نتایج جستجو برای: اشریشیاکلی k12
تعداد نتایج: 2847 فیلتر نتایج به سال:
Kaposi's sarcoma-associated herpesvirus (KSHV) is the causative agent of Kaposi's sarcoma (KS), and KSHV activation of mitogen-activated protein kinases (MAPKs) initiates a number of key pathogenic determinants of KS. Direct inhibition of signal transduction as a therapeutic approach presents several challenges, and a better understanding of KSHV-induced mechanisms regulating MAPK activation ma...
We have used gluconate-limited chemostats to study selective differences between isogenic strains of Escherichia coli K12 into which four naturally occurring alleles coding for allozymes of 6-phosphogluconate dehydrogenase (6PGD) had been transferred. The limit of detectability of selection with our procedures is a selection coefficient of 0.5%. In the normal E. coli K12 genetic background, all...
Osteosarcoma (OS) is the most common primary malignancy of bone. Mortality is determined by the presence of metastatic disease, but little is known regarding the biochemical events that drive metastases. Two murine OS cell lines, K7M2 and K12, are related but differ significantly in their metastatic potentials: K7M2 is highly metastatic whereas K12 displays much less metastatic potential. Using...
Escherichia coli has been used as an indicator of the fecal contamination of water and food, identifying potential health hazards. In this study, an E. coli-specific bacteriophage, T4, was used to detect E. coli bacteria. The T4 phage small outer capsid (SOC) protein was used to present green fluorescent protein (GFP), an easily detectable marker protein, on the phage capsid. To inactivate phag...
Acid mine drainage (AMD) is a highly toxic environment for most living organisms due to the presence of many lethal elements including arsenic (As). Thiomonas (Tm.) bacteria are found ubiquitously in AMD and can withstand these extreme conditions, in part because they are able to oxidize arsenite. In order to further improve our knowledge concerning the adaptive capacities of these bacteria, we...
Environmental and genetic factors affecting the in vitro spontaneous mutation frequencies to aminoglycoside resistance in Escherichia coli K12 were investigated. Spontaneous mutation frequencies to kanamycin resistance were at least 100 fold higher on modified Luria agar (L2) plates, when compared to results obtained in experiments carried out with Nutrient agar (NA) plates. In contrast to rifa...
We are grateful to Ellen MacKenzie, Gregory Jurkovich, and Frederick Rivara for providing access to the NSCOT data and to Jin Wang for her assistance in data preparation and analysis. We also thank Jim Heckman and Philipp Eisenhauer for suggestions about computations. All errors are ours. Dr. Basu acknowledges financial support from National Cancer Institute research grants RC4 CA155809 (PI Bas...
سابقه و هدف: بیماریهای منتقله توسط غذا از جمله عوامل تهدید کننده جامعه بشری هستند. در همین رابطه، اشریشیاکلی از جمله باکتریهای مهم عامل مسمومیت‌های غذایی به شمار میآید. هدف از این تحقیق، ارزیابی شیوع و بررسی مقاومت آنتی‌بیوتیکی اشریشیاکلی، در نمونه‌های مواد غذایی سنتی میباشد. روش بررسی: در طی این پژوهش، 100 نمونه ماده غذایی تهیه شده به روش سنتی، از نظر وجود اشریشیاکلی مورد آزمون قرار گرفت...
At first sight, “TRIANGLE” appears to be just another piece of learning software but it is much more than this, it is an experimental test-bed for examining motivational factors in computer based training. Such a multi-media application derives its power of attraction from the quality of the interface design and the multi-medial content. Used as a trial on a defined target group of K12-students...
An isolate of Aeromonas caviae 035 carried a 55.5 kb self-transferable plasmid. Transfer of the plasmid to Escherichia coli K12 resulted in the expression of a TEM-like beta-lactamase that was not expressed in parental A. caviae. The bla gene sequence was detectable by DNA hybridization and PCR amplification of the plasmid when extracted from parental A. caviae or from E. coli K12 transconjugan...
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