硝酸

The adsorption behaviour of Rhodium on the melamine resin in nitric medium and the relevant factors effecting on the adsorption have been studied.

研究了在硝酸介质中蜜胺树脂对铑的吸附行为及其相关的影响因素，并对其吸附机理进行了初步探

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。

Nitroglycerine was produced by mixing glycerine with sulfuric and nitric acid. It was considered too dangerous to be of any practical use.

硝化甘油由混合甘油与硫磺酸及硝酸制造而成，它曾被认为过于危险而不致实用。

The ventilation oxidation and ultrasonic pretreatments were beneficial to the extraction rate, but the increase effect was not obvious.

结果表明，采用硝酸对试验样品进行预处理提取率最佳，通空气氧化和超声处理对提取率有益，但是提升效果不明显。

The conversion and selectivity of oxidation of 2-octano l to hexanoic acid by nitric acid using the mixed-addenda heteropolyacid H15- xPMoxV12-xO40·nH2O(n=20-40)as the catalys t were studied.

采用磷、钼、钒系列多元杂多酸作为硝酸氧化仲辛醇制己酸的催化剂，对其催化性能和选择性进行了实验研究。

The samples were digested in the mixed acid of HClO4-HNO3 (1+3) under low temperature, and so made into transparent grass-green solution of sample.

在低温下用高氯酸－硝酸(1+3)消解样品，配制成透明的草绿色样品溶液。

objective: to research the scavenging effect of tea on no2- in simulated vitro gastric juice.

目的 在体外模拟胃液条件下探讨了茶叶对亚硝酸根离子的消除规律。

At 80℃, the yield of esterification of benzoic acid with ethanol could reach 95% by using 10% catalyst for 6 h; the conversion of toluene in the nitration with 1 equiv. of 65% nitric acid could be achieved to 99% by using 5% catalyst for 5 h.

在80℃下，摩尔分数为10%的Yb(NTf2)3负载催化剂，反应6h可使苯甲酸乙酯的产率达95%；摩尔分数为5%的Yb(NTf2)3负载催化剂，反应5h可使甲苯与等摩尔质量分数为65%硝酸的硝化反应转化率达99%。

In order to solve the problem of accumulation of phosphogypsum, which is a byproduct in the process of nitrophosphate production by freezing method, using phosphogypsum, ammonium carbonate and ammonia as raw materials, ammonium sulfate and calcium carbonate were prepared by double decomposition reaction, and the recycling utilization of sulfur resource was realized.

为了解决冷冻法硝酸磷肥生产中深度除钙副产磷石膏的堆积问题，以磷石膏、碳酸铵和氨水为原料进行复分解反应制备硫酸铵和碳酸钙，以实现硫资源的循环利用。

Usual chromic and nitric acid bright dips for cadmium are not chromate treatments.

通常铬和硝酸明亮镉逢低不铬酸盐处理。

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。