酯

The effects of reaction temperature, reaction time, catalyst dosage, addition of esterification agent and the ratio of monoglyceride to glycerol were examined.

分别考察了反应温度、反应时间、催化剂添加量、酯化剂添加量和单甘酯与甘油的比例对酸值的影响。

Effects of non-ionic small molecular emulsifier, lecithin, monoglyceride and sucrose ester on the microencapsulation of chicken oil were studied.

研究了非离子型小分子乳化剂卵磷脂、单甘酯和蔗糖酯对以大豆蛋白为主要壁材包埋鸡油脂效果的影响。

Papers is about emulsificaters for chocolate milk by Distilled Monoglyceride and sugar ester with different HLB.

以分子蒸馏单甘酯和不同HLB值的蔗糖酯为原料复配巧克力牛奶乳化剂，在比较其乳化效果差异的基础上，同时就各个乳化剂的成本进行比较，从而优选出乳化效果好、成本低廉、耗能较少的乳化剂投入实际应用。

The results showed that three kinds of emulsifiers can lower the surface tension of the soy bean protein solution, improve the emulsifying ability. Lecithin and monoglyceride had little effect on the emulsion stability, but sucrose ester can improve the emulsion stability. In the presence of the three kinds of emulsifier the microencapsulation efficiencies were low.

结果表明3种乳化剂均能降低大豆分离蛋白溶液的表面张力，但是卵磷脂、单甘酯对大豆分离蛋白乳状液的稳定性影响不大，而蔗糖酯可以提高大豆分离蛋白乳状液的稳定性，但是三者的存在均使产品的表面油含量增大，微胶囊效率降低。

The effects of reaction time and the amount of the catalyst on the ester yield were investigated with sodium bisulfate monohydrate green catalyst.

苯甲酸乙酯制备是典型的有机实验，本文采用自行设计的回流－吸水反应装置，一水硫酸氢钠为绿色催化剂，考察了反应时间、催化剂用量对酯化反应产率的影响。

The title complex has been synthesized by the reaction of silicotungstic acid , 1,10-phenanthroline monohydrate and cupric acetate.

以钨硅酸为催化剂，通过丁酸和异丁醇反应合成了丁酸异丁酯，探讨醇酸物质的量比、催化剂用量及反应时间对酯化率的影响。

Objective To detect the resistance of Musca domestica in various habitats in early phase with the method of acetylcholinesterase. Methods The traditional assay method and acetylcholinesterase were used to detect the resistance of M.

目的 应用一种家蝇抗药性早期检测方法即乙酰胆碱酯酶法，了解南昌市不同生境家蝇对常用的有机磷和氨基甲酸酯类杀虫剂的抗性现状及其发展趋势。

As investigated, the shape of the fruit was mainly rotundity, and the color of the fruit were red, black, yellow, mauve. Variation coefficient of mineral elements, which revealed wider variation range and rich genetic diversity. Among them, Fe, the content and the variation coefficient of which was the highest(2.12 mg·100g-1 and 26.99％), it has large potential for futher selection. Ripe fruit of 12 wild myrobalan plum seedlings were analyzed using head space-solid phase microextraction and gas chromatography-mass spectrometry. The results showed considerable genetic variations in these aspects: The total content of volatile components, the classes and contents of each compounds classes, the segregation ratio, and content of main components. There were 83 compounds in total belonging to 6 classes detected in 12 wild myrobalan plum seedlings, including esters, alcohols, ketones, aldehydes, heterocycle and Hydrocarbons. Among them, Formic acid, hexyl ester, the content of which was the highest(4.33 μg·g-1),was important character impact odors.

结果表明，①新疆野生樱桃李实生株系的果实形状主要为圆形，少数为椭圆形、卵圆形、卵形和宽卵形，果实颜色有黄色、红色、紫红色和黑色等4种类型，野生樱桃李果实纵径、横径、单果重、果形指数以及可溶性固形物含量均存在一定程度的变异，遗传多样性较为丰富，其中以单果重的变异系数最大(9.13 %)；②新疆野生樱桃李实生株系果肉组织的Zn、Ca、Mg、Mn、Fe及Cu等6种矿质元素含量变异丰富，其中以Fe元素的含量（平均值为2.12 mg·100g-1）和变异系数（26.99％）最高，进一步筛选高铁性状单株的潜力很大；③从新疆野生樱桃李12个实生株系中共鉴定出醇类、醛类、酯类、酮类、烃类及杂环类等6类83种挥发性化合物，各实生株系挥发性化合物总含量、挥发性化合物种类及其含量以及主要挥发性化合物分离比率与含量等存在广泛的遗传变异，遗传多样性较为丰富，其中以甲酸己酯含量最高（平均值为4.33 μg·g-1），是野生樱桃李果实香气形成的重要特征性化合物。

Experimental materials: American NPG alloy,β-tricalcium phosphate, calcium phosphate cement, poly-lactic-co-glycolic acid and polytetrafluoroethylene.

实验材料：美国NPG黄合金块、β-磷酸三钙、固化的磷酸钙骨水泥、聚丙交酯乙交酯及聚四氟乙烯。

The analysis of the components and contents of volatile material indicated that fruit of apples treated with 2 and 4ml/kg of ethanol increased the content and kinds of the characteristic volatile and improved flavor and quality in apple, while the fruit treated with 6ml/kg of ethanol produced higher contents of volatile material and developed off-flavor. Fruit of'Yar'pear treated with 2 and 4ml/kg of ethanol increased the sweet taste and aroma, but higher ethanol concentration showed off-flavor.

对苹果挥发性物质成分的分析表明，2及4ml/kg的乙醇处理增加了苹果特征风味挥发性物质的组分及含量，使水果呈现果香和花香，改善了苹果的品质，而6ml/kg的乙醇处理也能增加苹果果香，但由于强烈果香味的乙酸乙酯等组分在所增加的挥发性物质中所占比例较大，果实呈现浓烈的果香，并使果实的在口中的余味较差，在感官评价中稍差。2和4ml/kg的乙醇处理增加鸭梨甜味，并具有清爽的果香味，而高剂量的乙醇处理余味较差。4ml/kg乙醇处理，在挥发性物质组分数量上与对照差异不大，但却使乙醇形成酯类增加，使鸭梨果实呈现浓郁的果香。

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。