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nitrate
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  硝酸盐
    The Study of the Nitrate Removal in Groundwater Using Extractive Membrane Bioreactor
    萃取膜生物反应器去除地下水硝酸盐研究
短句来源
    FURTHER STUDIES ON THE DETERMINATION OF NITRATE IN SEA WATER WITH BSPB
    应用BSPB测定海水中硝酸盐的进一步研究
短句来源
    ELIMINATION OF HARDNESS AND NITRATE FORM DRINKING WATER BY THE CARIX ION EXCHANGE PROSS
    CARIX工艺去除饮用水中硬度和硝酸盐
短句来源
    NITRATE REMOVAL FROM GROUNDWATER BY SULFUR/LIMESTONE FILTER COLUMN
    硫/石灰石滤柱去除地下水中硝酸盐的研究
短句来源
    Studies on the effect of chemical nitrogen fertilizer on the nitrate contamination in vegetables
    化学氮肥对蔬菜硝酸盐污染影响的研究
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  硝酸
    AN EXPERIMENTAL STUDY ON BIO-DISC' S REMOVING NITRATE AND CARBONACEOUS ORGANIC MATERIAL IN WASTEWATER
    生物转盘去除废水中硝酸氮和含碳有机物的试验研究
短句来源
    Study on Electrolytic Process for the Treatment of Wastewater Containing Copper Nitrate.
    电解法处理硝酸铜废水研究
短句来源
    The support was impregnated in cupric nitrate solution for two times for(4~6)h and calcined at 450 ℃ for 3 h. COD removal of 66.5% and chroma removal of 97% were obtained over the catalyst in treatment of acidic black dye wastewater.
    该载体在浓度较高的硝酸铜溶液中浸渍2次,每次浸渍(4~6)h,在焙烧温度450℃和焙烧3h的条件下,所制备的催化剂处理酸性黑染料废水,COD去除率均>66.5%,色度去除率>97%。
短句来源
    The influence factors of starch grafting acrylonitrile on the grafting ratio and the grafting efficiency were researched and obtained the optimum process conditions as follows:the mass proportion of dissoluble starch to acrylonitrile is 1∶3,the concentration of ceric ammonium nitrate is 6 mg/L,grafting temperature is 35 ℃,grafting time is 2 h,under the condition,the grafting rate and grafting efficiency are 172%,92% respectively.
    研究了淀粉接枝丙烯腈的各种因素对接枝率和接枝效率的影响。 结果表明,接枝改性淀粉絮凝剂的最佳工艺条件:可溶性淀粉与丙烯腈的质量比为1∶3,硝酸铈铵的浓度为6 mg/L,接枝温度为35℃,接枝时间为2 h。
短句来源
    Studies on acute toxicity and sperm quality effect upon male mice from samarium nitrate
    硝酸钐对雄性小鼠的急性毒性及精子质量的影响
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  硝酸根
    Determination of Nitrate and other Inorganic Anions in Food by Ion Chromatography
    离子色谱法测定食品中的硝酸根和其他无机阴离子
短句来源
    The influence of nitrate and Suwannee River fulvic acid to the photodegradation of Bisphenol A under the UV irradiation(λ>280nm) has been studied in this paper.
    研究了,双酚A在大于280nm的光照下,硝酸根和Suwannee富里酸对其光解的影响。
    The impact on microbial transformation of selenate by nitrate
    硝酸根对硒酸盐微生物转化的影响
短句来源
    Advance in studies of catalytic reduction of nitrate in drinking water
    饮用水中硝酸根的催化还原研究进展
短句来源
    Automated Simultaneous Determination of Nitrate and Nitrite in Environmental Water by Sequential Injection Spectrophotometry
    顺序注射分光光度法同时测定环境水样中硝酸根和亚硝酸根
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  “nitrate”译为未确定词的双语例句
    Nitrate (NO-3-N) fell rapidly at the first several days of immerging, which was from more than 10 mg·L-1 to under 2 mg·L-1. Ammonia nitrogen (NH+4-N) kept at a low level (<1.3 mg·L-1).
    L-1以上迅速下降至2mg. L-1以下,铵态氮(NH4+-N)则始终低于1.3mg.
短句来源
    Under the condition,the system has the removal rates for TN,ammonia nitrogen,nitrate nitrogen,nitrite nitrogen,TP,phosphatic phosphor,chl a were 89.85%,88.69%,82.64%,77.73%,90.65% and 67.11%respectively. Removal rate for organic pollutant reached to 54.92%.
    系统对TN、NH4+-N、NO3--N、NO2--N、TP、PO4--P的去除率最高可分别达89.85%、88.69%、82.64%、77.73%、90.65%、67.11%,对总有机物污染物的去除率可以达到54.92%。
短句来源
    However,in the downstream of the Xiangxi River and the river mouth,significant negative correlations were observed between phytoplankton abundance and nitrate(Spearman,p<0.01, n=21),phosphate(Spearman,p<0.05,n=21) and silicate(Spearman,p<0.01,n=21) in the rainy season.
    在2004年7~8月(雨季)香溪河下游及河口区浮游植物生物量与主要营养盐(NO3-N,PO4-P,SiO3-Si)的浓度呈显著负相关(Spearman,p<0.01,p<0.05,p<0.01,n=21);
短句来源
    In the dry season,the similar correlations were also observed with nitrate(Spearman,p<0.05,n=28) and silicate(Spearman,p<0.01,n=28),but not with phosphate.
    在2005年4月(旱季)该河段藻类密度与主要营养盐(NO3-N-N,SiO3-Si)呈显著负相关(Spearman,p<0.05,p<0.01,n=28),但与PO4-P无显著的相关性。
短句来源
    An A/O/O biofilm process was studied for the treatment of Nylon-6 wastewater,and influence factors like nitrate recirculation ratio,HRT(Hydraulic retention time),DO as well as the influent COD and TN were investigated.
    试验采用A/O/O生物膜系统对锦纶废水进行处理,考察了硝化液回流比、水力停留时间、DO和进水COD及TN浓度对系统处理效果的影响。
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  nitrate
Study on eruption of heat for Escherichia coli B aroused by lanthanum nitrate and its mechanism
      
