
	Where results make sense

Topic: Psychrophilic

Related Topics

Extremophile

Xerotolerant

Thermophile

Hyperthermophile

Halophile

Anaerobe

Alkaliphile

Bacterium

Henry Thrale

Faction

French Resistance

Archaea

Asymmetric warfare

In the News (Sat 19 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Psychrophile Summary
		Psychrophilic bacteria are abundant in the near-freezing waters of the Arctic and the Antarctic.
		Psychrophiles utilize a wide variety of metabolic pathways, including photosynthesis, chemoautotrophy (also sometimes known as lithotrophy), and heterotrophy, and form robust, diverse communities.
		Obligate psychrophiles are those organisms having a growth temperature optimum of 15°C or lower and cannot grow in a climate beyond a maximum temperature of 20°C. They are largely found in icy places (such as in Antarctica) or at the freezing bottom of the ocean floor.
	www.bookrags.com /Psychrophile (798 words)

	Psychrophile - Wikipedia, the free encyclopedia
		Psychrophiles are extremophilic organisms that are capable of growth and reproduction in cold temperatures.
		Psychrophiles get their nutrients, which flow in tiny streams between cracks and layers of ice, from the inside of frozen glaciers and seawater, as well as from the soil.
		Classic psychrophiles are those organisms having a growth temperature optimum of 15°C or lower - and do not grow in a climate beyond a maximum temperature of 20°C. They are largely found in icy places (such as in Antarctica) or at the freezing bottom of the ocean floor.
	www.wikipedia.org /wiki/Psychrophilic (285 words)

	The cold-inducible icl gene encoding thermolabile isocitrate lyase of a psychrophilic bacterium, Colwellia maris -- ...
		The cold-inducible icl gene encoding thermolabile isocitrate lyase of a psychrophilic bacterium, Colwellia maris -- Watanabe et al.
		The cold-inducible icl gene encoding thermolabile isocitrate lyase of a psychrophilic bacterium, Colwellia maris
		The gene encoding isocitrate lyase (ICL; EC 4.1.3.1) of a psychrophilic
	mic.sgmjournals.org /cgi/content/full/148/8/2579 (4835 words)

	Psychrophilic microorganisms from the deep-sea environment
		C or lower) are referred to as psychrophiles and psychrotrophs.
		This paper describes characteristics of psychrophilic and psychrotrophic bacteria isolated from the deep sea and properties of their enzymes.
		The psychrophilic bacteria described in this paper are able to grow efficiently at low temperatures, illustrating their physiological adaptation to the permanently cold deep-sea environment.
	www.riken.go.jp /lab-www/library/publication/review/html/No03/03-04/03-04.html (672 words)

	Cold-adapted archaea: Nature Reviews Microbiology
		Psychrophilic microorganisms proliferate at 0–10°C, metabolize in snow and ice at –20°C, are predicted to metabolize at -40°C and can survive at -45°C (Refs 1–6).
		Properties of culturable archaeal psychrophiles are described in Table 1, and their phylogeny relative to uncultivated members is highlighted in Fig 1.
		As a result, all components of psychrophiles must be adapted to the cold to enable an overall level of cellular function that is sufficient for growth and survival.
	www.nature.com /nrmicro/journal/v4/n5/full/nrmicro1390.html (7366 words)

	Microbial Cell Factories \| Full text \| A novel genetic system for recombinant protein secretion in the Antarctic ...
		Psychrophilic transconjugants were grown in liquid culture at 4°C, and samples were harvested at different phases during the growth.
		The recorded psychrophilic α-amylase activity (accounting for either the chimerical enzyme or the free one) was used to calculate the secretion yield, which resulted to be above 90% (Table 1).
		As previously reported for the psychrophilic α-amylase [13], secretion of AmyΔCt-derived chimerical proteins requires the crossing of two membranes, and the transit into the periplasmic space, where protein folding and disulphide bond formation can occur.
	www.microbialcellfactories.com /content/5/1/40 (3295 words)

	Arctic sediments and psychrophilic sulfate-reducing bacteria
		We currently analyze important properties of the psychrophilic sulfate reducers, such as their substrate affinity as a function of temperature under chemostat growth conditions or their ability to use alternative electron acceptors such as ferric iron.
		Genomics Programhere at the MPI that studies gene regulation at the transcription and proteomic level of mesophilic and psychrophilic sulfate reducers will in the coming years expectedly lead to the ability to study regulation in natural populations of these bacteria.
		We are initiating a collaboration with the University of Hamburg and the AWI to investigate biogeochemical processes, specifically sulfate reduction, methanogenesis, and methane oxidation, at the interface between permafrost within the sea floor and seawater, overlapping onto the permafrost as a consequence of post-glacial sea level rise, in the coastal Laptev Sea of northern Siberia.
	www.mpi-bremen.de /en/Arctic_sediments_and_psychrophilic_sulfate-reducing_bacteria.html (375 words)

