查询词典 tri-ester

Meanwhile cyclodextrin can simulate ester hydrolase,which also may have an impact on itself.Up to now,there is no research focused on the stability of cyclodextrin ester.

同时环糊精本身就可以模拟酯解酶，也有可能对自身酯键产生影响，目前还没有专门真对环糊精酯键稳定性的相关研究。

At the same time, the enthalpy change of 212 kJ/mol for Tempo trapping methyl radical, namely O-〓 bond dissociation energy has been also obtained. This value is close to that of nitrous acid ester and far less than that of nitric acid ester. It is probably due to the relatively strong electron withdrawing capability of nitryl group.

同时我们还测得了甲基自由基与Tempo的反应的焓变，即O—〓键离解能为212 kJ／mol，它接近于亚硝酸甲酯中C—O键的离解能，而小于硝酸甲酯中的键离解能，这可能和硝酸根的吸电子能力较大有关。

During the manufacturing of the critical intermediate cephalosporin nucleus --7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt, first the feasibility of the one-pot synthetic route of open loop, closed loop and ozonization when chlorine is passed over is qualified by experiments. Then the critical factors that will influence this reaction are studied as follows: the mol ratio of triphenyl phosphite and Diphenylmethyl 3-hydroxy-7-phenylacetaminoceph-3-em-4-carboxylate-l-oxide is four to one; the quantity of the stablizer should be at least more than two to one. The temperature of the system must be 25℃ when chlorine is passed over so that the hydrochloride can be precipitated to obtain cephalosporin nucleus of cefaclor--7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt.

在制备关键中间体头孢母核7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐时，先通过实验验证把开环、闭环、臭氧化三步在通入氯气时并为一锅煮的合成路线的可行性之外，又研究了影响该反应的几个重要因素：亚磷酸三苯酯与3-羟基-7-头孢烷-5-亚砜-2-甲酸二苯甲酯的摩尔比为4：1；稳定剂2-甲基-2-丁烯的用量至少大于2：1，通入氯化氢气体时体系温度在25℃时盐酸盐则能够顺利析出，获得头孢克洛的头孢母核—7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐。

Major procurement of goods: a three-chlorosilanes, dichloromethane, AE activity ester, 3-iodine Silane, special acid, pentyl chloride, triethylamine, thiadiazole, tetrazolylazo acid, 2 - Acetamide, tetrahydrofuran, the four-guanidine, isopropanol, five phosphorus trichloride, sodium vary bitter, acid, sodium phenylacetate, 6-2 silicon n-amine, Ethylacetoacetate , Methyl isobutyl ketone, potassium dihydrogen phosphate, aluminium oxide, DL methionine, N, N-dimethylaniline, NN-diethyl aniline, 4 sodium EDTA, Anhydrous sodium sulfate, ammonium sulfate, potassium sulfate, sodium acetate, sodium carbonate, DMC, formic acid, sodium chloride medicinal, oxalate, protopine, acetone, alcohol, acetic acid, vinegar Ethyl, butyl acetate, methanol, ethanol (anhydrous, industrial, medicinal), formaldehyde, Ye Jian (30%), hydrochloride (industrial-grade, refined grade, reagent level), sulfate (98%), Ammonia, calcium carbonate, chlorine dioxide, 6 - APA ,7-ACA ,7-ADCA ,7-ANCA, sulbactam, ceftazidime activity ester, Deng salt (hydroxymethyl-K, acid precursors Potassium, sodium dihydrogen methyl), resin, the enzyme, water treatment agent, Xiao Mo agent, demulsifier, flocculants, activated carbon, all kinds of medicinal materials, All kinds of additives

三甲基一氯硅烷、二氯甲烷、AE活性酯、三甲基碘硅烷、特戊酸、特戊酰氯、三乙胺、噻二唑、四氮唑乙酸、二甲基乙酰胺、四氢呋喃、四甲基胍、异丙醇、五氯化磷、异辛酸钠、苯乙酸、苯乙酸钠、六甲基二硅胺烷、乙酰乙酸乙酯、甲基异丁酮、磷酸二氢钾、三氧化二铝、DL蛋氨酸、N，N-二甲基苯胺、NN-二乙基苯胺、乙二胺四乙酸四钠、无水硫酸钠、硫酸铵、硫酸钾、醋酸钠、碳酸钠、碳酸二甲酯、甲酸、药用氯化钠、草酸、片碱、丙酮、正丁醇、冰醋酸、醋酸乙酯、醋酸丁酯、甲醇、乙醇、甲醛、液碱（30％）、盐酸（工业级、精制级、试剂级）、硫酸（98％）、氨水、碳酸钙、二氧化氯、6－APA、7－ACA、7－ADCA 、7－ANCA、舒巴坦、头孢他啶活性酯、邓盐(羟甲基钾、前体酸钾、二氢甲基钠)、树脂、生物酶、水处理剂、消沫剂、破乳剂、絮凝剂、活性碳、各种药用辅料、各种添加剂

