二-十进制

A Raney nickel catalyst for hydrogenation of dodecyl dinitrile to dodecyl diamine was chosen on the basis of experiment.

通过试验，优选了十二碳二腈加氢制十二碳二胺用骨架镍催化剂。

Microcalorimetry was applied to follow the toxic effects caused by different diphenol compounds on microbial activity of Chinese fir soil.

用微量量热技术分析了三种二酚类化合物(邻苯二酚、间苯二酚、对苯二酚)对土壤微生物活性的毒性作用。

The surface action mechanism of sodium polydithio dipropyl sulfonate in acidic Cu plating bath indicates that the surface complex produced by adsorbed sodium polydithio dipropyl sulfonate and Cu + resists copper ions' electrodeposition.

酸性镀铜溶液中表面活性剂聚二硫二丙烷磺酸钠的表面作用机理表现为：吸附态的聚二硫二丙烷磺酸钠与Cu＋形成表面络合物阻化铜离子的电沉积。

Superior chemical stability was found for both glass-ceramics before or after heat-pressing.7. In this experiment, all-ceramic restoratives were made with experimental lithium disilicate glass-ceramic using dental heat-pressing technique.

结果表明：热压铸对实验二硅酸锂玻璃陶瓷的晶相组成和晶体含量无显著影响，热压前后玻璃陶瓷均是以二硅酸锂为主晶相；热压后二硅酸锂晶体尺寸轻度增大，呈现出一定程度的定向排列趋势；热压前后实验二硅酸锂玻璃陶瓷均表现出良好的化学稳定性。7。

spectrophotometric method with phenol disulfonic acid ; ultraviolet spectrophotometer ; nitrate nitrogen ; comparison

本文通过对常用的酚二磺酸光度法和紫外分光光度法进行实验比对，同时调查云南省内两种分析方法考核的情况，从而找出两种方法的优缺点，供分析人员在实践中借鉴。l原理1.1酚二磺酸光度法测定的原理方法依据：GB7480一87《水质硝酸盐氮的测定酚二磺酸分光光度法》。用浓硫酸与苯酚作用生成酚二磺酸

Twenty compounds have been isolated and structure-elucidated, ten of which were new compounds including one new skeleton diterpene malloapeltin A, 5 cembrene-type diterpenes, two dolabradane-type diterpenoids, one triterpene ester malloapeltin B and one coumarinolignoid compound 5'-demethyl aquillochin.

其中有10个是新化合物，包括一个新骨架的二萜，五个枯烯类的二萜，两个罗柏烷型的二萜，一个三萜的对苯二甲酸酯和一个香豆素木脂体类化合物。

Bis vinyl phenyl terminated polydimethylsiloxane was synthesized by the hydrosilylation of bis dimethylhydrogen siloxyl terminated PDMS with m divinyl benzene. The structure of the VTPDMS was characterized by 1H NMR.

通过双二甲基氢硅氧封端的聚二甲基硅氧烷与间二乙烯基苯的硅氢加成反应制备了双乙烯基苯封端的聚二甲基硅氧烷，用1H NMR对其结构进行了表征。

Both hexanitrohexaazatricyclododecanedione and hexanitrohexaazatricyclotetradecanedifuroxan are the typical representatives of fused ring-nitroamine. 4, l0-Dinitro-2, 6, 8, 12-tetraoxadiazatetrocyclo [5.5.0.0^(5.9). 0^(3.11)] dodecane is the typical representative of cage nitroamine.

六硝基六氮杂三环十二烷二酮和六硝基六氮杂三环十四烷并双氧化呋咱是稠环硝胺化合物中的典型代表；4， 10-二硝基－2， 6， 8， 12-四氧杂－4， 10-二氮杂异伍兹烷是笼形硝胺化合物中的典型代表。

Our company is mainly engaged in chemical raw materials trading, the company mainly engaged in: toluene, xylene, mesitylene, durene, 6 # 120 # 200 # solvent, ethyl acetate, butyl acetate, acetone, butanone, cyclohexanone, isophorone, MIBK, isopropyl alcohol, isobutyl alcohol, butanol, mixed alcohols, methanol, ethanol, ethylene glycol, diethylene glycol, diacetone alcohol, Anti-White Water, CAC, n-hexane, dichloromethane, trichloro-B, DMF, 5 # 10 # 15 # white mineral oil, lubricating oil, sewing machine oil, as well as high-pressure polyethylene, linear polyethylene, low-pressure polyethylene, polypropylene, rubber and other chemical raw materials.

我公司主要从事化工原料贸易，公司主要经营：甲苯、二甲苯、三甲苯、四甲苯、6# 120# 200#溶剂、醋酸乙酯、醋酸丁酯、丙酮、丁酮、环已酮、异佛尔酮、MIBK、异丙醇、异丁醇、正丁醇、混丙醇、甲醇、乙醇、乙二醇、二甘醇、二丙酮醇、防白水、CAC、正已烷、二氯甲烷、三氯乙、DMF、5# 10# 15#白矿油、润滑油、针车油以及高压聚乙烯、线性聚乙烯、低压聚乙烯、聚丙烯、橡胶等各种化工原料。

All the complex series based on 4',4''-dicarboxy-1,6-diphenoxyhex- ane (C6-2COOH) and 4',4''-dicarboxy-1,10-diphenoxydecane (C10-2COOH) possessed higher melting and clearing points, usually showed soft crystal or crystalline smectic phases and crystal polymorphs except C10-2COOH/ p -PhBPy complex displaying also an enantiotropic nematic phase, while the complexes based on 4,4'-dicarboxy-α,ω-diphenoxy tetraethyleneglycol ether (C8O4-2COOH) with a longer flexible spacer exhibited monotropic fluidic smectic SmA and/or nematic phases.

研究表明，分别具有较短的6或10个亚甲基的烷烃间隔基的双苯甲酸衍生物4'，4''-二羧酸-1，6-二酚氧基己烷(C6-2COOH)和4'，4''-二羧酸-1，10-二酚氧基癸烷(C10-2COOH)的系列复合物具有较高的熔点和清亮点，一般都只出现结晶近晶相和多晶型转变现象。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