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nitrification
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  硝化
     EFFECTS OF CYANAMIDE NITROGEN ON THE INHIBITION OF NITRIFICATION AND ITS FIELD APPLICATION
     氰氨态氮的硝化抑制效应及其在农田的应用
短句来源
     Nitrification of Low Molecular Alkane and Production of Nitropropane
     低碳烷烃的硝化与硝基丙烷的生产
短句来源
     THEORY AND PRACTICE TO ENHANCE THE BIOLOGICAL NITRIFICATION OF WASTEWATER
     提高废水生物硝化效果的理论探讨及工艺对策
短句来源
     Dynamic Analysis of Nitrification and Denitrification by the Method of SBR
     SBR法硝化与反硝化动力学分析
短句来源
     On the simultaneous carbonaceous oxidation and biological nitrification of high ammonium wastewater
     高氨废水的碳氧化和生物硝化合并处理工艺研究
短句来源
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  硝化作用
     The test results show that under the conditions of DO = 2~3 mg/L, TOC = 200 mg/L, and C/N = 1∶1.5, there is less impact on nitrification;
     试验结果表明 ,DO为 2~ 3mg/L、有机物浓度 (TOC)为 2 0 0mg/L、C/N =1∶1.5时对硝化作用影响不大 ;
短句来源
     The experiments results show that MBZ at concentrations of 1,2 or 3 mg/L( the whole water concentration,the same below) , oxytetracyclinum at concentration of 1 mg/L,chloramphenicolum at concentrations of 1,2 or 3 mg/L,the mixture of CuSO 4 and FeSO 4 at (0.5+0.2) mg/L does not produce significant effects on nitrification of the system;
     结果表明 ,分别加入甲苯咪唑至 1、2、3mg/L(全水体质量浓度 ,其他同此 )、CuSO4+FeSO4合剂 (0 .5 +0 .2 )mg/L、土霉素 1mg/L、氯霉素 1、2、3mg/L均对生物滤器硝化作用无明显影响 ;
短句来源
     NH_4~+-N was adsorbed by topsoil, and then conversed to NO_3~--N by nitrobacteria under aerobic condition, NO_2~--N was removed by nitrobacteria too, and the nitrification of NH_4~+-N and NO_2~--N occurred in the depth of 0.5m.
     NO_2~--N也是由硝化作用转化成NO_3~--N而去除,并且NH_4~+-N和NO_2~--N的氧化都是在0.5m深度土壤柱内完成的;
短句来源
     The nitrification kinetics and dinitrification of biofilm on zeolites, carbon granules and sands were studied by determining the concentration of COD,NH+ 4-N,NO- 2-N and NO- 3-N.
     通过测定水中COD、NH+ 4 N、NO-2 N及NO-3 N的浓度变化 ,研究了淹没式废水处理装置中沸石、活性炭和沙粒 3种载体上硝化作用生物膜的动力学过程和反硝化作用 .
短句来源
     Irrigation prompts nitrification, and-NH4+-N turns to NO2--N and NO3--N swiftly, thus the concentration of NH4+-N in soil decreases.
     泡田加速了土壤中的硝化作用,NH_4~+-N迅速向NO_2~--N和NO_3~--N转化,降低了土壤中NH_4~+-N的浓度。
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  “nitrification”译为未确定词的双语例句
     Side-effects of organic and inorganic pollutants on soil nitrification and respiration
     Side-effects of organic and inorganic pollutants on soil nitrification and respiration
短句来源
     For nitrification,the temperature correction factors are θ_N=1.03(15~7℃) and θ_N=1.41(7~3℃).
     在硝化反应中温度系数θN=1.03(7~15℃),θN=1.41(3~7℃);
短句来源
     The kinetic constants for nitrification were obtained: u_m=0.05 h~(-1),K_(NO)=2.0 mg/L,Y=0.47 mg X/mg N and a=0.001 h~(-1) on the base of experiment.
     获得动力学参数um=0.05 h-1,KNO=2.0 mg/L,Y=0.47 mg X/mg N,a=0.001 h-1。
短句来源
     A Study of the Nitrification of PEEK by Using FTIR and ~(13)C-NMR Spectroscopies
     用FTIR及~(13)C-NMR法研究PEEK的硝化反应
短句来源
     furazolidonum at 1,2 or 3 mg/L,chloramphenicolum at 3 mg/L added repeatedly or TCCA at 2 mg/L can produce significant effects on nitrification.
     分别以呋喃唑酮 1、2、3mg/L、重复添加氯霉素至 3mg/L、重复或直接添加强氯精至 2mg/L都影响氨氮、亚硝酸氮的氧化
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  nitrification
Low levels of NO3- in these forest soils generally correspond to low net rates of nitrification.
      
