乙酯

A new compound has been isolated from the Laurencia majuscule Lucas, it"s structure was determined by IR, MS,"HNMR, 13CNMR, clemently analysis.The compound is P -d-Arabinoside, 1-O-hexadecyl.

从采自西沙群岛的略大凹顶藻乙醇提取液的乙酸乙酯部分分离出了一个化合物，经IR、MS、~1HNMR、~(13)CNMR、元素分析等方法鉴定为一个新化合物：β-十六烷基-D-阿拉伯糖甙。

The varying tendencies of partition coefficients of some compounds in aqueous or nonaqueous solvent systems by calculating the phase equilibria with universal quasichemical functional group activity coefficient model are predicted. These compounds included saturated and unsaturated fatty acids ethyl esters,N2,4dinitrophenylamino alcohols, pnitrophenyl glucosides and so on, with simple structures and much differences in polarity.

以饱和及不饱和脂肪酸乙酯、2，4二硝基苯胺基脂肪醇和对硝基苯基葡萄糖甙等结构较为简单、极性差别较大的溶质系列为研究对象，应用修正的通用基团活度系数模型，通过相平衡计算，预测了它们在含水或不含水的溶剂体系中分配系数的变化趋势，并与前人的工作进行了对比。

Ethyl lactate is one kind of comestible synthetic spicery. It is also one kind of good solvent.

摘 要 乳酸乙酯是一种食用合成香料，它还是一种非常好的溶剂。

The effects of feed concentration and temperature on the separation performance were investigated.

在现有生产工艺中，经常会遇到低质量分数的乙酸乙酯和水的分离问题[1]。

Optimization of polyester condensation process and reactor design;2. The Structure Characters of the Sulfonated Condensation Polymer Series High Performance;3. The pH value of the solution was adjusted,and the co- condensation reaction was taken place between the hydroxy groups forming transparent organic-inorganic hybrid films on polycarbonate.

以甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)水解聚合产物作为主要成膜物质，引入正硅酸乙酯水解产物硅溶胶作为无机增强物，调节两种混合溶液pH值，利用两者羟基之间的共缩聚反应在聚碳酸酯板表面制备有机/无机复合透明耐磨薄膜；采用TG/DTA、FT-IR、SEM及UV-V IS对成膜过程、薄膜性能与结构进行表征。

Acetone extract of E.hirta may be toxic to spores of C.musaram. Ethyl acetate extrate of E.hirta may have inhibiting effects on conidium germination and mycelium growth of C.musaram.

大飞扬的丙酮提取物对芭蕉炭疽菌孢子可能具有毒害作用，乙酸乙酯提取物使芭蕉炭疽菌和链格孢菌的孢子芽管生长不正常。

Acetone extractive of Euphorbia hirta may be have viricidal effect on spores of C. higginsianum. Ethyl acetate extractive of E. hirta may be have inhibited effects on conidium germination or growth of hypha of C. higginsianum.

大飞扬草的丙酮提取物对炭疽菌孢子可能具有毒害作用，乙酸乙酯提取物使炭疽菌和链格孢菌孢子芽管生长不正常，且对其菌丝生长具有抑制作用。

Coverer: Seamless sheath of ether-based urethane resistant to cathodic, hydraulic and other environmental conditions.

包层：无缝铠装乙醚基氨基甲酸乙酯。耐阴极、液压和其它环境条件。

ObjectiveTo explore the methods of prevention and cure of sun-induced aging dermis, and clarify the mechanism of Ginsenoside Rb1 on sun-induced aging dermis, with the study of expression of matrix metallo preteinases in sun-induced aging dermis fibroblasts' cytoplast, which are cultured in vitro, under the effect of Ginsenoside Rb1 and arotinoid ethyl ester.

目的通过人参皂苷Rb1与芳维甲酸乙酯对皮肤真皮体外培养光老化成纤维细胞胞质内基质金属蛋白酶表达的影响，阐明人参皂苷Rb1对光老化的防治机理，探索光老化的防治手段。

Part I is devoted to the desensitizing mechanism of a widely-used dentine desensitizer that is the aqueous solution of 35% 2-hydroxyethylmethacrylate plus 5% glutaraldehyde. HEMA, GA and the mixture of HEMA + GA were used to interact with dentin, collagen, hydroxyapatite and bovine serum albumin individually.

Gluma由35％的甲基丙烯酸羟乙酯与5％的戊二醛的水溶液组成，是一种常用的牙本质脱敏药物，但关于其脱敏的机理一直有争论。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。