查询词典 urea

A series of urea,thiourea and thiodiazole derivatives bearing mercaptotetrazole were synthesized using NaN_3 as a nitrogen source.

以叠氮化钠为氮源，合成了一系列含四唑环的芳基脲及噻二唑类化合物，其结构经1H NMR，IR和元素分析表征。

Nickel sulfate was the most frequent sensitizer, followed by Thimerosal, Potassium dichromate, Fragrance mix and Formaldehyde. Frequencies of contact allergy to Thiuram mix, Mercapto mix, Imidazolidinyl urea, and bronopol were relatively low.

结果： 1 129 例受试者中，阳性反应747例，阳性反应率较高的变应原依次是：硫酸镍、硫柳汞、重铬酸钾、芳香混合物、甲醛，阳性反应率较低的变应原有：秋兰姆混合物、硫氢基混合物、咪唑烷基尿素、溴硝丙二醇。

The addition of sucrose or urea causes significant changes of the thixotropic behavior of grifolan solutions.

添加蔗糖或尿素时，溶液之摇变性质发生显著的改变。

With titanyl sulphate and commercial urea as the raw material ,nanometer TiO2 is a material of environment,it with a close size distribution and fine dispersion was prepared by homogeneous precipitation.

本文以硫酸法钛白粉生产中产生的硫酸氧钛和工业品尿素为原料，采用均匀沉淀法制备了粒度分布窄，分散性好的纳米级TiO_2环境材料。

In a pot experiment with spring wheat and buckwheat as test crops and with thiophosphric triamide and dicyandiamide as test inhibitors, the transformation, regulation and residual effect of 〓N-labelled urea were studied.

采用〓N标记的尿素，以N-丁基硫代磷酰三胺和双氰胺为供试抑制剂，春小麦和荞麦分别为供试作物进行尿素N转化的调节及其残效盆栽试验。

Virtually every enzyme in glycolysis, gluconeogenesis, the tricarboxylic acid cycle, the urea cycle, fatty acid metabolism, and glycogen metabolism was found to be acetylated in human liver tissue.

这一命题中的关键之处在于乙酰化在生物调控中的重要作用。目前蛋白质组学已经发现了上千的被乙酰化的哺乳动物蛋白，中国科学家的这些发现证明了代谢酶。

The experimental research on the NOx and SO2 emission in aqueous solution of urea/triethanolamine was performed by a set of two filling absorption towers.

尿素溶液与NOx反应生成N2和CO2气体，可实现烟气同时脱硫脱硝，该文进行了尿素/三乙醇胺湿法脱硫脱硝的试验研究。

The invention provides a foliar fertilizer specially used for Chinese gooseberries, which has the functions of cold resistance and consists of the following raw materials according to weight percentage: 0.1 to 8 percent of DMSO, 0.05 to 5 percent of trimethylene glycol, 0.05 to 5 percent of salicylic acid, 0.05 to 2 percent of compound ammonium nitrate, 1 to 15 percent of humic acid, 0.5 to 10 percent of chitosan, 1 to 10 percent of citric acid, 2 to 15 percent of urea, 1 to 10 percent of borax, 1 to 20 percent of zinc sulfate, 0.5 to 10 percent of ferrous sulfate, 0.05 to 5 percent of ammonium molybdate, 1 to 15 percent of manganese sulfate, 0.1 to 2 percent of SDBS and 35 to 80 percent of water.

本发明提供一种具有抗寒作用的猕猴桃专用叶面肥，它由下述各组分重量百分比的原料组成：二甲基亚砜0.1％～8％、丙二醇0.05％～5％、水杨酸0.05％～5％、复硝铵0.05％～2％、腐殖酸1％～15％、壳聚糖0.5％～10％、柠檬酸1％～10％、尿素2％～15％、硼砂1％～10％、硫酸锌1％～20％、硫酸亚铁0.5％～10％、钼酸铵0.05％～5％、硫酸锰1％～15％、十二烷基苯磺酸钠 0.1％～2％、水35％～80％。

Nitrogen forms in compound fertilizer affected biomass accumulation of maize too,and the highest dry weight of shoot and root was found in the plants supplied with compound fertilizer containing 100% urea nitrogen in Udic Isohumisols,and mixed nitrate and ammonium in Udic Cambosols.

生长45 d玉米苗的地上和地下部的生物量，在黑土上均以全酰胺态氮的配方最高，地上部干重较其他配方增加10%左右；而在潮土上则以铵态氮与硝态氮配方的效果最好，铵态氮和酰胺态氮混合的配方在2种土壤上均较差。

The results showed as follows:Maize grown in the treatment of compound fertilizer containing urea alone had significantly lower germination rate than the maize receiving mixed CO(NH2)-N/NH4+-N or mixed NO3——N/NH4+-N in compound fertilizers in Udic Isohumisols.However,there was no significant affect of nitrogen forms on maize germination rate in Udic Cambosols.

结果表明，在黑土上，施用酰胺态氮为单一氮素形态的复混肥料时，玉米的出苗率明显下降；而用部分铵态氮替代酰胺态氮后制成的混合态氮和由铵态氮与硝态氮构成的复混肥对玉米的出苗率影响较小；不同氮素形态配比的复混肥对潮土上生长的玉米出苗影响较小，各处理的出苗率可达到90%以上。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。