二丁基的

The method is characterized in that: mixture of macromolecular dihydric alcohol and a dihydroxybutyl-terminated polydimethylsiloxane is dehydrated, added with diisocyanate for reaction, then added with a bis propionic acid, a dihydric alcohol chain extender and a catalyst - dibutyl tin laurate, and is diluted by acrylic ester; temperature reduction and emulsion are performed on the mixture after reaction; chain extension reaction is performed in water by a multi-amine chain extender, and siloxane modified polyurethane dispersoid which contains acrylic ester monomer is prepared; and an initiator - potassium persulphate is added into the siloxane modified polyurethane dispersoid for emulsion polymerization.

特征是先将大分子二元醇与二端羟丁基聚二甲基硅氧烷的混合液脱水后加入二异氰酸酯，反应后加入二羟甲基丙酸、二元醇扩链剂和催化剂二月桂酸二丁基锡，并用丙烯酸酯进行稀释，反应后降温乳化，用多元胺扩链剂在水中进行扩链反应，得到含有丙烯酸酯单体的硅氧烷改性聚氨酯分散体，然后再通过加入引发剂过硫酸钾进行乳液聚合。

Both of them showed no toxic effect on mice at the testing dose of 10 mg/kg. The 2,2-diphenyl-1-picrylhydrazyl free radical scavenging test showed that both of the formicary extracts were potent radical scavengers and their scavenging activities were dose-dependent. Furthermore, at higher concentrations (5～10 mg/ml) both of them exhibited significantly higher DPPH scavenging activity than butylated hydroxytoluene.

二苯基三硝基肼(1，1-diphenyl-2-picrylhydrazyl ，DPPH)自由基的清除能力的检测表明：两种蚂蚁窝甲醇提取物都具有显著的自由基清除能力，并呈现出剂量依赖性，而且，在高浓度时(5～10 mg·mL-1)，它们的自由基清除能力甚至显著地高于二丁基羟基甲苯(butylated hydroxyl toluene，BHT)。

The catalytic effect of dibutyltin dilaurate on the thermal dissociation of blocked isocyanate crosslinkers was also discussed.

运用DSC，研究了二月桂酸二丁基锡对TDI封闭物解封温度的影响。

The excess of ethyl orthosilicate should render the chain terminal unreactive toward the crosslinking...

降解是由于水在二月桂酸二丁基锡酯或它的水解产物月桂酸催化下使聚二甲基硅氧烷主链的Si—O—Si键水解所引起的。

N,N′-Disubstituted ureas,used as intermediates for synthesis of pesticides,resin precursors and carbamates,were synthesized from carbon dioxide and primary amines(namely n-propylamine, n-butylamine ,n-amylamine,n-hexylamine,benzylamine and aniline) over organic base catalysts.

以正丁胺为反应基质、TBD为催化剂，合成N，N′-二丁脲的最佳反应条件为：反应温度180℃，CO2压力10.0M Pa，反应时间10h，TBD摩尔分数5.0%；在此条件下，N，N′-二丁脲的收率为81.8%；红外光谱表征结果表明，合成的产物为N，N′-二丁脲。

The interaction of tributyltin, the main components of antifouling paint of ships, and its degradation products of monobutyltin and dibutyltin with human serum albumin was investigated by ultraviolet, fluorescence and circle dichromism spectra. The influences of the concentration, acidity, organic solvent such as ethanol and ionic strength on the interaction of butyltin compounds and HSA molecule were examined to find that the interaction of butyltin compounds and HSA was dual.

通过紫外、荧光和CD光谱，研究了船体防污漆中主要防污成分——三丁基锡化合物及其降解产物——一丁基锡和二丁基锡与人血清白蛋白相互作用的方式与程度，考察了浓度、酸度、有机溶剂和离子强度等因素对相互作用的影响。

Apple polyphenol extracts had stronger deoxidizing capacity, antioxidant activity and scavenging effects on superoxide an...

苹果多酚提取物具有较强的还原能力和抗氧化活性，对脂质过氧化产生的超氧阴离子自由基具有较强的抑制作用，且在试验浓度范围内其最大抑制率优于同浓度二丁基羟基甲苯的效果。

A four-ball tester was used to evaluate the load carrying and antiwear properties of bismuth dibutyldithiocarbamate,bis-dibutyldithiocarbamates(V7723),sulfurized isobutylene,molybdenum ester non sulfur and phosphorus in a mineral oil respectively and their synergistic effects.

利用四球试验机评价了二丁基二硫代氨基甲酸铋与二丁基二硫代氨基甲酸酯(V7723)、硫化异丁烯和非硫磷钼酸酯添加剂的极压和抗磨性能，以及它们之间的极压和抗磨协同作用。

In the contaminated lard sample, 6 organic compounds have been thus identified to be the raw materials or byproducts in the production of organic tin compounds. Based on the identified contaminants, it can be postulated that the chemical structure of the organic tin compound is dibutyltin-bis-(2-isooctyl thioacetate). The method is simple and precise, and has not been reported in the local literature.Keywords Organic tin compound, Lard, SPME－GC－MS

经过摸索研究，采用固相微萃取方法富集挥发性杂质，直接注入色谱中，经色谱分离，质谱测定，确定了杂质的结构，由杂质成分推断生产有机锡所用的原料，然后判断合成路线，最后确定有机锡的结构，从有毒猪油中鉴定出2－巯基醋酸异辛酯、双（2－醋酸异辛酯）二硫、双醋酸异辛酯硫醚等6种与有机锡有关的杂质，并与相应的有机锡工业品对照，发现工业品中也含有这些杂质，与其合成过程的原料及副产物相符，从而确定有机锡化合物为二硫代醋酸异辛酯二丁基锡。

The results showed 3 types of aluminum compound prepared in this paper all had good poison protection effectiveness on such impurities as stannous chloride,lead oxide,sodium hydrogen sulfate,and so on.Moreover,the mechanism of the poison of catalyst was also discussed.

结果表明，合成的3种防中毒剂即防－1、防－2(主要成分为乙酰丙酮合铝)及防－3(主要成分为二乙酰丙酮基异丙氧基铝)对二月桂酸二丁基锡、氯化亚锡、二正丁胺、硫脲、氧化铅及硫酸氢钠等杂质均有较好的防中毒作用；不同防中毒剂对不同杂质的防中毒作用有一定的选择性。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。