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The paper researched by 24 Saccharomyces cerevisiae strains and three kinds of related ascomycetous yeasts in the Angel Yeast Co.,L td,by electrophoresising and sequencing, ribosomal DNA ITS-1 sequences can analysis their's phylogenetic systematics relationship.

本论文以安琪酵母股份有限公司有代表性的酿酒酵母属中24株酿酒酵母及相关3种子囊菌酵母为研究对象，通过对所选取酵母菌株的核糖体DNA ITS-1序列进行电泳和克隆测序，分析出它们之间的系统学关系。

In addition ,an asporogenous mutant G5was obtained from Bs C3-41 wild strain ,in which the formation of the spore was blocked at the stage III of the sporulation course .

此外，还诱变筛选到一株稳定遗传的Bs无芽孢突变株G5，其芽孢形成阻断于第三期，能够形成晶体，二元素表达量较高，可作为后选的工程菌受体。

The results showed that:(1)IRBB21 was resistant to all the strains except T7147,astrain from Japan belonging to the Japanese racial group 2,whereas Minghui 63 and 6078 weremoderately susceptible to most of the strains tested;(2) The resistance reactions of the hybrids derivedfrom IRBB21 appeared to be the same as that of IRBB21,whereas that of the hybrids derived fromMinghui 63 and 6078 were more susceptible to BB than the two restorers.

结果表明，IRBB21除不抗日本的T2菌系群外，对所有其它供试菌株均表现高抗，恢复系明恢63和6078对供试菌株多为中感，以明恢63或6078配组的杂交稻的抗性极差，而源于IRBB21的杂交稻的抗性与IRBB21基本相同，因而证实Xa21基因确为在我国极具应用价值的抗性基因，完全可以用于杂交水稻的白叶枯病抗性改良。

There were 70 strains isolated from each of the MRS and VJ at the different stage of the processing of dried beef. Staphylococcus warneri, Staphylococcus sciuri, Staphylococcus auricularis, Bacillus subtilis, Staphylococcus xylosus, Staphylococcus saprophyticus, Lactobacillus plantarum and Pediococcus pentosaceus were 8 predominate bacteria. The growth curve of predominate bacteria was studied. The result showed that growth of Pediococcus pentosaceus was faster than that of Lactobacillus plantarum; the growth of Staphylococcus sciuri is fastest and Staphylococcus auricularis was slowest.

在牛肉自然发酵加工过程中的不同阶段，利用MRS和PCA~+培养基分离到乳酸菌和微球菌各70株，经过分析鉴定，得到8株优势菌，分别为沃氏葡萄球菌、松鼠葡萄球菌、耳氏葡萄球菌、木糖葡萄球菌、腐生葡萄球菌、枯草芽孢杆菌、植物乳杆菌和戊糖片球菌。

Through three-step continual EMS mutation, the adenine autotrophy strain(Ml-3) and the adenine-requiring revertant strain(M2-8) were screened successively, and the resistant strain(M3-20) to ammonium ion variant was further screened.

将MY-1经连续3次EMS诱变，依次选育富含核黄素的腺嘌呤营养缺陷型菌株(M1-3)和腺嘌呤缺陷型的回复突变株(M2-8)。

The difference of expressed proteins between Lai strain and its avirulent derivative were also studied.

此外，我们还研究了赖株及其无毒株的蛋白表达的差异，以期发现新的、重要的毒力因子。

It was demonstrated that HN and F protein of NDV were glycoproteins,and there were obvious differences between virulent and avirulent NDV,which could determine the virulence of NDV.

结果表明，NDV F和HN蛋白为糖蛋白，强弱毒株之间F蛋白裂解位点的氨基酸序列有明显的不同，并决定了毒株的毒力。

The inhibition rate of ANTI-8098A to the virulent strain was 0.158, 40.6% higher than that to the avirulent strain.

强致病力菌株达到0.158的抑制增长率，比无致病力菌株高40.6％。

Salina were obtained, and axenic status was confirmed by different methods.

经过不同方法检测，确证该5藻株属无菌藻株。

Eggs of axenic Bursaphelenchus xylophilus were kept on the colonies of various strains, and the results showed that on slanting cultures of certain strains, the eggs hatched, developed and reproduced well, i.e.

将无菌松材线虫卵置于各细菌菌株的菌苔培养的试验结果表明：无菌松材线虫卵能在某些斜面培养的细菌菌株的菌苔上孵化、生长、繁殖，即仅仅依靠细菌或其提供的营养，无菌松材线虫就能完成其生活史。

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。