查询词典 cadmium

This paper takes conchocelis of Porphyra yezoensis as experiment material, analyzes the toxicity of heavy metal ions on 6 parameters of chlorophyll a content, soluble protein content, mannite content, peroxidase activity, malonaldehyde content and the growth of conchocelis. In experimental conditions, samples were exposed to mercuryHg~(2+, copperCu~(2+, cadmium Cd~(2+, plumbumPb~(2+ and zincZn~(2+ at different concentrations and were taken after exposure for different hours.

本文以条斑紫菜丝状体为实验材料，测定条斑紫菜丝状体中叶绿素a含量、可溶性蛋白含量、甘露醇含量、过氧化物酶活性、丙二醛含量及藻体生长情况6项生理生化指标，研究分析了不同处理浓度和不同培养时间下重金属离子Hg~(2+)、Cu~(2+)、Cd~(2+)、Pb~(2+)、Zn~(2+)对条斑紫菜丝状体的毒性效应。

Results The contamination of arsenic and mercuric have basic controlled, but the lead and cadmium contamination seriously.

结果 我国食品中砷、汞污染状况已基本得到控制，但铅、镉的污染突出。

Three-electrode system to sodium acetate - acetic acid, potassium chloride and mercury chloride solution to end solution, by stripping square wave voltammetry method for the determination of trace sewage cadmium.

采用三电极工作系统，以醋酸钠—醋酸，氯化钾和氯化汞溶液为底液，用方波溶出伏安法测定了污水中的微量镉。

It also classifies them in accordance with the compound method of triazene reagents as follows: reagents diazotizated with sodium nitrite and muriatic acid, reagents diazotizated with nitrosyl positive ion, reagents diazotizated with n-butyrate nitrite.These reagents with high sensitivity and good choice have been widely applied to the determination of microa mounts of cadmium and...

按三氮烯类试剂合成的方法进行分类，分别为在亚硝酸钠和盐酸作用下重氮化的试剂，在亚硝酰正离子作用下重氮化的试剂，在亚硝酸正丁脂作用下重氮化的试剂，此类试剂灵敏度高，选择性好，广泛应用于被镉、汞等过渡金属离子污染的环境样品的分析中。

Cadmium ; peroxidation ; nonprotein thiols ; acid-labile sulfide ; oilseed rape

镉； 过氧化作用；非蛋白巯基；酸不稳定性硫；油菜

Cadmium has the ability to absorb neutrons, so it is used as a barrier to control nuclear fission.

镉有吸收中子的能力，所以它被用作防止核裂变的屏障。

（1）Cadmium can enter embryo by permeating placenta barrier and enter brain partly and oosperm can not develop as embryo in the high dose group.（2）The decreasing of some neural transmitter and capacity of anti-oxidation are related to the content and contribution of zinc in embryoes.

（1）镉可透过胎盘屏障和部分透过血脑屏障，高镉可致受精卵不能发育为胚胎；（2）母鼠染镉可致胎鼠脑组织5-HT合成减少，抗氧化能力减弱；这些改变与锌的含量和分布改变有关。

According to the investigation on the local situation of aquatic vegetation in Littoral Regions of Gonghu Lake and Meiliang Bay of the Wuxi Taihu Lake, the species of aquatic vegetation, community forms and biomass were acquired. Then a contrast of vegetation distribution characteristic between the two Littoral Regions was analyzed which induced to the analysis of impact factors. In the treatments designed as varying degree oxidation intimidate, the heavy metal cadmium and the ammonia nitrogen single and compound poisons, the COD sewage cultivate, the plant growth opsonin processes, the effect of the intimidate environment on the submerged plant growth and the physiological biochemistry characteristic was analyzed. The effective method to improve the resist adversity of submerged macrophyte was discussed. The results will give a suggestion to the restoration of the submerged macrophyte, the efficiency and reconstruction in Lake Ecosystem.

通过对无锡太湖两重要湖湾贡湖和梅梁湖湖滨带沿岸浅水区水生植被现状进行调查，了解了水生植物的种类、群落组成及生物量，对两湖湾湖滨带沿岸浅水区水生植被分布特征进行了对比，并进行了影响因素分析；通过不同程度的氧化胁迫、重金属镉与氨态氮单一和复合作用、高COD生活污水胁迫培养、植物生长调节素处理，分析胁迫环境和壳聚糖各自对沉水植物生长的影响及作用机理，探讨提高沉水植物逆境抗性的有效措施；探寻沉水植物修复的理论依据和有效途径，为急待进行水生植被恢复的湖泊提供依据和建议。

Methods Tissue inorganic nitrate,malonaldehyde and NOS activity of the heart,liver,brain and kidney were determinated respectively by Cu2+-activated cadmium-reduction method,thiobarbituric acid test and oxyhemoglobin oxidation method.

采用铜离子活化镉还原法、硫代巴比妥酸染色法和血红蛋白氧化法测定组织NO、丙二醛含量和NOS的活性。

And solve ordinary paper flower excessive amount of lead and cadmium solubilization problems.

而且彻底解决了普通花纸铅镉溶量超标的问题。

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。