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Results showed that the best separation factor of sulfides amounted to 1.7 by ZSM-5 membranes loaded with 0.2 mol/L Ag+ solution. The separation performance of the membranes was the best when activated 450℃. Benzothiophene showed a strong competitive adsorption effect to thiophene.

实验表明：当银离子浓度为0.2 mol/L时硫化物的分离因子最高达到1.7；当活化温度为450 ℃时ZSM-5分子筛膜的分离性能最好；苯并噻吩对噻吩有较强的竞争吸附影响。

The optimal measuring conditions were investigated. The results indicated that the catalytic reaction to Pt and bromocresol purple was the first-order reaction. The apparent activation energy was 217.4kJ/mol and the maximum absorption wavelength of fading reaction was at 434 nm. The linear range of Pt was 0.16-4.0μg/L and the detection limit was 2.5×10^(-11)g/mL. Most of common ions had no interference with the determination, while ten multiples of Ru, Rh and Os had interference with the determination of Pt. Therefore.

选择了最佳测定条件，实验结果表明，催化反应对铂和溴甲酚紫为一级反应，反应的表观活化能为217.4kJ/mol，褪色反应的最大吸收波长为434nm，方法测定R哪的线性范围为0.16~4.0μg／L，检出限为2.5×10^(-11)g/mL，大多数常见离子不干扰测定，10倍以上的Ru，Rh和Os对测定有干扰，可在测定前分离除去。

Bis-(2,3-dibromo-4,5-dihydroxy-phenyl)-methane is a natural bromophenol with significant inhibition against PTP1B IC_(50=2.4μmol/L, which was isolated from the ethanol extract of red algae Rhodomela confervoides.

双-(2，3-二溴-4，5-二羟基苯基)-甲烷是从松节藻醇提物中分离鉴定出的溴酚类化合物，体外活性筛选发现，它具有极强的蛋白酪氨酸磷酸酶1B(PTP1B)抑制活性IC_(50=2.4μmol/L。

In the RAPD system of Bryaceae the optimal concentration of template DNA was 2ng/μl, primer 0.4μmol/L, dNTP 0.2mmol/L, Mg2+ 2mmol/L, Taq DNA polymerase 1.25U, total volum 25μl. Several DNA samples were selected to choose the compatible primers.

通过单因素和正交试验对影响RAPD的因素进行考查，建立了优化的RAPD反应体系：dNTP为0.2mmol/L，随机引物0.4μmol/L，Taq DNA聚合酶1.25U，Mg2+为2mmol/L，模板DNA为50ng，扩增体系为25μl。

The result showed that we have established a ITS-PCR system most suitable for Buxus sinica var. parvifolia, which came out total volume 50μL reaction system, was as follows: 2.0mmol/L Mg(superscript 2+), 0.3μmol/L primer, 0.3mmol/L dNTP, 240 ng/50μL DNA template, 1.75 U/50μL TaqDNA polymerase and the anneal temperature with 56℃.This optimized ITS-PCR system might ensure the purity and quality of ITS-PCR production. In this study, the length of the ITS fragment of Buxus sinica var.

实验结果表明，在总体积50μL的反应体系中，建立了最佳ITS-PCR扩增条件：Mg(上标 2+)浓度2.0mmol/L、引物浓度0.3μmol/L、dNTP浓度0.3mmol/L、DNA模板浓度240ng/50μL、TaqDNA聚合酶的用量1.75U/50μL和退火温度56℃，该优化体系保证了珍珠黄杨ITS-PCR产物的纯度和质量要求。

Lipase mediates esterification between caproic acid (0.6mol/L) and ethanol (0.6mol/L) in n-heptane at 40℃. The decrease in caproic acid is measured by titration and 1 unit of lipase synthetic activity is defined as 1 μmol caproic acid consumed per min.

在40℃下，脂肪酶催化己酸(0.6mol/L)与乙醇(0.6mol/L)在正庚烷中进行酯合成反应，通过滴定法测定剩余的己酸，1个脂肪酶有机相合成酶活单位定义为：在测定条件下每分钟消耗1μmol己酸的酶量。

The recombinant enzyme hydrolyzed p-nitrophenyl esters but not tributyrin and tricaprylin, and exhibited the highest specific activity (1.1 μmol min-1 mg-1) to p-nitrophenyl caprylate.

SsoPEst不水解三酰甘油酯，可以水解对硝基苯酚酯，对对硝基苯酚辛酯水解活力最高，为1.1 μmol min-1 mg-1，催化对硝基苯酚酯水解的最适pH为5.5，最适温度为80 °C，酶溶液置于80 °C 热处理1小时仍有60 %活力。

The carboxyl groups of QDES were used to couple the free amino groups of EAH Sepharose 4B with the carbodiimide coupling method, and immobilized density was 5μmol/ml.

通过碳二亚胺反应将四肽配基QDES固定在商品介质EAH Sepharose 4B上制备出了配基固定化密度为5μmol/ml的亲和吸附介质，并利用亲和色谱柱考察了其吸附蛋白质特性。

Because of attraction between water molecule and carbonium ion, the severe contract in system volume brings about activation volume effect (the most negative A〓 observed in this work is 407cm〓mol〓), which produces subtle relationship between reaction kinetics and pressure in a certain operating region.

反应过渡产物正碳离子及水合正碳离子与近临界状态水分子之间强烈相互吸引导致反应活化体积出现极负值现象（本实验所测极值为-407cm〓·mol〓，这使得水解动力学参数对反应压力存在敏感依赖关系。

The catalyst prepared by impregnating SBA-15 in solution of 0.1 mol/L ceric sulfate and being calcined at 300℃ for 3h showed best catalytic activity in synthesis of n-butyl acetate.

用0.1 mol/L的硫酸高铈浸渍SBA-15，焙烧温度为300℃，焙烧时间3h，通过乙酸正丁酯的合成反应考察催化剂Ce-SBA-15的制备，酯化率为95.7%。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。