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The stereochemical effect of the chiral amino acid residues on the formation of penta-coordinate phosphorus intermolecular mixed carboxylic-phosphoric anhydride from N-phosphorylamino acids was studied with density functional theory calculations at B3LYP/6-311G level.

用密度泛函方法在B3LYP/6-311G水平上对N-磷酰化氨基酸生成五配位磷酸羧酸混酐反应中手性氨基酸残基侧链的立体化学效应进行了研究。

The external standard method was used for quantification. Five sulphonamide residues were separated in 30min completely and the peaks were symmetrical.

结果表明，五种磺胺类残留药物能在35 min内得到有效分离，峰形对称。

At which silver recovery from zinc leaching residues by using sulphydryl collectors.

另外，从新的用药组成及结构看，新的用药制度不会影响锌的电解生产。

Simultaneous determination of N, N-Dimethylaniline and phenol in wastewater by high-performance liquid chromatography with chemiluminescence detection; 2 rapid determination of rudimental trace aniline in indigotine by reverse phase HPLC; 3 determination of the levels of tetracycline and oxytetracycline residues in liver tissue by HPLC-CL; 4 rapid determination of Shikimic acid in taxodium distichum by ion-suppression reversed-phase HPLC.

第二节是高效液相色谱及其与化学发光柱后检测技术在药物分析中的应用，研究了四环素、土霉素的HPLC-CL方法，应用于动物肝组织中四环素、土霉素残留量的测定；并研究了用离子抑制-反相高效液相色谱法快速测定落羽杉中的莽草酸的新方法。

The partial sequence of Trionyx sinensis 5S rRNA determined contained only one nucleotide residue different from that of Terrapene carolina 5S rRNA and had three different nucleotide residues compared with that of rat 5S rRNA.

部分序列的测定表明它与Terrapene carolina的5S rRNA序列仅有一个碱基的差异，而与大鼠的5S rRNA序列则有三个碱基的差异。

Results: The anti PSA scFv/human p53 tetramerization domain fusion gene consisted of 891bp encoding 297 amino acid residues, and was the same as that reported before. The expression products of the tetrameric anti PSA scFv, which relative molecular mass was about 35 000, were confirmed by SDS PAGE and Western blot.

结果：获得了抗PSA scFv/人p53四聚功能域融合基因，基因全长891bp，可编码297个氨基酸，与已发表的抗PSA，scFv，人IgG3上游铰链区和人p53四聚功能域基因cDNA序列一致。

In attempt to obtain a further insight into the contribution of charged residues to other allosteri c properties , in this study we designed and synthesized a site directed mutan t , b82 Lys-Asn , for examing influencs the tetrameric stability and enthalpit ic change in O2 binding of human adult hemoglobin.

本研究焦点放在血红蛋白中央空腔中，带有正电残基的其中一个位置，b82 Lysyl ，来研究其正电离子效应与人类血红蛋白氧合反应热及四合体安定性的相关。针对这个目标，我们利用电脑做胺基酸序列排列比对和分子结构的模拟，选择以Asparaginyl残基取代Lysyl残基。

The more thermostable TspHYD contains more aromatic residues in the interior of the structure than BpHYD and BstHYD.

热稳定性高的TspHYD的芳香族氨基酸的数目比BpHYD和BstHYD多，并且多分布在酶分子的内部疏水核心中。

Connection of this intermediate with other amino acid residues followed by elaboration of thiazoline ring with Kelly\'s methodology, and macrocyclization at the N-Me-IIe-Pro site afforded apratoxin A and its oxazoline analogue.

然后，我又合成了另外三个Dtena片段类似物，并按照邹斌博士的路线分别再经过六步反应合成了另外三个Apratoxin A的噁唑啉环类似物。

This invention created by the antibody ELISA analysis methods can be used to detect thio ethoxy organic phosphorus pesticide residues, the method is rapid, sensitive and inexpensive and convenient.

本发明用该抗体建立的酶联免疫吸附分析方法可用于检测硫代乙氧基有机磷类农药残留，方法具有快速、灵敏、廉价以及方便等优点。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。