查询词典 vanadium

Vanadium, a transition element, can compose multivalent vanadiumoxides with oxygen, which have been widely studied because of theirexcellent characters.

过渡金属钒可以和氧结合成多种价态的氧化物，各种钒的氧化物以其优良的性能成为国内外功能材料研究的热点，具有广阔的应用前景。

Air-segmented ; flow injection ; natural waters ; catalytically kinetic spectrophotometry ; vanadium

空气整段间隔；流动注射；催化动力学光度法；天然水；钒

In part one, the properties of catalysts such as iodine, platonic complex, transitional metal oxide and vanadium-containing heteropolyacid were studied in oleum and the process conditions were also analyzed.

催化剂开发中，制备了系列铂配合物催化剂和含钒杂多酸系列催化剂，并对制得的含钒杂多酸系列催化剂进行了XRD、IR、TG表征，确证了催化剂的组成、结构等，考察了催化剂中含钒量不同的催化剂其催化性能与含钒量的关系。

In China,the extracting vanadium from stone-coal on the circs of investigation and the craft status quo were summarized in this thesis,and the traditional craft and the new craft of oxygen pressure acid leaching were contrasted.

综述了我国石煤提钒的研究情况和工艺现状，对目前我国石煤提钒传统工艺和改进工艺进行了分析评述，并介绍了氧压直接酸浸出提钒新工艺，提出了我国石煤提钒工艺应有的发展方向。

Over the vanadium pentoxide catalyst the kinetics of oxidation of benzene is studied.

在所研制的催化剂上研究了苯氧化反应的动力学。

The experimental results are analyzed,phase transition principle and application in laser protection of vanadium pentoxide thin films are also introduced in this paper.

对实验结果进行了分析并介绍了V2O5薄膜的相变原理及其在激光防护上的应用。

Vanadium pentoxide and iron quality is better than similar national standards, long-term exports of European countries by users.

五氧化二钒及五零钒铁质量优于国家同类标准，长期出口欧洲各国，深受用户好评。

Effect of lithium intercalation on optical absorption of vanadium pentoxide thin films .

锂离子注入对V2O5薄膜光吸收的影响。

Extracting conditions such as temperature,the concentration of sulfuric acid are optimized.Test results show that leaching rate of vanadium pentoxide is up to 92% at the temperature of 90 ℃,with mass ratio of l...

实验结果表明，在MnO2用量3%、温度90℃、液固比2∶1、反应时间9 h、硫酸的浓度为20%、搅拌速度为1 500 r/m in的优化条件下，五氧化二钒浸出率为92%，比钠盐焙烧工艺高出10%以上，环境污染和能源消耗也得到有效控制。

Vanadium pentoxide is trading in a range of $6.25 to $7.25 per pound compared with $6.75 to $7.25 per pound two weeks ago.

五氧化二钒的价格也由两个星期前的6.75-7.25美元/磅，下降到目前的6.25-7.25美元/磅。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。