查询词典 Ammonia

The effects of solution\'s pH value, mol ratio between phenyl aldehyde and L-Arginine, concentrations of sodium chloride, ammonia chloride andL-Lystine, initial concentration of L-Arginine on precipitation rate of a -tolylene arginine were investigated, the results indicated that phenyl aldehyde precipitation method\'s appropriate pH value was higher than 11, suitable mol ratio between phenyl aldehyde and L-Arginine was 1.25, initial concentration of L-Arginine was must higher than 15g/L, sodium chloride had little effect on precipitation rate, on the contrary, ammonia chloride and L-Lystine had great effect on it, both of them must be eliminated; At the same time, adsorption isotherm at 25 C of L-Lystine on anion exchange resin A was measured, the result showed that the maximal equilibrium adsorbance was 30mg/g, the influences of solution\'s pH value, temperature, concentration of chloride ion on adsorption of L-Lystine by anion exchange resin A were also studied, the results indicated that appropriate operational pH value was 0.5 0.2, the effect of temperature on adsorption ratio was little, process could be operated at room temperature, the concentration of chloride ion must be eliminated.

考察了溶液pH值、苯甲醛与L-精氨酸摩尔比、氯化钠与氯化铵浓度、L-赖氨酸浓度、L-精氨酸初始浓度对苯甲醛沉淀L-精氨酸的影响，结果表明，沉淀反应的适宜pH值大于11，苯甲醛与L-精氨酸的适宜摩尔比为1.25，(来源：Aa6BC论文网www.abclunwen.com)L-精氨酸适宜的初始浓度在15g/L以上，氯化钠的存在对沉淀率基本上没有影响，而氯化铵和L-赖氨酸的存在使沉淀率下降；同时测定了25℃时阴离子交换树脂A吸附L-赖氨酸的吸附等温线，表明其最大平衡吸附量为30mg/g，考察了溶液pH值、温度、氯离子浓度对阴离子交换树脂A吸附脱除L-赖氨酸的影响，结果显示从L-精氨酸和L-赖氨酸混合液中吸附分离出L-赖氨酸的适宜pH值为10.5±0.2，温度对L-赖氨酸吸附率影响不大，吸附过程可在室温下进行，氯离子的存在使L-赖氨酸的吸附率降低。

Therefore, if it is abnormal in ammonia distilling section, the production of vitiol ammonia will be unqualified and the biochemistry section will be abnormal too.which will leads the transnormal of sewage let.

因此，蒸氨工序生产不正常，不仅硫氨工序的产品有可能不合格，而且会直接导致生化工序的不正常，致使焦化厂总排超标。

In the paper, the factors of the pressure of gas-gathering pipes and high-pressured ammonia water was controlled unstably in the period of Linhuan Coking Limited Liability Company began to product were analyzed, then effective methods about how the coke workshop and chemicals workshop coordinate to control the pressure of gas-gathering pipes and high-pressured ammonia water well in production were made.

文章对临涣焦化股份有限公司投产初期集气管压力与高压氨水压力控制中的不稳定因素进行了分析，并对炼焦车间与化产车间在生产中怎样配合来做好集气管压力与高压氨水压力的控制提出了行之有效的方法。

The selected process consists of several steps as follows. Firstly, ammonifying the oily mixture of PXA pyrolysis by ammonia or aqueous ammonia, then adding the organic solvent to extra

实验结果表明，合适的分离提纯工艺为：先将裂解产物用氨水氨化、有机溶剂萃取，然后用硫酸酸化11-CUA铵盐水溶液、再将粗品11-CUA于合适介质中结晶，得到高纯度11-CUA晶体；优化工艺条件为：氨化pH值8.0～10.0、温度25-35℃，甲苯为萃取剂，酸化pH值1.5～2.0、温度55-60℃，环己烷为结晶介质，粗品11-CUA在环己烷中溶解温度50～55℃、与环己烷初始质量比4：100、结晶前沉降分层时间10min、结晶温度20℃。

In liver, excess amino acids are deaminated to form ammonia and α-keto carboxylic acid. The ammonia then combines with carbon dioxide to form urea.

在肝脏，过剩的氨基酸被脱氨作用，而形成氨及 ___；之后氨就会结合二氧化碳，而形成尿素。

Moreover, the urea vaporizes the pH of quantity and soil to present a just related relation in the ammonia in the soil, when the ammonia vaporizes to have great capacity, the pH of the soil is worth to also go up.

另外，尿素在土壤中的氨挥发量与土壤的pH呈正相关的关系，氨挥发量大时，土壤的pH值也升高。

The ammonia volatilizing of fertilizer is suit to the dynamic equation as Y=a+bt, the coefficients in the equation are related to the kind of fertilizer, temperature and water content of soil, and the dynamic equation about ammonia volatilization including water and temperature and the is developed.

肥料氨累积挥发量符合零级反应动力学方程Y=a+bt，方程中系数与肥料种类、温度和土壤含水量有关，碳铵a、b值均比硫酸铵高，土壤含水量增大，a、b值降低，温度升高，a、b值增大，并由此得到含温度或土壤湿度因子的肥料氨挥发动力学方程，并建立了含水、热因子的肥料氨挥发水热耦合效应动力学方程。

Analyzes the design defects of ammonia condenser in SNAM ammonia stripping process urea plant and provides the improvement methods.

剖析斯那姆氨汽提法尿素生产装置中氨冷凝器的设计缺陷，提出改进措施。

Exploration is made for the demulsifier used for ammonia liquor and tar separation and the study on the effect of adding concentration of chemical on the tar and ammonia liquor qualities is done through the static test and industrialized test.

氨水焦油分离效果直接影响焦油及循环氨水质量，本文对氨水焦油分离中使用破乳剂进行了探索，并通过静态试验及工业化试验研究了药剂的添加浓度对焦油、氨水质量的影响。

The results confirm that NH3 slip increases with both higher ratio of NH3 to NO n(NH3/n and higher concentration of a reducing reagent, while it decreases with the increase of temperature. Initial NO concentration and its residence time can also affect the NH3 slip. A higher initial NO concentration lead to higher NH3 slip, but added residence time has the opposite effect. Among urea, ammonium carbonate and ammonia liquor, the NH3 slip of urea is the highest and that of ammonia liquor is the lowest.

试验结果表明：温度越高，漏失氨含量越低；随氨氮物质的量比的增加，NH3漏失含量不断增加；还原剂质量浓度越低，NH3漏失含量越低； NO初始浓度和停留时间对漏失氨浓度也有影响，NO初始浓度越高NH3漏失浓度越高，停留时间越长漏失氨浓度越低；不同还原剂NH3漏失浓度不同，尿素、碳酸氨、氨水3种还原剂中，尿素的NH3漏失浓度最高，氨水的NH3漏失浓度最低。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。