二十烷

Self-assembly of PEO-b-PB (M〓of PEO=5100 g/mol and M〓 of PB=5100 g/mol) and poly (PAA, M〓=2000 g/mol) was obtained in THF/dodecane mixtures via PEO/PAA complex. The effect of ratio of PEO-b-PB: PAA was investigated.

通过PEO-b-PB（PEO和PB分子量均为5100g／mol）中PEO链段和聚丙烯酸（PAA，分子量为2000g／mol）的氢键相互作用，我们在THF／正十二烷混合溶剂中获得了PEO-b-PB／PAA的自组装体，并研究了PAA用量对自组装行为的影响。

The extraction equilibrium constants of Nd , Eu , Am in the system of seven monoacidic organophosphorus compounds dodecane 1. 0mol/l NO〓are reported. The dependency of the extractability on the PO〓function group、bonding charactor、metallic ion species and the structure of substitute has been examined.

给出了七个烷基磷酸的正十二烷熔液从1.0mol／lNO〓水溶液中萃取Nd、Eu、Am的平衡分配常数Kex，考察了萃取剂PO〓官能团、萃合物成键特性、金属离子及取代基结构与萃取性能间的关系，发现了：（1）可运用取代基自由能加和模型预测辛基膦酸辛基酯对La、Eu、Nd、Am等三价离子的平衡分配数据。

The results suggest that there are significant fatty acid and amino acid metabolism changes in NASH. Excessive fatty acids accumulation in hepatic cells、ω-6/ω-3 ratio imbalance, dodecanoic acid decreased, and some amino acids contents changes are related to hepatic inflammation and injury.

结果提示NASH大鼠肝组织存在明显的脂肪酸谱和氨基酸谱变化，肝细胞内各类脂肪酸聚积、ω-6：ω-3PUFAs比率失衡、正十二烷酸降低以及某些氨基酸含量变化等可能对脂肪肝炎症发生、肝损伤有重要作用。

The influence of solvent/oil ratio, thinner content and temperature on desulfurization and the distribution coefficient by extraction of a model system for diesel oil with special attention to the solvent furfuryl alcohol was investigated.

以康醇为萃取剂，在正十六烷中加入少量二苯并噻吩构成柴油模拟体系，考察了单级萃取中稀释剂含量、剂油比、温度对脱硫率和分配系数的影响。

The influence of solvent/oil ratio, thinner content and temperature on desulfurization and the distribution coefficient by extraction of a model system for diesel oil with special attention to the solvent furfuryl alcohol was investigated.

以康醇为萃取剂，在正十六烷中加入少量二苯并噻吩构成柴油模拟体系，考察了单级萃取中稀释荆含量、剂油比、温度对脱硫率和分配系数的影响。

In this paper, di-isobutyl oxalate was prepared from oxalic acid and isobutyl alcohol using NaHSO_4 and p-toluenesulfonic acid as catalysts.

以草酸和异丁醇为原料，在酸性催化剂作用下进行酯化反应合成出一种新型柴油十六烷值改进剂——草酸二异丁酯。

The performance of the WD-10 and its main component dodecaalkyl trimethoxysilane were introduced in this article,and the application in the surface protection of the lithoid cultural relic was also brief described.

本文介绍WD - 10及其主体成分十二烷基三甲氧基硅烷的性能，并介绍了在石质文物表面封护中的应

The macrocyclic polyamines are a kind of excellent ligands and have a substantially high binding affinity with transition metal ions. Macrocyclic polyamine metal complexes as enzyme models are widely used in chemical biology, medicine and gene therapy. 1, 4, 7, 10-tetrazacyclododecane is a representative macrocyclic polyamines compound and shows high binding affinity with transition metal ions, such as Zn, Cu and Co. Their metal complexes especially multinuclear complexes were widely used in DNA, RNA recognition.

大环多胺化合物是一类性质独特的优秀配体，具有良好的金属配位能力，其金属配合物作为人工酶模型广泛应用于核酸结构及功能研究、基因表达与调控、抗癌药物的研制等生物、化学和医学领域。1，4，7，10-四氮杂十二烷是典型的大环多胺化合物，对过渡金属离子Zn， Cu and Co有良好的配位能力，这些金属配合物特别是多核金属配合物被广泛应用于DNA识别中。

Thus, in order to attain acetal can be used as precursor of its matrix olefine aldehyde, 2-undecental glycol acetal was synthesized, and the corresponding optimum reaction conditions as: 2-undecental 0.2mol, glycol 0.3mol, cyclohexane as solvent, catalysed by vitamin C, the optium reaction time was 6h, its reaction yield could reach over 77.25%.

为了进一步探求效果更理想的前体化合物，本文继续合成了2-十一烯醛乙二醇缩醛，通过单因素优化实验得到最佳反应条件为：环己烷作溶剂，VC作催化剂，用量0.42%，醛醇物质的量之比0.2：0.3，反应时间6h，此条件下产品收率达77.25%。

The measurement of apparent volume change is described during cure reaction of a new spiro ortho -carbonate, 3, 9, di (p-methooxybenzyl)- 1, 5, 7, 11-tetraoxspiro (5,5) undecaneand epoxy resin, and the volume expansion ratio of this new monomer is culcu-lated,and its applications are approached.

叙述了新的螺环化合物3，9-二-1，5，7，11-四氧杂螺环[5，5]十一烷与环氧树脂进行固化反应时，其表现体积变化率的侧定方法，推算了这种新单体的体积膨胀率。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。