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Pesquisa : G01.311.355.750.500 [Categoria DeCS]
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Texto completo
Id: biblio-1008708
Autor: Valdebenito-Rolack, Emky; Ruiz-Tagle, Nathaly; Abarzúa, Leslie; Aroca, Germán; Urrutia, Homero.
Título: Characterization of a hyperthermophilic sulphur-oxidizing biofilm produced by archaea isolated from a hot spring
Fonte: Electron. j. biotechnol;25:58-63, ene. 2017. tab, graf, ilus.
Idioma: en.
Projeto: FONDECYT.
Resumo: Background: Sulphur-oxidizing microorganisms are widely used in the biofiltration of total reduced sulphur compounds (odorous and neurotoxic) produced by industries such as the cellulose and petrochemical industries, which include high-temperature process steps. Some hyperthermophilic microorganisms have the capability to oxidize these compounds at high temperatures (N60°C), and archaea of this group, for example, Sulfolobus metallicus, are commonly used in biofiltration technology. Results: In this study, a hyperthermophilic sulphur-oxidizing strain of archaea was isolated from a hot spring (Chillán, Chile) and designated as M1. It was identified as archaea of the genus Sulfolobus (99% homology with S. solfataricus 16S rDNA). Biofilms of this culture grown on polyethylene rings showed an elemental sulphur oxidation rate of 95.15 ± 15.39 mg S l-1 d-1, higher than the rate exhibited by the biofilm of the sulphur-oxidizing archaea S. metallicus (56.8 ± 10.91 mg l-1 d-1). Conclusions: The results suggest that the culture M1 is useful for the biofiltration of total reduced sulphur gases at high temperatures and for other biotechnological applications.
Descritores: Sulfetos/metabolismo
Reação em Cadeia da Polimerase
Archaea/isolamento & purificação
Fontes Termais/microbiologia
Temperatura Alta
Responsável: CL1.1 - Biblioteca Central

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Texto completo SciELO Brasil
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Id: lil-749707
Autor: Aanniz, Tarik; Ouadghiri, Mouna; Melloul, Marouane; Swings, Jean; Elfahime, Elmostafa; Ibijbijen, Jamal; Ismaili, Mohamed; Amar, Mohamed.
Título: Thermophilic bacteria in Moroccan hot springs, salt marshes and desert soils
Fonte: Braz. j. microbiol;46(2):443-453, Apr-Jun/2015. tab, graf.
Idioma: en.
Resumo: 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 by A. pallidus (4) and Aeribacillus sp. (2). In this study, B. aerius and B. tequilensis are described for the first time as thermophilic bacteria. Moreover, 71.25%, 50.41% and 5.41% of total strains exhibited high amylolytic, proteolytic or cellulolytic activity respectively.
Descritores: Bacillaceae/classificação
Bacillaceae/isolamento & purificação
Bacilos Gram-Positivos/classificação
Bacilos Gram-Positivos/isolamento & purificação
Fontes Termais/microbiologia
Microbiologia do Solo
Microbiologia da Água
Bacillaceae/efeitos da radiação
Análise por Conglomerados
DNA Bacteriano/química
DNA Bacteriano/genética
DNA Ribossômico/química
DNA Ribossômico/genética
Bacilos Gram-Positivos/genética
Bacilos Gram-Positivos/efeitos da radiação
Dados de Sequência Molecular
Análise de Sequência de DNA
Esporos Bacterianos/citologia
Responsável: BR1.1 - BIREME

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Id: lil-445755
Autor: Kotsias, Basilio A.
Título: Maravillas del infierno / The wonders of hell
Fonte: Medicina (B.Aires);65(5):461-464, 2005. ilus.
Idioma: es.
Descritores: Aeropyrum/enzimologia
Fontes Termais/microbiologia
-Aeropyrum/isolamento & purificação
Canais de Potássio/genética
Parede Celular/química
Taq Polimerase/genética
Thermus/isolamento & purificação
Limites: Animais
Responsável: BR1.1 - BIREME

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