Provence Place Mats


A biofilm is a syntrophic community of microorganisms in which cells stick to each other and often also to a surface. These adherent cells become embedded within a slimy extracellular matrix that is composed of extracellular polymeric substances (EPSs). The cells within the biofilm produce the EPS components, which are typically a polymeric combination of extracellular polysaccharides, proteins, lipids and DNA. Because they have a three-dimensional structure and represent a community lifestyle for microorganisms, they have been metaphorically described as "cities for microbes". Biofilms may form on living (biotic) or non-living (abiotic) surfaces and can be common in natural, industrial, and hospital settings. They may constitute a microbiome or be a portion of it. The microbial cells growing in a biofilm are physiologically distinct from planktonic cells of the same organism, which, by contrast, are single cells that may float or swim in a liquid medium. Biofilms can form on the teeth of most animals as dental plaque, where they may cause tooth decay and gum disease. Microbes form a biofilm in response to a number of different factors, which may include cellular recognition of specific or non-specific attachment sites on a surface, nutritional cues, or in some cases, by exposure of planktonic cells to sub-inhibitory concentrations of antibiotics. A cell that switches to the biofilm mode of growth undergoes a phenotypic shift in behavior in which large suites of genes are differentially regulated. A biofilm may also be considered a hydrogel, which is a complex polymer that contains many times its dry weight in water. Biofilms are not just bacterial slime layers but biological systems; the bacteria organize themselves into a coordinated functional community. Biofilms can attach to a surface such as a tooth or rock, and may include a single species or a diverse group of microorganisms. Subpopulations of cells within the biofilm differentiate to perform various activities for motility, matrix production, and sporulation, supporting the overall success of the biofilm. The biofilm bacteria can share nutrients and are sheltered from harmful factors in the environment, such as desiccation, antibiotics, and a host body's immune system. A biofilm usually begins to form when a free-swimming, planktonic bacterium attaches to a surface.

Article title : Biofilm
"in or exposed to an aqueous solution, although they can form as floating mats on liquid surfaces and also on the surface of leaves, particularly in high..."
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"production personnel included head of production David Wessén, head of legal Mats Lindgren, head of media Madeleine Sinding-Larsen, and executive assistant..."
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"of 545 points, and set a record of five consecutive championships wins. Mat Fraser was born to Canadian Olympic figure skaters Don Fraser and Candace..."
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"vertical rolled-up wrestling mat. The body was discovered by fellow students who had climbed up to the top of a cluster of mats, which stood nearly 6 feet..."
Article title : Access mat
"mat, pipeline mats, may be considered construction mats, though they often begin as a different type of access mat. Pipeline mats are typically mats at..."
Article title : Empress Elisabeth of Austria
"with a gymnasium; the Knights' Hall of the Hofburg was converted into one, mats and balance beams were installed in her bedchamber so that she could practise..."
Article title : 1972 in the Vietnam War
"of the South. The USS Buchanan was hit by PAVN coastal artillery on Hon Mat Island near Vinh, killing one crewman.: 399  18 April Testifying before the..."
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"This is a list of events that took place in 2015 related to British television. The entire series of Call the Midwife was successful in the ratings this..."
Article title : Nikola Jokić
"help his team win 100–96 over Igokea. Although Mega Leks finished in 10th place in the Adriatic League, Jokić became one of the league's most valuable players..."
Article title : Hélène of Anjou
"others as Tanush Thopia. However, it is recorded that her marriage took place in 1338. Zavalani, Tajar (2015). History of Albania. Centre for Albanian..."

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Sunday 16 Feb 2025 17:24:20