conclusions: e. coli herb-resistance plasmid can replicate and be expressed in s. aureus. results: the identified 45 kb herb-resistance plasmid could be transferred from e. coli cp9 isolates to e. coli dh5α. as a consequence e. coli dh5α transconjugant mic increased from 0.0125 g/ml to 0.25 g/ml. the plasmid was easily transferred from e. coli cp9 strain to s. aureus rn450rf with a mean transfe...

isolated impacted supernumerary teeth are quite rare, but they can be seen associated with several syndromes such as cleidocranial dysostosis or gardner's syndrome. this article aims to discuss a case of sequential formation of supernumerary teeth with no other associated disease or syndrome. a 17-year-old iranian male with 8 impacted supernumerary teeth was referred to the department of pediat...

antibiotic resistance pattern of salmonella and e. coli isolated from chickens against several antibiotics was determined. a total of 150 samples from chickens were isolated and identified using various enrichment and special media. disc diffusion antibiotic susceptibility test was performed and mic and mbc of doxycycline were also determined using serial dilution method. sixty nine bacterial i...

A series of mutant strains of Lactobacillus fermenti resistant to the growth inhibitory properties of amprolium were isolated by serial transfers of the original strain in media which contained increasing concentrations of amprolium. Using three different resistance levels of strains (resistant strain A, B and C), the mechanism of amprolium resistance was investigated. Through the present studi...

HEV’s energy control strategy cannot be regulated perfectly according to the variable working condition, because the driving resistance is difficult to measure and calculate during the driving process. By taking parallel-serial HEV which power coupling mechanism is planet-gear as research object, analyzed planet-gear power coupling mechanism’s dynamics characteristic and efficiency characterist...

Nitazoxanide and its primary metabolite, tizoxanide, inhibit hepatitis C virus (HCV) replication in HCV replicon systems. To study the potential for resistance, we subjected Huh7 cells harboring HCV replicons to serial passage in 250 muM G418 and increasing concentrations of nitazoxanide or tizoxanide. Passage of the replicon-containing cell lines in either compound resulted in increases in the...