株

Producing stains. Methods The drug susceptibility of 42 AmpC and ESBLs producing Klebsiella were detected by Kirby?Bauer motheds, Vitek 60 and Vitek 32 method. And the results were compared with those of 24 Klebsiella producing AmpC but nonproducing ESBLs and those of 138 Klebsiella producing ESBLs but nonproducing AmpC. The genotypes of AmpC were identified by PCR. Results All AmpC?

采用Vitek 60型和Vitek 32型、纸片扩散法测定42株产AmpC酶同时产ESBLs克雷伯菌的药敏结果，并与24株产AmpC酶但不产ESBLs克雷伯菌和138株不产AmpC酶但产ESBLs的克雷伯菌药敏结果对比分析；采用PCR分析产AmpC酶但不产ESBLs肺炎克雷伯菌的AmpC基因型。

The effective isolate 2507 producing antibiotic controlling oomycetes was first isolated from the soil samples.

本研究首先是进行有效菌株分离筛选工作，首次从世界各地采集的土样中分离筛选菌株，抗生素生产菌株2507可以防治植物卵菌病害。

Ramets reproduced by ortets that grew in low concentration of Pb (below the tolerance threshold value) could grow in both the healthy habitat and low concentration of Pb habitat in linearity pattern. However, ramets didn''t survive in high concentration of Pb but grew in healthy habitat in phalanx pattern and the ortet grew in high concentration of Pb survived because of the ramets feedback.

在铅耐受范围中生长的源株子代能在所有生境中以比较松散的线状类型生长，但超过了阈值的高浓度铅污染生境中，植株子株不能生存，而在健康生境中形成密集型格局，并&回哺&源株，使其能勉强生存。

In my home community, you can see two trees, one is osmanthus trees, and there is also an osmanthus trees.

在我家的社区里，可以看到两株树，一株是桂花树，还有一株也是桂花树。

DGGE result showed that As-I1-3 was dominant in arsenite enriched community, followed by isolate As-I1-5 (Halomonas meridiana,100%) and Mn-I1-6 (Marinobacter vinifirmus, 99%). 16S rDNA library analysis reconfirmed the result of DGGE, which showed that the three bacteria occupied 72.5%, 10% and 7.5% of the total OTUs, respectively.

DGGE分析显示，该菌是富集物中的最优势菌，其次是盐单胞菌和海杆菌。16S rDNA 克隆文库分析结果进一步证明，与菌株AS-I1-3序列相同的克隆子占整个克隆文库的72.5%；而与菌株AS-I1-5 (Halomonas meridiana， 100%)和菌株Mn-I1-6（Marinobacter vinifirmus，99%）序相同的克隆子分别占10%和7.5%。

In this paper, 1554 strains of bacteria were isolated from the soybean rhizophere in the different continuous systems. Those biocontrol bacteria were screened in vitro and in vivo. 6 strains of them had the better control efficacy. They exhibited the different antagonism to the pathogens of soybean root in vitro. The strains 18BR2-2 and 18BR9-1 showed a wide range of antagonism against Fusarium oxysporum, F. avenaoeum, F. solani and Rhizoctonia solani in vitro. The 6 strains exhibited different control efficacy to soybean root rot in greenhouse and in field. In greenhouse, they could decrease the degree of soybean disease significantly, and the control efficacy of 18BR2-2 was the best and can reach 45.90%. In theory, soybean treated by 18BR2-2 may postpone the days of outbreaking of disease for 6 days. The strain 18BR2-2 also promoted the growth of soybean seedling and, raising the soybean height for 11.24%, increasing dry weight for 40.91% and fresh weight for 35.27%.

本研究从长期连作田种植的大豆及其根际土壤中分离细菌1554株，采用平板测试、温室盆栽及田间试验等方法，筛选了对大豆根腐病菌(主要是尖孢镰孢菌Fusarium oxysporum)有很好作用效果的生防细菌6株，在离体的条件下均表现出不同程度的拮抗作用，其中生防细菌18BR2-2和18BR9-1表现出很广的杀菌谱，对大豆根腐病菌尖孢镰孢菌(F.oxysporum)、燕麦镰孢菌(F.avenaoeum)、茄腐镰孢菌和立枯丝核菌都有很好的离体拮抗作用，并且这6株生防细菌在盆栽和田间的情况下均表现出对大豆根腐病一定的防治效果。

By inoculated to tobacco plants, six strains could be re-isolated from the inoculated plants, indicating that they were endophytic bacteria in tobacco. Culture these eight bacteria and Phytophthora parasitica var. nicotianae together, the result showed four endophytic bacteria YN-55, NN-3, YN-4 and YN-10 have the best antagonistic effects.

将这8株内生细菌与烟草黑胫病菌共培，进一步测定拮抗效果结果显示YN-55、NN-3、YN-4和YN-10 4株拮抗效果最好，均在66％以上，并且这4种细菌均对孢子囊的产生有较强的抑制作用，而菌株发酵液对孢子囊的产生的抑制作用不明显。

After assaying the sequence of 28S and sequence alignment,it was found that the similarity of four strain of P.herbarum with that of high pathogenic strain was over 98%,thus confirming from molecular level that strain belonged to Phoma herbarum.

通过测定菌株28SrDNA序列并进行序列比对，有4个草茎点霉菌序列与01菌株的相似性达98%以上，从分子水平进一步证实01菌株为草茎点霉。

In addition, the 8 genes in every strain of isolates were not the same sub-lineague in the phylogenic trees, indicating that they might be the products of natural reassortment occurring among different sub-lineages.

所分离毒株中每个毒株的8个基因，在遗传进化树上的分支不具有统一性，说明此3个毒株可能为不同基因亚系间发生自然重排的产物。

Over 521 strains were screened for phytase production from 30 kinds of soil samples.

从土壤中分离的500多个菌株中筛选出一株产植酸酶活力较高的菌株LW03，经形态学观察和生化试验，初步鉴定为根霉，属于米根霉组。

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。