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From 1 to 7 weeks PC MG could be isolated from laryngeal swabs in all the vaccinated groups and the unvaccinated,but the isolation rate was lower in the former.7 weeks PC MG could be isolated from trachea,lung and air sac in the control group,while in Group I MG was isolated only from trachea and lung.

攻毒后第7周从对照组鸡的气管、肺、气囊中均可分离到MG,而试验Ⅰ组仅在气管和肺中分离到了MG。

The evolutionary trees of SARS - CoV and SARS - like CoV were made up by using the Brede virus as outgroup, and analyzed variation in single nucleotide sequence.

结果:发现两次SARS自然流行的病毒可分为两个明显不同的聚类;第二次流行时从人类中分离的SARS冠状病毒和从果子狸等动物中分离的SARS样冠状病毒可分为两个基因型,两型的主要鉴别依据是病毒的全基因组变异而非Spike基因序列。

Detachable transformer is an important component of contactless power transmission system. This paper sets up the model of dissociable transformer by ANSYS and discusses various factors that may have influence on transmission efficiency by ANSYS and offers several guidelines to realize systems.

可分离变压器是非接触电能传输系统的重要组成之一,本文利用ANSYS软件,建立了可分离变压器的模型进行仿真,分析了电流、线圈绕制方法、变压器间距、磁导率等各种可能会影响传输效率的因素,并为实际系统选择模型提供了参考依据。

In the first part, the concepts of the completely normal spaces and strong completely normal spaces in L-topological spaces are defined, which are the generalization of the completely normal spaces in general topological spaces. They are some good properties such as hereditary, weakly homeomorphism invariant properties, good L-extension, but they arent producible in general.

第一部分的主要内容如下:第一部分这一部分是将一般拓扑学的完全正规分离性的概念推广到了L-拓扑空间,给出了L-拓扑空间的完全正规分离性和强完全正规分离性的定义并讨论了它们的若干性质,比如,它们都是可遗传的,弱同胚不变的,"Lowen意义下好的推广"等。

This implies the existence of a polynomially bounded algorithm to find a shortest contractible cycle, a shortest separating cycle, and shortest cycle in an embedded graph in the projective plane and answers the open problems raised by Mohar and Thomassen in the case of projective plane embedded graph.

另一方面,通过定义嵌入图的几何对偶图及其相应的嵌入系统,得到几何对偶图中的可分离圈就对应于原图中的割;反之,若几何对偶图中的割在原图中对应于一个圈,那么该圈一定可分离。

Jamesonite, marmatite, pyrrhotite and pyrite are the complicated and mutiple-metal sulfide resources to process difficultly in Dachang Mine. Research on the basic theory of flotation electrochemistry and on potential-controlled flotation technology of the sulfide resources can be helpful to develop some new flotation theory and technology of the complicated and mutiple-metal sulfides, and to utilizate comprehensively the mineral resources, and to lower their production cost, and to improve the economical benefits. It is of important theoretical and practical significance.

脆硫锑铅矿、铁闪锌矿、磁黄铁矿、黄铁矿是大厂特有的难分离、难处理的复杂多金属硫化矿物资源,对其进行浮选电化学的基础理论和电位调控浮选技术研究,可发展复杂多金属硫化矿物浮选分离理论,形成复杂多金属硫化矿物浮选分离的创新技术,加强矿产资源的综合利用,降低成本,提高经济效益,具有重要理论意义和现实意义。

The effect of flow rates, initial concentrations, resin bed heights, its height/ diameter ratios and temperature on breakthrough curves of sulfuric acid/2-naphthalenesulphonic acid, 2-naphthalenesulphonic acid/sulfurous acid and sulfuric acid/ 2-naphthalenesulphonic acid/sulfurous acid systems was investigated. Excellent agreement was obtained between experimental data and the suggested breakthrough data model, with which the breakthrough curves can be accurately predicted for multi-component adsorptive separation in resin bed, the experiment of adsorptive separation may be scaled up, and the plant may be designed.

考察了流速,初始浓度,床层高度,床层高径比,温度等因素对硫酸-2-萘磺酸,2-萘磺酸-亚硫酸和硫酸-2-萘磺酸-亚硫酸等混合体系穿透曲线的影响,所建立的穿透曲线模型与实验结果拟合较好,模型可较准确预测多组分吸附分离的穿透曲线,可用于指导吸附分离实验的放大以及装置的设计。

Organic and compound cation garrulous coagulates the agent is to use chemical law compound a kind of new-style cation garrulous coagulates agent, belong to domestic and international initiate, with other and groovy drug photograph comparing has 5 big advantages: The photograph such as aluminium of as aggregate as commonly used drug chloridize, aggregate and vitriolic iron, vitriolic aluminium is compared, coagulate with garrulous of polypropylene acyl amine the agent is used jointly, medical dose is little, reduce useless water treatment to expend about 20 % thereby, 30 %; Effect of processing liquid waste is good, garrulous is round settling speed is fast, make liquid waste can second birth is used, managing water natural resources; Its garrulous group is sedimentary filterability can be good, slime can reclaim inside entire plant, namely energy-saving be helpful for protecting an environment again; Corrode to equipment small; Have muti_function, have agglomeration effect already, again garrulous coagulates action and the action that aid filter, can serve as filter aid.内容来自www.ch-water.com

有机复合阳离子絮凝(使液体中悬浮微粒集聚变大或形成絮团,从而加快粒子聚沉,达到固-液分离的过程)剂是利用化学法合成的一种新型阳离子絮凝(使液体中悬浮微粒集聚变大或形成絮团,从而加快粒子聚沉,达到固-液分离的过程)剂,属国内外首创,与其他常规药剂相比具有五大优点:与常用药剂聚合氯化铝、聚合硫酸铁、硫酸铝等相比,与聚丙烯酰胺类絮凝(使液体中悬浮微粒集聚变大或形成絮团,从而加快粒子聚沉,达到固-液分离的过程)剂联合使用,药剂量少,从而降低废水处理(通过物化方法去除水中一些物质的过程)费约20%—30%;处理废水效果好,絮团沉降速度快,使废水能再生利用,节约水资源;其絮团沉渣过滤性能好,煤泥可全部厂内回收,即节能又有利于保护环境;对设备腐蚀小;具有多功能,既有凝聚作用,又有絮凝(使液体中悬浮微粒集聚变大或形成絮团,从而加快粒子聚沉,达到固-液分离的过程)作用和助滤作用,可作为助滤剂。

In Chapter 6, Five kinds of different pesticides, such as simazine, atrazine, carbaryl, ametryne and prometryn were separated by CE technique and the effects of experiment parameters including pH, the concentration of surfactant and organic modifier on the separation were investigated.

采用毛细管电泳法对5种农药(西玛津、阿特拉津、扑草净、莠灭津和西维因)进行了分离研究,考察了溶液的pH值、胶束浓度和有机改性剂对分离的影响,添加阴离子表面活性剂的胶束毛细管电泳法可使各组分达到基线分离。

The magnetic circuit of the separate transformer is analyzed on the base of the introduction of the characteristics and types of the separate transformer.

在阐述可分离变压器特点和分类的基础上,对可分离变压器的磁路进行了分析。

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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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。