Biological effect of rare-earth lanthanum nitrate on the growth of Escherichia coli B was studied using the calorimetric method.
      
There were exceptional changes on the growth thermogenic curves for high concentrations of lanthanum nitrate.
      
When the concentration of lanthanum nitrate was at 300 mg/L and 500 mg/L, and Q of the cultures reached 3.89 and 2.54 times of normal cultures, respectively.
      
Nanometer MgO was prepared via a sol-gel auto-combustion technique using magnesium nitrate as raw material and citric acid as chelating agent.
      
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The solution of hydrazine can reduce many rnetallic salts into metalsin the form of powder or non-uniform deposits on a base plate. This paper first gives a fairly detailed treatment on the thermodyna-mics of hydrazine reduction and then describes the expriments of reducingsilver-cantaining slurry or silver-nitrate solution in a certain range of pHvalue into metallic powder or spong. The various conditions, such as hydra-zine concentration, pH value, silver concentration, mode of stirring, time oftreatment,...

The solution of hydrazine can reduce many rnetallic salts into metalsin the form of powder or non-uniform deposits on a base plate. This paper first gives a fairly detailed treatment on the thermodyna-mics of hydrazine reduction and then describes the expriments of reducingsilver-cantaining slurry or silver-nitrate solution in a certain range of pHvalue into metallic powder or spong. The various conditions, such as hydra-zine concentration, pH value, silver concentration, mode of stirring, time oftreatment, ect., of the efficiency of reduction are discussed. The main characteristics of the silver powder obtained from silver saltsby hydrazine reduction are: fine grain size, multitudinous grain shape, andhigh purity. It is an ideal material for making various silver electric cont-racts. The method used in the expriment possesses a series of advantages:straight-forward flowsheet, simple equipment, easy operation, suitability foreither large or small scale production, low cost of preparation, and highefficiency of production. The present method may be considered now as anew technique for making silver powder in metal powder industry.

本文首先探讨了联氨还原的热力学,然后叙述在水溶液中用联氨使氯化银浆料或硝酸银水溶液在一定的pH范围内还原成银粉或海绵银的试验情况。讨论了各种因素——联氨浓度、pH值、银浓度、搅拌方式、还原时间等对银还原率的影响。用联氨水溶液还原银盐所制得银粉的主要特性是:颗粒细,粒形复杂,纯度高。它是制造各类银系列电触头的理想材料。本实验所用方法具有流程短、设备简单、操作容易、生产率高、生产规模可大可小、成本低等优点,是目前制取粉末冶金用纯银粉的一种新方法。

This paper studies the method of determining trace chloride in high purity power station waters, in which lead phosphate is used as load body for coprecipirating concentrated chloride. After speed centrifugation, the precipitate is dissolved with iron (Ⅲ) nitrate perchloric acid and the mercury (Ⅱ) thiocyanate-methanol solution is added, and then spectrophotometric determination is undertaken. In this paper, the principles and analytical conditions of this method are provided. The sensitivity of this method...

