查询词典 chemical compound

Additionally, 75 volatile chemical constituents have been identified from the petroleum ether extracted part by capillary GC-MS, and the relative percentages of them are determined by GC method. The result showed that the volatile constituents of Musella lasiocarpa mainly includes advanced alkane, aliphatic acid and ester, aldehyde, ketone, aromatic and its heterocyclic compounds. With the compounds that have been isolated and identified from Musella lasiocarpa, the biogenensis pathway of new compound MT-3 is approached. Furthermore, the bacteriostasis of the 6 compounds to Escherichia coil, Pseudomonas aerusinosa, Bacillus megaterium, Sarcina lutea and Bacillus subtilic are determined by flat dilution method.

此外，从其石油醚萃取部分用毛细管色谱法分析鉴定出75种挥发性化学成分，并测定了各组分的相对百分含量，结果表明，地涌金莲挥发性化学成分以高级烷烃、高级脂肪酸酯及醛、酮、芳香和芳香杂环化合物为主；根据从地涌金莲中鉴出和分离得到的化合物，探讨了新结构化合物MT-3的生源代谢途径；采用平板稀释法测定了地涌金莲中六种化学成分对大肠杆菌、绿脓杆菌、巨大芽孢杆菌、藤黄八叠球菌和枯草芽孢杆菌的抑菌作用。

" Carbide: Inorganic compound, any of a class of chemical compounds in which carbon is combined with a metal or semimetallic element."

碳化物：碳与金属或半金属元素化合而成的一类化合物的总称。

In order to protect domestic farm fertilizer needs such as ureal, Mono-ammonium phosphate fertilizers export duties levied on seasonal, continue to compound fertilizers sections to impose special export duty chemical fertilizer.

为保障国内农业生产用肥的需要，继续对尿素、磷酸铵等化肥征收季节性出口关税，继续对复合肥等部分化肥征收特别出口关税。

A chemical or chemicals viewed from the perspective of their structural characteristics. Included here are concepts which can mean either a salt, an ion, or a compound (e.g.,"Bromates" and "Bromides").

根据其结构特性划分的一种或一类化学物质，包括某种盐，某种离子或某种化合物，如溴酸盐及溴化物。

The feature of urea base compound fertilizer prilling process is introduced, the effecting factors and control mode of prilling with granule method are also discussed from the aspects of granule size of prilling material, liquid phase required amount, chemical reaction heat and prilling temperature etc.

介绍尿基复肥造粒工艺的特性，从造粒物料的粒度、液相需量、化学反应热和造粒温度等方面论述了团粒法造粒的影响因素及调控方

Then polymer latexes coated the silica particles through carboxyl chemical bond adsorption;When the compound temperature(25℃) was lower than Tg(45℃) of polymer,latexes remained their basic shape,and silica nanoparticles adhered to the surface of latex particles.

目前国内外制备复合纳米SiO2微球的主要方法是通过硅烷偶联剂对SiO2进行预处理，使其接枝在粒子表面，然后通过乳液聚合[5，6]、溶胶凝胶法

College of Chemical Engineering, Guizhou University, Guiyang Guizhou 550003, ChinaAbstract:In the course of polymerization of tung oil modified phenol aldehyde resin, by adding some SiO2 nanometer particles which have been scattered, compound modified heat-curable NTPF was made.

在桐油改性酚醛树脂的聚合过程中，添加经过分散的SiO2纳米粒子，制备成复合改性的热固性NTPF，经过SETARAMTG-DSC92-16热分析仪测试NTPF的耐热性有明显的提高。

By using chemical modification, ammonium persulphate as thermal initiator, SDS/OP-10 as the compound emulsifier, through emulsion copolymerization with organic silicon monomer(KH-570) and acrlates monomers, the silicone-modified polyacrylate emulsion with excellent properties was synthesized.

本文利用化学改性的方法，在过硫酸铵热引发体系、十二烷基硫酸钠/OP-10复合乳化体系下，通过有机硅单体（KH-570）与丙烯酸酯类单体进行乳液共聚，得到了综合性能良好的有机硅改性丙烯酸酯乳液。

In order to develop and popularize organic-inorganic compound fertilizer for vegetablecrops, the effects of chemical nitrogen fertilizer application rate on yield and quality (nitratecontent, protein content, soluble sugar content, rough fiber content and Vitamin C content) of 4vegetables(Water spinach, Asparagus lettuce, Pak-choi, Radish)and nitrogen fertilizerutilization ration have been studied by pot experiment using ~(15)N trace technique.

中文摘要：为开发和推广蔬菜有机-无机专用复混肥，本文采用盆栽试验和~(15)N标记示踪技术探讨了化学氮肥用量对4种蔬菜(蕹菜、莴苣、小白菜、萝卜)产量、品质(硝酸盐、蛋白质、可溶性糖、粗纤维、维生素C含量)及氮肥利用率的影响，在保证蔬菜高产、优质、低污染的前提下，权衡化学氮肥用量与蔬菜产量、品质和化学氮肥利用率之间的关系，得到了4种蔬菜合理的化学氮肥用量。

A new organic compound:N,N'-bis(1,10-phenanthroline-2-formacyl)-4,4'-diamino-diphenylmethane was synthesized via oxidation,esterification,substitution,hydrolysis, amidation of 1,10-phenanthroline as the starting material with chemical reagents (hydrogen peroxide,benzoyl chloride,potassium cyanide,sodium hydroxide solution,4,4'-diamino-diphenylmethane).

以邻菲啰啉为起始原料，与双氧水反应合成邻菲啰啉-N-氧化物，接着与苯甲酰氯、氰化钾、NaOH水溶液一一反应合成中间体邻菲啰啉-2-甲酸，再与4，4′-二氨基苯基甲烷进行酰胺化反应合成目标产物。

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。