酸的

The proposed method is simple, rapid and accurate. It could be used to determine GA and EA in Sanguisorba oficinalis L. simultaneously.

本方法操作简便，结果准确可靠，适于地榆中没食子酸和鞣花酸的同时测定。

There exists the optimum technical parameters about the effects of hydrolysis conditions. When the concentration of H+is 2.6 2.8 mol/L, the concentration of TiOSO4 is 25 28 g/L, the time of hydrolyzation is 60 min and the temperature of hydrolyzation is 125℃respectively, the yield of TiOSO4reaches 95%, the particle size of H3TiO3 is less than 40 nm, and the powder of H3TiO3 is spheral.

研究结果表明：水解条件直接影响偏钛酸的粒径及其分布，其中，钛液酸度的影响最大；水解条件对TiOSO4水解率和偏钛酸粒径的影响存在着最佳结合点，即当c为2.6~2.8 mol/L，ρ(TiOSO4)(按TiO2计)为25~28 g/L，水解时间为60 min，水解温度为125℃时， TiOSO4的水解率可达95%以上，得到的偏钛酸呈球形且粒径为40 nm。

There exists the optimum technical parameters about the effects of hydrolysis conditions. When the concentration of H(superscript +) is 2.6~2.8 mol/L, the concentration of TiOSO4 is 25~28g/L, the time of hydrolyzation is 60 min and the temperature of hydrolyzation is 125℃ respectively, the yield of TiOSO4 reaches 95%, the particle size of H3TiO3 is less than 40nm, and the powder of H3TiO3 is spheral.

研究结果表明：水解条件直接影响偏钛酸的粒径及其分布，其中，钛液酸度的影响最大；水解条件对TiOSO4水解率和偏钛酸粒径的影响存在着最佳结合点，即当cH(上标+为2.6~2.8mo1/L，ρ(TiOSO4)（按TiO2计）为25~28g/L，水解时间为60min，水解温度为125℃时，TiOSO4的水解率可达95%以上，得到的偏钛酸呈球形且粒径为40nm。

The proposed method is of high practicability in on-line determination of sulfamic acid and DL-malic acid in electropolishing solution.

对实现抛光液中氨基磺酸和DL-苹果酸的在线监测具有实际意义。

Some physical and chemical targets of black sulfoacid were analysed. Application of bIack sulfoacid have been investigated.

本文对黑磺酸的部分理化指标进行了分析，在利用黑磺酸方面做了一些探索。

In the process of the sulphonate reaction, we use 1,2-dichloroethane as solvent and chlorosulfonic acid as the agent of sulfonation.

环化反应采用1，2-二氯乙烷作溶剂，用氯磺酸作磺化剂，在回流温度下进行磺化反应，3-十二烷基蒽醌磺酸的收率为85.75%。

The thermal decomposition of tyrosine was studied by the methods of DTA and TG. The molecular geometries of tyrosine, intermediates and the products were optimized by AM1 method. The thermolytic mechanism is put forward through the results of the experiment and the calculation.

用差热曲线、热重曲线法测得了酪氨酸的热解曲线，用AM1方法优化了酪氨酸及其中间产物和产物分子的构型，计算了有关分子的键长和键级，通过对其热解过程的分析及AM1研究的结果，首次提出了酪氨酸的热解机理。

become sour变酸: The thundery weather has turned the milk.

在雷雨欲来的天气牛奶变酸了。

By means of UV、IR and GC, we preliminarily analyzed the components, structures and content of the fatty acids in Trichosanthes kirilowii oil, and we also analyzed the structure of trichosanic acid .

并采用杂环化法衍生化瓜蒌仁油，应用气相色谱-质谱联用法对瓜蒌酸进行结构鉴定及含量测定，确定了瓜蒌酸的结构为C18：39c，11t，13c，采用峰面积归一化法计算出其相对质量分数为41.82%。

The removal efficiency of L-acid and TOC of solution is 57% and 53% respectively when 0.4 g doped photocatalyst is applied in 100 mg·L-1 L-acid solution illuminated by visible light for 4 hours, while it is 13% and 10% respectively in the case of the undoped photocatalyst.

Mo6+的掺杂不影响负载催化剂的紫外光活性及对L-酸的吸附能力。100 mg·L-1的L-酸溶液加0.4 g催化剂，在可见光下反应4 h，掺杂催化剂对L-酸和溶液总有机碳的去除率分别为57%和53%，而未掺杂的催化剂去除率分别为13%和10%。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