查询词典 methyl group

The results on the effects of micronucleus in erythrocytes of Danio rerio induced by bensulfuron-methyl at different times and different concentrations showed that the MN rate of control group was 0.0103%, the highest MN rate of experimental group reached to 0.372%, it also indicated that bensulfuron-methyl herbicide had genetics toxicity to Danio rerio.

不同处理浓度和染毒时间对斑马鱼红细胞微核形成的影响试验表明，对照组红细胞微核细胞率为0.010 3%，处理组红细胞微核细胞率最高达0.372%，说明除草剂苄嘧磺隆对斑马鱼具有遗传毒性作用。

Four kinds of hapten with the similar structure of parathion-methyl were designed and synthesized. These four haptens were coupled with different length and structural spacer arms through nitro-group or methoxyphosphate group of parathion-methyl. Then six kinds of hapten-protein conjugates were synthesized by different methods.

根据甲基对硫磷的结构特征，分别从甲基对硫磷的硝基一端或磷酸酯基甲氧基一端引入一定长度的间隔臂和活性基团，设计并合成了 4种结构的半抗原；针对各种半抗原所带活性基团的性质，通过多种方法制备了与不同的载体蛋白偶联的人工抗原。

But Klimasauskas and colleagues wanted the flexibility to attach more than just a simple methyl group.

但是Klimasauskas和他的同事希望这种性质能不仅仅体现在甲基的转移上。

Bromination occur s selectively on the PMS methyl group, providing a reactive benzylic bromine functionality which is the key to Exxpro specialty elastomers′ vulcanization and modification versatility.

溴化反应选择性地发生在PMS的甲基基团上，提供活性苄基溴官能团，这也是Exxpro特种弹性体硫化和各种改性的关键。

Bromination occurs selectively on the PMS methyl group, providing a reactive benzylic bromine functionality which is the key to Exxpro specialty elastomers′ vulcanization and modification versatility.

溴化反应选择性地发生在PMS的甲基基团上，提供活性苄基溴官能团，这也是Exxpro特种弹性体硫化和各种改性的关键。

DCA, or dichloroacetic acid, is an analogue of acetic acid in which chlorine atoms replace two of the three hydrogen atoms on the methyl group.

DCA也叫二氯乙酸或二氯醋酸，是一种类似乙酸的化合物，但乙基团上有两个氢原子被氯原子所取代。

In the presence of catalytic rhodium acetate, ethyl 2-diazo-3-oxo-per fluoroalkanoates, reacted readily with nitriles to give a series of 5-fluoroalkyl substituted 1, 3oxazoles with high regio-selectivity through a metal carbenoid intermediate. The reactions of carbenoids with noncyclic vinyl ethers or cyclic vinyl ethers afforded dihydrofuroates in good to excellent yields. Interestingly, only vinyl C-H insertion compound was obtained concerning of the reaction of carbenoids with 2, 5dimethylfuran due to the steric hindrance of methyl group

醋酸铑分解2-重氮-3-氧代-全氟羧酸乙酯形成的金属卡宾作为1，3-偶极体，可以与一系列芳基或烷基取代的腈反应，高度区域选择性地生成一系列4-乙氧羰基-5-氟烷基取代的噁唑化合物；也可以与富电子的链状和环状的烯基醚反应，以优良的产率得到一系列氟烷基取代的二氢呋喃类化合物；而与2，5-二甲基呋喃的反应，由于甲基的位阻作用，只得到金属卡宾对呋喃3-位烯基碳氢键插入产物。

DNA methylating inhibitor makes the transfer of the methyl group to adenine or cytosine impossible,thus the reaction of DNA methylation is inhibited,the genomic methylation level is decreased.

DNA甲基化抑制剂使甲基基团不能转移到腺嘌呤或胞嘧啶，导致DNA甲基化反应受阻，从而使基因组甲基化水平降低。

"Thymine: Organic compound of the pyrimidine family, often called a Base, consisting of a ring containing Both nitrogen and carbon atoms, and a methyl group."

胸腺嘧啶：一种嘧啶类有机化合物，通常叫做基底，由含有氮和碳原子以及甲基的环形物组成。

Effects of microwave power, reaction time, reaction temperature, solvent etc. on reaction were studied by a single factor tests. The results show that maleic acid is more active than fumaric acid; the introduction of methyl group on the double bond can weak the reactivity of the Michael addition reaction; the ester base is more propitious to complete the Michael addition reaction than the nitrile base.

为研究微波下迈克尔反应的规律，本文采用单模聚焦微波有机合成仪，通过对顺丁烯二酸、反丁烯二酸和氨水合成DL-天冬氨酸、顺式3-甲基丁烯二酸和氨水合成3-甲基天冬氨酸、丙烯酸甲酯和氨水合成β-丙氨酸、丙烯腈和氨水合成β-氨基丙腈等五个反应对迈克尔加成反应进行了研究。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。