查询词典 nitrogen

The relation between the performance of hot rolled plate and the nitrogen content in the steel are discussed.

讨论了热轧板性能与钢中氮的关系；指出了钢中氮质量分数的减少可降低热轧板屈服强度，且满足供冷轧基料的要求。

Adding nitrogen and phosphorus also aids in preventing the absorption of aluminum and gives a good, clear pink hydrangea colour.

钠和磷的加入亦有助於阻止铝的吸收，给绣球花带来一美好清澈的粉红色。

Compared with the year of 2002, the polluted ranges of offshore marine areas, such as the estuaries and loughs expanded to some extent in 2003, with the main pollutants including: petroleum, inorganic nitrogen, activated phosphate, hydrargyrum and so on.

大部分海域海水水质基本良好，符合清洁、较清洁海水水质标准，远海、近海海水水质优于近岸；与2002年相比河口、港湾等近岸海域污染范围有所扩大，主要污染物是石油类、无机氮、活性磷酸盐和汞等。

Hydrargyrum concentration in the offshore marine areas, inorganic nitrogen concentration in the marine areas of Xiamen, Quanzhou Gulf, Sandu'ao Gulf and the Min River Estuary, and activated phosphate concentration in the Sandu Gulf and Xiamen's marine areas exceeded the standard respectively.

三沙湾、三都澳、闽江口、福清湾、兴化湾、泉州湾、厦门海域、东山湾、诏安湾局部海域海水中石油类含量超标；闽江口近岸海域海水中汞含量超标；厦门海域、泉州湾、三都湾、闽江口海域海水中无机氮含量超标；三都湾、厦门海域海水中活性磷酸盐含量超标。

In the fourth chapter, four new complexes of hydrazide of podophyllic acid with transition metals have been prepared. Elemental analysis, molar conductivity, IR,〓 NMR and TG-DTA were used to characterize them. The results show that general formula of the complexes is M〓(n=0 or 2). The ligand is linked through the carbonyl oxygen and the terminal nitrogen of the hydrazide base to the transition metal ions in bidentate mode.

第四章 合成了四种鬼臼酰肼的过渡金属配合物，通过元素分析、摩尔电导、红外光谱、核磁共振氢谱和热重-差热对配合物进行了表征，研究结果表明，配合物的组成为M〓（n=0或2），配体是通过羰基氧和肼基上的端氮以双齿形式与金属离子配位的。

However, similar fluoroionophoric behavior is also observed for compounds without the hydrazone group, revealing that the amino nitrogen atom rather than the hydrazone group is responsible for interactions with Cu2+. Thus, the interpretation of fluoroionophoric behavior in the literature needs to be reexamined.

然而，进一步比较不具腙取代基的类似化合物感应行为，显示胺基的氮原子才是主要与铜离子作用的部分，而非官能基腙，因此，文献所报导之感应行为有必要进一步厘清。

Benzaldehyde nitrogen mustard isonicotinoyl hydrazone was synthesized according to literature method. The copper , cobalt , nickel , chromium , iron , zinc and cadmium complexes of it were prepared and characterized by elemental analysis, IR, UV-vis, NMR and EPR spectra. The cytotoxicity effect of the complexes was examined on SMMC-7721 cell line. Results show that the complexes have definite antitumor activity and the synergic effect between chromium and the ligand.

依照文献合成了异烟肼苯甲醛氮芥腙及其铜、钴、铬、镍、铁、锌和镉配合物并用元素分析、红外、电子光谱、核磁共振及电子顺磁共振光谱，对这些配合物进行表征，确认了它们可能的立体结构，并研究它们对SMMC-7721人肝癌细胞的作用，结果表明它们均有一定的抗肿瘤作用，发现铬与配体存在有协同作用。

What you have to address are the sources of hydrocarbon and nitrogen oxide emissions.

对于天气和地理是无能为力的，你能对付的就是碳氢化合物和氮氧化合物的排泄源头。

China mainly natural gas used in the production of nitrogen, followed by the production of methanol, formaldehyde, acetylene, methylene chloride, carbon tetrachloride, carbon disulfide, nitromethane, hydrocyanic acid and extraction of helium and carbon black. Since the 70s, has built more than natural gas and oil field associated gas as raw materials for large-scale ammonia plant, as well as a number of small and medium-sized ammonia plant, so that the national structure of the synthetic ammonia production of raw materials, natural gas share of about 30%; also be built at the same time A system of acetylene gas plant to manufacture Vinylon and vinyl acetate, acetylene gas used in the production of methanol.

中国天然气主要用于生产氮肥，其次是生产甲醇、甲醛、乙炔、二氯甲烷、四氯化碳、二硫化碳、硝基甲烷、氢氰酸和炭黑以及提取氦气。70年代以来，已兴建多座天然气和油田伴生气为原料的大型合成氨厂，以及一批中、小型合成氨厂，使全国合成氨生产原料结构中，天然气所占的比例约达到30％；同时还兴建了天然气制乙炔工厂，以制造维尼纶和醋酸乙烯酯，乙炔尾气用于生产甲醇。

Systems that have been purged clean of the fluorine/nitrogen mixture still may contain hydrofluoric acid.

已经清除了氟/氮混合物的系统仍然可能还有氢氟酸。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。