查询词典 nitrate

By comparison of long-term exposure with long-term immersion, the release amount of ammonium, nitrite, nitrate and dissolved phosphorus into the overlying waters from the sediments were increased during the reflooding after long-term dessication, reflecting that long-term exposure stimulated sediments as a releasing source of nutrient and accelerated the biogeochemical cycle of nutrient in the tidal flat ecosystem.

通过对比分析发现，长期暴露之后能够增加沉积物向上覆水体释放NH〓-N、NO〓-N、NO〓-N和TDP，显示了长期暴露加剧了沉积物作为营养盐的源效应，并且加速了潮滩生态系统内营养盐的生物地球化学循环过程。

Aluminium hydroxide, the precursor of alumina, was synthesized by precipitation reaction of the aluminium nitrate and sal volatile.

利用硝酸铝溶液和碳酸按溶液的沉淀反应制备一种氧化铝的前驱体－氢氧化铝。

It can be shown from experimental results, the diameter of the droplet in the W/O microemulsion which have dissolved reactant zinc nitrate and sal volatile is between 4.9 nm and 7.7 nm, 6.2 nm and 12.4 nm, respectively.

测定结果表明，微乳液中液滴大小均匀，分布很窄，直径分别在6.2～12.4nm和4.9～7.7nm之间，非常适合作纳米反应器来制备纳米粒子。

Hydroxylammonium nitrate-based liquid propellants have been pursued as liquid gun and rocket propellants for many years in America.

硝酸羟胺基液体推进剂作为火炮发射药和火箭推进剂，在美国已经使用多年，我国可能在不远的将来投入使用。

The effect of N forms and Ratios on iron nutrition in hydroponically grown lettuce were investigated. It was found that suitable ratioNO3--N:NH4+-N:CO(NH22 =6:6:0 in nutrient solution can significantly promote plant growth, raise chlorophyll content, improve plant iron utilization efficiency, and reduces nitrate content accumulation in leaves, and the cost of nutrient solution was thus reduced.

硝态氮、氨态氮与酰胺态氮及其不同配比对水培油菜铁素营养的影响试验，结果表明，不同形态氮素显著影响植物的铁素营养状况，NO_3~--N：NH_4~--N：CO(NH_2)_2为6：6：0的处理比单一NO_3~--N使用处理，能促进水培油菜生长，提高叶绿素含量，增加植物体内铁的活性，降低叶片中硝酸盐含量的积累，降低营养液成本。

The magnesium oxide nanocrystallites were prepared by means of a sol-gel method with malic acid and magnesium nitrate as raw materials.

以苹果酸和硝酸镁为原料，采用溶胶-凝胶法制备了氧化镁纳米晶。

A kind of low detonation velocity seismic explosive column charged with low detonation velocity explosive in which self-sensitized and improved expanded ammonium nitrate is oxidizer was investigated.

研究一种以低爆速膨化硝铵炸药为主装药的低爆速震源药柱。

Keywords physical chemistry;seismic explosive column;low detonation velocity;ammonium nitrate explosive;explosive property;safe property

物理化学；震源药柱；低爆速；硝铵炸药；爆炸性能；安全性能

This kind of low detonation velocity explosive is composed of 83%～87% expanded ammonium nitrate,3.0%～4.0% wood powder,2.0～3.0% composite fuel oil,4.0%～5.0% high energetic additives and 6%～8% dilution agent.

用自敏化改性膨化硝酸铵为氧化剂的低爆速膨化硝铵炸药的配方为：膨化硝酸铵83%~87%、木粉3.0%~4.0%、复合油2.0%~3.0%、高能添加剂4.0%~5.0%和稀释剂6%~8%。

It is discovered that the oxide thickness increases as the starting titanium iso-propoxide increases while other parameters are kept exactly unchanged, and accordingly, the peak redshifts initially and then blueshifts; Moreover, as the mass of silver nitrate increases, the peak redshifts and the absorption band goes wider; the synthetic temperature exerts no effect on the final shape and size of the prepared nanoparticles, only tolengthen the needed reaction time.

结果表明：二氧化钛壳层的厚度随异丙醇钛量的增加而不断增加，其紫外一可见吸收峰先红移，然后蓝移；随着硝酸银的质量的增加，银核的直径增加，并可观察紫外一可见吸收峰的红移，峰宽也逐渐变宽；合成温度的变化对包覆纳米颗粒的大小及形状没有明显的影响，只是改变了合成所需要的时间。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。