Nine new compounds were characterized, and they were: opuntioside Ⅰ(11), 4-ethoxyl-6-hydroxymethyl-α-pyrone (14),--ester (22), 1-butoxyl--malate (24), ethyl α-L-rhamnopyranoside (26), opuntioside Ⅱ(34), kaempferol 7-O-β-D-glucopyranosyl (1→4)-β-D-glucopyranoside (46), methyl α-D-glucopyranoside-6-(methyl 4-malate)-ester (47), and opuntioside Ⅲ(48). Opuntioside Ⅰ,Ⅱ,Ⅲ and 4-ethoxyl-6-hydroxymethyl-α-pyrone belong to the skelecton of α-pyrone.

新化合物分别是：仙人掌苷Ⅰ（11），4-乙氧基-6-羟甲基-α-吡喃酮（14），琥珀酸乙酯--酯（22），L--苹果酸-1-丁酯（24），乙基α-L-吡喃鼠李糖苷（26），仙人掌苷Ⅱ（34），山奈酚7-O-β-D-吡喃葡萄糖基（1→4）-β-D-吡喃葡萄糖苷（46），α-D-吡喃葡萄糖甲苷-6-（苹果酸-4-甲酯）-酯（47），仙人掌苷Ⅲ（48），其中仙人掌苷Ⅰ、Ⅱ、Ⅲ及4-乙氧基-6-羟甲基-α-吡喃酮均为α-吡喃酮骨架类型的新化合物。

The methods of synthesis and racemization of Naproxen ester were studied and the most suitable methods for synthesis and racemization of Naproxen ester were determined.

第二章主要研究了在萘普生拆分过程中涉及到的有机合成，对萘普生酯的合成和消旋方法做了系统的研究，从中确立了最适宜的合成和消旋方法。

The influence of the addition of element S of vulcanization reaction,the ester-exchange agent/rape seed oil of ester-exchange reaction and the R-OH/ P_2O_5 of phosphate re...

试验考察了硫化反应的硫化剂添加量、酯交换反应的交换剂与油的摩尔比以及磷酸酯化反应的R—OH与P2O5的摩尔比对产物结构和性能的影响。

So the corn oil methyl ester biodiesel used in this study that is made from transesterification reaction. After diesel engine experiment, experimental results demonstrated that using corn oil methyl ester biodiesel, which is based on no influence of engine performance has higher BSFC and the concentration of than premium diesel about 11.99% and 11.06%, respectively. Moreover, its emission concentration of Smoke and HC are lower than premium diesel about 52.47% and 16.51%, respectively.

故本研究使用甲酯化反应的玉米油甲酯生质柴油，经内燃机实验后所得结果得知，使用玉米油甲酯生质柴油为燃料时，在不影响引擎性能的情形下，其燃料消耗率及NOX排放浓度比石化高级柴油分别高约11.99％和11.06％，而Smoke和HC的排放浓度分别低约52.47％和16.51％。

RESULTS β-sitosterol(1),2,6-dihydroxyhumlan-9-3(12),7(13),9-triene(2),quercetin-7-methyl ester(3),protocatecheuic acid(4),shikimic acid(5),shikimic acid methyl ester(6) and daucosterol(7) were isolated from Ill...

结果从厚皮香八角果皮中分离得到了7个化合物，分别是β-谷甾醇(1)2、，6-dihydroxyhumulan-9-3(12)，7(13)，9-triene(2)、槲皮素-7-甲基醚(3)、原儿茶酸(4)、莽草酸(5)、莽草酸甲酯(6)和胡萝卜苷(7)。

The invention also relates to the use of the said aliphatic ester of an ester and of the said oil having a molar mass ranging from 650 to 10000 g/mol, in a physiologically acceptable composition, as agent for conferring on the said composition properties of slipperiness, of nonstickiness, of gloss and/or of comfort.

本发明还涉及所述酯的脂族酯和所述的摩尔质量为650至10000g/mol的油在生理适用的组合物中的用途，它们用作令所述组合物具有光滑性、不粘腻、亮泽和/或舒适特性的成分。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。