乙酸

Isobutyl acetate was synthesized from isobutyl alcohol and acetic acid with silicotungstic heteropolyacid as catalyst.

字数：6943 页数：24）摘要：以硅钨杂多酸为催化剂，以异丁醇和乙酸为原料合成了乙酸异丁酯。

When using mixed diet as the substrate, sodium fumarate addition increased NDF digestibility, xylanase activity, total VFA concentration and propionate proportion, decreased acetate, isobutyrate, and isovalerate proportions, and acetate to propionate ratio.

当使用混合日粮为受质时，添加延胡索酸钠，提高了中洗纤维消失率、木聚糖酵素活性、总挥发性脂肪酸浓度和丙酸的百分比，降低了乙酸、异丁酸与异戊酸的百分比和乙酸对丙酸的比例。

Several routes for synthesizing methyl isopropyl ketone were introduced, including the main methods based on isobutyl aldehyde-acetic acid, isobutyric acid -acetic acid, methyl ethyl ketone-formaldehyde and isoprene.

介绍了甲基异丙酮的多种合成路线，主要有异丁醛-乙酸法、异丁酸-乙酸法、甲基乙基酮-甲醛法和异戊二烯法。

In order to supply basic thermodynamic data for the separation design of acetyl acetone from the isomerization reaction of isopropenyl acetate,vapor-liquid equilibrium data of isopropenyl acetate-acetyl acetone system under 101.3 kPa was measured using Ellis equilibrium still.

为了给乙酸异丙烯酯异构化生产乙酰丙酮工艺的产物分离设计提供基础热力学数据，用埃利斯平衡蒸馏器测定了101.3 kPa下乙酸异丙烯酯-乙酰丙酮体系的汽液平衡数据，结果表明，该二元体系未形成共沸物，实验数据通过了Herrington面积法的热力学一致性检验。

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。

Then, the whole herb of Juncus effusus was extracted with 95% ethanol. The ethanolic extract was further separated with petroether, chloroform, ethyl acetate and methanol in turn to give four fractions.

用95%乙醇提取制备了总提取物，然后将总提物用石油醚、氯仿、乙酸乙酯、甲醇依次萃取，分成极性大小不同的部位，通过药理活性筛选后确定了有效部位为乙酸乙酯部分。

Then the index of ulcer was measured and the ulcer inhibitory rate was measured.Results: The weight of ear of mice treated with XSG was reduced compared with that of normal group,and the joint swelling of rat was less than that of normal group. The latence of sole-ache caused by hot-plate and bellyache caused by acetic were both delayed and the times of skewing body within 15 minute were reduced compared with that of the normal group.

结果：香砂六君颗粒对小鼠二甲苯性耳廓肿有明显对抗作用；对大鼠蛋清性关节肿有一定对抗作用；对热板和醋酸所致小鼠疼痛香砂六君颗粒能明显延长其舔足潜伏期和减少扭体次数；对大鼠利血平型及乙酸型胃溃疡香砂六君颗粒组的溃疡指数从模型组的46.26±1.64mm2和23.02±2.05mm2减少为34.75±0.82mm2和13.84±1.2mm2；对大鼠利血平型及乙酸型胃溃疡香砂六君颗粒的溃疡抑制率分别为51.43%和39.87%。

The fourteen complexes of mandelic acid with rare earth elements in aqueous solution have been prepared.

在水溶液体系中，用苯羟乙酸直接与碳酸稀土作用，合成了十四种苯羟乙酸稀土配合物。

Metaldehyde, a solid tetramer of acetaldehyde with low toxicity, has been widely available in commercial molluscicide preparations.

聚乙酸是种低毒性的乙酸之四聚或六聚化合物，目前在台湾被广泛地使用於诱杀蜗牛上。

An coupling apparatus with a chlorination reactor and a melt crystallizer was built,which was used in chlorination of acetic acid and separation of monochloroacetic acidby crystalliza- tion at the same time.

用氯化反应与熔融结晶耦合装置，进行乙酸氯化与产物氯乙酸的结晶分离，避免了 MCA 的深度氯化，从而提高了 MCA 的收率。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。