Base de dados : LILACS
Pesquisa : B01.300.179.120.174.850 [Categoria DeCS]
Referências encontradas : 5 [refinar]
Mostrando: 1 .. 5   no formato [Detalhado]

página 1 de 1

  1 / 5 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-780826
Autor: Fonseca, María Isabel; Tejerina, Marcos Raúl; Sawostjanik-Afanasiuk, Silvana Soledad; Giorgio, Ernesto Martin; Barchuk, Mónica Lucrecia; Zapata, Pedro Darío; Villalba, Laura Lidia.
Título: Preliminary studies of new strains of Trametes sp. from Argentina for laccase production ability
Fonte: Braz. j. microbiol;47(2):287-297, Apr.-June 2016. tab, graf.
Idioma: en.
Resumo: Abstract Oxidative enzymes secreted by white rot fungi can be applied in several technological processes within the paper industry, biofuel production and bioremediation. The discovery of native strains from the biodiverse Misiones (Argentina) forest can provide useful enzymes for biotechnological purposes. In this work, we evaluated the laccase and manganese peroxidase secretion abilities of four newly discovered strains of Trametes sp. that are native to Misiones. In addition, the copper response and optimal pH and temperature for laccase activity in culture supernatants were determined.The selected strains produced variable amounts of laccase and MnP; when Cu2+ was added, both enzymes were significantly increased. Zymograms showed that two isoenzymes were increased in all strains in the presence of Cu2+. Strain B showed the greatest response to Cu2+ addition, whereas strain A was more stable at the optimal temperature and pH. Strain A showed interesting potential for future biotechnological approaches due to the superior thermo-stability of its secreted enzymes.
Descritores: Proteínas Fúngicas/metabolismo
Lacase/metabolismo
Trametes/enzimologia
-Argentina
Temperatura
Estabilidade Enzimática
Proteínas Fúngicas/genética
Proteínas Fúngicas/química
Lacase/genética
Lacase/química
Trametes/isolamento & purificação
Trametes/genética
Responsável: BR1.1 - BIREME


  2 / 5 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-748250
Autor: Yan, Jinping; Chen, Yuhui; Niu, Jiezhen; Chen, Daidi; Chagan, Irbis.
Título: Laccase produced by a thermotolerant strain of Trametes trogii LK13
Fonte: Braz. j. microbiol;46(1):59-65, 05/2015. tab, graf.
Idioma: en.
Projeto: Yunnan Provincial Science and Technology Department.
Resumo: Thermophilic and thermotolerant micro-organisms strains have served as the natural source of industrially relevant and thermostable enzymes. Although some strains of the Trametes genus are thermotolerant, few Trametes strains were studied at the temperature above 30 °C until now. In this paper, the laccase activity and the mycelial growth rate for Trametes trogii LK13 are superior at 37 °C. Thermostability and organic cosolvent tolerance assays of the laccase produced at 37 °C indicated that the enzyme possessed fair thermostability with 50% of its initial activity at 80 °C for 5 min, and could remain 50% enzyme activity treated with organic cosolvent at the concentration range of 25%–50% (v/v). Furthermore, the test on production of laccase and lignocellulolytic enzymes showed the crude enzymes possessed high laccase level (1000 U g−1) along with low cellulose (2 U g−1) and xylanase (140 U g−1) activity. Thus, T. trogii LK13 is a potential strain to be applied in many biotechnological processes.
Descritores: Lacase/metabolismo
Trametes/enzimologia
Trametes/crescimento & desenvolvimento
-Análise por Conglomerados
DNA Fúngico/química
DNA Fúngico/genética
DNA Espaçador Ribossômico/química
DNA Espaçador Ribossômico/genética
Estabilidade Enzimática
Lacase/química
Microscopia
Dados de Sequência Molecular
Filogenia
Análise de Sequência de DNA
Solventes
Temperatura
Trametes/citologia
Trametes/efeitos da radiação
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


