منابع مشابه
Antibacterial action of spermine: effect on urinary tract pathogens.
The basic polyamine spermine was tested for antibacterial activity at two pH levels by the modified cup method against a variety of gram-positive and gram-negative organisms isolated from urine. At pH 6.4, with concentrations ranging from 39 to 2,500 mug per 0.1 ml, there were no clear zones of inhibition seen with any of the gram-negative test organisms, although some adverse effect on growth ...
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The mechanisms by which quinolones rapidly kill are ill defined. We have investigated the action of ciprofloxacin on Escherichia coli KL16 with a combination of traditional and flow cytometric methods and have analyzed cells for changes in membrane potential, membrane integrity, oxidative metabolism, morphology, and viability. Log-phase cultures were exposed to various concentrations (0.1, 1, 1...
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Polypyrrole-chitosan nanocomposite (PPy-CTN) was synthesized by dispersion polymerization of PPy in presence of CTN. Preparation of spherical PPy nanoparticles that were successfully covered with a thin layer of chitosan was confirm by transmission electron microscopy (TEM) technique. Characterization techniques also revealed the presence of CNT in the polymer matrix and its presence was confir...
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A permanent alternative is to re-site the fresh gas inflow to the back of the absorber where it has always been positioned in the past. With the elimination of the fresh gas flow error, it is found that respirometers placed at the catheter mount and in the circle give almost identical readings with spontaneous respiration. With controlled respiration there is over-reading of the circle respirom...
متن کاملEffect of oxidized spermine and other aldehydes on the infectivity of vaccinia virus.
The antiviral activity of oxidized spermine was compared with that of other aldehydes. Suspensions of vaccinia virus were incubated at 37 C with various concentrations of the aldehydes, and the infectivity of the viruses was determined by the plaque assay. Oxidized spermine at a concentration of 0.82 mM completely inactivated a suspension of vaccinia virus (1.4 x 10(8) plaque-forming units) aft...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1964
ISSN: 0022-1287
DOI: 10.1099/00221287-37-2-195