This paper studies the method of determining trace chloride in high purity power station waters, in which lead phosphate is used as load body for coprecipirating concentrated chloride. After speed centrifugation, the precipitate is dissolved with iron (Ⅲ) nitrate perchloric acid and the mercury (Ⅱ) thiocyanate-methanol solution is added, and then spectrophotometric determination is undertaken. In this paper, the principles and analytical conditions of this method are provided. The sensitivity of this method is 0.0026 absorbance/ppb cl~-, the concentration of detection limit is 2 ppbcl~-. When chloride concentrations are 5 ppb and 10 ppb, the standard deviations of six analytical results are 0.003 and 0.002 (absorbance unit) respectively. The recoveries of determing demineralized water samples are 88-98%. The apparatus used in this method are simple and the analytical procedures are convenient. The experiments verify that this method is of practical significance for determining trace chloride in high-purity waters of power station.

本文研究以磷酸铅盐作为载体共沉淀富集氯离子,高速离心分离后,用硝酸铁—高氯酸溶液溶解沉淀,加硫氰酸汞—甲醇溶液分光测定火力发电厂高纯水中痕量氯离子的方法。文中论述了本方法的原理和分析条件。方法的灵敏度为0.0026/PPbCl~-;检测限浓度为2PPbCl~-。氯离子浓度为5PPb和10PPb时,六次分析结果的标准偏差分别为0.003和0.002(吸光度单位)。测定除盐水样的回收率为88~98%。本方法所用仪器简单,分析手续方便。实验证明;本方法对于测定火力发电厂高纯水中痕量氯离子具有实用价值。

This paper depicts a method for simultaneous electrodeposition offive actinides.In an electrolyte system of 8ml oxalic acid-nitric acid(contai-ning 20mg sodium nitrate),1:6 ammonium hydroxide is added to adjustthe pH to 1—2.A platinum rod(φ2)is used as the anode,stainless steeldisk as the cathode.The distance between electrodes is 4mm,current dencityof the cathode 630-700mA/cm~2,electrodeposition time 90 minutes.A mixture(or in single)of trace amount of ~(233)U,~(237)Np,~(239)Pu,~(241)Am,and ~(242)Cmcan...

This paper depicts a method for simultaneous electrodeposition offive actinides.In an electrolyte system of 8ml oxalic acid-nitric acid(contai-ning 20mg sodium nitrate),1:6 ammonium hydroxide is added to adjustthe pH to 1—2.A platinum rod(φ2)is used as the anode,stainless steeldisk as the cathode.The distance between electrodes is 4mm,current dencityof the cathode 630-700mA/cm~2,electrodeposition time 90 minutes.A mixture(or in single)of trace amount of ~(233)U,~(237)Np,~(239)Pu,~(241)Am,and ~(242)Cmcan be simutaneously eletrodeposited on a stainless steel disk.The recovery ofelectrodeposition is 99% with a precision of±1%.The deposited layer is firmand bright.The resolution is 34keV for ~(241)Am with Si(Au)surface barrierα spectrometer.The interference of Fe~(3+),Al~(3+),Ca~(2+),and Mg~(2+)to the ele-ctrodeposition has been investigated as well.

本文叙述了五种锕系核素同时电沉积的方法。本方法采用8ml 草酸-硝酸(含有20mg 硝酸钠)的电解液体系,加入1∶6氨水,调节 pH 值为1—2。以铂棒(φ2mm)作阳极,不锈钢片作阴极,电极间距为4mm,阴极电流密度为630—700mA/cm~2,电沉积90min。~(233)u、~(237)Np、~(239)Pu、~(241)Am 和~(242)Cm 的痕量混合物(或单个)同时电沉积,电沉积回收率为99%;精密度为±1%;镀层牢固。在Si(Au)面垒α谱仪上测得的分辨率,对~(241)Am 是34keV。并研究了 Fe~(3+)、Al~(3+)、Ca~(2+)、Mg~(2+)对电沉积的干扰。

 
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