株

Inan attempt to select more efficient biocatalysts ,the hydantoinase and carbamylase genes fromBurkholderia pickettii were cloned in Escherichia coli, achieve a co-experssed strains. The geneswere assembled to give the carbamylase gene preceding the hydantoinase gene. The recombinantstrains stably and constitutively produced the two enzymes and efficiently converted thecorresponding hydantoins onto p-hydroxyphenylglycine and phenylglycine .

我们试着寻找更快更有效的转化菌株，把来源于皮氏伯克霍尔德氏菌的表达该两种酶的两个基因同时克隆到大肠杆菌中，获得共表达两种酶的基因工程菌株，两个基因的顺序是 Dcase 基因在 Dhase 基因的前面，同一个启动子。

To scientifically control and prevent Newcastle disease,this study researched the molecular evolution characteristics of Phosphoprotein gene of Newcastle disease viruses.

对1997~2007年国内分离的13个NDV毒株的P基因进行扩增测序，与15个已发表的国内外不同时期的NDV毒株P基因进行核苷酸和推导的氨基酸遗传变异分析及分子特性研究。

The major gene of CTXΦ receptor Tcp (toxin-coregulated pilus), tcpA, was detected by polymerase chain reaction analysis.

然而在本实验室研究中，于不含ctxAB基因的El Tor型霍乱弧菌中发现部分菌株含有RS基因同源序列，为此对这些菌株作CTXΦ基因组的进一步研究。

Furthermore, pistillate trees entered the dormant phase earlier than staminate ones.

而且，雌株进入各个休眠阶段的时间都比雄株早。

To make comparison of adaptability of the plastid-less mutant and the wild type strain, we studied their growth characters under different culture conditions, found that the difference of their growth in a medium rich in organic substances are hardly detectable and that the loss of plastid exerts only a weak effect, if any, on the heterotrophic growth.

为比较完全失去质体结构的突变株和野生型的适应力，我们对二者在不同条件下的生长特性进行了研究，结果发现野生型与突变株的生长在有机质丰富的培养液中差别微弱，质体的丢失并不产生显著影响。

Losing competence might affect their β-lactam resistance, and the consequences were different in different strains.4. To further understanding when and where pneumococci formed transformation in vivo so as to study the influence of pneumococcal transformation to its virulence, we constructed a pneumococcus 22G itstransformation forming could be reported by EGFP.

肺炎链球菌的感受态形成可诱导ciaH和cpoA的表达增加，其感受态缺陷影响到其对β-内酰胺类抗生素的敏感性，但不同菌株影响的结果不同。4、为进一步了解肺炎链球菌在宿主体内转化发生的情况，便于深入研究体内细菌转化对其毒力形成的影响，本研究构建了绿色荧光报告细菌转化发生的肺炎链球菌菌株22G。

Isolates from different geographic areas and even some isolates in the same area showed considerable amount of DNA polymorph ism.

不同地区的分离株甚至同一地区的某些分离株存在相当大的DNA多态性。

The research was performed to select certain typical bacterial strain as the vaccine strain to produce polyvalent inactivity vaccine for the local prevention and counterchecking of the disease on the basis of the separation and identification of streptococcosis suis, in the southern part of Xinyang region of Henan Province.

本研究是在对信阳地区猪链球菌病病原分离、鉴定的基础上，挑选具有一定代表性的菌株作为疫苗株，研制多价灭活疫苗用于本地区该病的免疫防制。

A primrose by a river's brim, a yellow primrose was to him, and it was nothing more.

河床边那株报春花，对他而言就是一株淡黄的报春花，不可能是其他东西。

Using TaKaRa LA PCR? in vitro Clonging Kit, a 2.3kb DNA fragment from the mutant was amplified and identified. Sequence analysis indicated that the fragment was composed of a complete proE gene and a partial proA gene.

根据枯草芽孢杆菌93151野生菌株proB基因的序列设计并合成引物，利用TaKaRa LA PCR~ in vitro Clonging Kit试剂盒，克隆突变菌株的proBA基因，得到一个约2.3kb的DNA片段，序列分析表明该片段包含一个完整的proB基因和不完整的proA基因。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。