硝酸

The nitric acid changed the cuticle of his mouth to a yellow color.

硝酸将他口腔里的护膜变成了一种黄颜色。

The authors suggest that the traces of nitric acid may be removed by boiling cyclonite in an autoclave at 140℃.

研究者们提出，微量的硝酸，可于140℃下在压热器中煮洗除去。

Objective:To investigate the effect of rapid decalcification by Lightwave/microwave nitric acid method on the antigenicity of osseous tissue .

目的：探讨光波微波硝酸快速脱钙技术对骨及软组织抗原活性的影响。

For the thermolysis carried out under a residual pressure of 5 X IO-2 mbar it can be seen that the dehydration of nickel nitrate finishes before the denitration starts.

在5 X IO-2 毫巴余压下的热解实验中，可以看出在脱硝开始前，硝酸镍的脱水已经结束。

A new denitration process of UNH which is reduced pressure vibro fluidized bed with microwave heating is well worth research based on the denitration kinetics characteristics of UNH.

根据六水硝酸铀酰的脱硝动力学特性，将微波加热减压振动流化床用于UNH的脱硝过程，是一个很有价值的脱硝工艺。

Moreover, the future application prospect and further study trend of aerobic denitrification were proposed.

并对亚硝酸型硝化反硝化的应用前景进行了展望，提出了其今后的研究方向。

The results revealed that the denitrification optimal pH and temperature was at pH 7.5 and 30℃.

在实验结果中，最佳脱氮的酸碱度为 pH 7.5、而脱氮菌最适生长温度为30℃，在持续反应96 小时每12 小时检测一次，硝酸氮从 3500 ppm 降至240 ppm ，其脱氮率为90﹪以上。

The technology of biological nitrogen removal by nitrosification denitrification, which has been developing a few years, is the combination between the oxidation of ammonia and the deoxidation of nitrite.

亚硝酸型硝化反硝化生物脱氮技术是近年来发展起来的新型的生物脱氮技术，其实质是氨的氧化与亚硝氮的还原相偶联。

The intermediate of flazasulfuron weedicide ,2-amino-4,6-dimethoxypyrimidineis conveniently obtained by treating 2-amino-4,6-dihydroxypyrimidinewith diazomethane at 20 °C for 24h.

本文利用硝酸胍和丙二酸二乙酯为起始原料，经环合及甲氧基化两步反应得到除草剂啶嘧磺隆的中间体：2-氨基-4，6-二甲氧基嘧啶。

Objective To study resonance light scattering spectra of diazotization- coupling reaction and establish a new method for the determination of trace nitrite.

目的 研究重氮化－偶联反应的共振散射光谱并应用于亚硝酸根的测定。

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。