查询词典 tellurium

This dissertation deals with the synthetic method of benzotellurazoles containing various substituents in benzene nuclei: introducing tellurium atom to the acetanilide derivatives in ortho-position by direct or indirect ways, then reduced and cyclized to give substituted benzotellurazoles directly or indirectly.

本文系统研究了含各类取代基的苯并碲唑杂环的合成方法，即向原料中用四氯化碲以直接或间接定位的方法引入碲，再经过直接或间接还原关环法制备苯并碲唑。

A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable gray metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores.

有毒的非金属元素，有多种同素异形体，稳定且有金属特性的灰色同素异形体用于光电池，其在亮处的导电性比在暗处好，见于硫化物矿石中。注意，注意力集中

A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores as pyrite

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Selenium was discovered by him over one hundred years ago as an atomic element closely associated with sulfur and tellurium.

硒作为与硫和碲关系密切的元素在一百年前被他发现。

Any binary compound of tellurium with other more electropositive elements.

任何一种由碲和另一种正电性更强的元素组成的二元化合物。

A binary compound of tellurium.

钚发射危险的辐射物。

A binary compound of tellurium .

碲化物碲的二元化合物。。。

Thermodynamic analysis results show that tellurium can be leached by sulfuric acid leaching method from lead-rich tellurium slag.

并通过硫酸浸出高铅碲渣中碲的条件实验验证了热力学分析的结果。

Brief description is given to the test on the technology for comprehensively recovering gold and silver from tellurium-bearing slag: Tellurium-bearing slag is ground and leached with water to produce crud tellurium dioxide which is then purified through ion precipitation and complexing purification process; leaching reside is leached with chloride to produce copper and bismuth, bismuth oxychloride is recovered through neutralization and hydrolysis and sponge copper is recovered through cementation; gold and silver in the remaining residue can be recycled to the gold and silver smelting system for recovery.

文摘：简述了碲渣综合回收金银等的工艺试验：碲渣经磨矿水浸碲产出粗二氧化碲，用离子沉淀和络合净化法提纯；浸碲渣用氯盐浸出铜铋，中和水解回收氯氧铋，置换回收海绵铜；残留渣中的金银可返回金银冶炼系统回收。

To find out the causes for tellurium enrichments in deep-sea sediments,the authors analyzed and compared tellurium concentrations and helium isotope compositions in the magnetic parts and those in the bulk samples of deep-sea sediments.

为了查明深海沉积物中碲异常的原因，笔者对比分析了深海沉积物中磁性部分与全岩的碲含量和氦同位素组成。

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。