  3 / 5 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: lil-657620
Autor: Levin, Laura; Diorio, Luis; Grassi, Emanuel; Forchiassin, Flavia.
Título: Grape stalks as substrate for white rot fungi, lignocellulolytic enzyme production and dye decolorization / Uso del escobajo como sustrato para el crecimiento de hongos de la pudrición blanca, la producción de enzimas ligninolíticas y la decoloración de tinturas
Fonte: Rev. argent. microbiol;44(2):105-112, jun. 2012. graf, tab.
Idioma: es.
Resumo: The aim of this work was to evaluate the potential of grape stalks, an agroindustrial waste, for growth and lignocellulolytic enzyme production via solid-state fermentation, using the following three white rot fungi: Trametes trogii, Stereum hirsutum and Coriolus antarcticus. The decolorization of several dyes by the above mentioned cultures was also investigated. Similar values of dry weight loss of the substrate were measured after 60 days (33-43 %). C. antarcticus produced the highest laccase and Mn-peroxldase activities (33.0 and 1.6 U/g dry solid). The maximum endoglucanase production was measured in S. hirsutum cultures (10.4 U/g), while the endoxylanase peak corresponded to T. trogii (14.6 U/g). The C. antarcticus/grape stalk system seems potentially competitive in bioremediation of textile processing effluents, attaining percentages of decolorization of 93, 86, 82, 82, 77, and 58 % for indigo carmine, malachite green, azure B, remazol brilliant blue R, crystal violet and xylidine, respectively, in 5 h.

El objetivo de este trabajo fue evaluar el potencial del escobajo, un residuo agroindustrial, como sustrato para el crecimiento y la producción de enzimas lignocelulósicas de tres hongos causantes de pudrición blanca en la madera: Trametes trogii, Stereum hirsutum y Coriolus antarcticus. Para ello se utilizaron técnicas de fermentación en estado sólido. También se ensayó la decoloración de colorantes industriales sobre estos cultivos. La pérdida de peso seco del sustrato fue similar después del día 60 (33-43 %). C. antarcticus produjo las mayores actividades de lacasa y Mn-peroxidasa (33,0 y 1,6 U/g peso seco). La mayor actividad endoglucanasa fue medida en cultivos de S. hirsutum (10,4 U/g), y la mayor actividad endoxilanasa en T. trogii (14,6 U/g). El sistema C. antarcticus/escobap mostró un importante potencial para su aplicación en la biorremediación de efluentes textiles, con porcentajes de decoloración de 93, 86, 82, 82, 77 y 58 % para índigo carmín, verde de malaquita, azure B, azul R brillante de remazol, cristal violeta y xilidina, respectivamente, en 5 h.
Descritores: Biodegradação Ambiental
Basidiomycota/crescimento & desenvolvimento
Celulase/isolamento & purificação
Corantes/metabolismo
/isolamento & purificação
ENDO-1,ABBREVIATIONS AS TOPIC-BETA XYLANASES/isolamento & purificação
Proteínas Fúngicas/isolamento & purificação
Resíduos Industriais
Microbiologia Industrial/métodos
Lacase/isolamento & purificação
Lignina/metabolismo
Peroxidases/isolamento & purificação
Caules de Planta/microbiologia
Vitis/microbiologia
-Argentina
Basidiomycota/enzimologia
Celulase/metabolismo
Corantes/classificação
Coriolaceae/enzimologia
Coriolaceae/crescimento & desenvolvimento
/metabolismo
ENDO-1,ABBREVIATIONS AS TOPIC-BETA XYLANASES/metabolismo
Fermentação
Proteínas Fúngicas/metabolismo
Lacase/metabolismo
Peroxidases/metabolismo
Trametes/enzimologia
Trametes/crescimento & desenvolvimento
Tipo de Publ: Estudo Comparativo
Research Support, Non-U.S. Gov't
Responsável: AR1.2 - Instituto de Investigaciónes Epidemiológicas


