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Topic: Slime layer


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In the News (Fri 19 Dec 14)

  
  Using the HMB IV to monitor and control biofilm in cooling tower applicaions.
Other circulating solids stick in the slime layer (including freely circulating bacteria) and are consumed.
By this action, bacteria and nutrient are "filtered" from the circulating waters by the successful slime, resulting in a low population density in circulation even when the system is badly fouled by the presence of biofilm.
Prevent the slime formers and the three prominent biological problems in cooling waters (heat exchanger fouling, MIC, and Legionella fears) are controlled.
www.biotechintl.com /hmbin.htm   (2301 words)

  
  Slime layer - Wikipedia, the free encyclopedia
A slime layer in bacteria is an easily removed, diffuse, unorganised layer of extracellular material that surrounds bacteria cells.
The function of the slime layer is to protect the bacteria cells from environmental dangers such as antibiotics and desiccation.
The slime layer also allows bacteria to adhere to smooth surfaces such as prosthetic medical devices and catheters.
en.wikipedia.org /wiki/Slime_layer   (185 words)

  
 Slime Mold Time
The slime mold fungi always elicit interest from gardeners and landscapers because they are so different from other fungi.
Slime molds are primitive organisms that flow (too slowly to watch) over low-lying objects (such as mulches, sidewalks, driveways) or vegetation (such as turfgrasses, strawberries, flowers, ground covers, weeds, and the base of woody plants).
Slime molds disappear with hot, dry weather, so we should expect this soon.
www.ag.uiuc.edu /cespubs/hyg/secure/subscribers/200112e.html   (460 words)

  
 Bacterial colonies   (Site not responding. Last check: 2007-11-05)
The organisms in the photograph are clustered together in an extracellular polysaccharide (slime) that they synthesized, and many of them are dividing so they are seen in pairs.
The region between the peptidoglycan and LPS layers is termed the periplasmic space (coloured grey in the figure); it is a fluid or gel-like zone containing many enzymes and nutrient-carrier proteins.
The crystal violet-iodine complex is easily lost through the LPS and thin peptidoglycan layer when the cells are treated with a solvent.
helios.bto.ed.ac.uk /bto/microbes/shape.htm   (933 words)

  
 Untitled
The bacterial cell envelope is composed of the glycocalyx, slime layer, or capsule; cell wall; and cell membrane.
If this layer is highly organized and firmly attached to the cell wall it is known as a capsule.
A slime layer is not highly organized and firmly attached to the cell.
facultyweb.maconstate.edu /mwomack/sur.htm   (1516 words)

  
 [No title]
Surrounding the cell wall is a slime layer which protects the bacteria and helps the cell stick on to things.
This slime layer is sometimes called a capsule.
The function of the plasmid is to produce substances which make the bacteria resist the chemicals in the slime layer of other bacteria and molds.
www.geocities.com /jw31645/bacter-n.html   (1439 words)

  
 Olympus MIC-D: Darkfield Gallery - Bacterial Capsules
Because of the physical characteristics of polysaccharides, the capsule is also known as the slime layer of the bacteria.
Some species of bacteria only excrete the slime layer, or capsule, under certain environmental and nutritional conditions, with the creation of a strong, prominent capsule associated with high concentrations of sugar.
Marine biologists are exploring differences in marine bacterial capsule formation in eutrophic upper water layers in contrast to much lower encapsulation rates found in bacteria from deeper, oligotrophic water layers.
www.olympusmicro.com /micd/galleries/darkfield/bacterialcapsules.html   (424 words)

  
 GWU BSOP - A Manual For Basic And Molecular Microbiology
The common feature of both types of cell walls is a layer that lies immediately next to the plasma membrane called the peptidoglycan or murein layer, a rigid structure composed of modified sugars and amino acids, that is primarily responsible for imparting strength to the cell wall.
This outer layer is superficially similar in structure to the plasma membrane.
Movement occurs either on a slime layer deposited by the cell or on small, rotating globular proteins which lie between the plasma membrane and the outer envelope and behave as microscopic ball-bearings.
www.gwu.edu /~cbs/lab/manual1/man1_3.html   (4052 words)

  
 Apollzygojustapyxie - Gamegrene - Ghyll
Whichever the case, the quality that differentiates an apollzygojustapyxie from a regular pyxie is the fact that it is entirely covered in a thick layer of slime.
The slime can vary infinitely in viscosity, opacity and hue and, although the shape of the apollzygojustapyxie can vary as widely as that of the regular pyxie, the fact that it is always covered in slime usually makes it easily distinguishable from most non-pyxie animals.
Snot slugs made from apollzygojustapyxie slime are known to cause that most unfortunate and peculiar of diseases, Zygotic Dermatosis.
www.gamegrene.com /wiki/Apollzygojustapyxie   (375 words)

