查询词典 methyl

Methyl, Propyl, Butyl and Ethyl Paraben — Used as inhibitors of microbial growth and to extend shelf life of products.

甲基、丙酯、丁酯和尼泊金乙酯——它们的作用是微生物生长抑制剂，并可延长产品的保质期。

The mechanism of the interaction between bovine serum albumin and pyrano [4,3-b] pyran derivative, 2-amino-7-methyl-4-(4-nitrophenyl)-5-oxo-4,5-dihydropyrano [4,3-b] pyran-3-carbonitrile, was studied by means of fluorescence spectroscopy under physiological conditions.

用荧光光谱法分析了在生理条件下一种吡喃并[4，3-b]吡喃衍生物-2-氨基-7-甲基-4-(4-硝基苯)-5-氧代-4H，5H-吡喃并[4，3-b]吡喃-3-腈与牛血清白蛋白的作用机制。

The chemical structure of Ligustrazine is tetramethyl pyrazine, its four methyl can show different efficiency, when they are replaced by different functional units.

川芎嗪化学结构为四甲基吡嗪，其四个甲基被不同的功能基因替代后可产生不同效应，研究发现川芎嗪对心血管系统的作用有多种不同的作用途径和作用机制。

Objective:To study the angiogenesic effects and molecular mechanisms of tetra methyl pyrazine injection on the ischemic myocardium of the rats after myocardial infarction.

目的：观察川芎嗪注射液对心肌梗死后大鼠缺血心肌血管新生作用，并探讨其机制。

All rats were randomly divided into tetra methyl pyrazine injection, Shexiang baoxin pills model group and sham operation group.

结果：模型组、麝香保心丸组及川芎嗪组大鼠MI边缘区MVC和MVD较假手术组明显增多（P〈0.05）；川芎嗪组大鼠缺血心肌MVC和MVD较模刑组明显增加（P〈0.05）。

In this paper,natural pyrethrum nano-capsule with a wall of the copolymer of styrene and methyl methactylate was prepared by means of microemulsion polymerization .

研究用微乳液聚合法制备以甲基丙烯酸甲酯和苯乙烯共聚体为囊壁，以天然除虫菊酯为囊芯的纳米胶囊。

The inhibiting efficiency of bromo-hexadecyl pyridine and 3-methyl pyridine is higher than that of the others.

其中溴化十六烷基吡啶和3-甲基吡啶的缓蚀性能较好。

Keywords Postmortem interval;DNA degradation;Methyl green Pyronine B staining;HE staining

死后间隔时间；胸骨骨髓； DNA含量；甲基绿派洛宁染色；普通HE染色

In the course of the reduction of 2, 4-diamino-5-methyl-6-nitro quinazoline instead of using 〓 catalytic hydrogenation was used for improving the yield.

改进了原合成路线中的〓〓还原的方法，采用催化氢化的方法（催化剂为5％Pd/C），使反应的产率接近8O％。

We used the reported chiral ligand QD-4 derived from quinidine to catalyze the reaction of aldehydes and methyl vinyl ketone in the presence of various additives and found that the highest e.

用喹尼叮衍生物QD-4分别催化醛和丁烯酮以及醛和丙烯酸-萘酚酯的不对称Baylis-Hillman反应，通过改变添加剂和优化反应条件，最终分别取得了最高为49％和70％的e.e值。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。