Nitrification and denitrification in subalpine coniferous forests of different restoration stages in western Sichuan, China
      
Nitrification is the biological conversion of organic or inorganic nitrogen compounds from a reduced to a more oxidized state.
      
The results showed that forest restoration stage had no significant effects on gross nitrification rates or denitrification rates (One-way ANOVA (analysis of variance), p >amp;lt; 0.05).
      
There was no significant difference in the temperature coefficient (Q10) for gross nitrification rate among all the forest sites (One-way ANOVA, p >amp;lt; 0.05).
      
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The present paper reports studies on the relative rate of decomposition of nine different oil cake-meals [soybean, peanut, sesame, rape seed, cotton seed(with and without hull), chinese tallow seed (with and without hull)]. In the course of decomposition of the different oil cake-meals, freguent measurement were made of the quantity of evolved CO_2 gas, and amount of the NH_4~+, NO_3~-, and NO_2~- nitrogen formed at the given intervals of the day. These measurement served as indices of the intensity of decomposition...

The present paper reports studies on the relative rate of decomposition of nine different oil cake-meals [soybean, peanut, sesame, rape seed, cotton seed(with and without hull), chinese tallow seed (with and without hull)]. In the course of decomposition of the different oil cake-meals, freguent measurement were made of the quantity of evolved CO_2 gas, and amount of the NH_4~+, NO_3~-, and NO_2~- nitrogen formed at the given intervals of the day. These measurement served as indices of the intensity of decomposition and rate of ammonification and nitrification of the oil cake-meals that may be occur in the soil. These studies were performed in the laboratory, under room temperature condition of the summer season. All cakes were ground into meals to such particle size as to pass through a 20-mesh sieve. The cake-meals were separately mixed with cultivation soil in the proportion of one part of cake-meal to hundred parts by weight of soil. The soil used was of alluvial origin, low in organic matter and somewhat sandy in texture. It was found that decomposition of the cake-meals began soon after their application to the soil. The daily evolution of CO_2 reached its maximum for about one week. Immediately after that, the daily evolution of CO_2 declined rapidly to a such lower level and attained a rather steady declining rate after about two weeks. The trends were common in character irrespective of the kind of the cake-meals. Among the organic constituents of tile cake-meals that underwent into decomposition in the early days, nitrogeneous organic compou ads seemed to be of major importance. The production of ammonium compounds as a result of ammonification followed a trend similar to that shown by the evolution of CO_2. The maximum rate of ammonification was noticed sometime before the evolution of Co_2 had reached a maximum. The positive correlation existing between the total nitrogen content of the oil cakes and the rate of ammonification was evident. Other factors, however seemed to be also affecting the status of transformation of Nitrogen compounds. Nitrate compounds began to appear soon after ammonification had proceeded to an appreciable degree. In the course of decomposition their accumulation in the soil increased steadily with the time. Small amounts of nitrites were found under the experiment conditions which were characterized by low moisture content (25%) of the soil and meal mixtures. From the quantity of the total available nitrogen accumulated at different intervals in the course of decomposition as in the case here given, it seemed that some nitrogen might be lost through volatilization of ammonium compounds, since the soil was alkaline in reaction (the soil here used had a PH value of 7.2) Soaking the cake meals with water, lime-water, or straw-ash extract as sometimes practiced by the local farmers in some districts in Chekiang province brought about the effect of hastening ammonification and nitrification processes. But, gain in readiness of availability of the meals by this hastening effect might not compensate for the loss in total amount of available nitrogen formed. The loss was particularly evident when the cake-meals were pretreated with lime-water or straw-ash extract. It is believed that the alkaline reaction of the treated cake-meals accounts for this loss. The relative readiness of decomposition of the different oil cake-meals followed in descending order: soybean, sesame, peanut, Cotton seed (without hulls)>Cotton seed (with hulls), rape seed>Chinese tallow seed (with and without bulls). Similarly, the relative total amount of available nitrogen (including ammonium and nitrate nitrogen) formed during decomposition shows in the following order: soybean, peanut, sesame, chiness tallow seed(without hulls)>Cotton seed (with and without hulls)>rape seeds>Chiness tallow seed (with hlls).

