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Coli and S.aureus , the experiment showed that recombined gene peptide has the antibacterialactivities.Conclusion The recombined gene antibacterial peptide was expressed successfully in the fusional pTYB vetor and the fusion gene peptide CA(1 ~8-MA(l ~12),CAM has the antibacterial activities to E. coli and S.aurens. While how to frame a more efficient expression system should be studied further , and its other biological activities are still to be tested.

本实验通过基因克隆方法拼接重组基因抗菌肽与融合表达载体pTYB12并在大肠杆菌中进行表达成功,抑菌活性的检测结果表明重抗菌肤的克隆表达与活性初步测定中文摘要组基因抗菌肤CA(1一8卜MA(1一12),cAM〕对大肠杆菌与金黄色葡萄球菌均有一定的抗菌活性,如何进一步提高抗菌肤的表达量和有关重组基因抗菌肤的生物学活性还有待于进一步研究。

Result3 strains of endophytic fungi had growth peak when the pH value was 6.5-7.5,and could grow within pH of 4.0-8.5. Their acid-alkali adaptability was strong,in which the P-3 adaptability was the strongest. P-1and P-2 had the stronger inhibition to the Bacillus subtilis,Escherichia coli and Staphylococcus aureus,and P-3 only had the little inhibition to Escherichia coli. The 3 endophytic fungi all had inhibitory effect on Podosphaera leucotrlcha,Alternaria mali,and Gymnosporangium yamadae Miyabe,in which,P-1 had the better inhibitory ability.

结果3株内生真菌在pH值6.5~7.5出现生长最高峰,在pH值4.0~8.5都可以生长,酸碱适应性很强,其中P-3的适应性最强。P-1和P-2对枯草芽孢杆菌、大肠杆菌、金黄色葡萄球菌都有较强的抑制能力,而P-3只对大肠杆菌有很微弱的抑制能力。3株内生真菌对苹果锈病病原菌、苹果白粉病病原菌、苹果落叶病病原菌都有抑制作用,其中P-1的抑制能力较强。

The multi-drug resistance rate of Salmonella and E.coli were 91.80% and 100%.According to the genes sequence published in Genbank ,we analysed the value of Tm ,content of G+C, oligonucleotide dimer by DNAStar and Primer 5.0 software, and according to the construction of I integron ,we designed 3 pairs of primers to amplify intIl gene ,variable segment ,3"-conserved segment for detectting Salmonella and E.coli"s I integron.As a result , aimed genes were amplified and sequenced;The detection rate of I integron of 61 Salmonella and 48 E.coli were 81.97% and 66.67%.

据文献报道及GenBank中注册的基因序列,运用DNAStar软件分析同源率及Primer5.0软件对Tm值、G+C含量、引物二聚体等进行分析,根据Ⅰ类整合子的结构设计了3对引物,对Ⅰ类整合子的intI1、可变区、3'保守端进行扩增,检测沙门氏菌和大肠杆菌Ⅰ类整合子;扩增出了相应基因片段并测序;61株沙门氏菌和48株大肠杆菌中分别有50株和32株菌检测出Ⅰ类整合子,Ⅰ类整合子的检测率分别为:81.97%和66.67%。

MBC value was 0.61, 0.304, and 0.00475 μgmL^(-1) respectively. Sterilization rate of ceftiofur suspension was the fastest to Actinobacillus, followed by Streptococcus. PAE of ceftiofur suspension was relatively short to E. coli, which illustrated that it was nonconcentration dependent. PAE was obvious longer to Actinobacillus, which showed that it was concentration dependent, however, it revealed part concentration dependent to streptococcus.

