Chemical reactions in urea-sulfuric acid system with different ratio of urea and sulfuric acid at various temperatures are studied .

研究了硫酸 尿素系统在不同配比和不同温度的化学反应。

Controlling Ammonia Volatilization by Mixing Urea with Humic Acid Fulvic Acid Triple Superphosphate and Muriate of Potash

尿素中添加腐植酸、黄腐酸、重过磷酸钙和氯化钾能抑制氨的挥发

A 1 % quota tariff rate will be charged on urea compound fertilizer and diammonium hydrogen phosphate .

对 尿素、复合肥、磷酸氢二铵三种化肥的配额税率执行1%的税率。

Calculate the percentage by mass of nitrogen in urea and ammonium sulphate .

试计算氮在 尿素及硫酸氨的质量百分率。

An amino acid important in the formation of urea .

一种对 尿素形成有重要作用的氨基酸。

An amine or amino resin is the alkylated reaction product of urea or melamine and formaldehyde .

含胺基或氨基树脂是 尿素或三聚氰胺和甲醛烷基化反应产品。

Common agents for the treatment of senile xerosis are moisturizing ointments or ointments containing steroids and urea .

二甘醇（助溶剂和吸湿剂）治疗老年性干燥症的常用制剂有：保湿软膏、素软膏和 尿素软膏。

Meanwhile urine calcium and hydroxyproline concentrations were examined as well . an amino acid important in the formation of urea .

同时测定尿中的钙和羟脯氨酸的含量。一种对 尿素形成有重要作用的氨基酸。

Amino and urea compounds are commonly used in applications demanding high levels of hygiene .

在对卫生要求较高的环境中，氨基和 尿素化合物一直得到广泛使用。

Author has introduced the structure principle and the main function for the smart valve positioner of the urea plant ;

介绍了 尿素装置智能型阀门定位器的结构原理和主要功能；

Ammonia from protein digestion the primary excretory product is converted to urea to be excreted in urine .

蛋白质消化所致的氨（主要的排泄物）被转化为 尿素（ urea）而从尿（urine）中排出。

To understand the influence of icterus on urease coupling method for determining the serum urea nitrogen ( BUN ) .

了解黄疸对尿素酶偶联法测定血清 尿素氮（BUN）的影响。

Canada is rich in natural resources for ammonia urea methanol and ethylene production .

加拿大有丰富的天然气资源，用于合成氨、 尿素、甲醇和乙烯的生产。

Refining of70 % Conjugated linoleic acid ( CLA ) was purificated with the method of urea including .

采用 尿素包合法对纯度在70%的共轭亚油酸（CLA）进行了提纯研究。

Melamine-urea-formaldehyde-chlorocyclophosphazene microcapsule flame retardant was made by in-situ polymerization process using melamine urea and formaldehyde as raw materials .

以三聚氰胺、 尿素和甲醛为原料，采用原位聚合法，制备了囊心为环状氯化磷腈、囊壁为三聚氰胺- 尿素-甲醛树脂的微胶囊阻燃剂。

Urea and ammonium nitrate solutions are most commonly used for N fertigation .

尿素和硝酸铵溶液是最常用的灌溉施肥氮肥品种。

Latest information of urea market in USA India and Viet Nam is provided for reference .

通过对美国、印度和越南的 尿素市场的简介，提供了进一步的最新市场参考信息。

The synthesis of6-methyluracil from ethyl acetoacetate and urea with PEG-400 as phase transfer catalyst was studied .

研究了聚乙二醇-400为相转移催化剂，乙酰乙酸乙酯和 尿素合成6-甲基脲嘧啶的工艺条件。

Study on Relation between Nitric Oxide Synthesis and Hepatic Urea Cycle on Condition of Aerobic Exercise ;

有氧运动条件下一氧化氮合成与肝脏 尿素 循环之间关系初探本文研究在 相 转移催化条件下 萜烯 低聚物与过 醋酸的环氧化反应。

Synthesis of allantoin from glyoxylic acid and urea using ion exchange resins as catalyst was investigated .

对三种阳离子交换树脂在乙醛酸与 尿素缩合反应中的催化活性进行了研究。

The separation and purification of oleic acid from Camellia-oleifera Abel Oil by Solvent-separation and Urea adduction fractionation was studied .

本文以油茶籽油为出发物料，对油酸溶剂法分离及 尿素包合法纯化工艺进行了研究。

Ammonium tristyrylphenol polyoxyethylene ether sulfate was synthesized from tristyrylphenol polyoxyethylene ether and sulfamic acid using urea as catalyst .

以三苯乙烯基苯酚聚氧乙烯醚和氨基磺酸为原料，合成了三苯乙烯基苯酚 聚氧乙烯醚硫酸酯铵盐。

The urea concentration to wash and purify protein was confirmed .

确定了洗涤和溶解包涵体的最佳 尿素浓度；

The N2 released from methanol synthesis can be used to synthesize ammonia for urea production .

甲醇合成弛放气中含N2又可用于合成氨加工成 尿素。

Reaction kinetics of the first stage in the process of urea sulfuric acid decomposing phosphorus rock ;

对用 脲硫酸溶液分解磷矿一步法制复混肥的工艺过程进行了系统研究。

The immediate effect of urea on the soil reaction is alkaline .

尿素对土壤反应的直接效果表现为碱性反应。

A clear thermosetting resin made from urea and formaldehyde and used in electrical fittings adhesives and finishes .

一种清亮的热硬化性树脂，由 尿素和甲醛制成，用于电器装备、粘合剂和末道漆中。

Studies on the characteristic of ammonia volatilization in soil surface applied urea compound fertilizer coated urea and coated compound fertilizer by the enclosure method .

应用密闭法对 尿素及其二次加工 产品&复合肥料、包膜尿素和包膜复合肥料在施入土壤后的氨挥发特征进行了研究。

Objective To evaluate the dry chemistry method for measuring serum urea and creatinine .

目的：对干化学法测定血清 尿素、肌酐的结果进行评价。

The method of synthesis guanidine nitrate from urea and ammonium nitrate in the presence of catalyst is discribed in this paper .

以 尿素和硝酸铵为原料，在催化剂的存在下合成硝酸胍。