查询词典 reducing agent

A review on the researches about co-enzyme NADH model compounds was given in the first part of this thesis. In the second part, some new synthetically useful reactions employing Hantzsch ester were discussed which are summarized as following (Scheme 1):Scheme 11 The selective reduction of the exocyclic double bond of the 4-arylmethylene- and 4-alkylidene-4H-isoxazol-5-ones and 4-arylmethylene-4H- pyrazol- 5-ones was achieved by using Hantzsch 1, 4-dihydropyridine as the reducing agent in ethanol.

论文包括两个部分：我们在第一部分对辅酶NADH模型化合物的研究作了综述，第二部分是反应研究，分为四章，我们发现和发展了辅酶NADH模型化合物—汉斯酯参与的几个具有合成价值的新反应和体系。

Using glyoxylic acid to replace the harmful chemical substance formaldehyde as a reducing agent, an copper layer was deposited on rosin substrate by this electroless copper plating technology.

用乙醛酸代替有害的化学药品甲醛作为还原剂，在树脂基材上进行化学镀铜。

Using glyoxylic acid to replace the harmful chemical substance such as formaldehyde as a reducing agent, an electroless copper plating on difficulty deposited substrates was fulfilled, which including Al,Ti and wafers having TiN and TiSiN as the barrier layers.The surface morphologies and grain structures of copper deposits prepared were analyzed.

摘 要：采用乙醛酸代替有害的化学药品作为还原剂的化学镀技术，在工业纯铝片、工业纯钛片、以TiN作为扩散防护层的硅片和以TiSiN作为扩散防护层的硅片等难镀材料实现了化学镀铜。

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。

This essay focuses on the extraction of Berberis heteropoda pigment with different impregnants, the influences that different pH condition and different mentalion take on the Berberis heteropoda pigment＇s stability, as well as that oxidizer and reducing agent take on its stability.

研究了不同溶剂对小檗色素的提取效果，以及不同pH、不同金属离子、氧化剂和还原剂对该色素稳定性的影响。

Starting from chiral proline, pipecolinic acid, piperazine-2-carboxylic acid and 1,2-diphenyl amino alcohol, a series of structurally simple and easily prepared amides were developed as highly effective Lewis basic organocatalysts for the asymmetric reduction of imines with trichlorosilane as the reducing agent, which promoted the reduction of N-aryl imines with high yields and excellent enantioselectivities with an unprecedented substrate spectrum.

本文分别由手性脯氨酸、哌啶酸、哌嗪酸以及氨基醇出发，设计和合成了一系列结构新颖、合成简便、性能优良的酰胺类有机小分子路易斯碱催化剂，以廉价的三氯氢硅为氢源，用这些催化剂催化亚胺不对称还原，得到了非常优良的收率、对映选择性和前所未有的底物普适性。

Some of the POV to be cured, it is a reducing agent and PVC and other additives by a mixture of proportioner, you can play the role of drying and curing.

如果搁置的剂量不妥，制卡和会员卡制息不入来的图像给么有一栽油腻腻的发觉，给么会有一栽褪了色的发觉。

Our company specializing in the production of sodium silicate is a large-scale production enterprises, Main products of water glass and an annual output reaching 100,000 tons, while sales of solid, water-reducing agent, soda ash, protopine, liquid.

我公司是一家专业生产水玻璃的大型生产企业，主营产品水玻璃年产量达到10万吨，同时销售固体、减水剂、纯碱、片碱、液碱。

The technical characteristic,function mechanics and produce techniques of naphtha-lene sulfate salt series superplasticizer,the high performance water-reducing agent such as sulfamic acid series and polycarboxylic acid se-ries,and the multiple superplasticizers are discussed.

对国内外仍广泛应用的萘系高效减水剂，氨基磺酸盐系、聚羧酸系等新型高性能减水剂以及复合型高效减水剂的主要特性、作用原理和合成或生产工艺进行了介绍。

Conventional sulphamate series superplasticizer is modified by modified monomer so as to improve the water retention and to reduce the bleeding rate of water reducing agent.

选用改性单体对传统氨基磺酸盐系高效减水剂进行改性，以提高减水剂的保水性、减小泌水率。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。