正丁酸

Ethyl 4-[(1-hydroxy-1-methyl)ethyl]-2-propyl-1H-imidazole-5-carboxylate,the key intermediate of Olmesartan ,was synthesized from butanoic acid and o-phenylenediamine via condensation under microwave-irradiation,oxidation,esterification and the Gringard reaction.

用正丁酸与邻苯二胺为原料，在微波照射下缩合成2-丙基苯并咪唑，再氧化开环制得2-丙基咪唑二羧酸，再经酯化、Gringard反应制得抗高血压药物奥美沙坦的关键中间体2-丙基-4-[(1-羟基-1-甲基)乙基]-1H-咪唑-5-羧酸乙酯，总收率32.2%。

Preparation of butyric acid by oxidation of butyraldehyde was studied.

在反应温度 50～ 60℃，氧醛摩尔比 0 。75～ 0 。875，催化剂与正丁醛的质量比 0 。1 %～ 0 。2 %，反应时间为 3 h左右的优化的工艺条件下进行了正丁醛氧化制正丁酸的研究。

Using mathematical methods studied wet oxidation catalyst butyric acid degradation reaction is in the process of TOC changes.

采用数学方法研究了催化湿法氧化降解正丁酸反应过程中的TOC变化。

Results When Raji and B95-8 cells were cultured with 20-80 μg/ml of "Dongxia wan", the expression of EBV early antigen and EBV capsid antigen induced by croton oil and n-butyric acid and the natural expression of EBV-VCA were all inhibited significantly. The inhibition rates were 19.3%-49.84%, 34.63%-45.61% and 21.67%-47.78% respectively.

结果 20～80 μg/ml中药复方"冬夏丸"与靶细胞共培养能显著的抑制巴豆油和正丁酸联合诱发Raji细胞的EBV早期抗原和B95-8细胞的EBV壳抗原表达及B95-8细胞的EBV-VCA自然表达，抑制率分别是19.31%～49.84%，34.63%～45.61%和21.67%～47.78%。

The morphology, component and structure of electrolytically etched surface are characterized and the mechanism of electrolytic etching and graining is also discussed based on the theoretical analysis. The components that can form barrier layer or dissolve the resisting layer on the surface of Al-Mg-Si alloy specimens are investigated through voltamperometric and chronoamperometric analysis in several solutions.

通过对Al-Mg-Si合金在各种溶液中的电流密度—电位曲线及电位—时间曲线的测量与分析，筛选出能够在Al-Mg-Si合金表面形成阻挡层的成分和对阻挡层有刻蚀作用的成分，并进行复配实验对比，优选出偏硼酸钠-硼酸、酒石酸-碳酸钠、磷酸钠-正丁酸和柠檬酸钠-柠檬酸等4种图纹电解刻蚀液体系。

The fenchyl hypochlorite is used for fair bleach, and the perborate is used for detergent. Other ester, such as the fenchyl benzoate is a kind of perfume fixative, the fenchyl butyrate is dressing agent, and the fenchyl isobutyrate has slightly fruity, sweet herbal and vetiver base odor.

葑醇的次氯酸酯可作为女性的美白剂，硼酸酯是优良的清洁剂，其它的酯类如苯甲酸酯有定香作用，正丁酸酯在松木型香精中可用作修饰剂，异丁酸酯则稍有果香、甜的药香和似香根的底香。

At different time-points after LPS challenge in the presence or absence of SB, the rat tissue sample and alveolar macrophages were collected.

方法脂多糖注射复制大鼠急性肺损伤模型，在LPS致伤后不同时相点（有或无正丁酸钠SB干预时）获取肺组织及肺泡巨噬细胞。

Our main products category has chloride (pivaloyl chloride, acetyl chloride, Propionyl chloride, methyl acryloyl chloride, butyl chloride, 2 - furyl chloride already chloride, acryloyl chloride, is amyl chloride, etc.) and acids (positive acid, pivalate, propionate, acetic acid, methyl acrylate, 2 - furoic acid, etc.) and so on dozens of products.

我公司主要生产的产品有酰氯类（特戊酰氯、乙酰氯、丙酰氯、甲基丙烯酰氯、正丁酰氯、2-呋喃甲酰氯、己酰氯、丙烯酰氯、正戊酰氯等）和酸类（正丁酸、特戊酸、丙酸、乙酸、甲基丙烯酸、2-呋喃甲酸等）等几十种产品。

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。

In chapter I, We study that the catalysis of Al~(3+) on the reduction of Cr~(6+) by citrate acid, tartaric acid, oxalate acid, butyric acid, laetrile acid and malic acid at different temperatures and pH.

本论文共分三部分：第一部分：在不同的温度和pH条件下，通过批式试验研究了Al~(3+)对柠檬酸、酒石酸、草酸、正丁酸、苦杏仁酸、苹果酸还原Cr~(6+)的催化作用。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。