The Journal of applied bacteriology最新文献_第9页

Adaptation of a strain of Spirulina platensis to grow in cobalt- and iodine-enriched media. 一株螺旋藻在富钴和富碘培养基中生长的适应性。

The Journal of applied bacteriology Pub Date : 1994-02-01 DOI: 10.1111/j.1365-2672.1994.tb01610.x

Y Singh, H D Kumar

{"title":"Adaptation of a strain of Spirulina platensis to grow in cobalt- and iodine-enriched media.","authors":"Y Singh, H D Kumar","doi":"10.1111/j.1365-2672.1994.tb01610.x","DOIUrl":"https://doi.org/10.1111/j.1365-2672.1994.tb01610.x","url":null,"abstract":"Cobalt- and iodide-enriched (adapted, tolerant) strains of the protein-rich cyanobacterium, Spirulina platensis, were produced by repeated sub-culturing in increasing concentrations of the two trace elements. The strains enriched with cobalt and iodide showed higher uptake of these elements than the controls. The LD50 values for the parent and cobalt-adapted strains were 95 and 231 mumol l-1 CO2+, respectively. Likewise, the LD50 values for parent and iodide-adapted strains were 12 and 42 mmol l-1 I-. The carotenoid:chlorophyll a ratio of the parent strains increased after cobalt addition. The cobalt-adapted strain showed a much higher ratio than the cobalt-grown parent (sensitive) cells which remained unchanged after cobalt addition. Intracellular CO2+ uptake by the cells was concentration-dependent and followed Michaelis-Menten kinetics with saturation in uptake occurring in the parent and adapted strains at 126 and 189 mumol l-1 Co2+, respectively. At saturating concentrations, the maximum CO2+ uptake was 39.73 and 158.43 nmol CO2+ mg-1 protein, respectively for the parent and adapted strains. The adapted strain also showed greater cobalt adsorption. The Km of intracellular CO2+ uptake was lower in the case of adapted cells as compared with the parent, whereas Vmax showed an opposite trend. Thus, the adapted cells appear to be more efficient than the parent strain in intracellular uptake of cobalt. Differences between kinetic constants of both the strains suggest that the strains may be physiologically different. Likewise, iodide uptake was significantly higher in iodide-adapted cells than in controls.","PeriodicalId":22599,"journal":{"name":"The Journal of applied bacteriology","volume":"76 2","pages":"149-54"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/j.1365-2672.1994.tb01610.x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19135805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Storage of poultry meat under modified atmospheres or vacuum packs: possible role of microbial metabolites as indicator of spoilage. 禽肉在改良空气或真空包装下的储存:微生物代谢物作为腐败指标的可能作用。

The Journal of applied bacteriology Pub Date : 1994-02-01 DOI: 10.1111/j.1365-2672.1994.tb01612.x

A Kakouri, G J Nychas

引用次数: 109

Isolation from food sources, of lactic acid bacteria that produced antimicrobials. 从食物中分离出产生抗菌剂的乳酸菌。

The Journal of applied bacteriology Pub Date : 1994-02-01 DOI: 10.1111/j.1365-2672.1994.tb01606.x

E E Vaughan, E Caplice, R Looney, N O'Rourke, H Coveney, C Daly, G F Fitzgerald

引用次数: 57

Society for Applied Bacteriology. 63rd annual meeting and summer conference. Edinburgh, 13-15 July 1994. Abstracts. 应用细菌学学会。第63届年会及夏季会议。爱丁堡，1994年7月13日至15日。摘要。

The Journal of applied bacteriology Pub Date : 1994-01-01

引用次数: 0

Formation of vitamins by pure cultures of tempe moulds and bacteria during the tempe solid substrate fermentation. 豆豉固体基质发酵过程中豆豉霉菌和细菌纯培养物形成的维生素。

The Journal of applied bacteriology Pub Date : 1993-11-01 DOI: 10.1111/j.1365-2672.1993.tb02798.x

