丁酸

In addition, the Medical Scientific Committee on the British Government scientists have found that in recent decades to reduce male sperm count and testicular volume of octyl phenol with narrow, double-Fen A and D n-methyl-phthalic acid resin, and these substances are widely used in manufacture of baby bottles, canned food boxes, food packaging bags, such as coating the inner wall.

此外，英国政府医学科学委员会的科学家们发现，近几十年来男性精子数量减少和睾丸体积缩小与辛基苯酚、双芬A和丁基苯甲基酞酸脂有关，这些物质广泛用于制造奶瓶、罐头盒、食品包装袋等的内壁涂层。

In this paper,the monomers including St and BA with strong waterproof property were employed to modify the traditional PVAc emulsion,and meanwhile draw into DAAM functional monomer in the copolymer system,will prepare out cross linking copolymer emulsion for ADH to improve the waterproof,oilproof and dry/wet mechanical property of fuel oil filter paper.

采用具有较强抗水性的苯乙烯、丙烯酸丁酯等单体对传统聚醋酸乙烯酯乳液进行共聚改性，并在共聚体系中引入双丙酮丙烯酰胺功能单体，制备出可通过外加己二酸二酰肼交联的外交联醋丙共聚乳液，以期提高燃油滤纸的耐水、耐油性和干湿态的力学性能。

Cefixime open side chain acid was prepared by oximation,etherification,chlorination,ester decomposition using t-butyl acetoacetate as starting material.

以乙酰乙酸叔丁酯为原料，经过肟化、醚化、氯代酯解反应合成了头孢克肟开环侧链酸。

Nanocrystalline Pb(Zr0.52Ti0.48)O3 was prepared from lead acetate, zirconium oxynitrate and tetrabutyltitanate by a sol-gel method.

以醋酸铅，硝酸氧锆，钛酸四丁酯为原料用溶胶－凝胶法制备了纳米Pb(Zr0.52Ti0.48)O3。

HE EXTRACTION OF NITRIC ACID WITH DIBUTYL HYDROGEN PHOSPHONATE

膦酸氢二丁酯对硝酸的萃取

The effects of the sol viscosity,mass ratio of buty1 titanate to active carbon, TiO 2 content of the sol and heat-treatment temperature on the photoactivity of TiO 2/AC composites were studied.

研究了TiO 2溶胶黏度、钛酸丁酯与活性炭的质量比、溶胶中TiO 2的量及热处理温度对TiO 2/ AC 复合体光催化活性的影响。

Factors influencing TiO_2-PILC photocatalystic properties were discussed, including the ratio of CH3COOH and Ti, the temperature and aging time of pillaring agents, pH value of reaction solution, the temperature of calcined, etc.

以钛酸四丁酯为前驱物，冰醋酸为鳌合剂，重点考察了[CH3COOH]/比、柱化剂制备温度和陈化时间、催化剂煅烧温度等对TiO_2柱撑蒙脱土结构的影响。

Ti-PILCs were also obtained with pillaring agent prepared from Ti(n-C4H9O)4 and HC1 by Sol-Gel, using purified Na-montmorillonite in Hubei as the starting clay.

以鄂东钙基膨润土经提纯钠化后所得的精制钠基蒙脱石d_(001=1.28nm为基质粘土，以钛酸正丁酯[Ti(n-C_4H_9O)_4]为钛源，采用溶胶—凝胶法制备了一系列钛交联蒙脱石纳米复合材料；并对Ti／土比、H／Ti摩尔比和盐酸浓度等主要合成条件进行了讨论。

We screened a set of Lewis base organocatalysts derived from chiral pipecolinic acid and tert-butanesulfinamide for the reduction of-N-Cbz-1- phenylpropenamine, including newly designed ones and some of those previously developed in our lab. However, only moderate stereoselectivities, albeit high yields were obtained.

在本课题组前期研究的基础上，我们筛选并设计了一系列以手性哌啶酸和叔丁基亚磺酰胺为母体的有机小分子路易斯碱催化剂，它们能催化三氯氢硅对-N-苄氧羰基-1-苯基丙烯胺的不对称还原，获得很高的收率和中等的对映选择性，并且具有很好的底物普适性。

In this paper,pleny lolanine and n-butyl acetate perform compound organic substrated chemical oscillating reactions .

本文报导了L—苯丙氨酸—乙酸丁酯为复合有机底物的化学振荡反应。

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。