还原

However, the synthetic potential of plant cells as a reducing agent of the nitro group has never been discovered, despite the fact that the reduction of nitro compounds is one of the most classical reactions in organic synthesis.

然而尽管硝基还原是最为经典之一的有机反应，在有机合成上还没有使用植物细胞还原芳香硝基化合物的报道。

METHODS: Heparin with an aldehyde group as reducing end was prepared by nitrous acid degradation method.

将肝素钠用亚硝酸降解法降解，得到还原末端为醛基的肝素，分别溶解于二甲亚砜、含0.05 mL，0.5 mL冰醋酸的二甲亚砜溶液，再与对巯基苯胺发生还原胺化反应，用氰基硼氢化钠作还原剂，得到带巯基的肝素衍生物。

The view I am advancing is ontologically reductive but not reductionist in the sense that many anti-reductionists find objectionable.

这个观点的推进是'存有上的还原'，但不是反还原论者发现可反对的那种还原论。

Contemporary education will be reductive consider the methodology base with serve as main, teach phenomenon and educational activity complexly originally by reductive for simple corporeal fact, the person's existence by reductive for order of a group of societies.

现代教育将还原论作为重要的方法论基础，原本复杂的教育现象和教育活动被还原为简单的物质事实，人的存在被还原为一组社会秩序。

The results showed that the heavy metals in various mediums were mainly Cu and Ni, and those concentrations were, in the descending order, in ditch, tailings, slagheap and cultivated soil. In the tailings and the sludge of the ditch, the concentrations of Ni were obviously higher than those of Cu. Whereas, in the soil and the weathering and atmospheric deposition of the waste slagheap surface, the concentrations of Cu were higher than those of Ni. This means that in the first two mediums, Cu and Ni mainly originated from the tailings, while in the latter two mediums, Cu and Ni mainly came from the atmospheric deposition of airborne particles of the smelting. Cr and Zn were mainly in residual fraction, Cu was mainly in oxidizable and residual fraction.

结果表明：不同区域环境中重金属呈现不同程度累积，其中以Cu、Ni最为显著，含量由高到低依次为尾矿坝排污沟＞尾矿坝＞废渣堆＞农田土壤；尾矿砂和沉积物中重金属分布以Ni含量显著高于Cu含量为特征；而农田土壤和风化物及降尘中重金属分布以Cu含量高于Ni含量为特征，前者Cu、Ni主要来源于尾矿，后者与冶炼烟尘排放有很大关系；样品中除Cr、Zn以残渣态为主外，Cu、Ni、Pb化学形态分布有较大差异，Cu以可氧化态和残渣态为主，Ni以可还原态为主，其次为弱酸提取态，Pb以可还原态为主，其次为残渣态。

The activities of glycerol dehydrogenase and 1,3-PD oxidoreductase were also studied, and it was found that the activity of GDHt was enhanced, but the mutation had little influence on the activity of PDOR.

同时测定了诱变前后还原途径中甘油脱水酶和1，3-丙二醇氧化还原酶的酶活变化，研究表明诱变对GDHt有明显的促进作用，而对PDOR的影响不明显。

The potential sources of NO in plants include nitric oxide synthase, nitrate reductase, xanthine oxidoreductase and the nonenzymatic pathway.

在植物中， NO的潜在来源包括一氧化氮合成酶、硝酸还原酶、黄嘌呤氧化还原酶和非酶促途径。

The reduction of oxime was investigated and the 17-amino steroid was obtained via reduction with Ni-Al alloy in yield of 85~90%.

本文尝试了六种将肟还原成胺的方法，发现在氢氧化钠溶液存在下用镍-铝合金还原甾体肟化合物，反应条件温和，反应时间短，产品收率85～90%。

Whenpyridine was used as reductive decomposing agent, the expecting cholest-4-en-3,6-dione-22-al was obtained. However, when Zn/HOAc was used to decomposethe ozonide, C-4,5 double bond was further reduced to give cholest-3,6-dione-22-al as main product. 2 For the side-chain construction of compound (1), the solid-liquid phase-transfer Wittig reaction was used. When (3-methyl-2-oxobutyl)-triphenylarsonium bromide was used as reagent, the reaction can be carried out inmild reaction condition and the yield is higher than that when phosphorane wasused.

但使用Zn／HOAc作为分解剂时，却得到其氢化产物胆甾-3， 6-二酮-22-醛；2在甾体支链引入过程中，采用固-液相转移Wittig反应的方法，用(3-甲基)-2-氧丁基三苯基溴化胂作为试剂，反应在非常温和的条件下便可完成，而且产率比传统采用膦烷的方法更高；3在对某些甾酮化合物的选择性还原反应研究时，发现在〓还原体系中，当加入某些金属离子后，反应有更好的区域选择性和立体选择性。

Based on Monte Carlo method,four different weighted function moment methods for Pearson Ⅲ distribution which were developed in China are first compared by using the evaluation standard considering unbiasness and effectiveness of parameters and design values.

利用统计试验方法，以参数及设计值不偏性、有效性为评价标准，比较了现行几种权函数参数估计法，结果与以理想样本还原准则为标准所得的结论截然相反，以不偏性、有效性标准的结论是数值积分权函数法，并未对马秀峰权函数法作出改进，还从理论上比较分析以上两种评价标准，结论是理想样本还原为标准来评判估计方法的优劣存在较大缺陷，建议今后尽量不要使用该标

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。