酯化了的

On the basis of analyzing data about stearic acid triethanolamine ester quaternary's preparation process and methods of analysis and identification, this article summarized synthetic conditions for this quaternary ammonium salt, this synthetic condition composed by synthesis of esters and quaternary ammoniation.

在对有关硬脂酸三乙醇胺酯季铵盐的制备工艺、分析鉴定方法的资料分析的基础上，综述了由硬脂酸制备该季铵盐的工艺条件，该工艺条件由酯胺的合成和季铵化2步构成。

We successfully improved the methods of departing O-methyl using boron tribromide, of isolating hydrogen bromide byα-chloro-ethyl chloroformate, and of related in synthesis of natrexone, new medicine, using boron tribromide. This resulted in generation of hydrogen cyanide becoming impossible.

改进了以氯甲酸-α-氯乙酯脱代替溴化氰以及改进的三溴化硼法作为新药纳曲酮合成中相应的方法，去除了合成过程中产生氰化氢气体的可能性。

In general, the phosphoamino acid esters were unable to transfer their phosphoryl group to other hydroxyl nucleophiles even with the presence of imidazole, but the N-phosphoserine and threonine esters were two exceptions.

二、测定了部分磷酰化D—氨基酸的磷酰基转移反应速率常数，并对外消旋化合物的酯交换反应进行了旋光度跟踪，发现磷酰化丝、苏氨酸的对映体有明显的区别。

Methomyl, fipronil, tebufenozide and imidacloprid resulted in slow photodecomposition of rotenone in aqueous solution revealing a photo-extinction effect, chlorpyrifos, ethiofencarb, cypermethrin and tetramethrin made the photolysis of rotenone in aqueous solution fast showing an obvious photosensitized effect.

室内条件下研究了鱼藤酮水溶液存在不同杀虫剂时，鱼藤酮的紫外光降解，结果表明：灭多威、氟虫腈、虫酰肼和吡虫啉使鱼藤酮在水溶液中的光解速率下降，表现出明显的光猝灭降解效应；毒死蜱、杀虫单、氯氰菊酯和胺菊酯使鱼藤酮在水溶液中的光解速率加快，表现出光敏化降解效应。

A hard butter rich in 1,3—distearyl-2-lonoleyl-glycerolhas been prepared by lipase-catalysed transesterification of safflower oil with stearic acid.

用高亚油酸型的红花籽油和硬脂酸，经1，3位专一性固定化脂肪酶Lipozyme的催化，通过有方向性的酯交换，制备出了以1，3——二硬脂酰—2—亚油酰甘油酯为主要组分的硬脂。

METHODS: Based on the antitumor activity and structural feature of 8-chloroadenosine and retinoic acid, modifications were made at positions 5′ and 8,substituted cinnamoyl and benzoyl groups were bound at 8 position through amido and ester bonds, sulfonation and nitrosation at 5′-OH and its direct chlorination were conducted.

对腺苷的8位和8-Cl-腺苷的糖环羟基进行了结构改造，以酰胺键和酯键在腺苷的8位连接了具共轭基团的肉桂酰基和苯甲酰基，得到腺苷的维甲类似物；对8-Cl-腺苷的5′-羟基进行了甲磺酰化，硝基化以及氯代反应，得到了它的衍生物。

Hrough copolymerization of styrene with few quantity of methacrylic acid, maleic anhydrate or 4-vinyl pyridine respectively and of butyl methacrylate with maleic anhydrate, the functional groups carboxyl, simple anhydride and pyridyl have been introduced respectively to the chain of PS or PBma.

通过苯乙烯与少量的甲基丙烯酸、马来酸酐或4—乙烯基吡啶的共聚及甲基丙烯酸正丁酯与马来酸酐的共聚，可在聚苯乙烯及聚甲基丙烯酸丁酯链上分别引入功能基因羧基、酸酐基和吡啶基对共聚物进行了红外光谱、酸碱滴定、元素分析、玻璃化转变温度、粘度及紫外光谱的测定。

Described in chapter 3 is the immediate application of the Clemmensen reductive rearrangement reaction to the polycyclic system as illustrated in a elaboration of the 5-6-7 tricyclie core skeleton of Stemona alkaloids in 5 steps: N-alkylation, [3, 2] -sigmatropic rearrangement, Dieckmann condensation, oxidative cyclization, reductive rearrangement, starting from ethyl pipecolinate hydrochloride.

我们以哌啶酸乙酯为起始原料，经氮烷基化，[3，2]-σ重排，Dieckmann缩合，自由基环化，6-6-6元环系到5-6-7元环系的还原重排五步反应，高收率地构筑了百部生物碱的5-6-7氮杂三环骨架，并用X射线晶体衍射法确定了其结构。

A series of ABEPS were synthesized from long chain fatty acids, benzene, polyglycol and 1, 3-propane sultone by the procedure of Friedel-Crafts acylation, Huang-Minlon reduction, Williamson and sulfonation reaction, and these compounds had never been reported in the past time.

以长链羧酸、苯、多缩乙二醇和丙烷磺内酯为初始原料，依次经Friedel-Crafts酰基化反应、Huang-Minlon还原、Blank反应、Williamson成醚以及磺化反应等过程，合成了系列未见报道的ABEPS。

Starting from the hydroxylamine (dimethyl amino ethanol, triethanolamine) and 1, 3-propane sultone, a series of hydroxyl and sulfonyl dual-functionalized zwitterionic salts were synthesized. Then dual-functionalized ionic liquids containing both hydroxyl and sulfonyl functional groups were produced successfully by zwitterionic salts and three kinds of strong acids (p-toluene sulfonic acid, trifluoromethanesulfonic acid, methanesulfonic acid) respectively. The structure of zwitterionic salts and dual-functional ionic liquids were confirmed by the 1H NMR and IR.

以羟基有机胺(N，N-二甲基乙醇胺，三乙醇胺)为原料与1，3-磺酸内酯反应合成了一系列含有羟基和磺酸基双官能团的内盐，并将所得到的内盐分别与三种强酸(对甲苯磺酸，三氟磺酸，甲磺酸)反应，成功地合成了双功能化室温离子液体，并通过红外光谱、核磁氢谱测定，证实了内盐和双功能化离子液体的结构。

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。