查询词典 ammonia

Compared with oxygen as an oxygenant, the advantages of this method are that reaction time is shorten to half, reaction temperature is lowed about 40℃ and utilization rate of ammonia is increased.

与用氧气作氧化剂相比具有不需耐压设备，反应时间缩短一半，反应温度降低40℃左右，氨利用率提高的优点。

The phytotoxin can restrain the activities of peroxidase , polyphenol oxidase and phenylalanine ammonia lyase that existed in the tree, and so reduce the resistance of the host tree and benefit the fungus to intrude into the tree successfully.

该毒素能抑制寄主组织中过氧化物酶、多酚氧化酶和苯丙氨酸解氨酶的活性，降低寄主树木的抗御能力，从而有利于菌突破寄主的生理防御屏障而成功地侵染生长。

Now, a convenient, efficient pinacol coupling of aldehydes mediated by zinc in good yields has been carried out in ammonia water in the presence of a little crown ether. Adding a small amount of crown ether was highly effective to enhance the yields of pinacol from 63% to 84%.

本文报道一种简便、有效的水相呐偶合反应，它是在含有少量冠醚的稀氨水溶液中，使用锌粉促进醛基化合物进行水相呐偶合反应，其中加入少量的冠醚有助于提高反应的产率，呐醇产率由63%提高到84%。

A phenylalanine ammonia-lyase gene was cloned from Pittosporum tobira.

从海桐中克隆得到苯丙氨酸解氨酶基因cDNA片段，并命名为PitPAL，GenBank登录号为AY747678。

This paper studied the effects of ammonia-N and sulfureted hydrogen on the livability, metamorphosis rate and daily growth of Portunus trituberculatus larvae.

研究了氨氮和硫化氢对三疣梭子蟹各期幼体存活率、变态率和日生长率的影响。

Completeseparation of air and propene plus ammonia.

空气和丙烯氨气混合物的完全分离。

Danshensu and protocatechualdehyde, the water soluble ingredients of SM, were absorbed to blood in rats by oral, and 75% ethanol and ammonia extracts of SM, sodium danshensu and protocatechualdehyde, obviously increased OD in the experiment of amphotercin B cell model and the expression of CYP7AmRNA in BRL cell line.

丹参水溶性成分丹参素和原儿茶醛口服后均能吸收入血，丹参75％乙醇提取物和丹参氨水提取物及其部分单体，在两性霉素B细胞模型实验中均能明显增加OD值，同时亦能明显增加肝细胞CYP7AmRNA表达。

The effects of liquid to solid ratio, ammonia amount used for pre-aminating, pyrogenation temperature and time on the product quality were investigated.

研究液固比、Mg2+用量、预氨量、热解温度和热解时间对产品质量的影响。

By setting the retting duration of 20 hours, the factors affecting the residual gum percentage of the retted kenaf fibers are studied. The experimental results show clearly that the following factors have the significant influence on the residual gum percentage of the retted kenaf fibers and show the obvious variation tendency. The preferred processing parameters are as follows: pH value 7. 0、bath ratio 1: 50、reuse percentage of retting liquid 50%、air flow volume 2. 5L/min、temperature 40℃、nitric additives (ammonia is better than nitrates) percentage 0.45%.By comparison with anaerobic retting, the retting duration using aerobes is much shorter than that using anaerobes.

确定了以好氧微生物脱胶作为本课题的脱胶路线后，在特定的脱胶时间（20小时）条件下，通过分析不同参数条件下的残胶率，研究了好氧微生物脱胶的各种影响因素对红麻脱胶的影响规律，并优选出最佳脱胶液回用比为50％，最佳pH值为7.0，最佳气流量为2.5L/min，最佳浴比为1：50，最佳水浴温度为40℃，最佳含氮添加剂为铵盐类化合物，最佳含氮添加剂用量为0.45％。

The result of the test showed that the fed quantity of TiO2 was 1.25 mg／mL,the photocatalytic degradation of the pyridine was in conformity with the first order kinetic equation,the feeding of 0.2％H2O2 obviously increased the degradation rate of the pyridine and the nitrogen in the pyridine converted into ammonia nitrogen;the pearlite-loaded TiO2 had the same catalytic effect as that of powered TiO2 and was easy to recover and reutilize.

以钛酸四丁酯水解法制备TiO2，采用溶胶一凝胶法在膨胀珍珠岩上负载TiO2，在UV-TiO2体系中对水中吡啶进行光催化降解，结果表明：TiO2加入量为1.25mg／mL，吡啶的光催化降解符合一级动力学方程，加入0.2％H2O2可明显加快吡啶的降解速度，吡啶中氮转化为氨氮，珍珠岩负载型TiO2与粉末TiO2具有相同的催化效能，且便于回收和重复使用。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。