查询词典 butyrate

Macroporous tributyl amine aminating strongly basic anion exchange resin-a phase transfer catalyst with high catalytic activity for nucleophilic substitution,which was screened out via combinatorial chemistry method –was used to catalyze the nucleophilic substitution reactions for synthesis of benzyl acetate,benzyl propionate,benzyl butyrate and benzyl valerate.

用组合化学方法筛选出的对无外加碱条件下的亲核取代催化活性最高的聚合物季铵盐–三丁胺胺化强碱性阴离子交换树脂为相转移催化剂，催化合成了乙酸苄酯、丙酸苄酯、丁酸苄酯、戊酸苄酯等羧酸苄酯。

The results show that: The contents of H_2 and CO_2 are 10%～20%, 75%～90% and no CH_4 respectively. Ethanol, acetate, propionate and butyrate are detected, and the trace of valerianate is not found in the liquid of fermentation.

在本实验的发酵条件和所取淤泥发酵产氢时，pH值为5.5时的发酵产氢要优于pH为4.5时的发酵产氢能力；55℃的发酵温度要优于35℃的发酵温度；1：1的底物接种物比例发酵要优于3：7的底物接种物比例发酵。

Chromatography peaks were obtained by GC-MS and 56 compounds were identified. The main components were linalyl butyrate (30.212%),(1α, 3α, 4β, 6α)-4,7,7-trimethyl-bicycloheptan-3-ol (10.940%),-4-carene (1.826%), 4-methylene-1-(1-methylethyl)-bicyclo [3.1.0] hexane (1.109%),β-myrcene (1.170%), limonene (5.784%), 3, 7-dimethyl-1, 6-octadien-3-ol (5.742%), n-hexadecanoic acid (0.914%) and-9, 12-octadecadienoic acid (2.952%), etc.

用GC-MS分离出69个峰，鉴定出56种物质，主要成分为：芳樟丁酸酯(30.212%)、(1α， 3α， 4β， 6α)-4，7，7-三甲基－双环[4.1.0]庚烷－3-醇(10.940%)、-4-蒈烯(1.826%)、4-亚甲基－1-（1-甲基乙基）－双环[3.1.0]环己烷(1.109%)、β-月桂烯(1.170%)、柠檬烯(5.784%)、3，7-二甲基－1，6-辛二烯－3-醇(5.742%)、n-棕榈酸(0.914%)、-9，12-十八碳烯酸(2.952%)等。

Cellulose acetate butyrate with high or low degree of butyryl substitution was synthesized in heterogeneous system(butyric acid/ acetic acid/ butyric anhydride/ sulfuric acid) using the "free solvent" method. The effect of activation time, esterification time, the molecular weight of cellulose and the content of the organic acid or anhydride on the degree of acetyl and butyryl substitution of cellulose was discussed.

在非均相体系中进行酯化反应，采用&反应性溶剂&，以硫酸作为催化剂合成出从高丁酯含量到低丁酯含量的纤维素醋酸丁酸酯，研究有机酸以及酸酐的添加量、活化时间、酯化反应时间以及原料纤维素的分子量对酯化产物纤维素醋酸丁酸酯的影响。

Desonide ; Hydrocortisone butyrate ; Mometasone furoate ; Dermopathic treatment

地奈德；丁酸氢化可的松；糠酸莫米松；皮肤病治疗

A new method employing furoic acid and the n-butanol to synthesize the furoic acid-n-butyrate flavor has been reported in this paper.

以糠酸和正丁醇为原料，改性钼镍粉作催化剂取代以往常用的硫酸作催化剂，合成糠酸正丁酯香料。

Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.

以硫酸氢钾为催化剂，正丁酸和异戊醇为原料合成了正丁酸异戊酯。

Thirdly, on the basis of the optimal reaction conditions of synthesis of borneolacetate, using borneol 、 isoborneol, acetic acid, propionate、 butyrate and isobutyric acid as the starting material and nanometer solid superacid (S_2O_8)~(2-)/ZrO_2 or (SO_4)~(2-)/ZrO_2-La_2O_3 as the catalyst ,a series of compounds ( borneol ester and isoborneol ester ) which had six new compounds were prepared.

以合成乙酸冰片酯的最佳反应条件为基准，采用纳米固体超强酸S_2O_8~(2-)/ZrO_2或SO_4~(2-)/ZrO_2-La_2O_3为催化剂，以冰片、异冰片、乙酸、丙酸、丁酸、异丁酸为原料，合成了系列正、异冰片酯(其中6个末见文献报道)。

Isobutyl butyrate was synthesized from butyric acid and isobutyl alcohol using tungstosilicic acid as catalyst.

以钨硅酸为催化剂，通过桂酸和戊醇酯化反应合成桂酸戊酯，研究了各有关因素对产品酯化率的影响。

With mixed diet as a substrate, supplying sodium fumarate increased neutral detergent fiber digestion, CMCase activity, and propionate proportion, but decreased acetate, butyrate, and isovalerate proportions, and acetate to propionate ratio.

当使用混合日粮（60%百慕达乾草+40%精料）为受质时，补充延胡索酸钠，提高了中洗纤维消失率、羧甲基纤维素分解酵素活性和丙酸的百分比，降低了乙酸、丁酸和异戊酸的百分比和乙酸对丙酸的比例。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。