  4 / 5 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: lil-591933
Autor: Erden, Emre; Kaymaz, Yasin; Pazarlioglu, Nurdan Kasikara.
Título: Biosorption kinetics of a direct azo dye Sirius Blue K-CFN by Trametes versicolor
Fonte: Electron. j. biotechnol;14(2):3-3, Mar. 2011. ilus, tab.
Idioma: en.
Resumo: In this study, lyophilized Trametes versicolor biomass is used as a sorbent for biosorption of a textile dye, Sirius Blue K-CFN, from an aqueous solution. The batch sorption was studied with respect to dye concentration, adsorbent dose and equilibrium time. The effect of pH and temperature on dye uptake was also investigated and kinetic parameters were determined. Optimal initial pH (3.0), equilibrium time (2 hrs), initial dye concentration ( 100 mg l-1) and biomass concentration (1.2 mg l-1) were determined at 26ºC. The maximum biosorption capacity (q max) of Sirius Blue K-CFN dye on lyophilized T. versicolor biomass is 62.62 mg/g. The kinetic and isotherm studies indicated that the biosorption process obeys to a pseudo-second order model and Langmuir isotherm model. In addition, the biosorption capacities of fungal biomass compared to other well known adsorbents such as activated carbon and Amberlite, fungal biomass biosorptions capacities were found to be more efficient.
Descritores: Trametes/química
-Biomassa
Basidiomycota/química
Corantes
Compostos Azo/química
Liofilização
Concentração de Íons de Hidrogênio
Isoterma
Cinética
Temperatura
Responsável: CL1.1 - Biblioteca Central


  5 / 5 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
Id: lil-590632
Autor: Fernández, Jorge Andrés; Henao, Lina María; Pedroza Rodríguez, Aura Marina; Quevedo Hidalgo, Balkys.
Título: Inmovilización de hongos ligninolíticos para la remoción del colorante negro reactivo 5 / Immobilising lignilolytic fungus for removing reactive black 5 dye
Fonte: Rev. colomb. biotecnol;11(1):59-72, jul. 2009. tab, graf.
Idioma: es.
Resumo: La presencia de colorantes azoicos en aguas residuales de la industria textil es un problema ambiental y sanitario, porque muchos de estos compuestos son cancerígenos. Los tratamientos biológicos son una alternativa para la remoción de ese tipo de colorantes. En el presente trabajo se evaluó el efecto de tres hongos de podredumbre blanca, Trametes versicolor, Pleurotus ostreatus y Phanerochaete chrysosporium sobre la decoloración de un agua que contiene colorante negro reactivo 5 (NR5), ampliamente usado en la industria textil. Se estudió la inmovilización de estos hongos en dos soportes, espuma de poliuretano y estropajo (L. cylíndrica) para seleccionar el mejor soporte y el hongo con mayor capacidad para la decoloración. Ambos soportes fueron igualmente efectivos, pero se seleccionó estropajo por ser un producto natural. El hongo que generó los mayores porcentajes de decoloración en 4 días fue Trametes versicolor, con 96%, 98% y 98% para agua con concentración de NR5 300 ppm, 150 ppm y 75 ppm, respectivamente. La actividad lacasa para cada concentración de NR5 fue 8 U L-1, 7 U L-1 y 5 U L-1.

Waste water from the textile industry represents a major environmental and health problem because it contains azo dyes whose carcirogenic effect has been tested in research. Biological treatment represents a valuable alternative for removing these dyes. The effect of Trametes versicolor, Pleurotus ostreatus and Phanerochaete chrysosporium rot fungi on decoloration of water containing reactive black five (NR5) textile dye was evaluated in this work. Immobilising the fungi on polyurethane foam and luffa sponge (Luffa cylindrica) supports was studied in order to select the best support and the fungi having the best decolorisation. Both supports were equally effective; however, the luffa sponge was selected as being a natural product. Trametes versicolor produced the highest decolorisation percentages in four days (96%, 98% and 98% for 300 ppm, 150 ppm and 75 ppm NR5 concentrations, respectively) while lacase enzyme activity was 8 UL-1, 7 UL-1 and 5 UL-1 for each of them.
Descritores: Trametes/classificação
Trametes/química
Trametes/virologia
Responsável: CO326 - Departamento de Biología



página 1 de 1
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde