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铜暴露
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  “铜暴露”译为未确定词的双语例句
     1. Effects of copper on A-type potassium currents (I_A) in acutely dissociated rathippocampal CA1 neuronsExtracellular application of various concentrations of Cu~(2+)(1-1000 μM) reversibly reduced the amplitude of I_a in a dose-dependent manner with an IC_(50) value of 130 μM.
     1.急性铜暴露对大鼠海马CA1区神经元A-型钾电流的影响 胞外1,10,30,100和1000μM Cu~(2+)以剂量依赖性的方式可逆地抑制I_A的幅度,其IC_(50)值为130μM。
短句来源
     But the serum zinc was significantly decreased in animals exposed for 200 hours, and the serum copper of the animals exposed for 300, 400 and 500 hours was significantly increased and the serum copper/zinc ratio of the animals exposed for 200, 300, 400 and 500 hours was significantly increased.
     而血清锌暴露200小时则显著降低,血清铜暴露300、400和500小时显著增高,铜/锌比值在200、300、400和500小时显著增高。
短句来源
     6. Copperinduced MT-2A transcription demonstrated by a concentration-dependent increase inMT-2A mRNA levels in copper treated cells.
     总之,铜暴露可引起Caco-2 细胞活性和细胞增殖能力下降,可导致细胞单层通透性增加和分化细胞刷状缘膜面 P-糖蛋白(P-gp)活性下降,从而引起细胞单层屏障功能下降,铜可诱导细胞 MT-2A 基因转录,增加 MT 表达,参与铜解毒和吸收调节?
短句来源
     For healthy humans who are not occupationallyexposed the major route of exposure to copper is oral.
     对于健康非职业性铜暴露人群,经口摄入是铜的主要摄入途径?
短句来源
     Detection of DNA Damage in Earthworm(Eisenia foetida)in Vivo Exposure to Copper Ion
     铜暴露下赤子爱胜蚓(Eisenia foetida)活体基因的损伤研究
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  相似匹配句对
     COPPER
    
短句来源
     Within the layer the copper?
     ?
短句来源
     Human Exposures to Copper in Tianjin Area
     天津地区人群对(Cu)的暴露水平
短句来源
     Binding of copper on fish gills during short-term exposure
     短期暴露实验中在鱼鳃表面的结合状态
短句来源
     Human Exposure Assessment of Organotin
     有机锡的人体暴露分析
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  copper exposure
Copper exposure from fertilization or the prism stage retarded development and growth and led to abnormalities in the morphology of the embryos and larvae.
      
Effect of the low level of copper exposure on nonenzymatic antioxidants was studied in a freshwater fish Channa punctatus (Bloch.).
      
Copper exposure had no significant effect on the ascorbic acid level and induced no lipid peroxidation over control values.
      
Copper exposure reduced haemolymph sodium concentration by 40% and gill Na,K-ATPase activity by 50 to 60% after 1 wk.
      
Copper exposure had no apparent effect on tissue cytochrome c oxidase activity.
      
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There were no apparent effects observed on the serum sodium, potassium, calcium and magnesium of rats and rabbits exposed to 50 Hz 40 kV/m electric field for 100 to 500 hours. But the serum zinc was significantly decreased in animals exposed for 200 hours, and the serum copper of the animals exposed for 300, 400 and 500 hours was significantly increased and the serum copper/zinc ratio of the animals exposed for 200, 300, 400 and 500 hours was significantly increased. From the above it may be suggested that copper/zinc...

There were no apparent effects observed on the serum sodium, potassium, calcium and magnesium of rats and rabbits exposed to 50 Hz 40 kV/m electric field for 100 to 500 hours. But the serum zinc was significantly decreased in animals exposed for 200 hours, and the serum copper of the animals exposed for 300, 400 and 500 hours was significantly increased and the serum copper/zinc ratio of the animals exposed for 200, 300, 400 and 500 hours was significantly increased. From the above it may be suggested that copper/zinc ratio be a sensitive index which reflects the effects of industrial frequency electric fields on exposed biological bodies.

大鼠和家兔暴露于50Hz、40kV/m电场中100~500小时,血清钠,钾、钙和镁无明显变化;而血清锌暴露200小时则显著降低,血清铜暴露300、400和500小时显著增高,铜/锌比值在200、300、400和500小时显著增高。结果提示血清铜/锌比值是反映工频电场对机体作用的敏感指标。

Concentrations of free copper and mucus and other parameters including pH and alkalinity of the gill microenvironment of Cyprinus carpio exposed to copper of various levels were determined using Playle's apparatus.MINEQA2 was applied to calculate the copper speciation and singlesite complexation model was employed for characterizing the complexation capacity of gill mucus for copper.A procedure of trial and error with the two approaches involved was developed for the speciation calculation.It was shown that...

Concentrations of free copper and mucus and other parameters including pH and alkalinity of the gill microenvironment of Cyprinus carpio exposed to copper of various levels were determined using Playle's apparatus.MINEQA2 was applied to calculate the copper speciation and singlesite complexation model was employed for characterizing the complexation capacity of gill mucus for copper.A procedure of trial and error with the two approaches involved was developed for the speciation calculation.It was shown that excretion of mucus was positively correlated to the total copper level in water.It was found that in the gill microenvironment,both pH and alkaline are higher than that in the bulk water,causing the difference in copper speciation.From 3 to 20% of copper in the microenvironment was mucus complexed.

利用 Playle设计的装置测定了不同铜暴露水平下鲤鱼鳃部进出水中的游离铜离子浓度、粘液含量及有关参数 .用MINTEQA2和单配位体模型联合的试算方法计算了不同形态铜含量以及鳃部粘液对铜的络合能力 .结果表明 ,利用该算法可以获得鱼鳃微环境金属形态分布的准确结果 ,同时可以得到与鱼鳃粘液络合能力有关的参数 .随着暴露铜含量增加 ,粘液分泌量随之增加 ,鱼鳃微环境 p H和碱度也有所上升 .鱼鳃粘液的络合当量浓度 ( Cu/ C)和稳定常数 (对数 )分别为 0 .95mmol/ mg和5.32 .就铜形态分布而言 ,鱼鳃微环境与外部水相的主要差别表现在相对较高的羟基络合态铜含量以及占总量 3%~ 2 0 %的鱼鳃粘液络合态铜 .

The copper uptake by neon tetras exposed to copper complexed with EDTA, diaminoethane, oxalic acid, and tartaric acid was investigated. It was demonstrated that at constant concentration of free copper, the amount of copper taken by the fish increased with the increase in concentration of the complexed copper, indicating that the copper complexes are available for fish uptake but at a relatively low speed. For the complexes studied, the lower the conditional stability constant showed the faster absorption of...

The copper uptake by neon tetras exposed to copper complexed with EDTA, diaminoethane, oxalic acid, and tartaric acid was investigated. It was demonstrated that at constant concentration of free copper, the amount of copper taken by the fish increased with the increase in concentration of the complexed copper, indicating that the copper complexes are available for fish uptake but at a relatively low speed. For the complexes studied, the lower the conditional stability constant showed the faster absorption of copper by fish.

通过暴露实验和化学形态计算方法研究了彩虹方头鱼(Paracheirodoninnesi)对四种铜络合物的吸收.结果表明,络合态铜可被彩虹方头鱼吸收,但对络合态铜的吸收率显著低于对非络合态铜的吸收率,在其它形态铜含量基本恒定的条件下,铜吸收量随络合态铜含量的增加而呈线性增加趋势.不同络合态铜的有效性也有显著差别,条件稳定常数越高,则越不容易被吸收.由于铜暴露导致的粘液分泌量的变化从另一侧面证实了络合态铜的可吸收性.

 
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