还原

The optimum condition of reduction in graphite vessel in vacuum is explored, and the mechanism of nickel reduction is concluded.

探索出石墨炉真空还原制备粉体的最佳反应条件，同时对Ni的还原机理进行了归纳总结。

At certain temperature and hydrogen flow rate, the weight changing of tungsten trioxide during the reduction was investigated by thermo balance, and the phase transformation analyzed by means of XRD.

在一定的温度和氢气流量条件下，用热分析天平精确测量WO3 还原反应过程中，不同时间的质量变化，并用X射线衍射分析进行物相鉴定，绘制纳米级WO3 (粒径≤ 5 0nm)的还原动力学曲线。

Tungsten trioxide; oxidation-reduction method; ultrafine tungsten powder; hydrogen reduction; reduction kinetics

工程科技II，工业通用技术及设备，工业通用技术与设备三氧化钨；超细钨粉；氧化-还原法；氢还原；动力学

When surface of TiO2 powder is enveloped by carbon, the reduction is mainly solid-solid reaction between carbon and titanic oxide.

结果表明钛氧化物的还原是逐级进行的，反应过程伴随着相变，当TiO2粉末和C粉末均匀混合时还原碳化反应主要依赖于CO／CO2传质的气固反应，当TiO2颗粒表面被C包膜时主要是碳和钛氧化物之间的固固反应，当TiO2粉末和C粉末混合压球时则两种反应机理均有。

Some industrial reduction technologies, such as zinc powder method, hydrazine hydrate method, sodium sulfide-zinc powder method etc, were analyzed and compared.

对生产工艺中各种还原方法（锌粉法、水合肼法、硫化钠－锌粉法等）进行了分析对比，指出硫化钠－锌粉法是一种适于工业化的还原方法。

The amount ofethylene release by shoot apex and root showed no difference between iron-deficient treatment and control plants above before the appearance ofrelatively high reductase activity,which indicated that ethylene may not playa direct role in regulation of root ferric reductase activity,and the inhibitionof which by〓and〓may be caused by other reasons.

缺铁处理植株茎尖和根系乙烯释放量的测定结果显示，三种植物中，缺铁与对照植株的茎尖及根系所释放的乙烯可能不直接参与缺铁根系还原酶的调控，〓和〓对缺铁根系〓还原酶活性的抑制可能是其它原因所致。

REE geochemical characteristics and their systematic changes in the sedimentary section suggest that there existed a process of ingression-regression in this area in the early Cambrian period. The black shale series resulted from the mixing between normal seawater sediments and hot seawater sediments and were deposited under the transitional condition from reduction to semi-reduction and weak oxidation in a shallow-sea clinoform zone of a relatively deep sea environment with dry climate.

稀土元素地球化学特征反映该区早寒武世曾发生过一次明显的海侵-海退过程，黑色岩系为正常海水与热水混合沉积的产物，形成于缺氧还原状态过渡到半还原-弱氧化状态的过程中，沉积环境为干燥气候条件下相对较深的浅海斜坡环境。

During the reduction process in the shaft furnace, sulphur may move in different directions between the solid raw materials and the reducing gas.

在竖炉直接还原生产海绵铁的过程中，没有熔剂和造渣过程，矿石或球团仅与还原气接触。

Thermodynamic calculation shows that sulphur contained in raw materials in the form of FeS_2 can decompose into FeS in the upper part of the shaft furnace.

一、对竖炉还旅过程中硫行为的一般认识竖炉直接还原的生产实践，推翻了&还原气氛下矿石不可能脱硫&的传统看

And we established six new synthetic routes to nanostructured materials, such as (1) solvothermal element direct reaction,(2) organic solvent room-temperature conversion,(3) solvothermal co-reduction,(4) solvothermal self-reduction,(5) mid-temperature reduction-Pyrolysis-Catalysis,(6) hydrothermal chemical self-regulation, etc. Successfully synthesized over twenty kinds of semiconductor, InAs, InSb, diamond, CdS, ZnSe, CdSe, CdTe, HgSe, HgTe, ZnGa〓O〓 and so on.

建立了溶剂热元素直接反应、有机溶剂室温转化、溶剂热共还原、溶剂热自还原、中温热解催化合成、水热化学反应自控制等六种纳米材料合成新方法，成功地合成出InAs、InSb、金刚石、CdS、ZnSe、CdSe、CdTe、HgSe、HgTe、ZnGa〓O〓等二十余种半导体纳米材料。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。