一硝酸盐

As a resultant of Nitrite nitrogen(NO2——N),nitrite-NH2 has been listed into the list of carcinogens with its hazardousness to the health of human being and livestock.in this paper based on ISO/TS 14256-1 method,a series of measuring method of nitrite nitrogen in soil was set up,with the merits of rational relativity in calibrated curvilinear equ...

它是一种公认的致癌性污染物，亚硝酸盐可形成致癌物亚硝胺，危害人畜的生命健康。该研究在ISO/TS 14256-1方法基础上，建立了一套系统的土壤质量亚硝酸盐氮测定方法。方法适用于土壤中亚硝酸盐氮含量的测定，方法操作可靠。校准曲线方程具有良好的相关性，方法检出限较低，灵敏性好。

A salt or an ester of malic acid.

硝酸根，硝酸盐一价的根NO3或包含它的化合物，如一种硝酸盐或者酯

Groundwater has been polluted by nitrates is the issue of public health departments and environmental agencies ③④ the concerns of a major event because of high nitrate levels in drinking water can cause young children methemoglobin disease ⑤.

地下水①被硝酸盐②所污染这一问题是公共卫生部门③和各环保机构④所关注的一件大事，因为饮用水的硝酸盐含量过高会造成幼儿高铁血红蛋白症⑤。

The results show that the organic-inorganic specialty fertilizer 〔16-6-8-20 〕is favorite to the yield increase and nitrate content decrease against tumorous stem mustard, and the inorganic fertilizer type Ⅱ(19-7-9) follows. Single superphosphate is better than monoammonium phosphate in increasing the yield whilst poorer in decreasing its nitrate content,sulfate of potash is better than muriate of potash in increasing the yield while weaker in decreasing its nitrate content,and fused calcium magnesium phosphate shows little desired effects.

结果表明：有机无机型专用肥〔16-6-8-20〕对茎瘤芥增产和降低其硝酸盐含量的作用最佳，其次为无机型专用肥Ⅱ(19-7-9)，过磷酸钙对茎瘤芥增产效果优于磷酸一铵，但降低其硝酸盐含量不及磷酸一铵，硫酸钾的增产作用优于氯化钾，但氯化钾降低硝酸盐含量的效果较好，钙镁磷肥对其增产和降低硝酸盐含量的效果均差。

The concentration of nitrate was determined indirectly through the effect of nitrate revivification enzyme on nitrate in the existence of NADPH.

在NADPH存在的条件下，通过硝酸盐还原酶将硝酸盐还原为亚硝酸盐，间接测定蔬菜中硝酸盐质量浓度，为检测蔬菜中硝酸盐质量浓度提供一种新方法。

To coat with a film of silver nitrate or other silver salt.

镀银盐给镀上一层硝酸盐或其它硝酸盐

The univalent radical NO 3 or a compound containing it, as a salt or an ester of nitric acid.

硝酸根，硝酸盐：一价的根NO 3或包含它的化合物，如一种硝酸盐或者酯

The univalent radical NO3or a compound containing it,as a salt or an ester of nitric acid.

硝酸根，硝酸盐一价的根NO3或包含它的化合物，如一种硝酸盐或者酯

Assimilatory nitrate reductase is a soluble, multiple center redox enzyme that catalyses the two-electron reduction of nitrate to nitrite using pyridine nucleotide as a electron donor.

植物中的硝酸盐还原酶(nitrate reductase，NR)作为限速酶，催化硝酸盐还原为亚硝酸盐，这一过程在氮代谢中处于关键地位，对植物生长发育、产量形成有重要影响。

The contents of chlorophyll and the catalase activity of celery were increased 19.06%, 6.52% in the once top-dressing treatment with 300ml biogas slurry (A1I) than that applied chemical fertilizer (A1I).

其中一次施用300ml沼液的追肥处理(A1I)比化肥处理（B1I）对芹菜的叶绿素含量、过氧化氢酶活性分别提高了19.06%、6.52%；一次施用900ml沼液的追肥处理(A2I)比化肥处理（B2I）对芹菜的VC含量、还原糖含量分别提高了9.07%、51.31%，硝酸盐含量下降了31.65%；且施用沼液时一次施用与分次施用对芹菜的品质、产量无显著影响，化肥的分次施用与化肥的一次施用相比，芹菜的硝酸盐含量显著降低。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。