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Using butyraldehyde and 1,2-propanediol as raw materials, H3PW6Mo6O 40 /TiO2 as catalyst, butyraldehyde 1,2-propanediol acetal is synthesized.

以二氧化钛负载磷钨钼杂多酸为催化剂，通过丁醛和1，2-丙二醇反应合成了丁醛1，2-丙二醇缩醛。

Through research, we find that the non-uniform dispersion of butyraldehyde in PVA solution is the main reason of PVB agglomeration. Adding butyraldehyde to the PVA solution at the temperature of 40-60℃can ensure the uniform dispersion of butaraldehyde in PVA solution.

通过改变工艺条件，在40-60℃的条件下，将正丁醛加入PVA溶液中，可保证正丁醛分散均匀，降至适当温度后，再滴加盐酸，这样在不加任何乳化剂的条件下也得到了粉末状的PVB产品。

This basic research is armed to find out and to predict SCF particularity, which are very important for the SCF application. Firstly the densities of the binary mixtures of CO2—methanol, CO2—ethanol, CO2—n— butyraldehyde and CO2—i—butyraldehyde were measured from 313.5K to 323.5K under the pressure range from 7 to 14MPa.

本文首先在313.5～323.5K、7～14MPa范围内测定了CO2及CO2—甲醇、CO2—乙醇、CO2—正丁醛、CO2—异丁醛二元混合流体的表观密度，讨论了压力、第2组分的种类和加入量对CO2表观密度的影响，在此基础上计算了溶质的偏摩尔体积，讨论了温度、压力和第2组分的性质对溶质偏摩尔体积的影响规律。

In this study, the constant volume visual method is used to measure the critical point properties of CO 2+toluene, CO 2+cyclohexane, CO 2+ n butyraldehyde, CO 2+ i butyraldehyde, CO 2+methanol and CO 2+ethanol binary systems.

采用固定体积可视观察法测定了 CO2 +甲苯、CO2 +环己烷、CO2 +正丁醛、CO2 +异丁醛、CO2 +甲醇及 CO2 +乙醇二元体系的临界点性质，为超临界萃取和化学反应提供基础数据。

Objective This study was designed to analyze the change of gene expression and investigate the mechanism of apoptosis induced by sodium butyrate.

目的分析丁酸钠诱导Raji细胞的基因表达变化，探讨丁酸钠诱导凋亡作用机制。

The physical and chemistry character of sodium butyrate, its function in gastrointestinal and application in animal production were mainly stated in this article.

本文综述了丁酸钠的理化性质、营养生理功能和其在动物生产中的应用，并简要展望了丁酸钠研究和应用的前景。

We used ion-exchange method to remove butyric acid from fermentation broth.

采用离子交换法吸附发酵液中的丁酸，从18种树脂中筛选出了1种对丁酸吸交性能较好的树脂A。

A resin derived from methacrylic acid.A salt or ester of butyric acid.

一种苦味油质的丁酸甘油三酸酯，丁酸甘油酯的一种形式。

A salt or ester of butyric acid .a bitter oily triglyceride of butyric acid; a form of butyrin.

一种苦味油质的丁酸甘油三酸酯，丁酸甘油酯的一种形式。

A bitter oily triglyceride of butyric acid; a form of butyrin.

一种苦味油质的丁酸甘油三酸酯，丁酸甘油酯的一种形式。

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。