查询词典 reagent

The semi-synthetic pharmaceutical wastewater was pretreated b Fenton reagent process. At the same time the oaring effects and the biodegradation of the wastewater after the Fenton reagent process were investigated. The preliminary operating conditions were determined by orthogonal experiments, and each effecting factor was analyzed.

采用Fenton试剂法对合成制药废水进行预处理，研究了各因素对其处理效果的影响以及经Fenton试剂处理后废水可生化性的变化。

Standardize this solution by titrating 25.0 mL with the Reagent, previously standardized as directed under Standardization of the Reagent.

用卡尔试剂滴定25.0ml的上述溶液去标定该溶液，标定参考之前卡氏试剂的标定。

Advances on the development of new oxidation reagents and methodologies and their applications in both target-and diversity-oriented synthesis have been regularly surveyed and constituted one of the most extensively and actively investigated areas of current organic synthesis.1 In this context,a plethora of oxidants,including those small organic molecule-based reagents (such as Dess-Martin periodinane,Swern oxidation,Moffatt oxida- tion,Corey-Kim oxidation,and 三氧化硫/pyridine)and metal-based systems(such as Jones reagent,Collins reagent,pyridinium chlorochromate,pyridinium dichromate,barium permanganate, manganese dioxide,ruthenium tetroxide,silver carbonate,and Oppenauer oxidation),have been identified to be powerful tools promoting conversion of various alcohols into their corresponding aldehyde or ketone products and thus evolved as a most important class of tools in synthetic chemists'arsenal.

关于新的氧化试剂和方法，在两个目标和多样性为导向的发展及其应用合成的进步定期调查，构成一个最广泛，积极探讨在这方面，过多的地区目前有机合成。1氧化剂，包括有机小分子为基础的试剂（如Dess - Martin氧化剂，斯文氧化反应，氧化法特，科里，金氧化，三氧化硫/吡啶）和金属为基础的系统（如琼斯试剂，柯林斯试剂，吡啶氯铬，吡啶铬，钡锰，二氧化锰，四氧化钌，银碳酸盐和开瓶器氧化），已被证实为推动中相应的醛或酮醇转化的各种产品，功能强大的工具，因而作为一个最重要的阶级演变在阿森纳的工具合成化学家。

There are three different nucleophilic reagent respectively reaction with m-dinitrobenzene ramification at distint alkaline term:With the nitrobenzene 、 m-nirtobenzenesulfone sodium salt 、 2.4-dinitro chlorobenzene 、 m-dinitrobenzene for bottom thing, benzyl cyanide、 benzyl chloride、 benzyl chloropyridine、is a nucleophilic reagent reaction for under the different term proceeds a series reaction. At the same time ,discuss about the impact factor to nucleophilicity such as the number of attract electron group、 ability of attract electron and the nucleophilic substitution reaction part.

设计了三类不同的亲核试剂分别与活化芳环在不同的碱性条件下发生反应：以苄基氰、苄基氯化吡啶为亲核试剂，以硝基苯、间二硝基苯、间硝基苯磺酸钠、2，4-二硝基苄基氯为底物进行亲核取代反应；并且对亲核试剂的体积效应、溶剂效应对亲核性影响，底物上吸电子基团的数目、吸电子能力对亲电性的影响，以及亲核取代反应的发生部位受哪些因素影响进行探讨。

Methods According to the drinking water legislation in Europe threshold: 0.10mg/L NO2(superscript -, a rapid spot test method for nitrite in water was established by using an optimized composition of reagent mixture and a binary positive/negative response, conducted as follows: a tablet of a mixture of solid reagents containing sulfanilamide, N-(1-naphthyl) ethylene diamine dihydrochloride and sodium chloride was put on a spot test plate of Teflon mould, then, a drop of 30% HCl and a drop of water sample were added on the reagent material.

根据欧洲饮水法规亚硝酸盐限值(0.10mg/L)，使用一种优化的试剂混合物和二元的阳性－阴性反应，建立一种水中亚硝酸盐快速点滴检验法。结果将1片含磺胺、N-（1-萘）乙二胺二盐酸盐和氯化钠的固体试剂混合物放在聚四氟乙烯模的点滴检验板上。加1滴30%盐酸和1滴水样于试剂片上。

The results show that when sulfuric acid was used as hydrolytic reagent, metal salts were the best catalyzer, increasing the production of amino acid by 18.0% as compared with the treatment of no addition of catalyzers, and when potassium hydroxide was used as hydrolytic reagent, however, sodium sulfide was the best, increasing production by 39.8% as compared with treatment of no addition of catalyzers.

结果表明：酸、碱处理条件下不同处理间差异显著，酸处理条件下以金属盐作用效果最好，增产率18.0%；碱处理条件下以硫化钠作用效果最好，增产率达39.8%。

The β-ditones and the match thing of its derivatives be the mufti-functional materials in the metals organic LCD, the extract reagent, chemical shift reagent and the defend false material, etc. have already caused the widespread interesting. Recently, it is discovered thatp-ditones compounds have Photoluminescence and Electroluminescence flaring dual properties, can also take place the certain interaction with gene, and have good applied foreground to the development of the new mufti-functional materials.

一二酮及其衍生物的配合物作为新型多功能材料在金属有机液晶、萃取试剂、化学位移试剂、防伪材料等方面己引起人们普遍的重视，近年又发现该类化合物同时具有光致发光及电致发光的双重性，还可以与基因发生一定的相互作用，对新型多功能材料的开发具有良好的应用前景。

The β-ditones andthe match thing of its derivatives be the mufti-functional materials in the metalsorganic LCD, the extract reagent, chemical shift reagent and the defend false material, etc.have already caused the widespread interesting. Recently, it is discovered thatp-ditonescompounds have Photoluminescence and Electroluminescence flaring dualproperties, can also take place the certain interaction with gene, and have good appliedforeground to the development of the new mufti-functional materials.

一二酮及其衍生物的配合物作为新型多功能材料在金属有机液晶、萃取试剂、化学位移试剂、防伪材料等方面己引起人们普遍的重视，近年又发现该类化合物同时具有光致发光及电致发光的双重性，还可以与基因发生一定的相互作用，对新型多功能材料的开发具有良好的应用前景。

In accordance with the results of X-ray diffraction of the powder on mortar surface and pore structure tests of mortar covered with painting reagent s on exterior walIs of building, mechanism of painting reagent s protecting against acid rain corrossion has been theoretically analysie

根据涂刷涂抹剂的建筑外墙砂浆的结构和砂浆表面粉末的x－射线衍射测试结果，从理论上分析了涂抹剂抗酸雨侵蚀的机理。

Material and method mop of anus of patient of diarrhoea of appearance of cholera of 1.1 sample origin 3 portion, puke 1. 1.2 reagent are fostered base minim biochemistry is in charge of (epidemic prevention of sanitation of logistics department of Zhejiang province military region examines a), detached agaragar (Jiangsu province sanitation and antiepideic station is microbial reagent factory), diagnostic serum of institute of biological product of Chengdu of Ministry of Public Health. System of APl20E biochemistry appraisal .

ETEC常见散发感染性腹泻，也有报道因ETEC污染水源而暴发腹泻[3]，笔者报告的是一起家庭型食物中毒患者肛拭中检出一株肠产毒性大肠埃希菌O6∶K15。1材料和方法1.1样品来源霍乱样腹泻病人肛拭3份、呕吐物1份。1.2试剂培养基微量生化管(浙江省军区后勤部卫生防疫检验所)，分离琼脂(江苏省卫生防疫站微生物试剂厂)，诊断血清(卫生部成都生物制品探究所)。

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。