头孢噻呋混悬剂对大肠杆菌、放线杆菌及猪兽疫链球菌的MIC值分别为:0.076、0.304、0.00475μgmL^(-1);MBC值分别为:0.61、0.304、0.00475μgmL^(-1);头孢噻呋混悬剂对放线杆菌的杀菌速率最快,对链球菌次之;头孢噻呋混悬剂对大肠杆菌PAE较短,呈现非浓度依赖性,对放线杆菌的PAE较长,呈明显的浓度依赖性,而对猪兽疫链球菌呈现部分浓度依赖性。

MethodsThe D. bacteria - E. coli shuttle expression vector pZT17 was constructed based on plasmids of pUE30, pGBM5 and pKatCAT. Then pZT17 with lux+ from Photinus pyralis was used to transform into D. grandis and E.coli. The recombinant strains were induced separately.

以质粒pUE30、pGBM5及pKatCAT为基础,构建抗辐射菌属一大肠杆菌间的穿梭载体,将groEL启动子和荧光素酶基因lux+插入到构建的穿梭载体中得到穿梭表达载体,并将该载体转化大肠杆菌诱导荧光素酶基因的表达。

A complete bovine 18ku-bFGF gene was cloned by nested-PCR and subcloned into expression vector pET-28a.The recombinant plasmid pET-28a-bFGF was transformed into Escherichia coli BL21.At 25℃,recombinant protein was induced by 0.5mmol/L IPTG for 5 hours.Supernatant of cell lysate was purified using Ni-NTA method and the products was submitted to detect the bioactivity by Western-blotting,which indicated that the fusion protein contained recombinant bovine bFGF.Results showed that recombinant bovine bFGF was produced and solubly existed in the supernatant.NIH-3T3 fibroblasts were used to detect the bioactivity of the fusion protein.

采用巢式PCR方法克隆了牛18ku-bFGF基因完整的编码序列,并构建了原核表达载体pET-28a-bFGF,将其转化大肠杆菌BL21,在25℃低温条件下,用0.5mmol/L IPTG诱导表达5h,用Ni-NTA亲和纯化细胞裂解上清液,经Western-blotting检测,结果显示,在特定的诱导条件下,重组牛bFGF基因在大肠杆菌中获得了表达,并且主要以可溶性状态存在于细胞中。

Piglet edema were first discovered in Britain, is hemolytic E. coli intestinal toxemia, so capillaries or systemic damage to the small blood vessels, increasing permeability and fluid extravasation too much water, to the head, eyelids, Equality ear edema, acute ataxia and death as the main feature of acute infectious diseases, also known as gastrointestinal edema pigs or pig intestinal toxemia E. coli, a highly lethal disease.

仔猪水肿病最早发现于英国,是由溶血性大肠杆菌引起肠毒血症,而使全身毛细血管或小血管受到破坏,通透性增大,水液外渗过多,造成的以头部、眼睑、耳部等处水肿、共济失调和急性死亡为主要特征的急性传染病,又称猪胃肠水肿或猪大肠杆菌肠毒血症,有高度致死性疾病。

The gene of transglutaminase was amplified from the chromosome of Bacillus subtilis DB403 by PCR and translationally fused with thioredoxin gene in the plasmid pET32a to achieve the expression vector pET32-BTGase.

利用PCR技术,从枯草杆菌DB403染色体上扩增出谷氨酰胺转胺酶基因,将其克隆到大肠杆菌载体pET32a中,成功构建谷氨酰胺转胺酶表达载体pET32-BTGase,并转化大肠杆菌BL21 (DE3)。

Actually, some pessimists give E. coli 100-to-1 odds on outliving humans, even though E. coli can currently live only in our guts.

事实上,在大肠杆菌和人类谁更长寿的赌局上,许多悲观主义者给出大肠杆菌100比1的赔率,尽管现在,这种微不足道的生物只能生存在我们人类的身体里。

The rewards are identical, however. Both Homo sapiens and E. coli are elite cosurvivors. And neither particularly has an advantage over the other in surviving the next million years. Actually, some pessimists give E. coli 100-to-1 odds on outliving humans, even though E. coli can currently live only in our guts.

事实上,在大肠杆菌和人类谁更长寿的赌局上,许多悲观主义者给出大肠杆菌100比1的赔率,尽管现在,这种微不足道的生物只能生存在我们人类的身体里。

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呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

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