Restoration of growth phenotypes of Escherichia coli DH5alpha in minimal media through reversal of a point mutation in purB.

Relationship of cell surface hydrophobicity with biofilm formation and growth rate: A study on Pseudomonas aeruginosa, Staphylococcus aureus, and Escherichia coli

Objective(s): This study was designed to determine the relationship of Pseudomonas aeruginosa, Staphylococcus aureus, and Escherichia coli isolates in multispecies biofilms and their individual phenotypic characters in biofilm consortia. Materials and Methods:  The subject isolates were recovered from different food samples and identified on the basis of growth on differential and selective med...

ارزیابی کفایت محیط‏های غنی‏کننده هم‏زمان به منظور بازیافت استافیلوکوکوس اورئوس، لیستریا منوسایتوژنز و اشریشیاکلی انتروهموراژیک

Background and Objective: Due to low quantity of pathogens in foods, designing a broth medium to enrich simultaneously several pathogens through a suitable time to a detectable level is one of point of interest of many microbiologists. This study aimed to enrich simultaneously three food-borne pathogens (Listeria monocytogenes, Staphylococcus aureus and Enterohaemorrhagic Escherichia co...

media and specific growth rate selection for high-cell-density cultivation of recombinant escherichia coli producing hGM-CSF in fed-batch process

Separate regulation of purA and purB loci of Escherichia coli K-12.

We isolated a strain of Escherichia coli K-12 in which the lac structural genes are fused to the purB control region and used this strain to study the regulation of the purA and purB loci. The purA locus was derepressed in response to either limiting adenine or guanine growth conditions in the presence of excess guanine or adenine, respectively. The presence of hypoxanthine in the culture mediu...

Effect of Monolaurin Alone and in Combination with EDTA on Viability of Escherichia coli and Staphylococcus aureus in Culture Media and Iranian White Cheese

Background: Escherichia coli and Staphylococcus aureus as important food-borne pathogens are the main concerns of food producers and consumers which create a lot of problems worldwide. The objective of this study was to investigate the inhibitory effect of monolaurin alone and in combination with EDTA on viability of E. coli and S. aureus in culture media and Iranian white cheese. Methods: Th...