نتایج جستجو برای: bacillus subtilis spores
تعداد نتایج: 65553 فیلتر نتایج به سال:
A composite material consisting of Bacillus subtilis spores suspended in a humidity sensitive hydrogel can be used to pattern biomolecules in different concentrations directly onto glass surfaces using a mechanical micromanipulator. By altering the relative humidity surrounding the composite gel during deposition, surface concentration of patterned biomolecules can be controlled and varied to c...
When nutrients are limited many prokaryotic and some eukaryotic cells tuck their chromosomes safely away in resistant spores. However, before starting the sporulation process, the prokaryote Bacillus subtilis wisely ensures that its chromosome is intact. In this issue of Cell, Bejerano-Sagie et al. (2006) describe a protein, DisA, that is responsible for the surveillance of chromosome integrity...
Dormant spores of a Bacillus subtilis mutant that lacks two major small, acid-soluble spore proteins are very sensitive to UV irradiation, which in spores generates about half the amount of thymine-containing dimers formed by comparable irradiation of vegetative cells. Irradiation of mutant spores also produces spore photoproducts, but again only about one-half the amount formed in comparably i...
Objective(s): Silver nanostructures have gathered remarkable attention due to their applications in diversefields. Researchers have recently demonstrated that bacterial spores are capable of reducing silver ions toelemental silver leading to formation of nanoparticles.Materials and Methods: In this study, spores of Bacillus subtilis and Geobacillus stearothermophilus wereemployed to produce sil...
BACKGROUND Bacillus spores are notoriously resistant to unfavorable conditions such as UV radiation, gamma-radiation, H2O2, desiccation, chemical disinfection, or starvation. Bacillus pumilus SAFR-032 survives standard decontamination procedures of the Jet Propulsion Lab spacecraft assembly facility, and both spores and vegetative cells of this strain exhibit elevated resistance to UV radiation...
Fleming, H. P. (University of Illinois, Urbana), and Z. John Ordal. Responses of Bacillus subtilis spores to ionic environments during sporulation and germination. J. Bacteriol. 88:1529-1537. 1964.-The ionic environments of germination and sporulation menstrua had a prominent influence on characteristics of Bacillus subtilis spores. There was a synergistic effect for l-alanine and inorganic ion...
Taylor, Martha J. (Fort Detrick, Frederick, Md.), and Curtis B. Thorne. Concurrent changes in transducing efficiency and content of transforming deoxyribonucleic acid in Bacillus subtilis bacteriophage SP-10. J. Bacteriol. 91:81-88. 1966.-Spores of Bacillus subtilis W-23-S(r) infected with transducing phage SP-10 served as convenient inocula for broth cultures from which transducing phage was h...
The purpose of this work was to obtain heat resistance data relevant to pasteurisation regimes and to model the effects of a range of temperatures (93 to 107°C) and pH (3.6 to 6.4) on the survival of the several Bacillus spp. spores that have been associated with spoilage of foods (Bacillus pumilus, B. licheniformis, B. subtilis, and B. megaterium), and to validate the results obtained by heati...
We report here the adaptation of our electronic microchip technology towards the development of a new method for detecting and enumerating bacterial cells and spores. This new approach is based on the immuno-localization of bacterial spores captured on a membrane filter microchip placed within a flow cell. A combination of microfluidic, optical, and software components enables the integration o...
Oxidative stress-induced damage, including 8-oxo-guanine and apurinic/apyrimidinic (AP) DNA lesions, were detected in dormant and outgrowing Bacillus subtilis spores lacking the AP endonucleases Nfo and ExoA. Spores of the Δnfo exoA strain exhibited slightly slowed germination and greatly slowed outgrowth that drastically slowed the spores' return to vegetative growth. A null mutation in the di...
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