酯

Resin transfer molding mould was manufactured with bisphenol-A epoxide vinylester resin as matrix,poly as low shrinkage additive and glass fiber tricot as reinforcing material,according to the basic requirement of matrix resin of RTM mould.

根据树脂传递模塑模具对基体树脂的基本要求，选用双酚A环氧乙烯基酯树脂为基体，聚乙酸乙烯酯为低收缩添加剂，玻璃纤维经编织物为增强材料，并加入相应的助剂，制备了复合材料RTM模具。

Second, using DBU as the base for enolization of propargylic esters of unsaturated acids 18e-k, we developed a tandem Ireland-Claisen rearrangement /isomerization reactions. It has been shown that the reaction sequence affords triene molecules 42a-b and 43a-b in moderated to high yields. Interestingly, with allyl hexa-3,5-dienoates 18i-j as the substrate, the rearranged products underwent further aromatization to give uniquely substituted benzyl acids 44a-b.

其次，以含有活泼质子的烯酸炔丙酯18e-k为底物，在DBU为烯醇化碱、TMSCl为硅试剂的条件下，底物18e-h发生了Ireland-Claisen重排/异构化串联反应，得到完全共轭的三烯类化合物42a-b及43a-b；而以己二烯酸炔丙基酯18i-j为底物时，重排/异构化后的产物进一步发生电环化等反应最终得到芳构化产物——取代苯甲酸类化合物44a-b。

Objective:to explore the effect of different plasma triglyceride on the platelet aggregation.

目的：通过观察不同血浆甘油三酯水平患者的血小板聚集率，分析血浆甘油三酯对血小板聚集功能的影响。

The IR spectra of polyisocyanate curing agent with different content of TDI trimer was measured and analyzed.

对不同TDI三聚体含量的多异氰酸酯固化剂的红外光谱进行了测定，采用偏最小二乘法对所得到的红外光谱进行分析，测定了多异氰酸酯固化剂中TDI三聚体的含量，该方法简单快速，结果可靠。

Triphenyl phosphite provided prominent stabilization only when used in combination with other stabilizers. Good results have been obtained for both polyether-urethane and nitrate esters when using 2,6-di-t-butyl-4-methyl-phenol as stabilizer.

亚磷酸三苯酯单独使用时效果较差，但与其它种类的稳定剂混合使用能得到较好的效果。2，6-二叔丁基-4-甲基酚对硝酸酯和聚氨酯粘结剂均具有良好的稳定作用。

The results showed that in PC/ABS alloy (mass ratio of 70/30) system, triphenyl phosphate and bisphenol A diphosphate mass ratio was 3:2 with a synergistic role of flame-retardant.

结果表明：在PC/ABS合金（质量比为70/30）体系中，磷酸三苯酯和四苯基［双酚－A］二磷酸酯按质量比为3：2复配具有协同阻燃作用。

Reverse-phase chromatography was employed for chiral separation of tropine acid enantiomers on the cellulose tribenzoate chiral stationary phases coated on a small-particle spherical silica support in an eluant system consisting of a mixture of alcohol and water.

摘 要：以乙醇-水流动相，用纤维素-三作为手性固定相对外消旋体托品酸进行了高效液相色谱手性分离考察了不同比例的乙醇-水流动相、不同流速以及用不同醇类酯化对托品酸酯在手性色谱柱上的色谱行为。

Second, aminolysis of polystyrene and poly prepared by reversible addition-fragmentation chain transfer polymerization was investigated. The product of the former contains predominantly double molecular weight species by the formation of disulfide bond, whereas the latter formed coupled species which consequently cleaved to unimolecular weight species.

由RAFT聚合的机理可知，聚合最终得到的聚合物的结构包含双硫酯基团，它是聚合物链保持活性特征的重要体现，同时它为聚合物的端基官能化提供了一个重要的途径，其中氨解反应是一个被人们广泛采用的方法，它在很温和的条件下将端基去掉，同时还能将双硫酯端基变成硫醇端基。

The dissipation rate constants of malathion and methyl parathion with a concentration of 3mg/L and ethion, dicofol and cyhalothrin with a concentration of 0.5mg/L in 2000ml of 55-60g canna planted water sulution were respectively increased by 77. 66％, 117. 44％, 64. 80％, 38. 11％ and 15. 35％ compared to those in unplanted water solutions.

与不种植植物的对照相比，50-60g美人蕉对2000ml分别含有3mg/L的马拉硫磷、甲基对硫磷及0.5mg/L乙硫磷、三氯杀螨醇和三氟氯氰菊酯培养液中的马拉硫磷、甲基对硫磷、乙硫磷、三氯杀螨醇和三氟氯氰菊酯的消解速率依次分别提高了77.66％、117.44％、64.80％、38.11％和15.35％。

Adenosine was used as the raw material, dissolved in triethyl phosphate and then esterified with thiophosphoryl chloride under 0~5℃ for 8h without water and oxgen, in alkaline condition provided by 2,6-dimethylpyridine, introducing thiophosphoryl ester to adenosine.Then superfluous triethylamine was added and reacted under 5℃ for 1h to synthesize rough 5'-AMPS.The unpurified product was appled to a DEAE Sephadex A-25 column and eluted with triethylammonium bicarbonate.

用腺苷为起始原料，溶解于磷酸三乙脂中后，在无水无氧环境中及2，6-二甲基吡啶提供的碱性条件下与三氯硫磷以0~5℃下发生酯化反应8h，将硫代磷酸酯引入腺苷，然后再与过量三乙胺在5℃下反应1h，合成粗产品，再用碳酸氢三乙胺作洗脱液，过DEAE Sephadex A-25凝胶柱纯化。

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。