  
 Microbiology terms - S
A diffused layer of polysaccharide exterior to the bacterial cell wall.
A nonphototrophic eukaryotic microorganism lacking cell walls, which aggregate to form fruiting structures (cellular slime molds) or simply masses of protoplasm (acellular slime molds).
If all the rigid wall layer has been completely lost, the structure is called protoplast.
library.thinkquest.org /3564/glossary/s.htm   (1033 words)

  
 Discovery of where cholera bacteria hides: 4/99   (Site not responding. Last check: 2007-11-05)
The researchers have discovered evidence that the bacterium hunkers down within a durable slime layer, known as a biofilm, that is resistant to the chlorine used to disinfect municipal water systems.
But the basis for this elusiveness remained a mystery, Yildiz said, until she and Schoolnik discovered that the rugose colonies extrude a protective slime composed of polysaccharides, or long chains of sugar molecules.
But snug within their slime, rugose colonies withstood chlorine concentrations 10 to 20 times higher than those found in water treatment facilities.
www.stanford.edu /group/news/report/news/1999/april21/cholera-421.html   (579 words)

  
 Microbiology Terms - C
The layer or structure that lies outside the cytoplasmic membrane; it supports and protects the membrane and gives the cell shape.
Cyclospora cayetanesis was recently recognized as a new (intestinal) protozoan pathogen of human (1993, species name was proposed in 1994) and was identified as the cause of the prolonged diarrhoea of travelers as well as immunocompetent and immunocompromised patients.
A resting stage formed by some bacteria and protozoa in which the whole cell is surrounded by a protective layer; not the same as spore.
library.thinkquest.org /3564/glossary/c.htm   (1321 words)

  
 Like a snail through the intestinal canal
There is a layer of slime, called mucus, on the inside of the large intestine (colon).
The robots, as they move forward under their own power, ignore this layer of mucus and try, if possible, to suck or grab on to the intestinal wall, which results in the walls being stretched and the patient feeling pain and discomfort.
To achieve this, an adhesive layer is added to the mucus-like properties, which allows the device to be stuck to the layer of mucus.
www.eurekalert.org /pub_releases/2006-09/duot-las092106.php   (612 words)

  
 The electrophoretic softness of the surface of Staphylococcus epidermidis cells grown in a liquid medium and on a solid ...   (Site not responding. Last check: 2007-11-05)
The electrokinetic potential decreases exponentially with distance from the rigid particle surface and the slip plane, determining its zeta potential, is close to the surface.
The soft particle is covered by a polyelectrolyte layer with fixed negative charges, through which electrophoretic fluid flow is possible.
layer and that of the volume density of fixed charges.
mic.sgmjournals.org /cgi/content/full/147/3/757   (2750 words)

  
 Intermediate Treatment   (Site not responding. Last check: 2007-11-05)
As the rotating distributor arms sprinkle primary effluent over the surface of the rock, biological organisms grow forming a slime layer which covers the rocks.
Finely suspended solids are also removed by the filters by adsorption onto the slime layer.
As the biological organisms grow, the thickness of the slime layer increases and is eventually sloughed off by the applied wastewater and a new layer of growth begins.
www.ci.des-moines.ia.us /departments/WRF/wrf_intermediate.htm   (244 words)

  
 F'BodySlimes
Hagfishes are particularly slimy; one of their common namses is "slime eel" though they are not closely related phylogenetically to the eels.
Body slimes are the products of these daughter cells and their degradation and, as such, are continuously replaced.
This situation is not the same as lactation in mammals; the slime is different chemically and there is not permanent organized structure for secretion.
www.wetwebmedia.com /FWSubWebIndex/f'bodyslimes.htm   (1581 words)

  
 Structure and Function of Bacterial Cells
The cell envelope is a descriptive term for the several layers of material that envelope or enclose the protoplasm of the cell.
The wall is relatively thick and consists of many layers of peptidoglycan interspersed with teichoic acids that run perpendicular to the peptidoglycan sheets.
The fatty acid tails from one layer face towards the fatty acid tails of the second layer ("likes dissolve like"), and the glycerol heads naturally turn towards the water (Figure 25 and 26).  Dispersed throughout the bilayer are various structural and enzymatic proteins which carry out most membrane functions.
www.bact.wisc.edu /themicrobialworld/structure.html   (6330 words)

  
 Surface Structures (cont.)
There are two types of glycocalyx, capsules and slime layers, but the difference between the two is somewhat arbitrary.
A slime layer is more diffuse and is easily washed away.
This outline is the capsule or slime layer.
lecturer.ukdw.ac.id /dhira/BacterialStructure/SurfaceStructs.html   (717 words)

  
 BTX Wastewater Bioreactor System - Bioscience, Inc.
This slime layer continuously metabolizes the organics in the wastewater converting the organics into CO and forming new biological growth as the old sloughs off the media.
This self-perpetuating microbial layer accumulates on and adheres to the media forming a "fixed" (or stationary) film past which the contaminated water is pumped by the BTX system.
As this layer becomes thicker, its lower portion becomes anaerobic and unable to remain attached to the PVC matrix.
www.bioscienceinc.com /BTX/datasheets/BTX.htm   (954 words)

