乙酸乙酯

The synthesis of terpinyl acetate with terpineol and acetic anhydride as reactants and cerium sulfate as catalyst was studied.

研究了以Ce(SO4)2.4H2O为催化剂，松油醇和乙酸酐为原料合成乙酸松油酯。

In this study, we carried out the allylation of anilines with allylic acetates in PEG-H2O system in the presence of palladium as catalyst. N-allylation of anilines was achieved.

在本研究中，我们完成利用钯催化剂，在水及聚乙二醇系统中，使苯胺类和乙酸烯丙酯类进行烯丙基化反应，并探讨各苯胺类反应物之结果。

In the precence of the base catalyst KF/Al2O3, the one - pot reaction of 2 -hydroxybenzaldehyde or 2 - hydroxynaphthaldehyde with ethyl α- bromoacetate,α-bromoacetophenone , 1,4 - dichloromethylbenzene , 4,4'- dichloromethylbiphenyl and 1,5 -dichloromethylnaphthalene gave the benzofuran compounds in 38-89% yield.

本文报道用 KF/Al_2O_3作为碱催化剂，由水杨醛或2-羟基-1-萘醛分别和α-溴代乙酸酯、α-溴代苯乙酮、苄基氯、4，4'-二氯甲基联苯和1，5-二氯甲基萘等进行一锅化缩合反应，以38～89％的产率合成了14种芳并呋喃化合物。

Then esterification of 3, 7-dimethyl-2-pentadecanol with acetic anhydride, the active component of sex pheromone of pine sawfly, 3, 7-dimethyl2-pentadecanyl acetate was obtained in 83. 4％ yield.

最后，用乙酸酐对3，7-二甲基-2-十五碳醇进行酯化，得到松叶蜂性信息素的活性组分--3，7-二甲基-2-十五碳醇乙酸酯，收率为83.4％。

Methods: In alkaline condition, reaction between amino acids and phenylisothiocyanate formed a derivant of phenylisothiocyanate-amino acid. For RP-HPLC, the Diamonsil C18 column 250 mm×4.6 mm,5 μm） and binary gradient elution were used. The mobile phase A was 0.1 mol/L sodium acetate solution-acetonitrile (93∶7） and the mobile phase B was acetonitrile-water（80∶20）. The detecting wavelength was 254 nm.

在碱性条件下，氨基酸与异硫氰酸苯酯反应，生成异硫氰酸苯–氨基酸的衍生物，采用 Diamonsil C18色谱柱（250 mm×4.6 mm，5 μm），用二元梯度洗脱方式，流动相A为0.1 mol/L乙酸钠–乙腈（93∶7），流动相B为乙腈–水（80∶20），检测波长254 nm。

Methods: A model to evaluate lymphocyte proliferation stimulated with a polyclonal activator, concanavalin A, was established by vital dye carboxyl fluorescin diacetate succinmidyl ester labeling technique. Effects of the different doses of anisomycin on the lymphocyte proliferation were estimated by flow cytometry and MTT methods. The propidium iodide labeling technique was applied to assay the effect of the different doses of anisomycin on changes of the lymphocyte cell-cycle stimulated by ConA or by phorbol ester plus Ionomycin. The percentage of the expression level of CD69 and CD25 on the activated lymphocytes was evaluated by fluorescin-conjugated monoclonal antibody double labeling technique.

以活体染料羧基荧光素乙酰乙酸琥珀酰亚胺酯染色，建立在多克隆刺激剂刀豆蛋白A刺激下评价小鼠淋巴细胞增殖的模型，通过流式细胞术和MTT法分析茴香霉素在不同剂量下对淋巴细胞增殖的作用；采用碘化丙锭染色分析茴香霉素对ConA或佛波醇酯加离子霉素刺激的小鼠淋巴细胞周期变化的作用；利用荧光标记的单克隆抗体双染技术和流式细胞术观察茴香霉素对小鼠CD3~+T细胞早期及中期活化标志分子CD69和CD25表达的影响。

The poly grafted starch copolymer was synthesized by the reaction of glycolide and starch in dimethyl sulfoxide with triethylamine as catalyst.

摘要以乙交酯和淀粉为原料，三乙胺为催化剂，在二甲基亚砜介质中合成了聚羟基乙酸接枝淀粉共聚物。

Ingredients:marine salt,oiea europaea oil,caprylic/capric triglyceride,prunus amygdalus dulcis oil,simmondsia chinensis oil,persea gratissima oil,peg-40 hydro genated gastor oil,silica,dimethicone,tocopheryl acetate,lavandula angustifolia oil,perfume.

主要成分：海盐，橄榄油，辛酸/葵酸三甘油酯，杏仁油，霍霍巴油，鳄梨油，聚乙二醇-40氢化蓖麻油，硅石，聚二甲基硅氧烷，生育酚乙酸酯，薰衣草精油，香精。

Ingredients: Sucrose,Oiea Europaea Oil,Caprylic/Capric Triglyceride,Prunus Amygdalus Dulcis Oil,Simmondsia Chinensis Oil,Persea Gratissima Oil,Peg-40 Hydro Genated Gastor Oil,Silica,Dimethicone,Tocopheryl Acetate,Lavandula Angustifolia Oil,Perfume.

成分：蔗糖，橄榄油，辛酸/葵酸三甘油酯，杏仁油，霍霍巴油，鳄梨油，聚乙二醇-40氢化蓖麻油，硅石，聚二甲基硅氧烷，生育酚乙酸酯，薰衣草精油，香精。

Cefixime open side chain acid was prepared by oximation,etherification,chlorination,ester decomposition using t-butyl acetoacetate as starting material.

以乙酰乙酸叔丁酯为原料，经过肟化、醚化、氯代酯解反应合成了头孢克肟开环侧链酸。

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。