查询词典 synthesis method

A better method of decreasing free formaldehyde and free phenol during the synthesis of phenolic resol resin was investigated.

经分析，改性后的酚醛树脂中，游离酚和游离醛的含量进一步降低。

Organic Chemistry is the study of the chemical method of organic synthesis of a variety of useful science.

有机化学就是研究用化学的方法合成各种有用的有机化合物的科学。

The reaction mechanism,process,operation conditions and main technical indexes for the synthesis of vinyl chloride from acetylene were introduced briefly as well as the specification and preparation method of mercuric chloride catalyst s.

简单介绍了乙炔法合成氯乙烯的反应原理、工艺流程、操作条件和主要技术指标，以及氯化汞催化剂的规格和制备方法，讨论了氯化汞催化剂的缺陷，总结了在减少汞流失方面对氯化汞催化剂进行改良的进展情况。

This paper presents a new method to design oversampled linear phase Nearly Perfect Reconstruction DFT modulated filter banks with different analysis and synthesis prototype filters.

提出了一种具有不同分析和综合原型滤波器的线性相位过采样NPR DFT调制滤波器组的设计方法。

A new simpler method for the design of oversampled Nearly Perfect Reconstruction DFT modulated filter banks with different analysis and synthesis prototype filters is presented.

提出了一种具有不同分析和综合原型滤波器的过采样几乎完全重构DFT调制滤波器组的更为简单的设计方法。

A new simpler method for the design of oversampled Nearly Perfect Reeonstruetion DFT modulated filter banks with different analysis and synthesis prototype filters is presented.

提出了一种具有不同分析和综合原型滤波器的过采样几乎完全重构DFT调制滤波器组的更为简单的设计方法。

The final step in the historical method is synthesis.

历史方法中的最后步骤是综合。

The method of tail gas harness of trichlorosilane synthesis furnace were introduced and compared.

介绍了治理三氯氢硅合成炉尾气的方法，并进行了比较。

The method of tail gas harness of trichlorosilane synthesis furnace were introduced and compared.

介绍了治理。氯氢硅合成炉尾气的方法，并进行了比较。

This research utilized the method of organic synthesis, researching different amounts and positions of hydroxy-substituted benzoic acid and serotonin into amide reaction, so as to produce a series of polyhydroxy substituted N-benzoylserotonin derivatives (compound 1-10). Accordingly, this study conducts the following four tests. I. The activity of antioxidant and the experiment of ability to scavenge DPPH free radical, II. The ability of overall antioxidant—the activity of TEAC, III. The activity test of inhibit Tyrosinase, and IV. The study of absorbing UV / VIS Spectrophotometers. This study use trolox, arbutin, and octyl salicylate as the control groups, and to test the ability of anti-oxidation, the activity of inhibit Tyrosinase, and the ability of absorbing UV. This research ultimately intends to investigate the applied value of those compounds into cosmetics.

本研究主要利用有机合成的方法，将不同数量及不同位置的羟基取代苯甲酸化合物与色洛冬宁进行醯胺化反应后，得到一系列的多羟基取代之N-色洛冬宁苯甲醯胺衍生物（化合物1 ~ 10），进行四种不同活性测试方法：一、清除DPPH自由基能力抗氧化活性测试；二、总抗氧化能力活性测试；三、抑制酪胺酸酶活性美白测试；四、紫外线／可见光光谱仪吸收测试，并以水溶性维生素E、熊果素、水杨酸辛酯当作对照组，探讨其抗氧化能力、抑制酪胺酸酶的活性能力与吸收紫外线能力，再进一步探讨其应用於化妆品上的价值。

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。