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锌和铅
相关语句
  zinc and lead
    The ferrous oxide and carbon make slag foaming, and zinc and lead enter the secondary dust after reduction.
    压块加入后,压块中的铁和碳通过反应参与了泡沫渣的生成; 压块中的锌和铅被快速还原,进入二次粉尘。
短句来源
    Toxic effect of heavy metal ions such as copper,cadmium,zinc and lead on phenol degradation using yeast(Pityrosporum sp.)
    研究了铜、镉、锌和铅对酵母 (Pityrosporumsp .)
短句来源
    Instead of inhibition,zinc and lead can promote the yeast's growth and phenol degradation in a low initial concentration,and their stimulations decrease with the increase of their concentrations.
    而锌和铅在低浓度时 ,对酵母降解苯酚过程中菌体生物量以及苯酚的降解均有促进作用 ,其促进作用随着金属离子浓度的增加而减弱 .
短句来源
  zn and pb
    After taken up by Chinese Milkvetch, Cu2+、Zn2+、Pb2+ were distributed mainly in root with Cu content markedly higher than that of Zn and Pb, Zn content highest in leaf and stem, Cu content lowest in legumen.
    土壤中铜、锌、铅被紫云英吸收后主要分布于紫云英根部; 根中铜含量明显高于锌和铅,茎、叶中锌含量最高,果中铜含量最低.
短句来源
    It was indicated that the former can digest Cu,Ni and Mn in the soil completely,and the latter can digest Zn and Pb completely and respectively.
    对硝酸-氢氟酸-高氯酸体系消解液和硝酸-盐酸-过氧化氢体系消解液进行消解对比试验,发现前者将土壤样品中的铜、镍和锰完全消解,后者能将样品中的锌和铅消解完全。
短句来源
  “锌和铅”译为未确定词的双语例句
    The Haknson's Ecological Risk Index Method is briefly introduced and applied to assess the potential ecological risk of the river mouths around Bohai Bay. The concentrations of mercury,copper,zinc,lead and arsenic in 19 sediment samples collected from river mouths are analyzed.
    简要介绍了Hak nson的生态风险指数法 ,并用该法对环渤海湾诸河口采集的 19处底泥样品分析了汞、砷、铜、锌和铅对水域的污染程度及其对水域造成的潜在生态风险影响。
短句来源
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  zinc and lead
Although the reaction of α,α-dibromo-α-fluorotoluene with zinc and lead involves formation of fluoro(phenyl)carbene, this procedure is not suitable for the synthesis of 2-fluoro-2-phenylaziridines.
      
The Use of the Mortality Rate of Marine Fish Prelarvae for the Estimation of Zinc and Lead Toxicity
      
According to the results of model experiments with artificial contamination of soil, the flux of zinc and lead from the starting point (from a medium loamy leached chernozem) to the final point (wheat grains) sharply decreases.
      
The adsorption of zinc and lead on hair was dependent on the acidity of the hair and/or the medium in which the hair sample was immersed, suggesting that hair is an ion exchanger.
      
Age- and sex-related differences in zinc and lead levels in human hair
      
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  zn and pb
Observations of Au, Ag, Zn and Pb in crude oils from basins in geographic proximity to ore deposits
      
The Zn and Pb enrichment was more evident in oligotrophic alpine lakes than in more productive forest lakes and was independent of lake water or sediment pH.
      
While the Cd pollution in BL was greater than that in TL, there were not many differences in the average loads of Cu, Zn and Pb.
      
The exchangeable/carbonate fractions of Cu, Fe, Ni, Zn and Pb are lower.
      
In this paper, the contents and various forms of Cd, Cu, Zn and Pb in the sediments of the Xiangjiang River have been investigated.
      
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The method of removal Cd(Ⅱ) from wastewater using chitosan with electrolysis of Na 2SO 4 as flocculants was described.The effects of pH, ion concentration of Cd(Ⅱ), concentration of chitosan as a flocculants on the removal rate of Cd(Ⅱ) were investigated respectively. When the ion concentration of Cd(Ⅱ) is not more than 40?mg/L, pH is 8~8.5 and the concentration of chitosan is 1%, the removal rate of Cd(Ⅱ) is higher than 99 95%. At the same condition the removal rate of Cd(Ⅱ) in waste water from a smelter...

The method of removal Cd(Ⅱ) from wastewater using chitosan with electrolysis of Na 2SO 4 as flocculants was described.The effects of pH, ion concentration of Cd(Ⅱ), concentration of chitosan as a flocculants on the removal rate of Cd(Ⅱ) were investigated respectively. When the ion concentration of Cd(Ⅱ) is not more than 40?mg/L, pH is 8~8.5 and the concentration of chitosan is 1%, the removal rate of Cd(Ⅱ) is higher than 99 95%. At the same condition the removal rate of Cd(Ⅱ) in waste water from a smelter is higher than 99 7%, the remainder ion concentrations of the other ions of Cu, Zn, and Pb in the wastewater are 0 053, 0.58 and 0 01?mg/L, which are less than the drainage standard fixed by P.R.China.The flocculation mechanism of chitosan to Cd(Ⅱ) was analyzed also.

