نتایج جستجو برای: extracellular polymeric substance
تعداد نتایج: 349426 فیلتر نتایج به سال:
A cellular-automaton based two-dimensional biofilm detachment module is developed. The module is an improvement of previously presented methodologies for modeling biofilm detachment under the influence of hydrodynamic forces of the moving fluid in which biofilm develops. It uses biofilm mechanical properties that are variable in time and space and are determined by the percentage of each biofil...
according to the national institutes of health and the center for disease and prevention, it is estimated that 65 to 80 percent of the human infectious are caused by biofilms. antibiotics and drainage of purulent discharge are the main treatment measures. but in chronic infections sometimes these findings are not easy to recognize. biofilm is an extracellular polymeric conglomeration generally ...
This work shines light on the role of extracellular polymeric substance (EPS) in formation and preservation elemental sulfur biominerals produced by sulfur-oxidizing bacteria. We characterized particles within a Sulfurovum -rich biofilm Frasassi Cave System (Italy). The adopt spherical bipyramidal morphologies, display both stable (α-S 8 ) metastable (β-S crystal structures. Elemental is embedd...
The catchment (bedrock and soil) sediments of lake Bol?t?u, Romania were studied by high resolution multi-methodological investigations to characterize paleoenvironmental formation conditions. Particle size analyses, optical cathodoluminescence microscopy, FTIR-ATR Raman spectroscopy, X-ray powder diffraction, XRF applied for microtextural, chemical, micro-mineralogical embedded organic materia...
Borrelia burgdorferi, the causative agent of Lyme disease, has long been known to be capable of forming aggregates and colonies. It was recently demonstrated that Borrelia burgdorferi aggregate formation dramatically changes the in vitro response to hostile environments by this pathogen. In this study, we investigated the hypothesis that these aggregates are indeed biofilms, structures whose re...
The aim of this study was identification and characterization of highly efficient Extracellular Polymeric Substance (EPS) producing bacteria in activated sludge. Among 74 isolated bacteria, 20 EPS-producing bacteria were obtained from wastewater treatment plant of Bojnourd. EPS extraction was performed using absolute ethanol after glucose-enriched culture. Dry weight, concentration, and the rat...
A kinetic model is proposed to assess the feasibility of strategies for the removal of biofilms by using substances that induce detachment by affecting the cohesiveness of the matrix of extracellular polymeric substances (EPSs). The model uses a two-state description of the EPS (natural EPS and compromised EPS) to provide a unified representation of diverse mechanisms of action of detachment-pr...
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