A suspension of bacteria in a thin channel or film subject to a gradient in the concentration of a chemoattractant, will develop, in the absence of an imposed fluid flow, a steady bacteria concentration field that depends exponentially on cross-stream position. Above a critical bacteria concentration, this quiescent base state is unstable to a steady convective motion driven by the active stres...

background: sustainable and commercial production of secondary metabolites is a critical issue when dealing with its clinical application. efforts are still being made to look for biotic or abiotic elicitors with more efficient and universal effects on the improvement of secondary metabolites. objective: in order to evaluate the suitability of different biotic elicitors on p. harmala l. cell su...

The toxic effect of nanoscale zero valent iron (nZVI) particles on bacteria from different growth phases was studied. Four bacterial strains namely Escherichia coli strains JM109 and BW25113, and Pseudomonas putida strains KT2440 and F1 were experimented. The growth curves of these strains were determined. Bacterial cells were harvested based on the predetermined time points, and exposed to nZV...

We make use of hydrodynamical simulations of the intergalactic medium (IGM) to create model quasar absorption spectra. We compare these model spectra with the observed Keck spectra of three z > 6.2 quasars with full Gunn-Peterson troughs: SDSS J1148+5251 (z = 6.42), SDSS J1030+0524 (z = 6.28), and SDSS J1623+3112 (z = 6.22). We fit the probability density distributions (PDFs) of the observed Ly...

CANADA, JAMES C. (University of Wisconsin, Madison), AND DOROTHY H. STRONG. Effect of animal alimentary passage on the heat resistance of Clostridium perfringens. Appl. Microbiol. 13:788-792. 1965.-The resistance to heat, as measured by D values and phantom thermal death time curves, was observed to increase for one of three strains of Clostridium perfringens type A subsequent to animal passage...

BACKGROUND Staphylococcal protein A (SPA) is a protein of Staphylococcus aureus. Up to now, there have been many studies on the biological activities of SPA. Some reported effects of SPA pretreatment on septic shock in mouse models but there is no study which reports the role of SPA pretreatment on the infected incision. METHODS According to count results, bacterial suspension was set at a de...

Background: Sustainable and commercial production of secondary metabolites is a critical issue when dealing with its clinical application. Efforts are still being made to look for biotic or abiotic elicitors with more efficient and universal effects on the improvement of secondary metabolites. Objective: In order to evaluate the suitability of different biotic elicitors on P. harmala L. cell...

The commonly practiced removal of granulation tissue during periodontal surgery, aiming to eliminate infection and optimize healing conditions, may also remove progenitor stem cells that could otherwise support periodontal regeneration. The present study aimed to investigate if cells with embryonic stem cell properties are present in periodontal granulation tissue. During the course of flap sur...

This Application Note describes an alternative process for bacterial cell counting using on-chip fl ow cytometry with the Agilent 2100 Bioanalyzer system. This procedure is described with three different kinds of prokaryotes: Escherichia coli (gram-negative, rod-shaped), Pseudomonas aeruginosa (gram-negative, rod-shaped), and Staphylococcus aureus (gram-positive, coccal). As a reference for bac...