丁二胺

Only Cr reacts with DDTC to form a 1: 3 complex which is then extracted with methyl isobutyl ketone and determined by flame atomic absorption spectroscopy.

本文拟定的方法是在pH-4条件下，用二乙胺硫代甲酸钠与甲基异丁基甲酮络合萃取铬，用原子吸收光谱法测定。

Isocyanurate was qualitatively identified by infra-red absorption spectroscopy analysis, the quantity of isocyanurate was calculated according to mass fraction of NCO measured by di-n-butylamine method, the thermal stability of prepared elastomers was characterized by thermogravimetric analysis.

用红外光谱法证实了产物中异氰脲酸酯的存在，根据用二正丁胺法测得的NCO基团的质量分数可计算出异氰脲酸酯的质量分数，用热重法分析了产物的热稳定性。

The desulfurizers (cyclobutyl sulfone and diisopropanolamine) have poisonousness. If the sweetening solution foamed seriously that can't be used, sweetening solution's discharge will affect environment.

脱硫溶液严重发泡后将不能再使用，且脱硫溶剂环丁砜和二异丙醇胺都具有毒性，脱硫溶液的排放将会对环境安全造成严重地影响。

For the above purposes, using a tailored cyanometalate precursor,(1) Tp=hydrotris (pyrazolyl borate; Bu〓N〓=tetrabutylammonium cation , two trinulear complexes,〓(2),〓(3; cyclam: 1, 4, 8, 11-tetraazacyclotetradecane), two one-dimensional polymers,〓(4; dien: diethylenetriamine),〓(5), and a cluster 〓(6) have been synthesized and characterized structurally and magnetically.

基于上述研究热点，我们以修饰的氰基金属化合物(1)为构筑基元（Tp：三吡唑基氢硼烷，Bu〓N〓：四丁基铵离子），合成了两个杂三核化合物，〓(2)，〓（3；cyclam：1，4，8，11-四氮环十四烷），两个一维聚合物，〓（4；dien：二乙烯三胺），〓(5)，和一个十四核簇合物〓(6)。

Therefore, in the laboratory, a 2L gasliquid equilibrium measurement device was used to measure the equilibrium solubility of H2S, CO2, CH3SH and COS in the mixed solutions of Methyldiethanolamine, Tetramethylene sulfone respectively under different temperatures and different proportions. With the relevant parameters being correlated from the measured data, a corresponding thermodynamic calculation model was set up, based on the gasliquid two phase state equilibrium equation, and in combination with the overseas research results.

为此，在实验室利用容积为2 L的气液平衡测定装置，测定了不同温度和溶液配比条件下硫化氢、二氧化碳、甲硫醇、硫氧碳在甲基二乙醇胺（Methyldiethanolamine，MDEA）、环丁砜（Tetramethylene sulfone，TMS）水溶液中的平衡溶解度，并根据气液两相平衡状态方程，结合国外研究成果，利用测定的平衡溶解度数据关联出相关参数，建立了相应的热力学计算模型，用于预测该复杂体系中酸气分压与溶液负荷的气液平衡关系。

This product alone curing slow, usually thiuram disulfide carbamate, aldehyde amines, guanidine type accelerator and used, is an excellent anti-G-CR scorch agents, plasticizers and delay agent .

本品单独使用硫化速度慢，通常和秋兰姆、二硫化氨基甲酸盐、醛胺类、胍类促进剂并用，是G型氯丁胶的优良抗焦烧剂、增塑剂和延迟剂。

In this thermodynamic study, the minimum requirements in molar fraction of the solvents (x3) on the azeotropic feed plate are: 0.20 for N,N-dimethylformamide, 0.36 for 2-ethoxyethanol, 0.40 for 1-pentanol and 0.66 for butyl propionate,.

在这个热力学研究中，共沸混合物喂料盘上各溶剂摩尔分数最小值(x3)分别是：N，N-二甲基甲酰胺：0.20；2-乙氧基乙醇：0.36；1-戊醇：0.40；丙酸丁酯：0.66。

The influence of microemulsion types on resolving power of Eucommia flavonoids was investigated with SDS/n-C4H9OH/n-C7H16/H2O microemulsion as developer on polyamide film.

以十二烷基硫酸钠－正丁醇－正庚烷－水微乳液作为展开剂，通过聚酞胺薄层色谱，研究了微乳液类型对杜仲黄酮分辨率的影响。

Objective The toxicity and synergism of several commonly used insecticide mixtures,and DDVP mixed with synergists,to the larvae of DDVP-resistant Culex pipiens pallens were detected to delay the development of mosquito resistance to insecticides.

目的 为延缓抗性的发展，测定了淡色库蚊幼虫DDVP抗性品系对常用的几种杀虫剂混用后的敏感性及与增效剂氯化胡椒基丁醚(S1)、八氯二丙醚(S2)和增效胺混用的效果。

The result shows that optimized formula: triazophos is 30%; butyl alcohol is 1%~3%; xylene is 3%~5%; DMF is 3%~5%; emulsifier 500(superscript #, NPEPO4, 1602(superscript #) and 400(superscript #) is 17%~20% and water else.

结果表明，优化的配方为：三唑磷30%，丁醇1%~3%，二甲苯3%~5%，二甲基甲酸胺3%~5%，乳化剂（500、NPE-PO4、1602和400按一定比例混合）17%~20%，水余量。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。