
	Where results make sense

Topic: Purple sulfur bacteria

Related Topics

Aeromonadales

Cardiobacteriaceae

Acidithiobacillales

Alteromonadales

Gamma Proteobacteria

Proteobacteria

In the News (Mon 7 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		The purple sulfur bacteria are a group of Proteobacteria capable of photosynthesis, collectively referred to as purple bacteria.
		The purple sulfur bacteria are divided into two families, the Chromatiaceae and Ectothiorhodospiraceae, which respectively produce internal and external sulfur granules, and show differences in the structure of their internal membranes.
		Purple sulfur bacteria are generally found in illuminated anoxic zones of lakes and other aquatic habitats where hydrogen sulfide accumulates and also in "sulfur springs" where geochemically or biologically produced hydrogen sulfide can trigger the formation of blooms of purple sulfur bacteria.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=purple_sulfur_bacteria (306 words)

	Sergei Winogradsky Summary
		Diffusion of hydrogen sulfide produced by the anaerobic bacteria, from the sediment into the water column above supports the growth of anaerobic photosynthetic bacteria such as green sulfur bacteria and purple sulfur bacteria.
		These bacteria are able to utilize sunlight to generate energy and can use carbon dioxide in a oxygen-free reaction to produce compounds needed for growth.
		Winogradsky was born in Kiev, in what was then the Russian Empire, and attended the University of Saint Petersburg in 1881, studying natural sciences and receiving a degree of master of science in botany in 1884.
	www.bookrags.com /Sergei_Winogradsky (857 words)

	Australia's ancient oceans: toxic and purple
		Ancient oceans in Australia’s north were toxic seas of sulfur, supporting coloured bacteria that made the seas appear purple and unlike anything we know of in the Earth’s history, according to new ANU research.
		In the oil, he found the molecular remains of green and purple coloured carotenoid pigments that were used by the bacteria to conduct photosynthesis.
		Dr Brocks says the presence of the green and purple sulfur bacteria, types of which still exist today, showed that the ocean needed to be sufficiently sulfidic close to the surface where light could penetrate for the bacteria to survive.
	www.physorg.com /news7038.html (694 words)

	Microbial Mats from the Sippewissett Saltmarsh
		The major microbes of the pink layer are phototrophic purple sulfur bacteria.
		Purple sulfur bacteria and a diatom from the pink layer of a microbial mat from the Great Sippewissett Saltmarsh.
		Close-up of a group of purple sulfur bacteria (Thiopedia spec) clustered around a cell of a diatom.
	user.uni-frankfurt.de /%7Eschauder/mats/microbial_mats.html (991 words)

	The Phototrophic Bacteria
		Purple sulfure bacteria - Chromatiaceae - anaerobe and phototropes; one sp.
		Families I and II need purple chlorophyll because they grow in stagnant bottom muds where only purple is needed to trap the light that got thru the dense top algae.
		The purple bacteria are mostly red to purple (orange and red, brown); but one species is green.
	www.disknet.com /indiana_biolab/b410.htm (817 words)

	Life History and Ecology of Bacteria
		While pathogenic bacteria are notorious for such diseases as cholera, tuberculosis, and gonorrhea, such disease-causing species are a comparatively tiny fraction of the bacteria as a whole.
		Bacteria are so widespread that it is possible only to make the most general statements about their life history and ecology.
		Bacteria may also be classified both by the mode by which they obtain their energy.
	www.ucmp.berkeley.edu /bacteria/bacterialh.html (676 words)

	Bacteria - EvoWiki (Site not responding. Last check: )
		Bacteria are minute, with physical dimensions typically in the range of 0.5 to 5.0 micrometers (one micrometer is about 1/25,400 inch).
		Some bacteria are able to use molecular nitrogen as their source of nitrogen, converting it to nitrogenous compounds, a process known as nitrogen fixation.
		Bacteria, often in combination with yeasts and moulds, are used in the preparation of fermented foods such as cheese, pickles, soy sauce, sauerkraut, vinegar, wine, and yogurt.
	wiki.cotch.net /index.php/Bacteria (1555 words)

