined in each group.

分别测定各组病人术后中心静脉压、平均动脉压、静脉血乳酸与丙酮酸比值、术中和术后输血、输液量、全身性炎症反应综合症发生率、并发症发生率和治疗结果。

In this article, high-pure lactic acid and ethanol acid were used to synthesized PLGA by direct condensation polymerization, and zinc octanoate of low nocuity was used as katalyst, instead of stannous octanoate to synthesize PLGA by the way of opening ring.

本文首次采用高纯度乳酸、乙醇酸直接缩聚合成无催化剂的端羧基PLGA，并分别采用了低毒性辛酸锌代替辛酸亚锡为催化剂通过开环聚合法合成端羧基／酯封端PLGA。

Protocatechuic acid, 4-hydmxyphenyl-lactic acid are separated from the plant for the first time.

原儿茶酸，羟基苯乳酸首次从该种植物中分离得到。

In chapter 6, a simple and rapid method for the simultaneous determination of three water-soluble compounds,β(3, 4-dihydroxyphenyl) lactic acid, protocatechuic acid and protocatechuic aldehyde, in radix Salviae Miltiorrhiza injection was firstly developed.

在第六章，我们首次建立了一种简单的、快速的同时测定丹参注射液中三种水溶性化合物丹参素、原儿茶酚和原儿茶醛的毛细管区带电泳法。

Hydrothermal reactions makes water a Bronsted base-acid and act as an effective catalyst and the metal ions represent Lewis base character. The conversion process occurs in a very complex network of parallel, consecutive and equilibrium reactions, and the last step being the catalyzed Cannizzaro-type reaction of pyruvaldehyde to lactic acid.

nsted酸碱并具有一定的催化作用，金属离子在水热催化降解丙酮醛生成乳酸中表现出Lewis碱的特性，能与丙酮醛生成金属复合物，最终生成乳酸，此反应过程符合Cannizzaro反应特性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。