株

It appeared that in that country the disease was caused by an antibiotic-resistant strain of E.

在那个国家，此病是由一株抵抗抗菌素的埃希氏大肠杆菌菌株引起，由公猪传播的。

It appeared that in that country the disease was caused by an antibiotic-resistant stra in of E.

在那个国家，此病是由一株抵抗抗菌素的埃希氏大肠杆菌菌株引起，由公猪传播的。

Evaluation of IEM103 in rabbit animal model.The evaluation was based on the control-challenge study (IEM101 as control). Rabbits were laparotomized, injecteded 10〓 cfu directly into proximal small bowel, and 28 days later, challenged with 0.25--2ug CT and 10〓-10〓 cfu 4 wild toxic strains with different biotypes and serotypes. Experimental group developed antitoxic and significant vibriocidal immune responses to vaccination, and could protect no less than 2ug CT and 10〓-10〓 cfu all wild strains challenge.

IEM103的免疫原性评价：经兔肠段结扎免疫〓cfu IEM103，7天后在外周血中可检测到外周淋巴细胞分泌性抗CT IgG，血清中可检测到抗CT抗体、杀弧菌抗体，P／N均≥2，且可持续至28天。28天后用0.25-2ug CT毒素，四种毒株滨-43，吴江-2，395，1119〓cfu菌量攻毒，实验组可保护至少2ug CT攻毒，而对照组可保护1ug以下CT攻毒，两组均可保护〓cfu四种毒株攻毒（以肠积液量≥1.0ml／cm为不保护判断标准）。

Two strains were isolated from active sludge that could oxidize the arsenite.

结果从活性污泥中筛选了两株具有As氧化能力的菌株。

The results suggested that the hypovir-ulence - associated genetic elements existed in the cells of isolate Ep- 1PN unequally, andsome cells were shortage of the hypovirulence- associated genetic elements.1572 sexual progenies of isolate Ep- 1PN were obtained through single- ascospore -isolation from seven apothecia.

本文对核盘菌Ep-1PN菌株的弱毒特性及其相关特性的遗传特点进行了分析，并评估了Ep-1PN菌株及其弱毒因子防治菌核病的生防潜能，现将结果报道如下

This strain was deposited in China General Microbiogical Culture Collection Center, named Bacillus subtilis NX-2 with the accession number of CGMCC No. 0833. Assimilability to carbon source by NX-2 was unique.

本论文主要工作如下：以L-谷氨酸分离培养基为特定的"筛子"，通过大量的筛选和工作，获得了一株高产γ-PGA的菌株枯草芽孢杆菌N X-2。

The result showed that 15 ISSR primers tested could produce distinct and polymorphic fingerprints among 14 cultivated strains of Auricularia auricula.

在选用的15个ISSR引物中，有2条引物建立了14个菌株的指纹图谱，其能将所有供试菌株相互间区分开来，并表现出丰富的遗传多样性。

In order to select high nitrogen-fixing azotobacter strains, nitrogenase activity of 13 strains separated in the rhizosphere in Gansu non-leguminous crop fields were measured by acetylene reduction method. Also the fertilization effect of the strains on spring wheat was investigated via pot experiment.

为挑选具有高固氮能力的自生固氮菌菌株，用乙炔还原法对甘肃省春小麦和玉米等非豆科作物根际土壤中分离所得的13株菌进行固氮酶活性测定，并通过盆栽试验对其进行春小麦肥效试验。

Two phylogenetic trees was inferred based on 18srRNA sequence of Hebei, Liaoning province, Lintan, Ningxian in Gansu and the other species of Babesia and Theileria available in GenBank.

结果发现自河北、辽宁、临潭、宁县四个地区分离株建立的进化树上，临潭与宁县的虫株亲缘关系较近，同源性是91.4％；而辽宁与河北的同源性是95.8％。

To evaluate the specificity of the PCR, genomic DNA of Theileria annulata,Babesia bovis,Toxoplasma gondii,Leishmania donovani and standard strain of N. caninum were used as a template in the PCR. For determining the detection limit of amplification procedure, PCR was run on a dilution series of genomic DNA from N. caninum（1.562 5-200 ng/ml）. Brain tissue samples of 32 aborted fetuses were detected by PCR-based assay, and 23 blood samples from mothers were tested by ELISA. Results The amplified DNA fragment （350 bp）had a high identity of 98% with the Nc-5 gene sequence of N.

以环形泰勒虫、牛巴贝斯虫、刚地弓形虫、杜氏利什曼原虫以及犬新孢子虫标准株DNA为模板进行扩增以验证PCR的特异性，采用紫外分光光度计测定犬新孢子虫标准株DNA浓度和纯度，取高纯度的DNA样品用灭菌水稀释，分别取不同量的DNA进行PCR扩增，确定PCR方法的敏感性；利用该方法对32份奶牛流产的胎牛脑组织样品进行检测，同时，对其中23份流产的母牛血样进行ELISA血清学检测，以评价犬新孢子虫PCR方法的检测效果。

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。