氧化钒

The set includes: powerful ratcheting handle, comfortable grip, chrome vanadium steel keys with black oxide coating for hardness.

该套装包括：强大的棘轮手柄，舒适的抓地力，铬钒为黑色氧化膜硬度钢的关键。

In order to investigate the influence of membrane diffusivity on the charge-discharge performance of a single all vana- redox flow battery,the diffusion coefficients of VO~(2+) and VO_2~+ in two types of given ion exchange membrane s were measured with a specific designed permeation cell,the diffusion coefficients were about 10~(-9)～10~(-7) cm~2/s.

为了研究隔膜扩散特性对全钒氧化还原液流单电池充放电性能的影响，利用设计的渗透池实验测定了VO2+和VO2+在两种离子交换膜中的扩散系数，约为10-9~10-7cm2/s。

A kinetic spectrophotometric method for the determination of trace oxalate was established, based on its inhibitory effect on the catalytic oxidation of indigo carmine with potassium bromate in the presence of V in 5 mmol/L H3PO4 media.

基于在5mmol/L磷酸介质中，草酸根对钒催化溴酸钾氧化靛蓝胭脂红褪色反应的抑制作用，建立了一种阻抑动力学光度法测定微量草酸根的新方法。

A highly selective and stable ethanol sensor was designed based on the intrinsical layered structure of vanadium pentoxides and the advantages of nanobelts.

基于五氧化二钒晶体本身的层状结构特点和纳米带的特殊性，设计制备了具有较高选择性和稳定性的气敏传感器。

Moreover, the vanadium of oxidisable fraction in rhizosphere soils had best correlation with that in stem leaf and to root the acid soluble fraction was the best.

根际土中可氧化态钒与茎叶相关性最好，酸可溶态与根系相关性最好。

The method of the invention solves the problem that the vanadium ion is easy to be oxidated, the sintering temperature and the cost are reduced, and the charging and discharging performance and the circulation performance of the samples are improved.

本发明解决了钒离子容易氧化问题，降低了烧结温度，降低了成本，提高了样品的充放电性能和循环性能。

The SBA-15-supported vanadium oxide catalyst has the highest selectivity for propylene because of its larger pore diameter and higher surface area.

SBA-15负载钒氧化物催化剂因具有较大的比表面积和较大的孔径，不仅具有较高的丙烷氧化脱氢催化活性，而且具有较高的丙烯选择性。

In the last section, a chip sintered at 900 with the aidditive of vanadium oxide(V2O5) was exhibited.

最后，简单介绍了用铿妮钦体系以五氧化二钒为烧结助剂烧成的微波介质陶瓷制成的微波器件。

The conversion and selectivity of oxidation of 2-octano l to hexanoic acid by nitric acid using the mixed-addenda heteropolyacid H15- xPMoxV12-xO40·nH2O(n=20-40)as the catalys t were studied.

采用磷、钼、钒系列多元杂多酸作为硝酸氧化仲辛醇制己酸的催化剂，对其催化性能和选择性进行了实验研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。