还原剂

It can just react in aqueous acetic acid and only when the concentration is as high as 50vol.

溶剂和还原剂种类对分子氧氧化的苯经基化反应有着至关重要的作用。

The preparation of six types of organoborane reagents based on pinene was reviewed,and the progress in the reduction reactions of ten classes of ketones and in their application was outlined.

综述了由蒎烯衍生的六种有机硼还原剂的合成方法，并讨论了这些还原剂对十类不同类型酮的还原反应及其应用。

In this paper,the selective reduction roasting experimental study is chiefly introduced,in which coal is used as reductant.

研究确定了最佳工艺条件为：采用烟煤做还原剂，还原剂加入量为矿量的10%；粒度在0～3mm，-0.074mm含量约占25%；焙烧时间20～30min；焙烧温度700～750℃。

The thermodynamics and the dynamics mechanism have been studied.The results show that it is advisable for the HCHO and NaH_2PO_2 as the reduction due to the electrode potential of the reduction is more negative than that of Cu~ 2+ from the analysis of data in thermodynamics.It is advantage for the reaction of electroless copper in the alkaline solution. According to the analysis of Tafel slope of a cathodal polarization curve,...

结果表明：从热力学数据分析看，还原剂的电极电位皆比铜离子负，用甲醛、次亚磷酸钠做还原剂还原Cu2+在热力学上是可行的，在碱性溶液中对化学镀铜反应有利；从阴极极化曲线的Tafel斜率分析看，Cu2+=Cu+步骤为阴极反应的速度控制环节；从镀液的旋转圆盘电极测试结果分析看，电子跃迁步骤H2CO-ad rdsHCOOH+1/2H2+e-为镀液中阳极反应速度的控制性步骤。

The results indicated that 40% ethanol and water can dissolve Berberis heteropoda pigment better; the pigment is stable in acidic condition; iron ion can increase the absorbency of the pigment; the influences of reducing agent is greater than oxidizer＇s.

结果表明，小檗色素在40％的乙醇溶液及水中的溶解效果最好；在酸性条件下色素较稳定；铁离子对其有增色作用；氧化剂、还原剂对色素稳定性均有影响，其中以还原剂影响较大。

The stabilities of the extract from sanguisorba under different pH, light, heat, ultraviolet ray, oxidant, reducing agent and additive agents were studied. It was indicated the products could widely used in the condition of weak acid or neutral, while they were not stable to heat and light, so they should be used without light and at low temperature. The products had a strong ability to withstand ultraviolet ray. They could easily be oxidized and degraded by oxidant while they were not easily affected by reducing agent and were almost not affected by additive agents. The extract from the stem of sanguisorba was analyzed by UV and FTIR, showing that the structures of the active components were not changed during ultrasonic wave extracting.

研究了pH值、光、热、紫外线、氧化剂、还原剂以及添加剂对地榆提取物稳定性的影响，结果表明地榆提取物适合弱酸或中性条件下使用，使用范围比较广；但对光热稳定性较差，适合在避光低温的环境；具有很强的抗紫外线能力；氧化剂对地榆提取物稳定性影响较大，会加速其降解，还原剂对地榆提取物影响不大；其他添加剂对其稳定性几乎没有影响；并通过UV和FTIR光谱分析，超声波浸提没有对地榆根茎中有效成分的结构发生改变。

In order to radically improve the present silicothermic reduction process for magnesium smelting, this paper started with the idea of taking liquid calcium as reductant and studied the feasibility of the new magnesium reduction process deoxidizing by liquid calcium .

为了从根本上改进现行的硅热法炼镁工艺，从新的还原剂——液态钙着手，研究了用液态钙为还原剂的金属镁还原新工艺的可行性。

The results from ultraviolet-spectrometer and TBA methods suggested 〓Cu〓 could cause the liposome peroxidation in the presence of reductants.

使用紫外分光光度计和TBA法发现〓Cu〓在还原剂的作用下会引起脂质体过氧化，这种作用对还原剂和铜离子有依赖性。

In order to reveal the nature of reducibility of organic compounds and find theoretical basis for the selection of organic reductants, the electronic structure of studied organic reductants and related organic compounds has been calculated by means of HMO method、CNDO/2 method in quantum chemistry. It was discovered that the energy of the highest occupied molecular orbital of organic compounds has best correlation with their reducibility, and theoretical criterion for reducibility of organic compounds was presented.

为了揭示有机化合物还原性的本质，为有机还原剂的寻找提供理论依据，应用量子化学HMO法、CNDO/2法计算分析了研究的有机还原剂及相关有机化合物的电子结构特性，发现有机化合物的最高占据分子轨道HOMO能量与其还原性之间具有最好的相关性，据此提出了有机化合物还原性的理论判据。

In the Purex process, the separation of plutonium from uranium is achieved by using reductants which can quickly and quantitatively reduce Pu to Pu.Up to now the reductant U-N2H4 is still used widely for separation of Pu from U in the rep...

目前动力堆乏燃料后处理中广泛采用的钚还原剂还是由肼支持的四价铀，而醛、肼、羟胺类有机无盐还原剂在Purex流程中的应用目前还停留在实验室研究阶段。

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。