氢

The high activity can be attributed to the following factors: 1 Because of the perovskite structure of the host materials, the positive and negative electric charge center is not superposable, and there is a electric field which can separate the photo generated electrons and holes efficiently in the microscopic field.

以层状基质热稳定性分析为依据，经过对制备方法的优化，在不同温度下进行硫化处理，在对催化剂进行产氢性能研究时发现，在以硫化钠和亚硫酸钠为牺牲剂的产氢体系中，插入硫化镉的复合层状催化剂负载一定量铂以后，具有较高的连续的光催化分解水的能力。

A combination analysis of SIP and in situ microbiological methods was applied on the anaerobic digestion of biomass organics suffering from severe acids inhibition. The studies found that accumulated acids were degraded mainly by Methanosarcina firstly with acetoclastic pathway and then with hydrogenotrophic pathway under mesophilic condition, whereas acids were mainly degraded to methane by the tandem reactions of syntrophic acetate oxidation and hydrogenotrophic methanogenesis under thermophilic condition.

联合应用稳定同位素表征技术和微生态原位表征方法，对高浓度有机酸胁迫条件下的生物质类有机物厌氧发酵甲烷化途径的研究结果表明，面临高浓度有机酸迅速累积的环境，中温发酵条件下，优势菌种为甲烷八叠球菌，依时间次序，通过乙酸发酵和氢营养型途径利用累积的有机酸产生甲烷；而在高温条件下，有机酸则通过乙酸氧化和氢营养型甲烷化途径的串联反应被降解。

Six operational taxonomical units were obtained on the 16S rRNA gene but only one on the Fe-hydrogenase gene of Clostridium.

结果发现产氢菌群中至少有6种，而Fe-氢酶基因只含有一种。

Hydrogenated terpinene maleic anhydride was prepared by catalytic hydrogenation of terpinene maleic anhydride in the presence of Pd/C catalyst.

研究了反应温度，压力，催化剂用量等因素对萜烯马来酸酐催化加氢制备氢化萜烯马来酸酐合成工艺的影响。

The product qualities,safety,transportation,storage,useful deposition ratios,deposition rates,one pass conversions,deposition temperatures,electrical energy consumption and manufacturing costs are summarized for silane,dichlorosilane,trichlorosilane and tetrachloro silane method s.

对三氯氢硅法、四氯化硅法、二氯二氢硅法和硅烷法生产的多晶硅质量、安全性、运输和存贮的可行性、有用沉积比、沉积速率、一次转换率、生长温度、电耗和价格进行了对比；对还原或热分解使用的反应器即钟罩式反应器、流床反应器和自由空间反应器也进行了比较。

We provided biomimetic synthetic methods for tetrahydro-β-carboline by using the benzimidazoline as a new tetrahydrofolate coenzyme model with tryptamine as nucleophile reagents under the condition of acid.

由四氢-β-咔啉类化合物，可制得多种具有较好抗病毒、抗菌和抗肿瘤活性的β-咔啉类生物碱，因而四氢-β-咔啉类化合物的合成受到人们的广泛关注。

Simultaneously we prepared benzimidazolines with two methods by the reducton of benzimidazolium salts with NaBH_4 and Grignard addition with benzimidazolium salts. Thus we provided a new biomimic synthetic method for 9 kind of tetrahydro-β-carboline starting from carboxylic aicd and halid. A convenient synthetic method for preparing tetrahydro-β-carboline was provided.

本文以1，3-二甲基苯并咪唑碘盐和2-取代的1，3-二甲基苯并咪唑碘盐为原料，采用了NaBH_4还原和Grignard试剂加成两种方法，制备了9种1，3-二甲基苯并咪唑烷和2-取代的1，3-二甲基苯并咪唑烷作为四氢叶酸辅酶一碳单元转移新模型，在酸性条件下，以色胺作为接受一碳转移的亲核试剂，完成9种四氢-β-咔啉类化合物的新合成方法研究。

The combination of tetralin and catalyst of nickel sulphate has a synergetic function to the reaction.

四氢萘供氢剂与硫酸镍催化剂复配使用对超稠油水热裂解有协同效应。

Among hydrogen donors tested, tetralin has the biggest effect on super heavy oil aqua-thermolysis.

供氢剂中四氢萘对超稠油水热裂解影响最大。

The optimal conditions were: reaction temperature 150℃, time 2.5h, mass ratio of wood to phenol 1: 6, catalyst (H2SO4) dosage 6.5%, tetralin dosage 20%. The liquefaction efficiency was 96% in above conditions.

白蜡枝桠材在供氢溶剂中的优化工艺为：反应温度为150℃、时间为2.5 h、木酚比为1：6、催化剂H2SO4用量为6.5%、四氢萘用量为20%，在此工艺条件下，液化效率可以达到96%左右。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