Consulta: subjectFacets:"Thermophilic bacteria"
Registros recuperados: 4
Data/hora: 09/06/2024 13:32:58

Marinilactibacillus piezotolerans sp nov., a novel marine lactic acid bacterium isolated from deep sub-seafloor sediment of the Nankai Trough
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Toffin, Laurent; Zink, Klaus; Kato, Chiaki; Pignet, Patricia; Bidault, Adeline; Bienvenu, Nadège; Birrien, Jean-louis; Prieur, Daniel.
A piezotolerant, mesophilic, marine lactic acid bacterium (strain LT20(T)) was isolated from a deep sub-seafloor sediment core collected at Nankai Trough, off the coast of Japan. Cells were Gram-positive, rod-shaped, non-sporulating and non-motile. The NaGl concentration range for growth was 0-120 gl(-1), with the optimum at 10-20 g l(-1). The temperature range for growth at PH 7.0 was 4-50 degreesC, with the optimum at 37-40 degreesC. The optimum pH for growth was 7.0-8.0. The optimum pressure for growth was 0.1 MPa with tolerance up to 30 MPa. The main cellular phospholipids were phosphatidylglycerols (25 %), diphosphatidylglycerols (34 %) and a group of compounds tentatively identified as ammonium-containing phosphatidylserines (32 %);...
Tipo: Text
Palavras-chave: Phylogeny; Biochemistry; Microbiology; Thermophilic bacteria; Deep sub seafloor sediment.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-592.pdf

Population dynamics and extracellular enzymes activity of mesophilic and thermophilic bacteria isolated from semi-arid soil of Northeastern Brazil
Provedor de dados: Brazilian Journal of Microbiology
Autores: Gorlach-Lira,Krystyna; Coutinho,Henrique D.M.
The dynamics of mesophilic and thermophilic bacterial population was studied in the bulk soil and rhizosphere of the grass Aristida adscensionis L. in a caatinga of the semi-arid Brazilian Northeast. Mesophilic heterotrophic bacteria, sporeforming bacteria and actinomycetes were significantly more abundant than thermophiles, and their counts were 10(6) - 10(7) CFU g-1 dry soil, showing weak fluctuations over the one-year study period. Thermophiles were below 10(6) CFU g-1 dry soil and, in general, demonstrated stronger fluctuations over the studied period. Among them, thermophilic actinomycetes showed the greatest decline during the dry season. No significant differences in microbial number were observed between bulk and rhizosphere soil. Mesophilic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mesophilic bacteria; Thermophilic bacteria; Actinomycetes; Extracellular enzymes; Semi-arid; Caatinga.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100028

Thermophilic bacteria in Moroccan hot springs, salt marshes and desert soils
Provedor de dados: Brazilian Journal of Microbiology
Autores: Aanniz,Tarik; Ouadghiri,Mouna; Melloul,Marouane; Swings,Jean; Elfahime,Elmostafa; Ibijbijen,Jamal; Ismaili,Mohamed; Amar,Mohamed.
The diversity of thermophilic bacteria was investigated in four hot springs, three salt marshes and 12 desert sites in Morocco. Two hundred and forty (240) thermophilic bacteria were recovered, identified and characterized. All isolates were Gram positive, rod-shaped, spore forming and halotolerant. Based on BOXA1R-PCR and 16S rRNA gene sequencing, the recovered isolates were dominated by the genus Bacillus (97.5%) represented by B. licheniformis (119), B. aerius (44), B. sonorensis (33), B. subtilis (subsp. spizizenii (2) and subsp. inaquosurum (6)), B. amyloliquefaciens (subsp. amyloliquefaciens (4) and subsp. plantarum (4)), B. tequilensis (3), B. pumilus (3) and Bacillus sp. (19). Only six isolates (2.5%) belonged to the genus Aeribacillus represented...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermophilic bacteria; Hot springs; Diversity; 16S rRNA gene sequencing; Hydrolytic enzymes.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000200443

Optimization of extracellular thermophilic highly alkaline lipase from thermophilic Bacillus sp isolated from Hotspring of Arunachal Pradesh, India
Provedor de dados: Brazilian Journal of Microbiology
Autores: Bora,Limpon; Bora,Minakshi.
Studies on lipase production were carried out with a bacterial strain (Bacillus sp LBN 2) isolated from soil sample of hotspring of Arunachal Pradesh, India. The cells were cultivated in a mineral medium with maximum production at 1% groundnut oil. The optimum temperature and initial medium pH for lipase production by the organism were 50ºC and 9.0 respectively. The molecular mass was found to be 33KDa by SDS PAGE. The optimal pH and temperature for activity were 10 and 60ºC respectively. The enzyme was found to be stable in the pH range of 8-11 with 90% retention of activity at pH 11. The enzyme retained 90% activity at 60ºC and 70% of activity at 70ºC for 1h. The lipase was found to be stable in acetone followed by ethanol. The present findings suggested...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermophilic bacteria; Thermostable; Alkaline lipase and Bacillus sp.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100004