	CASSLS Evolution Conference - DeLong Abstract
		Specifically, high levels of a single species of psychrophilic, symbiotic crenarchaeon, Cenarchaeum symbiosum, were discovered within the tissues of its host, a marine sponge Axinella mexicana (Preston et al., 1996).
		A psychrophilic crenarchaeon inhabits a marine sponge: Cenarchaeum symbiosum gen. nov., sp.
		Characterization of a DNA polymerase from the uncultivated psychrophilic archaeon Cenarchaeum symbiosum.
	www.mbl.edu /CASSLS/DELONG.ABS.html (1188 words)

	Nutrition and Growth of Bacteria
		Psychrophilic bacteria are adapted to their cool environment by having largely unsaturated fatty acids in their plasma membranes.
		Psychrophiles also have enzymes that continue to function, albeit at a reduced rate, at temperatures at or near 0 degrees.
		Usually, psychrophile proteins and/or membranes, which adapt them to low temperatures, do not function at the body temperatures of warm-blooded animals (37 degrees) so that they are unable to grow at even moderate temperatures.
	textbookofbacteriology.net /nutgro.html (4382 words)

	Arctic Microbiology (Site not responding. Last check: 2007-10-23)
		The potential of psychrophilic microorganisms in biotechnological applications has received increased attention in recent years.
		The project is targeting three main areas:1) Bioprospecting for novel psychrophilic and psychrotrophic microorganisms; 2) Biodegradation of toxic organic contaminants in the arctic environment; and 3) Effect of soil microbial activity and nutrient cycling on forest growth in northern Finland.
		The goal of the research project is to characterize contaminant degrading psychrophilic and psychrotrophic microbes, with a focus on petroleum hydrocarbons and fuel additives.
	aesop.rutgers.edu /~haggblom/articmicro.html (429 words)

	UCL/AGRO/CABI/GEBI/Psycrophiles (UK) (Site not responding. Last check: 2007-10-23)
		Psychrophilic bacteria used as a tool in bioremediation.
		The growth capacity of microorganisms generally used in the environmental treatments is limited during the periods from autumn to spring as a consequence of low temperature.
		Department of Biochemistry of University in Liège possesses of important collection of psychrophilic microorganisms isolated in Antarctic.
	www.gebi.ucl.ac.be /search/projects/Psychrophiles/index.htm (285 words)

	Research
		The waste water was fed as it is for the first four weeks, then a supplement of 1 g/l of whey was given for the next four weeks and was reduced to 0.5 g/l and continued until the end of the experiment.
		The psychrophilic and Thermophilic reactor were operated at two different HRTs of 48 and 24 h, while the mesophilic reactor was operated at 48, 36 and 24 h HRT.
		When we compare the performance of the thermophilic and mesophilic reactor at similar conditions we see that they were not affected by the change in HRT as much as the psychrophilic reactor showing a constant removal efficiency of over 70 %.
	publish.uwo.ca /~pmohan2/Research.html (581 words)

	Structure and function of L-lactate dehydrogenases from thermophilic, mesophilic and psychrophilic bacteria, IX. ... (Site not responding. Last check: 2007-10-23)
		Identification, isolation and nucleotide sequence of two L-lactate dehydrogenase genes of the psychrophilic bacterium Bacillus psychrosaccharolyticus.The nucleotide sequences of LDH(P) and LDH(X) show 77% identity.
		Two genes encoding for L-lactate dehydrogenase (LDH) from the psychrophilic bacterium Bacillus psychrosaccharolyticus (DSM 6) were cloned and their nucleotide sequence determined using a pEMBL vector and gene hybridization probes.
		The deduced amino-acid sequence of the gene from clone pLDH(X), which is located on a 5.87-kb HindIII-fragment, shows an identity of 86% as compared with the sequence of the wildtype LDH(P) from B. psychrosaccharolyticus and consists of 319 amino acids.
	www.ihop-net.org /UniPub/iHOP/gp/9831.html (218 words)

	intas 96-2045 (Site not responding. Last check: 2007-10-23)
		Expected results include the elucidation of the bottlenecks of psychrophilic methanogenic degradation, the prove that psychrophilic methanogenic communities exist and that psychrophilic treatment of organic waste could be a possible alternative under certain conditions.
		Several pure cultures of psychrophilic and psychrotrophic anaerobic acetogenic bacteria and methanogenic archeae were isolated from cold environments.
		Psychrophilic methanogenic microbial communities differ from mesophilic ones and contain psychrophilic and psychrotrophic bacteria and archeae.
	www.intas.be /catalog/961-2045.htm (1233 words)