研究了浙江省施用的九种主要餅肥在土壤中分解的情况,各种餅肥都經磨碎,并通过20孔篩。实驗証明,在夏天的温度下,餅肥施入土壤后即迅速分解,它的分解最盛时期是在一星期左右,此后即迅速下降,到二星期后,即漸趋穩定。餅肥施入土壤后,铵态氮的大量發生是在一星期以內,此后即迅速降低,轉化成硝酸态氮。硝酸态氮在一星期到二星期的时間内开始大量發生,到二星期后就漸趋穩定。土壤中有效态氮总量在各个形态轉化的过程中,有顯著的減少趋势。餅肥在施入土壤前用石灰、草灰或水处理一星期,可提早土壤中有效氮的發生,其中單用水处理的效果尤其好。实驗証明,用石灰或草灰处理餅肥,使有效态氮大量損失,而用水处理則沒有这种情况。在本实驗的条件下,各种餅肥的分解速率依次为:豆餅、芝麻餅、花生餅、棉仁餅>棉籽餅、生菜餅、熟菜餅>桕餅、青餅。各种餅肥中氮素化合物转化后所產生的有效态氮总量依次为:豆餅、花生餅、芝麻餅、青餅>棉仁餅、生菜餅、棉籽餅>熟菜餅>桕餅。

The microbiological characteristics of the red soils occurring on the hilly land of juxian,Jinhua,jiangshan,Anji and Yiwu Counties in Zhejiang province were summarized as following;1.pH,organic matter,and nitrogen in red soil tended to increase with the improvement of soil fertility.2.The abundance of soil microorganisms increased with the improvement of soil fertility.Among the microbial population,bacteria were the most abundant organisms in all soils.The number of bacteria was relatively higher in more fertile...

The microbiological characteristics of the red soils occurring on the hilly land of juxian,Jinhua,jiangshan,Anji and Yiwu Counties in Zhejiang province were summarized as following;1.pH,organic matter,and nitrogen in red soil tended to increase with the improvement of soil fertility.2.The abundance of soil microorganisms increased with the improvement of soil fertility.Among the microbial population,bacteria were the most abundant organisms in all soils.The number of bacteria was relatively higher in more fertile soils.The relative number of fungi decreased as cultivation went on,but it was always less than 5% in virgin soils.3.The respiratory capacity,measured with warburg apparatus,also increased with the improvement of soil fertility and both the release of CO2 and the absorption of O2 were less than 20 microlitres in virgin soils.4.During the first two weeks,the rate of nitrification of red soil increased with the improvement of soil fertility but in the later stage their differences were not significant.The nitrifying bacteria could hardly be propagated on virgin soils.The number of nitrifying bacteria was also positively correlated with soil fertility.5.The cellulose decomposing capacity of these soils,as measured by embedding cloth method,also showed positive correlation with soil fertility.In the case of virgin soils,the dry weight loss of the embedded cloth was not more than 13% at most.Among the cellulose decomposing population,bacteria(mostly Cytophaga and Cellvibrio)were the most abundant in cultivated red soils and there was no Cytophaga in virgin soils while Fusarium predominated in all soils.6.with the exception of virgin soils,the nitrogen fixing bacterium Clostridium pasteurianum could be found in all soil samples analyzed and with the most abundance.In general,a small number of Azotobacter Chroo- coccum could be found in most of the soils,while Beijerinck sp.was found 玱nly in some soils.7.As compared with the higher fertile red soil of Juxian,the chemical and microbiological characteristics of Jinhua,Jiangshan,Yiwu,Anji soils of different fertility stages showed that there is a need to improve the fertilities of these red soils.

