nitrogen 六级考研GMAT

The corresponding solving methods,exsiting in the determination of the amino nitrogen by Nashi colormetric method.

针对纳氏比色法测定氨氮过程存在的问题,提出了相应的决办法。

Every tonne of coal contains,on average,30 kilograms of nitrogen.

每吨煤平均含30公斤氮。

Conclusions Obvious negative nitrogen balance and hypoalbuminosis occur after surgery for tumors of digestive system.

结论消化道肿瘤病人术后可出现明显的负氮平衡和低蛋白血症。

Algae microorganisms in the water overpopulate because of the surplus nitrogen.

水的藻类微生物由于氮的富余而过度繁殖。

Procarbazine, nitrogen mustard, and ifosfamide, which can increase risk for myelodysplastic syndromes and acute myelogenous leukemia.

丙卡巴肼、氮芥和异环磷酰胺：可增加患骨髓增生异常综合症和急性粒细胞白血病的风险。

"There are several kinds of gas in the air, with nitrogen amounting to the most part."

"空气有好几种气体,氮所占的比重最大。"

Nonsoluble nitrogen (NSN) and soluble nitrogen (SN) in ten tobacco samples were determined with a flow analyzer.

采用流动析法测定了10种烟草的不溶性氮和可溶性氮。

After the precursor's thermal decomposition under the protection of nitrogen,a kind of nonstoichiometric titanium oxide can be prepared.

用钛粉和草酸应制得驱物,在氮气保护下600℃热驱物制备了一种非化学计量钛氧化物。

The wastewater of hexanolactam (nylon) fiber production in Shijiazhuang Synthetic Fiber manufactory is high concentrated with organic nitrogen compounds.

己内酰胺锦纶化纤废水属于高含氮高浓度有机废水。

The cryoprobe soaked in liquid nitrogen is a new cryother- apic instrument with metallic material as its cold storage.

浸冷式液氮冷刀,系用金属材料为储冷装置的新式冷冻治疗器械。

With calcium chloride precipitant to eliminate the interference of PO43-, total nitrogen in compound fertilizer is determined by formol method.

用氯化钙作沉淀剂，消除磷酸根离子的干扰，用甲醛法测定复合肥的总氮。

The function of hydrocarbons and nitrogen oxides in photochemical smog formation and the formative process of ozone and peroxyacetyl nitrate are discussed.

介绍了氮氧化物、碳氢化合物在形成光化学烟雾的作用和臭氧、过氧乙酰硝酸酯产生的过程,并介绍了光化学烟雾的形成机理。

In the last few years,the tripodal ligands bearing nitrogen atoms have drown much attention because of their polydentate,flexility and ease to synthesize.

近年来,含氮三角架配体由于其多配位点、半刚性及易合成等特点,引起了人们的广泛兴趣。

It was found that the sulphonamide group and the substituents on nitrogen atom within the molecule would effect the properties of these dyes.

坚牢度和光谱特性,发现磺酰胺基和在它的氮原子上的取代基会影响该类染料的性能。

A method for determination of nitrogen in N-MnFe by titrimetry with amidosulfonic acid after alkaline distillating separation has been studied in this paper.

本文研究了强碱蒸馏离-氨磺酸滴定法测定氮化锰铁氮的析方法。

The results indicate that the modification by heating and acids could not significantly increase the adsorption capacity of the modified stellerite for ammonia nitrogen.

结果表明，加热改性与无机酸改性不能显著提高沸石对氨氮的吸附量。

Two different kinds of palladium complexes of nitrogen containing polymere havebeen prepared and their catalytic actions for p -nitro -methyl benzfene have been invertigeted.

制备了两种不同的含氮高子-钯络合物，并研究了它们对对硝基甲苯的催化活性。

Triaminoguanidine is a kind of non-azide nitrogen-rich flammable compound, which has some advantages of high nitrogen, good thermal stability, and high positive formation enthalpy, etc.

摘要三氨基胍是一种非叠氮类、富氮型、可燃性化合物，其系列含能化合物具有高的正生成焓、热稳定性好、氮含量高等特点。

It is equipped with asphalt return tube, anti-puffing pressure vent valve, anti-aging overhead nitrogen valve, thermometer, volumeter and output asphalt rapid discharge valve and coupling.

配备沥青溢流管、防冒液呼吸阀、防老化顶置充氮阀、温度计、容量计和输出沥青的快速卸料阀及接耦。

The water eutrophication is caused by the incessant accumulation of nitrogen and phosphorus in water and excessive propagation of a few of algal and hydrobios.

摘要水体氮磷营养物质不断积累，部藻类及水生生物的过度繁殖，导致了水体的富营养化。