株

Using Sarcina lutea as original strain,a ethionine and zinc chloride-resistant mutant was screened after treated with UV.

通过对谷胱甘肽新产生菌———藤黄八叠球菌进行紫外诱变处理，筛选到一株抗乙硫氨酸和氯化锌的抗性菌株，该突变株发酵生产谷胱甘肽的产量比出发菌株提高268.9%。

102 phenotypic features of 16 strains isolated from Sesbania ,growing in dry hot valley region of panzhihua,were analyzed.13 reference strains were included for comparison.The result showed that there were great diversities among strains in carbon and nitrogen nutrient utilization,resistance to antibiotics,endurance to salt.

选用分离自攀枝花干热河谷地区的田菁根瘤菌未知菌16株和13株参比菌株，进行了102项表型性状测定，结果表明：供试根瘤菌株在碳氮源利用、抗生素敏感性、抗逆性等方面存在着差异。

The sterile and fertile plants of BC3 generation, derived from the hybridization between sterile line and restorer line and maintaining line, were detected by GISH-dcFISH. The observations showed that the fertile plants were all the Brassica napus-Xinjiang wild Sinapis arvensis monosomic alien addition lines, and the sterile plants had no Sinapis arvensis chromosome.

不育系分别与保持系、恢复系Nsa恢1、保持系杂交后获得了BC3代不育株及可育株，GISH-dcFISH分析结果表明，BC3代可育株为甘蓝型油菜－新疆野生油菜单体异附加系，而不育株中不含新疆野生油菜染色体。

The open reading frame of Spinacia oleracea Betaine Aldehyde Dehydrogenase was retrieved from Spinacia oleracea and inserted into the Agrobacterium tumefaciens binary vector pBin438, which was driven by CaMV35S promoter, and produced the new binary vector pBSB. A. tumefaciens LBA4404 carrying this plasmid was used in genetic transformation of plants. Forty-five primary transgenic plants were detected by PCR and verified by the Southern blotting from 65 regenerated plants, of which 27 transgenic plants had only one copy of T-DNA.

摘 要：分离出菠菜甜菜碱醛脱氢酶基因构建成由CaMV35S驱动的双元植物表达载体pBSB，农杆菌菌株LBA4404携带该载体转化棉花，获得转基因棉花植株。65株转基因植株经过PCR筛选、Southern blotting分析证明有45株为成功的转化株，外源基因已经被整合到棉花的染色体组中，并以单拷贝插入居多。

Objective To establish a sensitive and specific gene probe method for detection of Staphylococcal enterotoxin B gene.

目的 建立一种灵敏度高、特异性好的DNA 探针检测葡萄球菌肠毒素B 基因方法。方法用聚合酶链反应扩增的方法进行葡萄球菌B 型肠毒素基因探针生物素标记，用制备好的基因探针，进行斑点杂交，对葡萄球菌肠毒素10 株标准株和39 株临床株分别进行了检测。

Ansochromogenes was transformed by pUC1169 from itself. 8 mutants lost ability to produce nikkomycin were screened from 4068 colonies of Vio〓 Thio〓 with Tn4560 transposition. Southern blotting suggested that Tn4560 was inserted in at least 4 positions of chromosomal DNA in S.

于39℃，MM／Vio条件下培养携带有pUC1169的7100孢子，Tn4560发生转座；筛选到4068个转座菌落，并从中得到8株尼可霉素阻断突变株；对这8株突变株的总DNA进行Southern杂交分析表明，Tn4560至少在4个不同的位点插入到7100的染色体上。

To determine the regulating role of mtlR in transcription of mannitol PTS operon in V.cholerae,and whether it plays a role in the ferment difference of the toxigenic and non-toxigenic strains,the mtlR deletion mutants from the mannitol rapid-ferment strain(non-toxigenic strain) and slow-ferment strain were constructed.Comparisons of the growth in M9 containing 0.2% mannitol as the sole carbon source and pH change in mannitol fermentation media of these wild strains and their mutants,indicated that mtlR is a repressor.Its repression in mtlCBA transcription was further verified with the analyses of quantitative reverse-transcriptional PCR.

通过比较快发酵菌株和慢发酵菌株mtlR缺失突变株与野生株在含0.2%甘露醇的M9培养液及甘露醇发酵液中生长、产酸等的变化，定性地证明了mtlR基因的抑制作用；另外通过定量RT-PCR进一步验证了MtlR蛋白在mtlCBA转录水平发挥负调控作用。

Were dermatophytes (92.19%), 57 were Trichophyton rubrum (89.06%);5 yeast (7.81%), Candida albicans was the most; mold and mixed fungal infection were never isolated.

共分离出致病真菌64株，皮肤癣菌59株(92.19%)，其中红色毛癣菌57株(89.06%)；酵母菌5株(7.81%)，白念珠菌最常见。

Results 336strains of pathogenic bacteria were separated from the urine sample of2865cases and the detectable rate was11.73%of the336separated strains the number of strains of gram negative bacilli was226,the gram positive cocci is92and the fungi is18.the positive rate of escherichia coli was the highest followed by co-agulase negative staphylococci,klebsiella pneumoniae and blue verditer pseudomonas.highest resistance to penicillins and cephalosporins was obsered.

结果 从2865份尿标本中分离出336株病原菌，检出率为11.73%。其中革兰阴性杆菌226株，革兰阳性球菌92株，真菌18株。阳性率最高的是大肠埃希菌，其次是凝固酶阴性葡萄球菌、克雷伯菌、铜绿假单胞菌。药敏结果对青霉素类、头孢类抗生素的耐药率较高。

Results showed 172 DH plants in 2006, 230 DH plants in 2007 were obtained, 275 plants had been domesticated in 2008.Some DH regeneration plants could transform into leaf mutants. From 2006 to 2007, 8 wrinkledness leaf mutants were gotten. The highest rate of getting mutants was 2.29 %. 2 mutant plants had gotten seeds. The leaf mutants mainly showed wrinkledness in the surface of preceding leaves at early stage. Then the wrinkle leaves could transfer to normal ones and some also keep the wrinkledness later with their growth.

结果表明，CGMCC№2553具有胚胎发生能力，2006年获得172株DH再生植株，2007年获得230株，2008年驯化275株；定植到日光温室中的DH再生植株有些会转变为叶片突变体，2006~2007年共获得8株叶片皱缩突变体，最高获得率为2.29%；目前已获得2份突变体的自交种子；叶片突变体主要表现：生长初期叶片表面皱缩呈瘤状，随着生长的进行，一些皱缩的叶片转变为正常，有的则依然皱缩。

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。