株

The results showed that 9 strains presented cytotoxic activities to at least one of the tested tumor cells, five strains exhibited strong antimicrobial activity against Staphylococcus aureus, one strain had inhibitory effect on Phytophthora parasitica.

结果显示，有9株内生真菌至少对一种指示瘤株具有细胞毒活性， 5株内生真菌对金黄色葡萄球菌有较强的抑菌活性， 1株内生真菌对辣椒疫霉有抑制作用。

From Chuxiong Shuangbai was the highest metalaxyl resistant isolate,and the lowest resistance isolate 218# come from Weishanof Dali. The EC50 of 34 Phytophthora parasitica var. nicotianae isolates against metalaxyl was 0.0148μg/ml in average, was in the range of 0~0.053μg/ml.

分离自楚雄双柏县雨龙乡的113#菌株抗药性最强，来自大理巍山县大仓镇的218#菌株抗药性最低。34株烟草黑胫病菌菌株对甲霜灵的EC50值平均为0.0148μg/ml，范围在0~0.053μg/ml。

Endophtic bacteria strains were isolated from healthy tobaccos from heavy disease plots in Yongzhou, Ningxiang and Liuyang. By Laboratory dual culture test, seventeen actinomycetes to Phytophthora parasitica var. nicotianae were screened.

同时在湖南永州、浏阳和宁乡等地发病重的田块采集健株共分离到内生细菌120株，经室内平皿对峙培养法测定，其中8株内生细菌菌株在室内有较强的拮抗作用。

Three infectious bronchitis virus isolates named as Q1, J2 and T3 were isolated from proventricular tissue taken from vaccinated chicken flocks in China The biological characteristics of the three isolates were observed.

中文题名传染性支气管炎致腺胃病变毒株变异的分子基础及我国和东南亚分离株的分子流行病学研究副题名外文题名 Molecular basis for variation of proventriculus pathogenic IBV isolates and molecular epidemiology of IBV isolates from China and southeast Asia 论文作者蒋贻海导师陈溥言教授学科专业预防兽医学研究领域\研究方向动物分子病毒学及免疫学学位级别博士学位授予单位南京农业大学学位授予日期2002 论文页码总数127页关键词鸡传染性支气管炎传染性支气管炎病毒腺胃毒株馆藏号BSLW /2003 /S855 /9 从我国接种过传染性支气管炎疫苗的幼鸡群的腺胃组织中分离得到三个传染性支气管炎毒株Q1、J2和T3，并对它们的部分生物学特性进行研究。

An amount of psychrophilic bacteria was isolated from deep sea sediment collected from Prydz Bay, Antarctica. The strain AC167, which showed high cold-active chitinase activity, was screened from these bacteria. It was identified as a Pseudomonas species by 16S rDNA sequence comparison.

从南极普里兹湾深海底泥样品中分离得到一批嗜冷细菌，对这些嗜冷细菌进行了产几丁质酶菌株的筛选，对其中一株具有较高产酶活性的菌株AC167所分泌的几丁质酶进行了性质分析，并通过16S rDNA序列分析进行了菌株的分子鉴定。

Strain LT6 exhibited significantly different antagonistic activities against different species of Pythium or different isolates of the same species.

腐霉菌株对由LT6产生的抗生素吩嗪-1-羧酸的敏感性存在变异，被测的54株腐霉，当PCA浓度为7.0μg/mL时，敏感的为28株，高抗的为15株。

Antibiotic susceptibility tests were carried out by K-B diffusion method on 41 vibrio strains isolated for one year both from farming seawater (18 strains) and digestion guts (23 strains) of the cobia, Rachycentron canadum . We chose 10 different species of antibiotics and refered to NCCLS performance standards for antimicrobial susceptibility testing, while taking Staphylococcus aureus ATCC25923 and Esсheriсhia coli ATCC25922 to control the test.

选用常用的10种抗生素，通过纸片扩散法（Kirby-Bauer纸片扩散法，简称K-B法），参照NCCLS抗生素敏感试验操作标准，并以金黄色葡萄球菌 Staphylococcus aureus ATCC25923和大肠埃希菌Esсheriсhia coli ATCC25922为质控菌株，对周年监测分离自养殖军曹鱼水体及肠道的41株优势弧菌（水体菌18株，肠道菌23株）进行了药物敏感性研究。

The results show ramet become reintegrated during periods of light limitation. Other ramets supply shaded ramets in resource.

这个结果与分株生存、生长的格局表明，光被限制期间，分株将重新整合，遮荫分株在无性系中由其它分株提供同化物。

To improve the nitrilase production,a strain of Rhodococcus rhodochrous was treated with UV radiation and LiCl,a mutant,tg1-A6,with higher nitrilase activity was obtained.

对实验室保存的1株产腈水解酶的Rhodococcus rhodochrous菌株采用氯化锂进行诱变处理，筛选得到了1株产酶活力较高的菌株tg1-A6。

With routine method, from having elected contents higher one RNA bacterial strain among several saccharomycetes, beer yeast, and the method with Shan factor experiment have studied an experiment being bacterial strain's turn to produce more proper RNA culture medium made up of , optimum the pH value fermenting and the best fermentation time.

本实验用常规方法从数株酵母菌中选出了一株RNA含量较高的菌株——啤酒酵母，并用单因素实验的方法研究了该菌株产RNA较适宜的培养基组成、最佳发酵pH值和最佳发酵时间。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。