	Encyclopedia :: encyclopedia : Sulfur (Site not responding. Last check: )
		Sulfur is also used in batteries, detergents, the vulcanization of rubber, fungicides, and in the manufacture of phosphate fertilizers.
		Sulfur is absorbed by plants from soil as the sulfate ion.
		Sulfur mined in Alberta, prepared for shipment at Vancouver, B. Common naturally-occurring sulfur compounds include the metal sulfides, such as pyrite (iron sulfide), cinnabar (mercury sulfide), Galena (lead sulfide), sphalerite (zinc sulfide) and stibnite (antimony sulfide); and the metal sulfates, such as gypsum (calcium sulfate), alunite (potassium aluminium sulfate), and barite (barium sulfate).
	www.hallencyclopedia.com /Sulfur (2060 words)

	lagoon.html (Site not responding. Last check: )
		Purple-colored wastewater lagoons have less odor than conventional grayish lagoons because naturally occurring purple sulfur bacteria feed on ammonia and hydrogen sulfide, organic compounds that cause odor.
		Levels greater than 6 mmho/cm should raise a red flag that such lagoons are unlikely to support a purple sulfur bacteria population.
		Livestock waste lagoons that contain purple sulfur bacteria, such as this dairy lagoon near Wahoo, produce less odor and have a purplish cast.
	ard.unl.edu /rn/0300/lagoon.html (556 words)

	nitworks notes (Site not responding. Last check: )
		Sulfide may be oxidized to elemental sulfur aerobically by species of Thiothrix and Beggiatoa (morphologically conspicuous sulfur oxidizers), and anaerobically by the purple sulfur bacteria.
		In soil, the predominant microbes involved in the oxidation of sulfide to elemental sulfur belong to the genus Thiobacillus.
		Sulfur dioxide can precipitate onto surfaces where it can be oxidized to sulfate in the soil (it is also toxic to some plants), reduced to sulfide in the atmosphere, or oxidized to sulfate in the atmosphere as sulfuric acid, a principal component of acid rain.
	www.nitworks.com /notes (1758 words)

	Microbiology and Bacteriology :: The world of microbes (Site not responding. Last check: )
		The anoxygenic photosynthetic bacteria can be divided into 7 subgroups, separated on the basis of their photopigments, organization of their photosynthetic structures, and whether they accumulate sulfur granules.
		Bacteria from subgroups 4,5, and 6 had previously been grouped together as green bacteria, but recent taxonomic advances has lead to a rethinking of this categorization.
		The purple bacteria, ranging in color from purple-violet, purple-red, to rose-red, have bacteriochlorophyll a or b.
	www.bact.wisc.edu /Microtextbook/index.php?module=Book&func=displayarticle&art_id=98 (1272 words)

	[No title] (Site not responding. Last check: )
		The purple non-sulfur bacteria are a family (Rhodospirillaceae) of phototrophic bacteria that photosynthesize using bacteriochlorophylls a and b in anoxic environments, such as the bottom mud of ponds and other stagnant water, although they are able to survive in air.
		Members of the family range in color from purple to red and brown, with shapes including spherical, rod, vibrio, and spiral (Rhodospirillum).
		The genus Magnetospirillum is magnetotactic; using chains of tiny crystals of magnetite, these bacteria are able to use the Earth's magnetic field to return to the bottom of a pond (since the magnetic lines of force run downwards as well as to the north or south).
	www.wikiwhat.com /encyclopedia/p/pu/purple_non_sulfur_bacteria.html (138 words)

	[No title]
		This effect is due to the lowering of pH at the surface of the skin, improving the hydration of the keratin layer.
		DNA sequence data from several non-nitrogen fixing bacteria, including E.coli (53), Haemophilus influenzae (54), Buchnera aphidicola (55), Neisseria gonnorhoeae,3 and Pseudomonas aeruginosa,4 reveal a region containing both chaperone genes and genes homologous to the Fe/S cluster maturation genes (nif genes) of nitrogen fixing bacteria.
		On Earth, such changes are often produced by terrestrial bacteria that derive their energy solely from the conversion of sulfur compounds from one form to another.
	lycos.cs.cmu.edu /info/sulfur--bacteria.html (452 words)

