硝酸

In HCl medium, iodate oxidizes hydroxylammonium chloride to form nitrite, which can produce a red azo dye with the reaction of p nitroaniline and α naphthylamine.

基于碘酸根在稀盐酸介质中氧化盐酸羟胺产生亚硝酸根，而亚硝酸根和对硝基苯胺重氮化后可以与α-萘胺偶联产生红色偶氮染料，提出了分光光度法测定碘的新方法。

According to Griess reaction, diazonium-salts formed from aromatic amines such as sulfonamides etc., react with NaNO_2 in acid medium and may be coupled with α-naphthylamine or diphenylamine to produce red colored compounds.

一按Griess反应芳香族胺类的重氮化鹽，如对氨基苯磺醯胺类药物等，在酸性溶液中皆能与α-萘胺或二苯胺分别偶合成偶氮色素而显紅色，过多之亞硝酸可与氮色素再作用使紅色消失而呈棕黄色。

In this paper,the adsorption behavior of quadrivalent,pentravalent and hexavalent neptunium on silica gel in nitric acid solutions was investigated by batch experiment.

本文研究批式实验条件下，硝酸溶液中Np、 Np和Np在硅胶上的吸附行为。

The preparation procedure is as following: purification and assay for purity of neptunium, preparation of neptunium nitrate solution, making solution for ageing, subpacking the solution to ampoules, fire sealing, weighing for earch ampoule, homogeneity test, stability test, and certification.

以工厂的氧化镎作原料，经原料提纯→纯度鉴定→配成硝酸溶液→放置陈化→分装→火封→称重→均匀性检验→稳定性检验，最后进行定值。

objectiveto analyze the total content of flavonoids in nigella glandulifera preyn et sint by colorimetric method.methodsrutin was used as reference substance and the detection wavelength was 500 nm.

目的采用比色法测定维吾尔药黑种草子中总黄酮的含量。方法以芦丁作对照品，以亚硝酸钠-硝酸铝-氢氧化钠体系为显色剂，检测波长为500 nm。

The different light treatment had no obvious effects on the growth of fungus mycelium and spore germination. Sucrose, niter and subniter were the best C and N sources in axenic culture of the pathogen.

病原菌在不同光照条件及在不同碳、氮源上均能生长，不同光照条件对其影响无显著差异；以蔗糖为其最适碳源，亚硝酸

The proposed method has been applied to the determination of nitrate in water with satisfactory results.

实验了多种干扰离子的影响，用於水中硝酸根离子的测定，结果满意。

The level of NO in the brain tissue was determined by nitrate reductase method.

以硝酸还原酶法测定脑组织中的NO水平。

The research aimed to study the relation between rice seed germination and nitrate reductase activity.

研究杂交稻种子的萌发与硝酸还原酶活性的关系。

61Healthy persons were selected as healthy group. The serum concentration of TGF-β1 was measured by ELISA method; nitre oxide was measured by nitrit reductase method, plasma Ang II was measured by radioimmunoassay.

对高血压病人和61例健康对照者应用酶联免疫吸附法测定血清TGF-β_1浓度，硝酸还原酶法测定NO的浓度，放射免疫分析法测定Ang Ⅱ水平。

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。