一酸的

The method is simple, rapid, and accurate, and is suitable for the determination of melamine, ammeline, ammelide, and cyacuric acid in milk and milk powder.

该方法简便、快速、准确，可满足牛奶及奶粉中三聚氰胺、三聚氰酸、三聚氰酸一酰胺、三聚氰酸二酰胺测定的需要。

A HILIC-MS/MS method was developed to determine melamine and its three derivatives, cyanuric acid, ammelide and ammeline in milk and milk powder. The milk sample was directly extracted by acetonitrile with the help of ultrasonic, and milk powder was resolved in water before extraction by acetonitrile.

建立了牛奶和奶粉中三聚氰胺及其3种衍生物（三聚氰酸、三聚氰酸一酰胺、三聚氰酸二酰胺）的亲水色谱－串联质谱检测方法(HILIC-MS/MS)。

After centrifugation, the extracts were separated on HILIC column by using acetonitrile-water as mobile phase. The analytes were identified and quantitated by LC-tandem MS under the positive/negative electrospray ionization and multiple reaction monitormode. The calibration curves showed good linearity in the range of 25-5000 μg/kg for melamine and cyanuric acid, and 50-10000 μg/kg for ammeline and ammelide. The limits of detection and limits of quantification were in the range of 5-20 μg/kg and 50-100 μg/kg, respectively.

牛奶样品直接用乙腈超声波提取；奶粉样品先用水溶解后再加乙腈超声波提取，高速离心后以乙腈－水为流动相，采用亲水作用色谱柱分离这4种化合物，在电喷雾正、负电离切换多反应监测模式下进行定性与定量分析，三聚氰酸一酰胺与三聚氰酸二酰胺含量在50~10000μg/kg之间、三聚氰胺与三聚氰酸在25~5000μg/kg之间，均获得良好的线性。

This paper proposes a method for the determination of 4-hydroxy-3-nitro-benzenearsonic acid and arsanilic acid in the nitration reaction product of arsanilic acid by ion-pair chromatography.

本文提出一种用于测定对氨基苯胂酸硝化反应产物中4-羟基-3-硝基苯胂酸及对氨基苯胂酸含量的离子对色谱法，选择甲醇：水=25：75作为流动相，0。

A diacid triglyceride containing two molecules of palmitic acid and one of stearic acid could be named dipalmitostearin or steartodipalmtin.

含有二分子棕榈酸和一分子硬脂酸的二酸式甘油三酸脂可命名为二棕榈酰硬脂酰甘油酯或硬脂酰二棕榈酰甘油酯。

A diacid triglyceride containing two molecules of palmiticacid and one of stearic acid could be named dipalmitostearin orsteartodipalmtin.

含有二分子棕榈酸和一分子硬脂酸的二酸式甘油三酸脂可命名为二棕榈酰硬脂酰甘油酯或硬脂酰二棕榈酰甘油酯。

Ketoglutaric acid A five-carbon dicarboxylic acid that is an intermediate in the KREBS CYCLE.

酮戊二酸：一种五碳二羧酸，为三羧酸循环的中间产物。

For determination of pyruvic acid, we used the ferrocene as an electron transfer mediator and pyruvate oxidase as a catalyzer, and had a systemic research for the immobilization of ferrocene and enzyme on the gold electrode. At last, a pyruvic acid biosensor with good stability and activity of electrochemistry and biocatalysis was constructed. There are two aspects of contents in the paper. The first step, we had an in-depth research for the immobilization of ferrocene on the gold electrode, and fabricated a modified gold electrode by glutaric dialdehyde cross-linked egg white as the matrix of ferrocene immobilization.

本文以研制一种通过对酶催化反应引起的电化学响应进行检测，从而实现对丙酮酸浓度进行检测的方法为目的，选择了二茂铁为电子传递介体，丙酮酸氧化酶为酶催化剂，并对将上述物质固定到金电极表面从而制成一种新型的生物传感器的方法进行了系统而全面的研究，并制得了一种全新的具有良好电化学与生物催化活性和稳定性的丙酮酸生物传感器。

This catalyst was applied for the liquid phase oxidation of glyoxal to glyoxylic acid.

研究结果表明，V_2O_5/C催化剂对乙二醛的氧化具有良好的催化活性和乙醛酸选择性，反应过程中无需控制溶液pH值即可得到乙醛酸，乙醛酸在V_2O_5/C催化剂作用下不存在过度氧化，乙二醛的氧化产物主要是甲酸和乙醛酸，它们是一平行反应。

Allantoin was synthesized from glyoxylic and urea as raw materials using organic acid such as formic acid,oxalic acid and organic sulfonic,and one or two of organic acids such as hydrchloric acid,sulfuric acid and acetic acid catalyst.

以乙醛酸和尿素为原料，有机酸(如甲酸、乙二酸、有机磺酸等)、无机酸(如盐酸、硫酸、磷酸、醋酸等中的一种或两种)作催化剂合成了尿囊素产品。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。