S Keuth, B Bisping

{"title":"Formation of vitamins by pure cultures of tempe moulds and bacteria during the tempe solid substrate fermentation.","authors":"S Keuth, B Bisping","doi":"10.1111/j.1365-2672.1993.tb02798.x","DOIUrl":"10.1111/j.1365-2672.1993.tb02798.x","url":null,"abstract":"The formation of water soluble vitamins (vitamin B12, vitamin B6, riboflavin, thiamine, nicotinic acid and nicotinamide) during the tempe solid substrate fermentation was investigated. The role of several strains of Rhizopus oligosporus, R. arrhizus, and R. stolonifer and the role of several bacteria in the vitamin formation process were checked. All fungal and bacterial strains were isolated from Indonesian tempe and soaking water samples. The Rhizopus strains formed riboflavin, nicotinic acid, nicotinamide and vitamin B6. The final concentrations of these substances depended on the different strains involved and on the fermentation time. Isolates of R. oligosporus were generally the best vitamin formers. The moulds did not produce physiologically active vitamin B12. The thiamine content decreased during fermentation. The addition of bacteria, which had been selected in a screening for vitamin B12 production, resulted in an increase of physiologically active vitamin B12. Citrobacter freundii and Klebsiella pneumoniae showed the best formation capabilities. Furthermore, the bacteria produced riboflavin and vitamin B6 in addition to the moulds. The influence of Rhizopus on the vitamin B12 formation of Cit. freundii was also investigated. The vitamin content of tempe that was fermented with the mould and the bacterium was three times as high as a control fermentation with Cit. freundii only.","PeriodicalId":22599,"journal":{"name":"The Journal of applied bacteriology","volume":"75 5","pages":"427-34"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/j.1365-2672.1993.tb02798.x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19288874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 74

Characterization of Salmonella virchow phage types by plasmid profile and IS200 distribution. 利用质粒谱和IS200分布鉴定病毒沙门氏菌噬菌体类型。

The Journal of applied bacteriology Pub Date : 1993-11-01 DOI: 10.1111/j.1365-2672.1993.tb02799.x

E Torre, E J Threlfall, M D Hampton, L R Ward, I Gibert, B Rowe

引用次数: 24

Phenotypic identification of the genus Enterococcus and differentiation of phylogenetically distinct enterococcal species and species groups. 肠球菌属的表型鉴定和系统发育上不同肠球菌种和种群的分化。

The Journal of applied bacteriology Pub Date : 1993-11-01 DOI: 10.1111/j.1365-2672.1993.tb02794.x

L A Devriese, B Pot, M D Collins

引用次数: 368

A study of the use of rapid methods for preservative efficacy testing of pharmaceuticals and cosmetics. 药品和化妆品保鲜效果快速检测方法的研究。

The Journal of applied bacteriology Pub Date : 1993-11-01 DOI: 10.1111/j.1365-2672.1993.tb02802.x

P Connolly, S F Bloomfield, S P Denyer

引用次数: 35

The development and assessment of DNA and oligonucleotide probes for the specific detection of Bacillus anthracis. 炭疽芽孢杆菌DNA和寡核苷酸特异性检测探针的研制与评价。

The Journal of applied bacteriology Pub Date : 1993-11-01 DOI: 10.1111/j.1365-2672.1993.tb02803.x

R A Hutson, C J Duggleby, J R Lowe, R J Manchee, P C Turnbull

引用次数: 27

Role of cell-binding in the antibacterial mechanism of lactoferricin B. 细胞结合在乳铁蛋白B抗菌机制中的作用。

The Journal of applied bacteriology Pub Date : 1993-11-01

W R Bellamy, H Wakabayashi, M Takase, K Kawase, S Shimamura, M Tomita

{"title":"Role of cell-binding in the antibacterial mechanism of lactoferricin B.","authors":"W R Bellamy, H Wakabayashi, M Takase, K Kawase, S Shimamura, M Tomita","doi":"","DOIUrl":"","url":null,"abstract":"The antibacterial cell-binding properties of lactoferricin B, a potent bactericidal peptide derived from bovine lactoferrin, were investigated for the first time. To facilitate measurements of binding the peptide was radiolabelled by reduction and treatment with iodo-[1-14C]acetamide. 14C-lactoferricin B bound rapidly to the surface of Escherichia coli and Bacillus subtilis. The rate of binding was consistent with the rapid rate of killing caused by this peptide. The extent of binding was reduced in the presence of Mg2+ or Ca2+ ions which act to reduce its antimicrobial effectiveness. The optimal pH for binding was strain-dependent and the killing effect was maximal near the optimal pH for cell binding with each strain tested. These observations indicate that direct interaction of lactoferricin B with the cell surface is necessary for its lethal effect. The number of peptide molecules bound (> 10(6) per cell) was more than would be expected for binding to specific protein receptors. Lactoferricin B inhibited bacterial uptake of 3H-proline with effectiveness similar to polymyxin B, a known membrane-disruptive agent. The cell-binding event appears to lead to a disruption of normal permeability functions of the cytoplasmic membrane.","PeriodicalId":22599,"journal":{"name":"The Journal of applied bacteriology","volume":"75 5","pages":"478-84"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19288879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0