酯化了的

A mass of DMO in the transesterification course inhibited the disproportionation which has a small equilibrium constant. As a result, selectivity and yield of DPO were low.

酯交换反应中由于反应物DMO的大量存在阻碍了平衡常数较小的歧化反应的进行，使得DPO选择性和收率较低。

In this study,an influence of a solid "polymer matrix" with different Tg.on double bond conversion in acrylate based formulations were evaluated.

近期的研究评价了具有不同玻璃化温度的固态聚合物基体对丙烯酸酯结构中双键转换的影响。

If a specially appionted solvent is used in esterifying reaction, APG to solvent will be 1 to 0.6-0.7. And then, the final yield is more than 70％,and its properties indicate that it is a better anion surfactant. Such can pave the new way for the application of APG.

若酯化反应选一合适的溶剂，则APG：溶剂为1∶0.6-0.7时，阴离子活性物含量可达70％以上，测试其性能，表明为比较优良的阴离子表面活性剂，这样就为APG的应用开辟了新途径。

The reaction conditions including the molar ratio of methanol to oil, amount of alkaline catalyst used, and reaction temperature and time were optimized by the mono-factor and orthogonal tests.

通过棉籽现场碱催化转酯化联产生物柴油和无毒棉粕，考察了棉仁中水的质量分数、粒径对产物中脂肪酸甲酯的质量分数和棉粕中游离棉酚质量分数的影响；对反应过程中的醇油摩尔比、反应时间、催化剂用量、反应温度进行了单因素和正交实验考察。

Hydrophobically modified anion polyelectrolytes based on Fenugreek gumwere prepared by fixation of dodecyl or cetyl chains onto carboxymethyl Fenugreek gum backbone via ester functions.

将十二烷基与十六烷基以酯键方式分别引入经羧甲基化改性的香豆胶大分子骨架上，制备了基于香豆胶的疏水改性阴离子聚电解质衍生物。

Hydrophobically modified anion polyelectrolytes based on Fenugreek gumwere prepared by fixation of dodecylor cetylchains onto carboxymethyl Fenugreek gum backbone via ester functions.

将十二烷基与十六烷基以酯键方式分别引入经羧甲基化改性的香豆胶大分子骨架上，制备了基于香豆胶的疏水改性阴离子聚电解质衍生物。

The potassium polyvinylsulfate was synthesized by using different types of polyvinylalcohol, the ester value of the PVSK was determined by the method of BaCl2 titration.

摘 要：用不同牌号的聚乙烯醇制备聚乙烯醇硫酸钾，用BaCl2滴定法测定了它们的酯化度。

This is transformed into anomeric acetates 16, which is used for the synthesis of a number of 2＇, 3＇-dideoxy-2＇-trifluoromethylnuclosides via Vorbruggen glycosylation reaction. At the same time, L-2-tifluoromethyl-4-thiofuranosides 39 were also prepared from the key intermediate lactone.

从这一砌块出发，经由关键中间体2-三氟甲基-γ-丁内酯转化得到的化合物16的Vorbruggen糖苷化反应，合成了2＇，3＇-双脱氧-2＇-三氟甲基嘧啶核苷。

In this research, large volume stainless pots, high－quality pottery pots and enamel pots, instead of traditional small volume pottery pots, were used in storing several kinds of fresh liquor like "Shuanggou Liquor" etc.and the analysis of stored liquor by gas chromatography and atomic absorption spectrum indicated that the application of large volume stainless containers, instead of the traditional pottery pots, could not only advance liquor aging , produce flavour and remove precipitate, develop soft liquor style, stabilize and improve liquor quality,harmonize the balance of components , decrease liquor loss and liquor storage space,but also promote oxidation , reduction, esterification and molecular hydrogen bond association in the process of liquor storage.

对&双沟酒&等各香型酒，利用大容器的不锈钢罐、优质陶缸和搪瓷罐代替传统小容积陶坛或陶缸贮存新酒作了试验研究。采用气相色谱和原子吸收光谱对贮酒分析，得出采用不锈钢等大容器代替传统小陶罐贮存酒，不但可使酒在贮存过程中进行氧化、还原、酯化和分子氢键缔合作用，促进酒体老熟去杂增香，使酒体柔和老熟、成分平衡协调，稳定和提高酒质；而且还可以降低酒的损耗和减少贮酒库占地面积。孙悟

The structures of biosilica formed in aloe spicules are pillars of 2-3 μm diameter and lengths of up to 35 μm when Si〓 was supplied.

芦荟植物从特殊的有机前体分子正硅酸已酯合成了非自然状态下形成的生物矿化SiO〓结构。

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。