  
 Functions and Possible Provenance of Primordial Proteins-Part II: Microorganism Aggregation in Clouds Triggered by ...
An adhesive slime layer is certainly instrumental in promoting the formation of colonies on Earth, and ensures that whenever NB suspended in the clouds encounter each other, they will stick together.
The result clearly demonstrated (a) the existence of water layers in the air, and (b) that photons of 670 nm, which are only minimally absorbed by water, interact with the nanoscopic water layers attached to surfaces.
It is useful to examine the entropic transition between the ordered interfacial water layers and the less-ordered bulk phase within a drop, and to realize its expression as a discontinuity in viscosity, ensuring that during evaporation, the bulk material can reach the periphery of the drop without contacting the substrate directly.
pubs.acs.org /cgi-bin/sample.cgi/jprobs/2005/4/i01/html/pr0498382.html   (3410 words)

  
 Structure and Function of Procaryotes
A type of capsule found in bacteria called a glycocalyx is a thin layer of tangled polysaccharide fibers which is almost always observed on the surface of cells growing in nature (as opposed to the laboratory).
The dextran slime can be depolymerized to glucose for use as a carbon source, resulting in production of lactic acid within the biofilm (plaque) that decalcifies the enamel and leads to dental caries or bacterial infection of the tooth.
Gram-negative bacteria may contain a single monomolecular layer of murein in their cell walls while Gram-positive bacteria are thought to have several layers or "wraps" of peptidoglycan.
www.textbookofbacteriology.net /structure.html   (7723 words)

  
 Biofilm Formation on Intraocular Lenses by a Clinical Strain Encoding the ica Locus: A Scanning Electron Microscopy ...
The adhesive layer was disrupted during sample examination, showing that bacterial colonies were literally coated on all sides with the layer.
Large arrows: anterior and posterior borders of the slime layer; small arrows: the edge of the bacterium, which was completely embedded in the slime layer.
Bacteria appeared to accumulate on the IOL surface as microcolonies (clusters of bacteria) and a mucoid layer seemed to shroud bacteria.
www.iovs.org /cgi/content/full/44/10/4382   (2916 words)

  
 Procaryote Extracellular Appendages
Despite their looseness, slime layers nevertheless play important roles in the attachment of bacteria to surfaces.
Slime layers can trap nutrients and water, acting, for example, as a seal over a nutritious substrate, thus allowing a bacteria to use exoenzymes (extracellular enzymes) in a limited area containing high concentrations of substrate.
String-like (or whip-like) appendages attached to the cell envelope of bacteria and which are twisted (spun) to propel bacteria.
www.mansfield.ohio-state.edu /~sabedon/biol1084.htm   (1326 words)

  
 Cell Wall   (Site not responding. Last check: 2007-11-05)
The Gram Negative cell wall has a peptidoglycan layer that is about 2-3 nm thick (thin compared to the gram positive) and makes up about 5-20% of the dry weight of the cell.
A capsule is a layer of mucoid material that surrounds the bacterial cell, lying outside the cell call.
Most bacteria possess a surface layer of a crystalline protein arrayed in a two dimensional matrix.
www.uta.edu /biology/badon/classnotes/3444/lecture4.htm   (1964 words)

  
 Septic System Drainfield Absorption System Biomat Formation - what leads to drain field clogging and expensive ...
The biomat, a bacterial slime layer in the soil below the leachfield and around other wastewater disposal systems, is a critical component of private septic systems - it is responsible for treatment and reduction of biological solids and pathogens in septic wastewater effluent which is discharged into the soil from a septic tank.
This layer is critical in the processing of fine biological solids and pathogens which are in the effluent, and without it the septic system would not be adequately treating the effluent.
This layer is known as the clogging mat, clogging zone, biocrust, and bioformat.
www.inspect-ny.com /septic/biomat.htm   (1497 words)

  
 HomeFashion - Featured Articles
It is not only slimy but--this is the sci-fi bit--it moves as much as a yard in just a few hours looking for light and a place to disperse its millions of spores to the wind.
Once, he said, he saw a slime mold erupt from the ground, decide not to fruit and crawl back into the soil.
When the slime mold erupted widely in Texas in the 1970s, "some people thought it was an alien creature," he said.
www.washingtonpost.com /wp-adv/specialsales/homefashion/post88.html   (579 words)

  
 Web Design Library
Delete all layers except for the wall and the slime text, and name the two remaining layers appropriately.
Leave the original layer as it was and hide it by clicking the eyeball in the Layers palette.
The slime should start dripping just a bit from the bottoms of letters and ends of strokes, and perhaps bulging but not dripping elsewhere.
www.webdesign.org /print.php?id=5734   (897 words)

  
 Slime, Sweet Slime
Another interesting thing about biofilms is the layer of slime that covers them.
The slime layer traps nutrients, anchors members of the biofilm and protects them.
Be sure to try the Microbial Slime activity in the Experiments section.
www.microbeworld.org /news/articles/slime_sweet.aspx   (318 words)

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