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Tris cyanurate as an excellent additional retardant was synthesized by using cyanuric chloride and 2,4,6-tribromophenol as starting materials in the presence of acid accepter.

本文以三溴苯酚和三聚氯氰为原料,在缚酸剂的存在下,合成了一种性能优良的添加型阻燃剂三三聚氰酸酯。

Study on the Crystallization Process of Labeled GL-7-ACA Acylase CA130 Complex 7β-bromoacetyl amino cephalosporanic acid (BA-7-ACA), an analog of glutaryl-7-amino cephalosporanic acid (GL-7-ACA), can inhibit and specifically alkylate GL-7-ACA acylase (CA130) from Pseudomonas sp. 130, forming a carbon-carbon bond between BA-7-ACA and the C-2 on indole ring of Trp-β4 residue of CA130.Here we reported that BA-7-ACA labeled CA130 (BA-C130) could self-catalyze the hydrolysis of BA-7-ACA during crystallization process. The hydrolysis was confirmed to be a reaction analogous to the one of GL-7-ACA by comparative MALDI-TOF (matrix-assisted laser desorption/ionization-time of flight) spectrometry analysis.

二、GL-7-AcA酰化酶CA130标记复合物的结晶过程研究溴乙酰氨基头孢烷酸(7β-bromoacetyl amino cephalosporanic acid,BA-7-ACA)作为戊二酰-7-氨基头孢烷酸(GL-7-ACA)的类似物,不仅能够抑制GL-7-ACA酰化酶CA130的活力,而且能通过在BA-7-ACA和CA130的β亚基第四位色氨酸吲哚环二位碳原子之间形成碳-碳共价键而将CA130特异的烷基化。

Isinglass and other animal gelatin and its ramification.

硅、砷、二氧化硅、氯化物、溴化物及碘化物、稀土金属、钇、钪及其混合物、其他氯化稀土、碳酸稀土;柠檬酸、氨基酸酯及盐、氨基酸、有机硫化合物、双巯丙氨酸、甲硫氨酸、仅含有氧杂原子的杂环化合物,抗菌素,青霉素和有其结构的青霉素衍生物,链霉素及其衍生物以及它们的盐,四环素衍生物及其盐;鞋靴、家俱等的光洁剂、擦洗膏、明胶及其衍生物;鱼胶;其他动物明胶及其衍生物。

In this article, different soft templates formed by sodium bis (2-ethylhexyl) sulf-osuccinate, nonyl phenol polyethyleneoxy ether (Oπ-10) and cetyltrimethyla- mmonium bromide were used to fabricate CaCO3, BaCO3 and CeO2/CuO nanoparticles with different morphology.

本文分别利用丁二酸二(2-乙基己基)酯磺酸钠、壬基-酚基-聚乙氧基醚(Op-10)和十六烷基三甲基溴化胺形成的不同软模板合成了具有不同形貌的CaCO3, BaCO3和CeO2/CuO纳米粒子。

Potassium, natrium determines it is good that use ion chooses electrode indirect method it is better also with indirect method to determine at calcium of direct way;, it is next occasionally phosphor of; of law of azotic arsenic Ⅲ determines use phosphor molybdic acid is ultraviolet law outcome is better it is better with result of law of personal candy kinase that; blood sugar determines; urea determines use Niao enzymatic ultraviolet anhydride of better; flesh uses rate law result enzymatic law outcome is better; albumin determines, it is vanadium acid next alkalescent phosphoric acid of oxidation law; is enzymatic determine outcome of fluid of use AMP amortize is better; amylase determines law of thing of enzymatic standard background and iodic colorimetric law coefficient of variation all bigger, former a bit small, latter of percent of pass is tallish, each lab can try to choose according to his condition.

结论钾、钠测定使用离子选择电极间接法好于直接法;钙测定用间接法也较好,其次是偶氮砷Ⅲ法;磷测定使用磷钼酸紫外法结果较好;血糖测定用己糖激酶法结果较好;尿素测定用脲酶紫外速率法结果较好;肌酐用酶法结果较好;白蛋白测定用溴甲酚绿法较好;胆红素测定用酶法结果好,其次是钒酸氧化法;碱性磷酸酶测定使用AMP缓冲液结果较好;淀粉酶测定酶法底物法和碘比色法变异系数均较大,前者稍小,合格率后者稍高,各实验室可根据自己的条件加以选用。

The target compound 1 was successfully prepared via esterification, reduction, bromization and cyanation processes by using L--malic acid (2), which is an inexpensive and easily available starting material. The overall yield was 56.7%.

以廉价、易得的L--苹果酸为起始原料,经酯化、还原、溴代和氰化四步反应得到目标化合物-4-氰基-3-羟基丁酸乙酯,合成总收率为56.7%。

Oxo-(4-solanesylaminophenyl)retinoate was successively synthesized from 13-cis-retinoic acid and solanesol by oxidation, bromization and esterification.

以异维A酸和茄尼醇为原料,经氧化、溴化、酯化等一系列反应合成了4-羰基异维A酸(4-N-茄尼基氨基苯酚)酯,其结构经1H NMR,IR和MS表征。

Methods 4-Methylacetophenone was used as starting material to give 2-(4-methylphenyl) propionitrile via reduction, chlorination and cyanation. 2-(4-Bromomethylpheny1) propionic acid obtained by hydrolysis and bromination of compound Ⅲ could further provided loxoprofen sodium through four steps.

以4-甲基苯乙酮为原料,经还原、氯化、氰化得到2-(4-甲基)苯基丙腈,然后经水解、溴化得到关键中间体2-(4-溴甲基)苯基丙酸,该中间体再经过4步反应可制得洛索洛芬钠。

It is found that when the molar ratio of sulphoxide,pyridine and acetyl bromide is 1∶0.6∶0.4,the catalytic effect on the ring-enlargment is the best,and the yield and purity of the final product can reach 76% and 97% respectively at a pH of 1.8 in toluene under refluxing for about 3.5h.

通过正交实验可得出以下结论:当N,N′-双脲-亚砜为2.5∶1,乙酰溴-亚砜为0.4∶1,吡啶-乙酰溴为1.5∶1,回流时间为3.5h,酸化pH值为1.8时,扩环反应结果最好,总收率可达76%,纯度97%以上。

Drug intervention groups received either daily inhalation of budesonide, ipratropine or heparin respectively, starting on the 8th day or TGF-β1 monoclonal antibody(TB21)0.5 mg twice (6th and 19th day) via the tail veinous injection.

其它各药物干预组于制作模型第8 d起分别雾化吸入布地奈德(布地奈德组,12只)、溴化异丙托品(溴化异丙托品组,12只)和肝素(肝素组,6只)溶液。4周后检测小支气管平滑肌及胶原厚度,用免疫组化法及原位杂交法观察各生长因子在支气管肺内的表达,用放免法检测血清和BALF中细胞外基质成分Ⅲ型前胶原、层粘连蛋白及透明质酸。

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推荐网络例句

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。

There was a conflict between plebs and patricians in ancient Rome in 494BC.

在公元前494年,罗马发生了一次平民反对贵族的斗争。