	School of Biological Sciences
		The gene that encodes the enzymes will be cloned, characterised and overexpressed in order to achieve the ultimate aim of the related research, to study the structure-function relationship of the hydrolytic and glycolytic enzymes.
		Cloning and characterization of lipase gene from a psychrophile.
		Molecular identification and characterization of phosphofructokinase gene from the psychrophilic bacteria.
	www.usm.my /bio/asrar.htm (172 words)

	Expression of Psychrophilic Genes in Mesophilic Hosts: Assessment of the Folding State of a Recombinant alpha -Amylase ...
		Expression of Psychrophilic Genes in Mesophilic Hosts: Assessment of the Folding State of a Recombinant alpha -Amylase -- Feller et al.
		-Amylase from the antarctic psychrophile Alteromonas haloplanktis is synthesized at 0 ± 2°C by the wild strain.
		Schrøder Leiros, H.-K., Willassen, N. P., Smalås, A. Structural comparison of psychrophilic and mesophilic trypsins: Elucidating the molecular basis of cold-adaptation.
	aem.asm.org /cgi/content/full/64/3/1163 (1617 words)

	Phylogenetic Affiliation and Quantification of Psychrophilic Sulfate-Reducing Isolates in Marine Arctic Sediments -- ...
		Psychrophilic sulfate reducers isolated from MPN enrichments (12) were phylogenetically analyzed by 16S rDNA sequencing.
		nov., a new moderately psychrophilic sulfate-reducing bacterium with gas vacuoles isolated from a temperate estuary.
		Psychrophilic sulfate-reducing bacteria isolated from permanently cold Arctic marine sediments: description of Desulfofrigus oceanense gen. nov., sp.
	aem.asm.org /cgi/content/full/65/9/3976 (3419 words)

	Glossary - Backyard Composting Guide
		when less attention is given to providing and maintaining optimum conditions for compost piles, the resulting environment that will attract psychrophilic bacteria, possibly mesophyllic bacteria, but not thermophilic bacteria.
		As the psychrophilic bacteria work, the compost pile will reach about 55 degrees F. This is the slow method of creating compost from a backyard pile and can take as long as six months to two years to create compost.
		As the thermophilic bacteria work, the compost pile temperature will reach as high as 170 degrees F. This is the fastest method of creating compost from a backyard pile and can take as little as three weeks if the pile is monitored and turned each time the temperature starts to fall.
	www.city.davis.ca.us /pw/compost/glossary.cfm (795 words)

	Re: Survival of bacteria in Antarctica
		Psychrophilic species actually prefer the cold and grow best at temperatures between 0 and 20 degrees C. There are actually many habitats in Antarctica where things can live.
		As you suggested, many of the organisms that live there are bacteria, but there are also single-celled protozoans, fungi such as yeasts, algae and simple plants such as lichens and mosses.
		There are also several kinds of fish and insects that live happily at 1-5 degrees C. My current research is concerned with the psychrophilic Archaea, which are similar in some ways to bacteria, but form a different domain of life.
	www.madsci.org /posts/archives/aug2000/967423758.Mi.r.html (643 words)

	Nat' Academies Press, Frontiers in Polar Biology in the Genomics Era (2003)
		This is a shortcoming that should be remedied since psychrophilic prokaryotes offer a tremendous opportunity to better understand the genetic basis for the psychrophilic phenotype, which has potential bio- technological applications as outlined in Chapter 2.
		Comparison of the psychrophilic Oscillatoria genome with the genomes of marine cyanobacteria already available may reveal clues as to the factors limiting distribution of the latter group.
		Chlamydomonas subcaudata is a green psychrophilic alga isolated from the permanently ice-covered Lake Bonney in the McMurdo Dry Valleys in Antarctica (Lizotte and Priscu, 1992~.
	www.nap.edu /books/0309087279/html/82.html (8435 words)

	The Persistent Professor (Site not responding. Last check: 2007-10-23)
		As Deming discovered during her years as a doctoral candidate at the University of Maryland, bacteria that are both cold-adapted (or psychrophilic) and pressure-adapted (barophilic) are the dominant forms of active life on the ocean floor.
		In the not-too-distant future, compounds extracted from psychrophilic bacteria could be instrumental for storing human organ cells or tissue.
		Perhaps as important, an understanding of psychrophiles could offer valuable insights into the origins and persistence of life on Earth and the possible habitability of other celestial bodies.
	www.wsg.washington.edu /publications/seastar/archive/storyarchives/extremes.html (1837 words)