报道了用脱乙酰基壳聚糖为絮凝剂 ,在电解质Na2 SO4 的作用下絮凝除镉的方法·考察了酸度、离子浓度、壳聚糖用量对去除率的影响·当水样含镉质量浓度不大于 40mg/L ,pH =8~9和壳聚糖的含量为 1%时 ,镉的去除率达到 99 95 %以上·在同样的条件下处理冶炼厂的含镉废水 ,除镉率达到 99 7%以上 ,其他金属离子铜、锌和铅的残余质量浓度分别为 0 0 5 3 ,0 5 8,0 0 1mg/L ,低于国家排放标准·还探讨了壳聚糖絮凝除镉机理

The Haknson's Ecological Risk Index Method is briefly introduced and applied to assess the potential ecological risk of the river mouths around Bohai Bay.The concentrations of mercury,copper,zinc,lead and arsenic in 19 sediment samples collected from river mouths are analyzed.It is concluded that the degree of contamination and the potential ecological risk of the river mouths are low except that those of Haihe River mouth are moderate.The pollutants in the order of impacting extent of ecological risk are:Hg>As>Cu>Pb>Zn....

The Haknson's Ecological Risk Index Method is briefly introduced and applied to assess the potential ecological risk of the river mouths around Bohai Bay.The concentrations of mercury,copper,zinc,lead and arsenic in 19 sediment samples collected from river mouths are analyzed.It is concluded that the degree of contamination and the potential ecological risk of the river mouths are low except that those of Haihe River mouth are moderate.The pollutants in the order of impacting extent of ecological risk are:Hg>As>Cu>Pb>Zn.

简要介绍了Hak nson的生态风险指数法 ,并用该法对环渤海湾诸河口采集的 19处底泥样品分析了汞、砷、铜、锌和铅对水域的污染程度及其对水域造成的潜在生态风险影响。结果表明 ,除海河口污染程度和潜在生态风险略高外 ,环渤海湾其他河口重金属及砷污染程度及其对水域造成的潜在生态风险较低。从环渤海湾诸河口总的污染程度看 ,各污染物对生态风险影响程度从大到小的顺序为 :Hg >As >Cu >Pb >Zn。

Changes of growth morphology, heavy metals accumulation amount and cell ultrastructure of root leaf and fruit of Chinese Milkvetch in Cu2+、Zn2+、Pb2+ heavy metal ions polluted paddy soil near Fuyang copper smelter of Zhejiang Province were studied using pot-cultivation test, so as to ascertain the toxic damage of heavy metal pollution of farmland near the smelter on the winter green manure crops. Heavy metals pollution of the tested soil could cause shoot growth show, root few thin and small, root nodule growth...

Changes of growth morphology, heavy metals accumulation amount and cell ultrastructure of root leaf and fruit of Chinese Milkvetch in Cu2+、Zn2+、Pb2+ heavy metal ions polluted paddy soil near Fuyang copper smelter of Zhejiang Province were studied using pot-cultivation test, so as to ascertain the toxic damage of heavy metal pollution of farmland near the smelter on the winter green manure crops. Heavy metals pollution of the tested soil could cause shoot growth show, root few thin and small, root nodule growth inhibited, above-ground branch short and reduced, leaf yellow and flower deferred. After taken up by Chinese Milkvetch, Cu2+、Zn2+、Pb2+ were distributed mainly in root with Cu content markedly higher than that of Zn and Pb, Zn content highest in leaf and stem, Cu content lowest in legumen. The results of observation through TEM showed that the toxic damage from heavy metals pollution of the tested soil was mainly the ultrastructure of the organelle (chloroplast, mitochondria and cell nucleus), causing expansion of chloroplast. Outer membrane structure disappeared, thylakoid blurred, hollowing with big lipid appeared inside the cavity; mitochondria deformed, cristae swelled or disappeared, outside membrane disintegrated; cell nucleolus bursted in membrane, nucleolus swelled or disappeared and agglutinated with chromatin together. Each located cell of Chinese Milkvetch in the polluted soil sample was damaged in the order root>leaf>stem.

为探明铜冶炼厂附近农田重金属污染对冬季绿肥作物的毒害作用,通过盆栽试验,研究了浙江富阳铜冶炼厂附近的铜、锌、铅等重金属离子混合污染的水稻土上,紫云英的生长,根、茎、叶、果各部位重金属积累量和细胞超微结构的变化.结果表明,在供试土壤重金属混合污染下,紫云英根系生长缓慢,主根细小、侧根稀少,根瘤生长受抑制;地上部分枝减少,长势矮小,叶片黄化,花期推迟.土壤中铜、锌、铅被紫云英吸收后主要分布于紫云英根部;根中铜含量明显高于锌和铅,茎、叶中锌含量最高,果中铜含量最低.透射电镜(TEM)观察结果表明,重金属混合污染主要毒害叶绿体、线粒体、细胞核等细胞器的超微结构,使叶绿体膨胀变形,基粒片层解体,外膜结构消失,类囊体模糊不清,腔内空泡化或形成大脂类;使线粒体变形、脊突膨胀或消失、外膜解体;使细胞核核膜破裂、核仁膨胀消失并与染色质凝集在一起.供试土壤重金属混合污染对紫云英各部位细胞的破坏程度为根>叶>茎.

 
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