	Dorlands Medical Dictionary
		one that is autotrophic and obtains energy by the oxidation of inorganic compounds of iron, nitrogen, sulfur, or hydrogen; none is pathogenic.
		Purple nonsulfur bacteria reduce CO and oxidize sulfide or thiosulfate but not elemental sulfur in the presence of the pigment bacteriochlorophyll a.
		Purple sulfur bacteria reduce carbon dioxide and oxidize sulfides and elemental sulfur in the presence of the pigment bacteriochlorophyll a or b.
	www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_b_02zPzhtm (2616 words)

	Proteobacteria
		The purple sulfur bacteria are generally beta or gamma proteobacteria, utilize sulfide as an electron donor and can tolerate high concentrations of sulfide.
		The purple nonsulfur bacteria are primarily alpha proteobacteria
		Purple nonsulfur bacteria are able to utilize sulfide as an electron donor, but cannot tolerate it at high concentration
	www.life.umd.edu /labs/delwiche/PSlife/lectures/Proteo.html (302 words)

	geobiology @ mit
		They are biosynthesized by all photosynthetic bacteria, eukaryotes and halophilic (high salt concentrations) archaea, but also occur in a large variety of nonphotosynthetic organisms.
		The biomass of purple sulfur bacteria are commonly depleted in
		The biomarkers for green sulfur bacteria are commonly enriched in
	www-eaps.mit.edu /geobiology/biomarkers/carotenoids.html (346 words)

	[No title]
		Isolation of purple non-sulfur bacteria is accomplished easily by adding the source material to a liquid enrichment medium in a stoppered bottle.
		Sulfur was source for treatment of many diseases by Greeks and Arabians.
		Sulfur mustards are chemical warfare agents that can cause skin burns and blisters and damage to the respiratory airways.
	www.lycos.com /info/sulfur--air.html (443 words)

	Revisiting Bacteria : Exploring Essential Information, Data and Explanation.
		Bacteria are minute, with physical dimensions typically in the range of 0.5 to 5.0 micrometers.
		Exceptions are known, the largest reported bacteria, the size of a full stop (period), were isolated in the gut of a fish in the early 1990s.
		Antiseptic measures may be taken to prevent infection by bacteria, for example, prior to cutting the skin during surgery or swabbing skin with alcohol when piercing the skin with the needle of a syringe.
	www.llpoh.org /Biology_Update/Bacteria.html (2909 words)

	Bacteria (Site not responding. Last check: )
		coli, plague, Salmonella), pseudomonads, rickettsias (causing typhus), purple sulfur bacteria and the mitochondria of aerobic eukaryotes.
		Thermus, Aquifex, Thermotoga, photosynthetic green nonsulfur bacteria and the radio-resistant deinococci, considered to be close to the root of the tree of life by some authorities.
		Bacteria with sphingolipids in their membranes, includes green sulfur bacteria, Bacteroides and flavobacteria.
	www.steve.gb.com /perl/lesson17/Bacteria.html (231 words)

	The Search for Microbial Biodiversity
		Algae, aerobic sulfur bacteria, and cyanobacteria are found in the upper layer of the column where oxygen is available.
		Green sulfur bacteria are resistant to high hydrogen sulfide concentrations typically found in these regions of the Winogradsky column.
		After a period of several weeks patches of red, green, and purple appeared at different depths of the column indicating the enriched media of cellulose and sulfur provided a suitable environment to colonization of aerobic and anaerobic bacteria (Figure 2).
	www.woodrow.org /teachers/bi/1999/projects/group8/sediment1.html (1583 words)

	ISME-International SOCIETY FOR MICROBIAL ECOLOGY
		In situ hybridization with specific oligonucleotide probes was used to monitor population dynamics of phototrophic sulfur bacteria in the chemocline of the meromictic Lake Cadagno, Switzerland, over a period of 10 years (1994-2003).
		The initial importance of C. okenii, however, was replaced by populations of small-celled purple bacteria that were abundant between 1994 and 2001.
		Bacteria represented on average 28% and 25%, sulfate-reducing bacteria 19 and 5%, and Archaea 9% and 2% of the microbial communities at Lake Cadagno and Rotsee, respectively.
	www.microbes.org /labs.asp (1421 words)

