丁酸

Activity of GAD was assayed by measuring the formation of GABA.

根据L-谷氨酸脱羧酶能够分解谷氨酸产生γ-氨基丁酸和CO2的特性，通过测定产物γ-氨基丁酸推断酶活。

Cis-3-hexen-1-ol, butyl acetate, ethyl butyrate, hexanal, trans-2-Hexen-1-al, propyl propionate that consists of green leaf volatiles and cymene were the most attractive compounds.

顺-3-己烯醇、乙酸丁酯、丁酸乙酯、丙酸丙酯及伞花烃等对光肩星天牛具有较强的正趋性反应。

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。

Therefore it is very necessary and of great importance in environmental protection and economy to study the industrially production method of 3-hydroxybutyric acid.

生物降解塑料的开发是解决"白色污染"的有效途径，3-羟基丁酸是制备生物降解塑料的重要原料之一，且目前尚无规模化的工业生产，故研究3-羟基丁酸的工业化合成方法具有重要的环境意义和经济意义。

The dairy cow sub-clinical ketosis diagnosis test paper of the present invention is used conveniently and has the advantages of economic practicality, high sensitivity and specificity, and good stability.

本发明使用方便、经济实用、敏感性和特异性高、稳定性好的奶牛亚临床酮病诊断试纸，试纸用于对奶牛乳汁中D--3-羟丁酸和D--3-羟丁酸盐的检测。

GABA or gamma-aminobutyric acid, discovered in 1950, is the most important and widespread inhibitory neurotransmitter in the brain.

丁酸或伽马-氨基丁酸，发现于1950年，是最重要和最广泛的抑制性神经递质在脑。

The result was shown as follows:compared with the good quality beer,the diacetyl,aldehyde,islobutyl alcohol,isoamyl alcohol and total acid were higher,however,propyl alcohol and ethyl butyrate were lower

研究中还发现污染细菌后的发酵过程中的pH下降迅速，降糖加快，最终得到的啤酒中双乙酰、乙醛、异戊醇、异丁醇和总酸偏高，而正丙醇、丁酸乙酯含量偏低。

Blends of P(3-hydroxylbutyrate-co-4-hydroxylbutyrate) [P(3HB-co-4HB)] plasticized by triethyl citrate, soybean oil and glycerin triacetate have been prepared by a solvent casting film method. The effects of varying the type and content of plasticizer on the properties of the polymer blends have been studied.

采用溶剂成膜法制备了柠檬酸三乙酯、大豆油和甘油三乙酸酯增塑的聚（3-羟基丁酸酯－co-4-羟基丁酸酯）共混物，考察了增塑剂的种类及其用量对共混物热学和力学性能的影响。

However, the unique exception isthat PHB is able to be aerobically degraded to carbon dioxide and water by a numberof different soil-bacteria and fungi. As a result, PHB has gained much attention in theplastic industry. 3-Hydroxybutyrac acid and ethyl 3-hydroxybutyrate are the mainmonomers for producing PHB, an important biodegradable plastic.

这主要原因是PHB不但具有与通用塑料类似的物理性质，而且它还可被土壤中的细菌和真菌降解为二氧化碳和水。3-羟基丁酸和3-羟基丁酸乙酯是合成PHB的主要单体，目前尚未工业化生产。

A salt or ester of butyric acid .

与丁酸相关或产生丁酸。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。