查询词典 methyl

The compound HCB-01712-2 has been isolated from the broth of Claviceps HCB-01712,by the analyses of its physico-chemical properties,UV,ESI-MS and NMR spectra data,the structure of HCB-01712-2 has been identified as methyl vanillate.

从麦角菌(Claviceps sp。)HCB-01712的发酵液中分离纯化得到化合物HCB-01712-2，经理化分析、紫外吸收、质谱及核磁共振谱分析，确定该化合物为香草酸甲酯。

Using the addition method of index in aquatic toxicity, compared the acute and joint toxicity of methyl parathion and chlorpyrifos to Skeletone macostatum Cleve .

e# 采用水生毒理联合效应相加指数法，比较了有机磷农药甲基对硫磷和毒死蜱的单剂和混合剂对中肋骨条藻的急性毒性和联合毒性。

The results showed that the toxicity of the organophosphorus pesticidesto the mecroalgae is in the order of chlorpyrifos %26gt;methyl parathion, and the two OPPS show synergism on their joint toxicity in 96 hrs to Skeletone macostatum Cleve.

结果表明摘要：两种有机磷对中肋骨条藻的毒性大小为摘要：毒死蜱%26gt；甲基对硫磷；两种有机磷混合溶液对中肋骨条藻的联合毒性 96h 内均为协同效应。

The major compone- nts were: linalool,benzyl acetate,cis-caryophyllene,cis-3-benzyl benzoate,methyl an- thranflate and indole.These results show the components of the extract have no qualita- tive difference from absolute oil.

在植物的易挥发成分的采集方法中，由Likens和Nickerson在1966年发展起来的同时蒸馏一萃取，'法(sDE，simul：aneous distillation and solvent extraetion)〔7，，国际上目前应用得比较多。

Surface modified magnetic particles were compositely coated by transition liquid and then dispersed in 2-methyl silicon oil to prepare silicon-oil-based magnetic liquid .

用过渡液对改性后的磁微粒进行复合包覆，然后分散在2-甲基硅油中可得到硅油基磁性液体。

In this investigation,the composition of copolymer P(AM- co -NaAMPS) of acrylamide and 2-acrylamido-2-methyl-propanesulfonate sodium has been determined with the aqueous solution of cetyl trimethyl ammonium bromide as titrant at a concentration of 0.001 mol·L-1 by conductometric titration method.

与元素分析进行比较的结果表明，上述复合作用电导滴定法可作为测定水溶性大分子链中磺酸盐单体含量的方便而又准确的方法，而且预计还可用作为测定水溶性大分子链中其它离子性基团含量的简捷方法。

The target compounds were obtained in high yield through Michael conjugative addition of amines to methyl acrylates, cyclocondensation of the obtained diadducts in the presence of sodium methoxide,and decarboxylation of the cyclocondensation products in acid.

以胺类化合物为原料，与丙烯酸甲酯经过两次Michael加成得到N，N 二丙酸甲酯类化合物，该化合物在甲醇钠存在下进行环合，在酸性条件下脱羧，高收率得到4 哌啶酮类化合物，从而证明了这是一条合成N 取代 4 哌啶酮类化合物的普遍方法。

Using pyridine-2, 6-dicarboxylic acid as starting material, a novel ligand N^2, N^6-bis(3-methyl-pyridine-2-yl)-pyridine-2, 6-dicarboxamide was synthesized, which contained multidentate and large conjugative system.

以吡啶－2，6-二甲酸为原料，合成含有多个共轭体系多齿配体N^2，N^6-二（3-甲基吡啶）－2-取代吡啶－2，6-二甲酰胺；同时制备它与稀土离子Tb和Eu的配合物，并培养出单晶。

Various mole ratios of acrylonitrile and methyl methacrylate were used to copolymerize in aqueous solution by Redox and the copolymers were obtained. The copolymers containing MOCT were synthesized by adding MOCT before copolymerization. The copolymer were derived from the copolymerization of AN and MMA in 30L kettle and then were mixed with various contents of MOCT, the copolymer films were cast by solution of the copolymer containing MOCT.

本课题采用不同摩尔比的丙烯腈和甲基丙烯酸甲酯进行水相沉淀聚合，制备了AN／MMA共聚物；在聚合阶段加入正十八烷微胶囊，制得了正十八烷微胶囊含量不同的共聚物；选择合适的条件进行大釜聚合，得到共聚物后与不同比例的正十八烷微胶囊混合，通过流延制得正十八烷微胶囊含量不同的共聚物膜；并尝试进行了纺丝实验。

The model mice were then treated by giving GDNF into the striatum. After a seven-day survival period, the model mice were sacrificed to get the segment of substantial nigra fixed, embedded and coronally sectioned continuously. The microsections were processed by immunohistochemistry using anti -TH and anti-CB antibodies to label DA neurons and CB-containing neurons respectively, which were counted under microscope and analyzed statistically.

利用1-甲基－4-苯基1，2，3，6-四氢吡啶(1-methyl-4-phenyl-1，2，3，6-tetrahydropyridine，MPTP)制备成年小鼠PD模型，通过单侧纹状体定位注射GDNF，取中脑黑质节段，做连续冠状石蜡切片，结合免疫组织化学染色方法，观察各组酪氨酸羟化酶(tyrosine hydroxylase，TH)、钙结合蛋白(calbindin D28k，CB)的表达，光镜观察并细胞计数，统计学分析。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。