	Does Kimchee Kill Germs on Contact? - Literature
		"Most bacteria may be placed into one of three groups based on their response to gaseous oxygen." Aerobic bacteria succeed in the presence of oxygen and require it to grow and exist.
		Bacteria may also be classified by the method in which they obtain their energy.
		The bacteria did not seem to be affected by the garlic because the colonies kept on growing.
	home.hawaii.rr.com /mejung/sf-literature.html (586 words)

	Rodney Herbert Personal Page
		The complex interactions occurring in microbial mats between the cyanobacteria, colourless sulfur bacteria, purple sulfur bacteria and sulfate-reducing bacteria are shown in the schematic diagram.
		Microbial mats are increasingly viewed as important model systems for the study of ecological relationships and biogeochemical cycles and due to their high biomass content may contribute to and perhaps modulate global processes.
		The surface layer is dominated by cyanobacterial microalgae, the layer immediately below colourless sulfur bacteria, purple sulfur bacteria and the lowest layer sulfate reducing bacteria.
	www.dundee.ac.uk /biocentre/SLSBDIV7rah.htm (240 words)

	ipedia.com: Purple sulfur bacteria Article (Site not responding. Last check: )
		The purple sulfur bacteria or Chromatiaceae are a group of anaerobic or microaerophilic photosynthetic Gram negative bacteria which express a variety of pigments, including yellow and red carotenoids...
		The purple sulfur bacteria or Chromatiaceae are a group of anaerobic or microaerophilic photosynthetic Gram negative bacteria which express a variety of pigments, including yellow and red carotenoids and bacteriochlorophylls a and b which can combine to form purple, red, brown, or orange colorations.
		The bacteria are often found in sulfur springs and stagnant water.
	www.ipedia.com /purple_sulfur_bacteria.html (174 words)

	Foundations to Chemistry - adapted from "Chemistry, Matter and the Universe"
		In the face of constant competition for the limited amounts of organic matter, certain bacteria (if we may now call them that) found ways to enhance their survival by using metalloporphyrins and similar delocalized ring molecules to absorb solar energy.
		Colonies of green sulfur bacteria and sulfate-respiring bacteria could have existed in close symbiotic association, as they sometimes do today, passing oxidized and reduced sulfur compounds back and forth and drawing their common support from the sun.
		The ancestors of the purple nonsulfur bacteria arose, which were dependent mainly on cyclic photophosphorylation for ATP energy.
	www.chem.ox.ac.uk /vrchemistry/chapter26/page33.htm (291 words)

	Winogradsky Column p6
		Sulfur from the lower part of the column has begun to move up in the form of H2S.
		The green and purple sulfur bacteria gain energy from light reactions and produce their cellular materials from CO2 in much the same way as plants do.
		At one level purple sulfur bacteria such as Chromatium, in a Red to Purple layer, are processing Sulfates into Sulfur.
	www.woodrow.org /teachers/bi/2000/Winogradsky_Column/winogradsky_column_p6.html (493 words)

	Bacteria
		Bacteria are microscopic organisms whose single cells have neither a membrane-bounded nucleus nor other membrane-bounded organelles like mitochondria and chloroplasts.
		Bacteria that are not decolorized by the alcohol/acetone wash are Gram-positive.
		They are probably the descendants of Gram-positive bacteria who have lost much of their genome — now depending on the gene products of their host.
	users.rcn.com /jkimball.ma.ultranet/BiologyPages/E/Eubacteria.html (3122 words)

	[No title]
		An important distinction between cycling of sulfur and cycling of nitrogen and carbon is that sulfur is "already fixed".
		The largest reservoir of biological useful sulfur is found in the ocean as sulfate anions (very concentrated at 2.6 g/L), dissolved hydrogen sulfide gas, and elemental sulfur.
		The green and purple sulfur bacteria oxidize hydrogen sulfide for photosynthesis.
	www.biosci.ohio-state.edu /~mgonzalez/Micro521/23.html (1263 words)

	winogradsky
		Typically the lower portions of the column are colonizied by photoautotrophic green and purple sulfur bacteria.
		The aerobic surface of the column is occupied by oxygenic cyanobacteria.
		The majority of the bacteria are located in a thin film between the soil/mud substrate and the container wall.
	www.personal.psu.edu /faculty/j/e/jel5/biofilms/winogradsky.html (949 words)

Try your search on: Qwika (all wikis)