戊酸

In comparison with the organic solvents as reaction medium, higher conversion was achieved the tert-ethyl valerate could be formed in the ionic liquid medium.

当反应体系中存在水时，有特戊酸生成。表明反应中2，2，4-三甲基戊烷首先发生β-断裂反应，生成叔丁基正碳离子和异丁烯。

The Rhizopus delemar lipase catalyzed synthesis of isoamyl valerate in organic solvents was studied, and the optimum condition for the esterification was acquired.

德氏根霉菌经固态发酵生产脂肪酶，以此酶为催化剂，在非水介质中合成了正戊酸异戊酯。

As for VFAs, acetic acid, butyric acid and valeric acid were totally metabolized, the residual VFAs were mainly propanoic acid.

其中，挥发酸中乙酸、丁酸和戊酸几乎100%被代谢掉，残余的挥发酸主要是丙酸。

Alcaligenes eutrophus WSH3 was selected as the strain for the production of polyβ-hydroxybutyrate and copolymer of 3-hydroxybutyrate and 3hydroxyvalerate . This study is aimed at finding an operative way leading to high PHB and PHBV productivity, high yield coefficient and high content of PHB and PHBV. The main research results are as follows

本文以真养产碱杆菌(A.eutrophus)WSH3为聚-β-羟基丁酸和3-羟基丁酸与3-羟基戊酸的共聚物的生产菌株，以实现PHB和PHBV发酵过程的高的生产强度、高的产物对基质的产率系数和高的聚合物含量为目标，进行了PHB及PHBV发酵条件的研究，主要研究内容和结果如下

Among them, 3 strains isolated from yellow water could convert lactic acid into ethanol and most strains isolated from Daqu could convert lactic acid into flavoring compositions such as ethanol, isobutyric acid, caproic acid or isovaleric acid etc.

其中，从黄水和大曲中分离到多种降乳菌，黄水中的3株菌可将乳酸转化为乙醇，大曲中的多数降乳菌可转化乳酸为异丁酸、己酸、异戊酸、乙醇等风味成分。

The progresses in the synthesis study of isoamyl isovalerate at home and abroad were reviewed.

综述了国内外对异戊酸异戊酯的合成研究的进展情况。

The effects of activation temperature and activation time for the catalyst and the esterification conditions on the yield of isoamyl isovalerate were investigated.

用纳米级HZSM-5分子筛作催化剂合成了异戊酸异戊酯，考察了催化剂的活化温度和活化时间以及酯化反应条件对酯收率的影响。

INTRODUCTION: Elevated concentrations of isovaleric,methylmalonic, and propionic acid are associated withimpaired consciousness in genetic diseases.

简介：在一些遗传性疾病中，异戊酸、甲基丙二酸及丙酸浓度的升高与意识损伤有关。

Azobis-4-cyanopentanoyl chloride was prepared by reaction of 4,4'-azobis-4-cyanopentanoic acid and phosphorus pentachloride.

采用4，4'-偶氮二（4-氰基戊酸）与五氯化磷反应制备了4，4'-偶氮二（4-氰基戊酰氯）。

Some of the individual acids that were released, such as pentanoic and benzoic acid, were present throughout all seven days that the experiment was conducted.

某些产生的酸类，比如戊酸和苯丙酸，在实验进行的七天内一直存在。

The X-ray diffract was used to analyze the crystal structure of the composite. Results show that after the talc was treated with blend coupling agent, the crystal structure of talc changed, and effect Intercalation phenomenon.

通过X射线衍射分析可知，用混合偶联剂对滑石粉进行预处理后，滑石粉晶体结构发生改变，产生了插层现象，使PP／滑石粉复合材料为纳米复合材料。

An authentic Maui wedding might require the services of a 'kahu', which is a Hawaiian minister.

毛伊可能需要一个真实婚礼服务'kahu'，这是夏威夷部长。