	Structure and Function of Proteins 2005: Exercise 8.2
		Thus, the absence of proline residues in loop regions and the presence of prolines residues in helices, in the psychrophilic enzyme (1A59), increase the overall flexibility of the protein.
		Sequence analysis of many psychrophilic proteins have revealed significant insertions of mainly charged residues into loop regions compared with the homologue mesophilic/thermophilic proteins, and it has been proposed that these insertions increase the flexibility of the structure.
		Sufficient flexibility of the enzyme may be achieved by the removal of proline residues in loop regions, coupled with increases in the length and charge of loops.
	courses.md.huji.ac.il /81817/Course_2005/exercise8.2.html (536 words)

	Helsingin yliopisto (Site not responding. Last check: 2007-10-23)
		Psychrophiles have been also recognized as vital players in nutrient cycling, gas production and bioremediation in forest-, agriculture- and in permafrost-soils (Wagner et al.
		Cold adapted microbes with temperature growth optima in the range of <0 to <10 oC achieve their specific eco-physiological success from their unique feature and properties of their enzymes, membranes (proteins, lipids) and genetic response to thermal shifts and variations (Russel 1997, Thomas and Cavicchioli 1998).
		Microbial communities in these environments are exposed to two different temperature regimes: a constant cold stenothermic cold psychrophilic temperature regime in deep lake water and sediments and a psychrophilic-eutectophilic environment in permafrost surface soil fluctuating from about -40 to +20 oC.
	www.helsinki.fi /lammi/english/Uwe.htm (1048 words)

	Anaerobic Fermentation of Organic Municipal Solid Wastes for the Production of Soluble Organic Compounds
		Conclusively, the study of the psychrophilic fermentation process allowed for completing the scenario of different options of anaerobic solid-state fermentation of organic waste.
		Though mesophilic and thermophilic processes resulted in being more effective in dissolution of particulate matter, psychrophilic processes can be of some interest because they are simpler and energy saving.
		In particular, psychrophilic processes can be useful for the production of rough soluble COD to be used, e.g., for sustaining the biological nutrients removal processes in wastewater treatment.
	pubs.acs.org /cgi-bin/abstract.cgi/iecred/2005/44/i10/abs/ie048937m.html (326 words)

	Extremophiles Bioprospecting for antimicrobials (Site not responding. Last check: 2007-10-23)
		Extremophiles are also found in highly saline lakes, or salterns, sometimes at salt conditions near that of saturation, and in environments with extreme pH values, either acidic (acidic sulphur fields), or alkaline (freshwater, hot springs, carbonate springs, alkaline soils and soda lakes).
		The habitats of psychrophilic organisms include the cold polar seas and soils, and Alpine glaciers, as well as deep-sea sediments, which are not only permanently cold but also at high pressure (Cavicchioli et al., 2002; Russell, 1998).
		A psychrophilic crenarchaeon inhabits a marine sponge: Cenarchaeum symbiosum gen.
	www.mediscover.net /Extremophiles.cfm (4451 words)

	Faculty Research - Brenchley
		Isolation of Psychrophilic Microbial Diversity and the Biochemical Characterization of Cold-Active Enzymes
		Biochemical and phylogenetic analyses of psychrophilic isolates belonging to the Arthrobacter subgroup and description of Arthrobacter psychrolactophilus, sp.
		Biochemical and phylogenetic analyses of a cold-active ß-galactosidase from the lactic acid bacterium Carnobacterium piscicola strain BA.
	www.bmb.psu.edu /faculty/brenchley/brenchley.html (1031 words)

	JGI Psychrobacter cryohalolentis K5 Home
		The genus Psychrobacter is comprised primarily of halotolerant, psychrophilic to mesophilic, aerobic, non-motile, Gram-negative coccobacilli and was first described as a separate genus within the gamma-proteobacteria in 1986 [1].
		nov., a lipase-producing facultative psychrophile isolated from the coast of the Okhotsk Sea.
		Maruyama, A., et al., Phylogenetic analysis of psychrophilic bacteria isolated from the Japan Trench, including a description of the deep-sea species Psychrobacter pacificensis sp.
	genome.jgi-psf.org /finished_microbes/psycr/psycr.home.html (465 words)

	Compost Glossary
		The three types of bacteria are psychrophilic, mesophyllic, and thermophilic.
		As the psychrophilic bacteria work, the compost pile will reach about 55 degrees F. This is the slow method of creating compost from a backyard pile, and can take as long as 6 months to 2 years to create compost.
		As the thermophilic bacteria work, the compost pile will reach as high as 170 degrees F. This is the fastest method of creating compost from a backyard pile, and can take as little as 3 weeks if the pile is monitored and turned each time the temperature starts to fall.
	www.bioquaticsupply.com /html/glossar1.html (1508 words)

Try your search on: Qwika (all wikis)