综合衢县、金华、江山、义乌及安吉五个地点代表性低丘黄筋泥的微生物学分析,浙江省低丘红壤的微生物学特性主要有如下几点: 1.在红壤的一般理化性状中,土壤pH值、有机质及氮素含量随红壤熟化程度的提高而有增加的趋势。 2.红壤中微生物总数随土壤熟化度提高而增大。各级肥力的土壤,均以细菌占最大优势。往往熟化程度愈高,细菌数量所占的比重愈大。反之,不一定是熟化程度较高的土壤。熟化程度低的红壤,真菌的相对数量较高,但在荒地中,真菌的数量也不超过微生物总数的5%。 3.红壤荒地的呼吸强度,在本试验条件下,二氧化碳释放量及氧吸收量均在20微升以下。随着红壤熟化程度的增加,其数值也增大。 4.在培养初期二周内,红壤的硝化作用强度随熟化程度提高而增大。后期差异不一定显著。硝化细菌在荒地中几乎不能繁育,其数量随熟化程度提高而增加。 5.红壤的纤维素分解强度,在试验条件下,荒地中布片失重量最大不超过13%。分解强度及纤维素分解微生物相对数量,随红壤熟化程度提高而增加。纤维素分解微生物种类中,在熟化红壤以细菌占优势,在荒地则以霉菌占优势。在纤维素分解细菌中,熟化度高的红壤,以噬纤维菌属(Cytophaga)及纤维弧菌属(Cellvib...

综合衢县、金华、江山、义乌及安吉五个地点代表性低丘黄筋泥的微生物学分析,浙江省低丘红壤的微生物学特性主要有如下几点: 1.在红壤的一般理化性状中,土壤pH值、有机质及氮素含量随红壤熟化程度的提高而有增加的趋势。 2.红壤中微生物总数随土壤熟化度提高而增大。各级肥力的土壤,均以细菌占最大优势。往往熟化程度愈高,细菌数量所占的比重愈大。反之,不一定是熟化程度较高的土壤。熟化程度低的红壤,真菌的相对数量较高,但在荒地中,真菌的数量也不超过微生物总数的5%。 3.红壤荒地的呼吸强度,在本试验条件下,二氧化碳释放量及氧吸收量均在20微升以下。随着红壤熟化程度的增加,其数值也增大。 4.在培养初期二周内,红壤的硝化作用强度随熟化程度提高而增大。后期差异不一定显著。硝化细菌在荒地中几乎不能繁育,其数量随熟化程度提高而增加。 5.红壤的纤维素分解强度,在试验条件下,荒地中布片失重量最大不超过13%。分解强度及纤维素分解微生物相对数量,随红壤熟化程度提高而增加。纤维素分解微生物种类中,在熟化红壤以细菌占优势,在荒地则以霉菌占优势。在纤维素分解细菌中,熟化度高的红壤,以噬纤维菌属(Cytophaga)及纤维弧菌属(Cellvibrio)占优势。在荒地红壤中,没有发现噬纤维菌属。分解纤维素的霉菌

In the paper, two steps in the process of biochemical oxygen demand and the effects produced by nitrification are discussed. Then, a detailed introduction to various methods of inhibiting nitrification, including the methods of disinfectioa and chemical inhibition is given, of them, the most effective method is the addition of chemical agents of ammonium chloride and TCMP. The author proposes that the inhibition of nitrification must be considered as a regular step in B. O. D test, and that...

In the paper, two steps in the process of biochemical oxygen demand and the effects produced by nitrification are discussed. Then, a detailed introduction to various methods of inhibiting nitrification, including the methods of disinfectioa and chemical inhibition is given, of them, the most effective method is the addition of chemical agents of ammonium chloride and TCMP. The author proposes that the inhibition of nitrification must be considered as a regular step in B. O. D test, and that a unified national standard method of analysis must be established as soon as possible.

本文在论述生物化学需氧过程分两个阶段以及硝化作用产生的影响之后,具体介绍了抑制硝化作用的各种杀菌法和投加化学抑制剂法,并指明以投加氯化铵或TCMP较为有效。建议在有关废水及地面水的BOD测定中,把抑制硝化作为例行分析步骤。本文可以提供国家制定统一的测试标准作参考,也可供实际分析、监测人员选择采用。

 
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