氧化钒

The processes of smelting high vanadium ferrovanadium with vanadium pentoxide and vanadium trioxide are probed into, appropriate parameters are pointed out, and the two processes of smelting high vanadium ferrovanadium are compared.

对使用五氧化二钒和三氧化二钒混合料冶炼高钒铁的工艺进行了探讨，指出了适宜的工艺参数，并对生产高钒铁的两种工艺技术进行了比较。

In this paper,the situation of vanadium pentoxide market at home and abroad is briefly described,The output,consumption and price of vanadium pentoxide are introduced.

本文简述了国内外五氧化二钒市场状况，介绍了五氧化二钒生产、消费及价格等方面的情况，并对其市场进行了分析和预测。

It is based on the facts that in the presence of sulfuric acid and sodium dodecyl benzene sulfonate, vanadium activated by vitamin C can catalyze potassium bromate to oxidize safranine O, the oxidation products of safranine O can emit intense and stable fluorescence on nitrocellulose membrane.

基于在硫酸介质和十二烷基苯磺酸钠存在下，抗坏血酸活化钒催化溴酸钾氧化番红花红O发射强而稳定的荧光的特性，建立了ⅤC活化溴酸钾氧化番红花红O催化荧光法测定痕量钒的新方法。

The results show that a little amount of heteropolymolybdovanadophosphate can remarkably speed the degradation, the best conditions of the oxidative degradation of chitosan with hydrogen peroxide catalized by heteropolymolybdovanadophosphate in homogeneous condition are as follows: the ratio of catalyst and chitosan is 1 to 10, concentration of hydrogen peroxide is 0.15%, the temperature is 80℃, reaction time is 2h. 0.2g chitosan was degraded under the best condition and the molecular weight by viscometry was degraded from 1460000 to 7812. then water-soluble chitosan was obtained by this method; The heterogeneous method is a high efficient way, the best condition of this method are as follows: the ratio of catalyst and chitosan is 2 to 100, the volume of 30% hydrogen peroxide is about 3mL, the temperature is 90℃, reaction time is 5min～30min.

研究结果表明，适量磷钼钒的存在可显著加速壳聚糖的降解，磷钼钒催化过氧化氢均相氧化降解壳聚糖的适宜反应条件是：催化剂与壳聚糖的质量比为1∶10、过氧化氢百分浓度为0.15％、反应温度为80℃、反应时间为2h，在此条件下对0.2g溶解在100 mL 0.5％稀醋酸中的壳聚糖进行降解，可使壳聚糖的粘均分子量由原来的146万下降到七千多(7812)，成为水溶性低分子量壳聚糖，从而达到应用的要求；在异相条件下以磷钼钒为催化剂催化过氧化氢氧化降解壳聚糖是一种高效快速的方法，此法降解壳聚糖的最佳反应条件是：催化剂与壳聚糖的质量比为2∶100；30％过氧化氢的用量为3mL左右；反应温度为90℃、反应时间为5min～30min。

The tetravalence vanadium was found in V2O5 gel thin films by measuring the electrical resistance change of V2O5 gel thin films with temperature, ESCA and X-ray diffraction analysis. in this paper, from miniamount redox in melting V2O5 and crystal structure, the influencing mechanism of miniamount redox on changing valence of vanadium was analyzed and discussed in detail.

通过对V2O5凝胶薄膜试样的电阻随温度的变化测试和电子能谱和X射线衍射分析发现V2O5凝胶薄膜中有四价钒的存在，本文从V2O5熔体的微量氧化还原和晶体结构的角度分析讨论了微量氧化还原影响钒离子价态变化的机理。

Methods 40 serum samples of high, middle and low bilirubin concentration were determined by vanadic acid oxidation assay and compaired with diazo method. The precision, sensitivity, stability and interference of vanadic acid oxidation assay were analysed.

收集40例高、中、低浓度的血清样本进行钒酸氧化法与重氮法的比对，分析钒酸氧化法的精密度、灵敏度、稳定性并做干扰实验。

When vitamin C concentration was ≤0.5g/L, both vanadic acid oxidation assay and diazo method bad no interference. When triglyceride was ≤6 mmol/L, the vanadic acid oxidation assay had no interference and the diazo method had significant interference.

维生素C≤0.5 g/L时对钒酸氧化法和重氮法均无干扰，三酰甘油≤6 mmol/L时对钒酸氧化法无干扰，对重氮法有明显干扰。

The physical chemistry property and the application of vanadium trioxide, the technological process, the various materials and the reductants used for production of vanadium trioxide both at home and abroad are introduced.

介绍了三氧化二钒的物理化学性质、途以及国内外制取三氧化二钒的各种生产工艺，采用的各种提取原料、原剂等。

The results showed the content of acid soluble fraction, reducible fraction, oxidisable fraction and total vanadium showed positive relationship with the adding vanadium in soil, while residual fraction kept constant.

结果表明，土壤中酸可溶态、可还原态、可氧化态钒及总钒与钒施加浓度呈正相关，残渣态钒含量保持稳定。

Initially, vanadium oxide V2O3 was prepared through direct reduction using high purity hydrogen.

其中，三氧化二钒是通过氢气直接还原五氧化二钒来生成的。

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％。