丁酸

Degradation of propionate is feasible while combined with the degradation of acetate and butyrate.

乙酸和丁酸的降解能有效的帮助降解丙酸。

Standard partial molar volumes of the alkyl chains of amino acids have been calculated by improved hard-sphere model in aqueous sodium acetate, sodium butyrate and sodium caproate solutions.

用改进的硬球混合物模型计算了氨基酸侧链在乙酸钠、丁酸钠、己酸钠水溶液中的标准偏摩尔体积。

The main esters in Chinese distilled liquor include,ethyl caproate,ethyl acetate,ethyl lactate and ethyl butyrate etc.

中国蒸馏酒中含有一定比例的乙酸乙酯、乳酸乙酯、己酸乙酯和丁酸乙酯等，这几种酯的含量在一定程度上形成了中国蒸馏酒与外国蒸馏酒很不相同的地方。

The experimental results show that the transfer volumes for these amino acids from water to sodium acetate, sodium butyrate, sodium caproate, sodium caprylate and guanidium hydrochloride solution are positive and increase with the increasing concentration of denaturant The standard partial molar transfer volume of zwitterionic end group (NH〓, CO0〓) are larger positive values and the corresponding values of methylene group CH〓 are smaller and negative.

实验结果表明，氨基酸从水到乙酸钠、丁酸钠、己酸钠、辛酸钠和盐酸胍水溶液的标准转移偏摩尔体积为正值，且随变性剂浓度的增加而增大；氨基酸的两性端基的标准转移偏摩尔体积为较大的正值，而CH〓基团标准转移偏摩尔体积为较小的负值。

Values of hydration number of amino acids have been calculated at different temperature and concentration of denaturant. It is found that they decrease with increasing temperature and concentration of denaturant. Denaturant and increasing temperature have cooperative dehydration effect on amino acids.

计算了不同温度和变性剂浓度下氨基酸在乙酸钠、丁酸钠、己酸钠、辛酸钠和盐酸胍水溶液中的理论水化数，发现它们随变性剂浓度的增加和温度的升高而减小，说明变性剂和升温对氨基酸有协同脱水作用。

Serum creatine kinase and isodynamic enzyme, lactate dehydrogenase and isodynamic enzymel (LDH1),α-hydroxybutyrate dehydrogenase in 3 group were detected with electrocardiography and clinical analysis was made.

分别检测各组血清肌酸激酶及其同工酶，乳酸脱氢酶及其同工酶1(LDH1)，α-羟丁酸脱氢酶水平，同时行心电图检查。

Aim To study the relationship between the structures of a series of 4,4-diaryl-3-butenyl derivatives of nipecotic acid and guvacine and their inhibition activity of the γ-aminobutyric aciduptake.

目的研究3-哌啶甲酸和四氢烟酸的4，4-二芳基-3-丁烯衍生物结构和对γ-氨基丁酸摄取抑制活性之间的关系。

By reacting isobutyraldehyde with diethyl oxalate using sodium methoxide as catalyst,3-methyl-2-oxobutanoic acid,sodium salt was prepared by one pot.

采用甲醇钠催化异丁醛与草酸二乙酯反应，一釜法合成了3-甲基-2-氧代丁酸钠。

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。

The famciclovir was synthesized from purine by a series of steps by Acylation, Decarboxylation, Reduction ,and so on; Derivatives of these intermediates is described from the 6-chloro- 9H- purin-2-amine as raw materials in different conditions when the iodine and bromide were synthesized with the addition of two intermediate 6-bromo-9H-purin-2-amine and 6-iodo-9H-purin-2-amine; There is elaborated from the main part of a acetophenone, urineaminohydrochloride, phenylhydrazine, ethyl acetoacetate as raw material through a series of reactions to synthetic 3-phenyl-4-formylphenyl pyrazole and 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-aldehyde two pyrazole aldehyde, and then with 2-amino-6-chlorine-9-(2-methicillin-oxo-co-methyl-4-yl) purine reaction of the two new pyrazole purine Schiff bases.

本论文主是采用以鸟嘌呤为原料，经过一系列的酰基化，脱羧，还原等反应作用下最终得到了产物2-氨基-9-(4-乙酰氧基-3-乙酰氧基甲基丁基)嘌呤；其中的中间体衍生物主要是阐述从以2-氨基-6-氯鸟嘌呤为原料通过在不同的条件下进行溴代与碘代分别合成了另外两种中间体2-氨基-6-溴鸟嘌呤及2-氨基-6-碘鸟嘌呤；还有一部分主要是阐述从以苯乙酮，盐酸氨基脲，苯肼，乙酰乙酸乙酯为原料通过一系列的反应先合成3-苯基-4-醛基吡唑及5-氯-3-甲基-1-苯基-1H-吡唑-4-甲醛这两个吡唑醛，然后再与2-氨基-6-氯-9-(2-甲氧羰基丁酸甲酯-4-基)嘌呤反应得到了两个新型的吡唑嘌呤席夫碱

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。