查询词典 methyl group
- 与 methyl group 相关的网络例句 [注:此内容来源于网络,仅供参考]
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A series of polymers containing 1,8-naphthalimide moieties in the side chains have been prepared via RAFT technique. Firstly, five styrene and two methyl acrylate based 1,8-naphthalimide monomers were synthesized and characterized. Then, carbazyl group terminated polystyrene was used as macromolecular RAFT agent.
我们合成了5种苯乙烯类和2种甲基丙烯酸酯类萘酰亚胺单体,以一种含末端带咔唑结构的聚苯乙烯为大分子RAFT试剂,考察了所得单体的RAFT聚合,发现苯乙烯类1,8-萘酰亚胺单体可以聚合,但是聚合度不高,甲基丙烯酸酯类1,8-萘酰亚胺单体RAFT聚合不可控。
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Organic our country high polymer flocculant already has commercialized at present having several breeds such as PAM , polypropylene acidamides and carboxyl methyl cellulose only , studies innocuous high-effect organic synthesis high polymer flocculant (the ammonium equality gathers the sum copolymer kind if alkyl alkene propyl group halogenates waiting), optimizes it's the cost reduction composing handicraft.
目前我国有机高分子絮凝剂已商品化的仅有PAM、聚丙烯酰胺和羧甲基纤维素等几个品种,研究高效无毒的有机合成高分子絮凝剂(如烷基烯丙基卤化铵的均聚和共聚物类等),优化其合成工艺降低成本。
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According to the results of the examination, the stronger the electron-withdrawing protective group of imines, the better the cis-selectivity of the reaction, 68% yield, trans:cis is 99:1 diastereoselectivity could be leaded by Ts-imines (4-methyl-N-methylene-benzenesulfonaides) with a substituent [2,4-(CH3O)2C6H3], Substrate scope investigation revealed that a wide variety of ketenes and imines could react smoothly to afford corresponding,β-lactams.
实验结果表明,亚胺的保护基团吸电子能力越强,越有利于顺式产物的生成。对甲苯磺酰基保护的取代基为2,4-二甲氧苯基的亚胺参与的该反应可得到68%的产率,反式:顺式=99:1的非对映选择性。底物拓展过程中发现Staudinger反应适用于多种不同的亚胺与烯酮。
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Codeine has the same structure as morphine, but the phenol group is masked as a methyl ether.
可待因也有和吗啡相同的结构,但是酚基被甲基醚屏蔽了,结果。
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Naturally occurring terpenes constitute the largest group of natural products with complicated and variable structures and a great number of important biological activities.2-Methyl-D-erythreitol 4-phosphate pathway is a newly found and established biosynthetic route for terpenoids and all the enzymes involved in this pathway can be used as targets for the screening of new antibiotics.
萜类化合物构成了最大的一个天然产物家族,结构复杂多变,且有许多重要的生理活性。2-甲基-D-赤藓糖醇4-磷酸途径是近年来发现并建立的一条萜类化合物的生物合成途径,其中所涉及到的酶均可作为靶标来进行新抗菌素的筛选。
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Then dendrimer-like polyamidoamine on the silica gel surface was prepared using Micheal addition of the amino and methyl acrylate,and ester-exchange of ethylene diamine and the ester group.
用硅烷偶联剂对硅胶表面进行氨基功能化,利用氨基与丙烯酸甲酯发生的Michael加成反应和乙二胺与酯进行的交换反应在硅胶表面合成了聚酰胺-胺树状大分子。
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The effect of molecular weight, ethylene group and mixing of polyketone on the photodegradability were investigated. The mechanism of the photodegradation of ESTCO, STCO, STCO-PS and ESTCO-PS were reviewed. In addition, the block polymerization of methyl methacrylate initiated by STCO under UV irradiations was also studied.
研究了乙基取代基、分子量及共混物对聚酮光降解性能的影响,探索了STCO、ESTCO及其分别与聚苯乙烯共混物STCO-PS、ESTCO-PS的光降解行为和光降解机理,初步探讨了聚酮ESTCO光降解所产生的大分子自由基引发的甲基丙烯酸甲酯的聚合。
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Then dendrimer-like polyamidoamine s based on the silica gel surface were prepared using Micheal addition of the amino and methyl acrylate,and ester-exchange of ethylene diamine and the ester group.
用硅烷偶联剂对硅胶表面进行氨基功能化,利用氨基与丙烯酸甲酯发生的Michael加成反应和乙二胺与酯进行的交换反应在硅胶表面合成了聚酰胺-胺树状大分子;利用红外光谱对PAMAM-SG的结构进行了表征,研究了溶液pH值、ρ(Ni2+)和温度对PAMAM-SG吸附Ni2+能力的影响。
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Amino functional silica gel was synthesized by reacting silane coupling agent with silica gel. Then dendrimer-like polyamidoamine on the silica gel surface was prepared using Micheal addition of the amino and methyl acrylate, and ester-exchange of ethylene diamine and the ester group.
用硅烷偶联剂对硅胶表面进行氨基功能化,利用氨基与丙烯酸甲酯发生的Michael加成反应和乙二胺与酯进行的交换反应在硅胶表面合成了聚酰胺-胺树状大分子。
- 推荐网络例句
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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。
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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。
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Detailed Intrinsic Reaction Coordination calculations were carried out to guarantee the optimized transition-state structures being connected to the related tautomers.
同时,做了详尽的内禀反应坐标计算,以保证所得到的过渡态连接相应的始末异构体。