丁酸

This is a special reaction of arginine's carbamidine, which is useful in quantitating and determining the natures of protein and the amino acid.

这是由于蛋白质分子中精氨酸胍基的特征反应。许多胍的衍生物如胍乙酸、胍基丁胺等也发生此反应。

Stearic acid and tetrabutyl titanate were used to improve the hydrophobicity of antimony doped tin oxide nano-powders .

摘 要：用硬脂酸/钛酸四丁酯复合改性剂对掺锑二氧化锡纳米粉体进行表面有机化改性处理。

Result: SC was an effective and safe absorption enhancer. However, the absorption enhancement effects of clove oil, peppermint oil and Maidong saponins were highly correlated with their cytotoxicity.

结果：癸酸钠是既有效又安全的吸收促进剂，而丁香油、薄荷油、麦冬皂苷的吸收促进作用与细胞毒性高度相关。

As superplasticizer , a series of comb-shaped copolymers of polycarboxylic acid were synthesized by polyoxyethylene allyl methyl diether, maleic anhydride, and styrene with different initiators,and esterified with PEO-n.

以聚氧乙烯甲基烯丙基二醚、顺丁烯二酸酐、苯乙烯等为共聚单体，采用不同引发剂，合成了一系列聚羧酸型梳状共聚物超分散剂，并以PEO n单酯化得酯化产物，研究了共聚物的结构、组成、添加量等对水泥粒子分散性能的影响。

In the end, the synthesis condition and influential factors of PU-titania (TiO2) process, such as manufacturing sol (including the amount of water, the amount of PU/Titanium butyrate, the concentration of the solution, the pH value, the kind of alcohol), aging process, theoretical analysis of the dipping process, dry and heat treatment of the gelation, were also discussed especially. FT-IR、SEM、TEM、DLS techniques were applied to analyze and study the reaction mechanism and watch the surface and section of the PU-TiO2 membrane. According to above, it was inferred that PU-TiO2 membrane (containing K600) was better composite.

本文采用原位合成法制备了聚氨酯-二氧化钛水分散复合体，并着重对影响制备稳定透明的复合体的因素（包括加水量、醇的加入量、pH值、聚氨酯/钛酸四丁酯投入量、醇种类）进行讨论，利用红外光谱技术分析聚氨酯-二氧化钛分散复合体的结构，动态光散射技术与扫描电镜分别表征复合分散体的粒径大小与分布及复合膜的表面形态，结果显示含K600的聚氨酯-二氧化钛体系复合情况良好。

The rutile TiO2 powder photocatalyst was prepared by hydrolysis process, and it was coated with WO3 by dipping process using tetrabutyl titanate (C16H36O4Ti) as raw material. The catalysts were characterized by XRD, Raman spectra, TEM and diffuse reflectance UV-Vis spectra.

以钛酸丁酯为钛源，采用水解法制备金红石型TiO2粉体，用浸渍法将制备的TiO2粉体包覆不同浓度的WO3（记为WO3-TiO2），并采用X射线衍射、拉曼光谱、透射电镜和紫外－可见漫反射光谱等手段对所得的光催化剂进行了表征。

The rutile TiO2 powder photocatalyst was prepared by hydrolysis process, and it was coated with WO3 by dipping process using tetrabutyl titanate(C16H36O4Ti) as raw material. The catalysts were characterized by XRD, Raman spectra, TEM and diffuse reflectance UV-Vis spectra.

摘 要：以钛酸丁酯为钛源，采用水解法制备金红石型TiO2粉体，用浸渍法将制备的TiO2粉体包覆不同浓度的WO3(记为WO3-TiO2)，并采用X射线衍射、拉曼光谱、透射电镜和紫外可见漫反射光谱等手段对所得的光催化剂进行了表征。

Objective To investigate extended-spectrumβ-lactamasesand AmpCβ-lactamases and metalloβ-lactamasesproducing by gram-negative bacilli in burns.Mehtods Adopitng double-disk synergy test,modified three-dimensional extract test and the enzyme inhibitor of EDTA-Na2to detect ESBLs and AmpC and mBLA producing strains.Using K-B test to perform the susceptibility testing.Results Among348strains of gram negative bacilli,ESBLs,AmpCβ-lactamases,ESBLs combined with ApmCβ-lactamases and mBLA produc-ing strains were found in122,47,9and20strains,the incidence being35.1%,13.5%,2.6%and5.7%respec-tively.

目的 了解烧伤感染主要革兰阴性杆菌产超广谱β-内酰胺酶、AmpC酶和金属β-内酰胺酶及其对常用抗生素耐药性情况，指导烧伤医院感染合理用药方法采用双纸片协同试验检测产ESBLs株，头孢西丁三维试验检测产AmpC酶株，头孢曲松三维试验检测同时产ESBLs和AmpC酶株，依地酸二钠协同试验检测产mBLA株，K-B法进行G -杆菌药敏试验。

After a muliobjective searching by AT-0520 D electronic computer using orthogonal regression design, the optimum technological conditions including the principal factors which influence the chemical reactions have been found. The expected yield of butyl acrylate, the content of byproduct β ester and acid value are all identical with the experimental data.

对影响反应的主要因素，采用正交回归设计和用AT-0520D电子计算机对多目标进行搜索，得出优化工艺条件组合，经实验验证，丁酯收率、付产β酯含量、酸值的予测值都和实验值吻合，并经生产规模验证，得到满意结果。

In the pharmaceutical aisles, I found 61 varieties of untan oil and sunblock , and 80 different pain relievers —aspirin, acetaminophen, ibuprofen; 350 milligrams or 500 milligrams; caplets, capsules, and tablets; coated or uncoated.

在药品的过道上，我发现有61种不同的untan 油和防晒霜，还有80种止痛药——阿司匹林，乙醯胺基酚，异丁苯丙酸，还分350毫克和500毫克；还有囊片，胶囊，药片，其中还分有有包裹层和没有包裹层的。

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。