查询词典 ethyl

Any of several esters, other than the ethyl ester, of carbamic acid.

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In spite of this, the preparation of thiol-end functionalized PMMA was achieved by introducing a short block of polystyrene after the RAFT polymerization of MMA.Third, RAFT technique was applied to design and synthesize some well-defined poymers. Five monomers, lauryl methacrylate,(N,N-dimethylamino)ethyl methacrylate, poly methyl ether methacrylate, 4-(4\'-cyanobiphenyl-4-yloxy) butyl methacrylate and 2-ethyl methacrylate were chosen to RAFT homopolymerization or copolymerizations mediated by cumyl dithiobenzoate.

RAFT方法在具有特定结构聚合物的设计与合成上的应用，在机理研究的基础上，本论文选择五种不同结构的甲基丙烯酸酯类单体：lauryl methacrylate，(N，N-dimethylamino)ethyl methacrylate，polymethyl ether methacrylate，4-(4'-cyanobiphenyl-4-yloxy)butyl methacrylate和2-ethyl methacrylate，用CDB调控RAFT聚合的方法设计合成了一些特定结构的聚合物，详细而深入地研究了它们的均聚、共聚动力学，发现了双硫酯并非在聚合反应初期就全部转化，而是随着反应进行逐步消耗，这与理想的活性聚合体系有很大差别。

After 3 months storage, our result showed that (1) color a value of rose liqueur with sucrose treatment had a slower decreased than with fructose treatment,(2) the sample added with caffeic acid or ferulic acid or tea polyphenol showed no significant difference in the color, anthocyanins content, and antioxidant capacity during storage as compared to control, and (3) the total amount of volatile compounds of rose liqueur decreased gradually, however there was one ester volatile formed, hexadecanoic ethyl ester, during storage.

贮藏三个月发现，(1)以果糖勾兑者在储藏试验中，其红色度下降速度较以蔗糖处理者快，建议仍以非还原糖进行勾兑对日后酒液保存较易，且酒液最好能予以避光包装，以避免颜色品质的下降；(2)添加不同之多酚类化合物时发现，添加caffeic acid、ferulic acid和茶多酚对酒液色泽、花青素含量、以及抗氧化能力之降低速度与控制组并无显著性的差异。(3)酒液储藏三个月后，其香气高级醇均有减少之趋势；但有hexadecanoic acid， ethyl ester酯类出现。

A(C2H5)3N·HCl-induced palladium complex PdL2Cl2 and CuCl2 catalyzed cyclotrimerization reaction of Ethyl Propiolate has been reported for the first time.

报道了一类三乙胺盐酸盐存在下钯PdL2Cl2-CuCl2催化体系催化的丙炔酸乙酯(Ethyl Propiolate，简称EP)环三聚反应。

In the first part, five new 4-acyl pyrazolone 4-ethyl-thiosemicarbazones compounds: 1-Phenyl-3-methyl-4-(4-bromo)benzal-pyrazol-5-one N(4)-ethyl-thiosemicarbazone (PM4Br BP-ETSC), 1-Phenyl-3-methyl-4-(4-methyl)benzal-pyrazol-5-one N(4)-ethyl-thiosemicarbaz -one (PM4MBP-ETSC), 1-Phenyl-3-methyl-4-benzal-pyrazol-5-one N(4)-ethyl-thiosemicarba -zone, 1,3-diphenyl-4-benzal-pyrazol-5-one N(4)-ethyl-thiosemicarbazone and 1-Phenyl-3-methyl-4-phenylacetyl-pyrazol-5-one N(4)-ethyl-thiosemi -carbazone have been synthesized and characterized by elemental analyses, IR, 1H NMR spectra and single-crystal XRD.

第一部分合成了五个4-酰基吡唑啉酮缩4-乙基-氨基硫脲化合物：1-苯基-3-甲基-4-（4-溴）苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲(PM4BrBP-ETSC)，1-苯基-3-甲基-4-(4-甲基)苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲(PM4MBP-ETSC)，1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲，1，3-二苯基-4-苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲和1-苯基-3-甲基-4-苯乙酰基-5-吡唑啉酮缩4-乙基-氨基硫脲，其中前四个具有光致变色性质。

Objective: To study the effect of Rhynchosia volubilis Lour ethyl acetate extract on male mouse procreation and analyse their chemical composition.

中文摘要：目的：研究鹿藿醋酸乙酯提取物( Rhynchosia volubilis Lour ethyl acetate extract，RVLEAE)的抗生育作用及化学成分分析。

Ethyl cellulose membrane material has produced in physical modification method. The fundamental characteristics of reverse osmosis on EC membrane can be correlated with HPLC experimental conditions. By using EC membrane material as column packing, double-distilled water as mobile phase, the retention times are measured with suitable inorganic and organic compound as solutes.3. Complying with the retention times, the partition coefficient of the solute and the ratio of the surface excess concentration of solutewith the concentration of the parent fraction are calculated .

利用物理改性的方法研制了乙基纤维素(Ethyl Cellulose，简称EC)膜材料，并将其作为高效液相色谱柱的固体填料，以高效液相色谱模拟反渗透实验平衡条件，以水为流动相，选择合适的无机物和有机物作为溶质，测定乙基纤维素对它们的相对保留时间及平衡分配常数K_A′。3。

Methods: The phenyl ethyl alcohol odor detection threshold test was used to evaluate the olfactory thresholds of normal non-smoking Chinese young people.

我们使用酚基乙基乙醇(Phenyl ethyl alcohol， PEA)嗅觉阈值试验的方法来评估正常不吸烟中国年轻人的嗅觉阈值。

Ethyl carbamate, a known genotoxic compound, is mainly found in grape wine and other alcoholic beverages.

氨基甲酸乙酯（Ethyl Carbamate， EC）是一种基因致癌物，葡萄酒及其他酒精饮料中含有微量的氨基甲酸乙酯。

Ethyl carbamate,a known genotoxic compound,is mainly found as a natural trace constituent in wine and other alcoholic beverages.

氨基甲酸乙酯(Ethyl Carbamate，EC)是一种基因致癌物，葡萄酒及其它酒精饮料中含有微量的EC。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。