硝酸

Copper-containing nitrite reductases ; Electron transfer ; Catalytic mechanism ; Denitrification

铜型亚硝酸还原酶；电子传递；催化机理；生物脱氮

The present paper reports three new europium complexes,EuL3(H2O) 6,EuL3Phen(H2O)4 and EuL3(H2O)5,synthesized with Eu(NO3) 3·6H2O,2-(4-fluorobenzoyl) benzoic acid,Phen and TPPOL=2-(4-fluorobenzoyl benzoic acid,Phen=1,10-phenanthroline,TPPO=triphenyl phosphine oxide.

以硝酸铕、2-(4-氟代苯甲酰基)苯甲酸、1，10-菲咯啉和三苯基氧膦合成了EuL 3(H2O)6，EuL3Phen(H2O) 4和EuL3(H2O)5三种固态配合物。

After 14D and 28D, Observe the color of the leaves,Count the number of leaves and respectively measure the seedling's height、root long、wet weight、dry weight、relatively water content、chlorophyll content、soluble sugar content、proteid content、nitrate reductase activity and Peroxide enzyme activity to discuss the effect of each element to the tomato seedling.

为材料，进行缺氮、缺磷、缺钾、缺铁的溶液培养，分别在培养14d和28d后观察其叶色，计算叶数并测定了各缺素植株的株高、根长、鲜重、干重、相对含水量、叶绿素含量、可溶性糖含量、蛋白质含量、硝酸还原酶活性和过氧化物酶活性。

5 Mol/L nitric acid solution in nozzle plate pulsed column have been studied.

研究了喷嘴板脉冲萃取柱中正辛醇- 0 5mol/L硝酸体系的液泛通量、分散相存留分数等流体力学特性。

The invention relates to a preparation method of epsilon-MnO2 layered structure nano-sphere comprising the following steps: adding potassium persulphate, manganese sulphate, ferric nitrate and concentrated sulfuric acid into hydrothermal reactor, charging deionized water and fully stirring, natural cooling the mixture to room temperature after hydrothermal reaction for 1-24 hours at 110-200 DEG C, washing and drying the product to obtain hexagonal crystal epsilon-MnO2 layered structure nano-sphere with a stable structure and uniform grain size.

一种ε-MnO 2 层状结构纳米球的制备方法，将过硫酸钾，硫酸锰，硝酸铁，浓硫酸加入水热反应釜中，加入去离子水充分搅拌后，在110-200℃水热反应1～24h后自然冷却至室温。得到的产物经洗涤干燥即得到结构稳定，粒径均匀的六方晶型的ε-MnO 2 层状结构纳米球。

Northern blotting analysis indicated that 5 genes, nitrate transporter gene, nitrite reductase gene, ammonium transporter gene, ATP-binding cassette transporter gene, and purine permease gene, were significantly up-regulated under nitrogen starvation.

Northern blotting验证其中5个基因，包括硝酸盐转运蛋白基因、铁氧化还原蛋白亚硝酸还原酶基因、铵盐转运蛋白基因、结合ATP盒的转运蛋白基因和嘌呤透过酶基因，在缺氮诱导条件下转录水平有明显上调。

Ceric ammonuim nitrate and sodium bromate series oxidation system was used selectively to oxidize oximes into the corresponding aldehydes and ketones in water.

在水溶液中，用硝酸铈铵溴酸钠串联氧化体系对肟进行选择性氧化生成相应的醛

The experimental results indicate that the nitrite oxidizers are more sensi-tive to free ammonia than ammonia oxidizers in the wastewater.

结果表明，在高游离氨条件下，硝酸菌比亚硝化菌对游离氨更为敏感，反应体系中亚硝酸盐的平均积累速率远大于硝酸盐的平均积累速率。

A variety of chemical carcinogens as diverse as benzene, cigarette smoke, and nitrites can initiate and/ or promote this process.

多种多样的化学致癌物如苯、烟、硝酸盐都能够引起促进肿瘤的发生。

The company mainly produces nitric acid lead, copper sulfate, lead antimony alloy, seven water zinc sulfate, heavy calcium carbonate, talc, the output value of more than 10 million.

公司主要生产硝酸铅、硫酸铜、铅锑合金、七水硫酸锌、重质碳酸钙、滑石粉等，年产值1000多万元。

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。