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Registros recuperados: 9
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BIOLOGICAL ASPECTS INVOLVED IN THE DEGRADATION OF ORGANIC POLLUTANTS J. Soil Sci. Plant Nutr.
Diez,M.C.
Worldwide use of pesticide has increased dramatically during the last two decades. As a consequence, pesticide residues and their transformation products are frequently found in groundwater and surface waters. This review summarizes information about polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), some chlorophenols; it mainly empathizes on pesticides, their incorporation into the environment, microorganisms involved in their degradation and, some physico-chemical aspects of pesticides behavior in soils. Details about residues of pesticides in groundwater and superficial water found in some foreign countries and in Chile are reported, as well. The fungal degradation of organic pollutants (xenobiotics) is considered as an...
Tipo: Journal article Palavras-chave: Biodegradation; White-rot fungi; Pesticides; Biobeds.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100004
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CHARACTERIZATION OF THE OXIDATIVE ENZYME POTENTIAL IN WILD WHITE ROT FUNGI FROM THE SUBTROPICAL FOREST OF MISIONES (ARGENTINA) Acta biol.Colomb.
FONSECA,María Isabel; ZAPATA,Pedro Darío; VILLALBA,Laura Lidia; FARIÑA,Julia Inés.
This research aimed to evaluate the potential of several native white rot fungi (WRF) isolated from subtropical environments of Misiones (Argentina) to produce different ligninolytic enzymes. Coriolus versicolor f. antarcticus BAFC 266, Pycnoporus sanguineus BAFC 2126 and Phlebia brevispora BAFC 633 showed the highest phenoloxidase activity. Ganoderma applanatum strain E, P. sanguineus BAFC 2126 and P. brevispora BAFC 633 revealed marked laccase and peroxidase activity. C. versicolor f. antarcticus, G. applanatum (strain A) and Trametes villosa, gave high positive reactions with 2,6-dimethoxyphenol oxidation at the lowest tested pH. C. versicolor f. antarcticus, G. applanatum strains D and F, T. elegans BAFC 2127and T. villosa, showed the highest manganese...
Tipo: Journal article Palavras-chave: Oxidative enzymes; Screening; White-rot fungi.
Ano: 2015 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100006
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Enhancement of ligninolytic enzyme activities in a Trametes maxima-Paecilomyces carneus co-culture: Key factors revealed after screening using a Plackett-Burman experimental design Electron. J. Biotechnol.
Chan Cupul,Wilberth; Heredia Abarca,Gabriela; Martínez Carrera,Daniel; Rodríguez Vázquez,Refugio.
Background In the industrial biotechnology, ligninolytic enzymes are produced by single fungal strains. Experimental evidence suggests that co-culture of ligninolytic fungi and filamentous microfungi results in an increase laccase activity. In this topic, only the ascomycete Trichoderma spp. has been studied broadly. However, fungal ligninolytic-filamentous microfungi biodiversity interaction in nature is abundant and poorly studied. The enhancement of laccase and manganese peroxidase (MnP) activities of Trametes maxima as a function of time inoculation of Paecilomyces carneus and under several culture conditions using Plackett-Burman experimental design (PBED) were investigated. Results The highest increases of laccase (12,382.5 U/mg protein) and MnP...
Tipo: Journal article Palavras-chave: Enzyme activity enhance; Fungal interaction; Paecilomyces carneus; Time inoculation; White-rot fungi.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000300002
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Estudio de la actividad lignocelulósica del hongo Pleurotus ostreatus sobre el rastrojo de cebada Colegio de Postgraduados
Luna Rodríguez, Lorena.
Este trabajo describe la evaluación del crecimiento del hongo ligninolítico Pleurotus ostreatus (cepas IE8 y CP50) sobre rastrojo de cebada suplementada con fuente de nitrógeno exógena (urea o sulfato de amonio) y humedades de 70 y 80 %; inicialmente se evaluó la velocidad de crecimiento radial (Vr) en cajas Petri y rastrojo de cebada. Las Vr más altas fueron 0.568 mm h-1 del testigo A (CP50, 80% de humedad, Medio con agua destilada) y 0.573 mm h-1 del tratamiento 6 (cepa IE8, 80% de humedad, Medio base). (Ver cuadro 5, pag. 23). Al adicionar una fuente de nitrógeno exógena las cepas no mejoran su Vr; sin embargo el 80% de humedad favoreció el Vr de ambas cepas. Con las condiciones antes mencionadas se eligió el hongo Pleurotus ostreatus (cepas...
Tipo: Tesis Palavras-chave: Hongos ligninolíticos; Enzimas exógenas; Fibra; Maestría; Ganadería; White-rot fungi; Exogenous enzymes; Fiber.
Ano: 2007 URL: http://hdl.handle.net/10521/1431
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Industrial and biotechnological applications of ligninolytic enzymes of the basidiomycota: A review Electron. J. Biotechnol.
Maciel,Márcia Jaqueline Mendonça; Silva,Ademir Castro e; Ribeiro,Helena Camarão Telles.
Ligninolytic enzymes of the basidiomycetes play a crucial role in the global carbon cycle. The demand for application of ligninolytic enzymes complexes of white-rot fungi in industry and biotechnology is ever increasing due to their use in a variety of processes. Ligninolytic enzymes have potential applications in a large number of fields, including the chemical, fuel, food, agricultural, paper, textile, cosmetic industrial sectors and more. This ligninolytic system of white-rot fungi is also directly involved in the degradation of various xenobiotic compounds and dyes. Their capacities to remove xenobiotic substances and produce polymeric products make them a useful tool for bioremediation purposes. This paper reviews the applications of ligninolytic...
Tipo: Journal article Palavras-chave: Laccase; Lignin peroxidase; Manganese peroxidase; White-rot fungi.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000600014
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PELLETIZATION OF Anthracophyllum discolor FOR WATER AND SOIL TREATMENT CONTAMINATED WITH ORGANIC POLLUTANTS R.C. Suelo Nutr. Veg.
Rubilar,O; Elgueta,S; Tortella,G; Gianfreda,L; Diez,MC.
Pellets of the white-rot fungus Anthracophyllum discolor with activated carbon and sawdust (complex pellets) were formulated for the degradation of lignin in water and the bioremediation of soil contaminated with pentachlorophenol (PCP). The complex pellets were formed by a center of activated carbon and sawdust surrounded by fungal mycelium, whereas simple pellets consisting of only mycelium were hollow spheres. Degradation of lignin was performed in an airlift reactor at initial lignin concentration of 1000 mg L-1 and the fungal pellets were re-used two times in batch operations. Complex pellets degraded lignin by 87 and 72% in the first and second cycle, respectively, and they were significantly more effective than simple pellets. In addition, complex...
Tipo: Journal article Palavras-chave: White-rot fungi; Lignin; Airlift reactor; Pentachlorophenol; Soils.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000300001
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Selection of white-rot fungi to formulate complex and coated pellets for Reactive Orange 165 decolourization Electron. J. Biotechnol.
Elgueta,Sebastián; Rubilar,Olga; Lima,Nelson; Diez,M. Cristina.
Six strains of white-rot fungi isolated from southern Chile were evaluated for their ergosterol/biomass correlation and ligninolytic potential in solid medium to formulate pellets for Reactive Orange 165 (RO165) decolourization. The fungus Anthracophyllum discolor was selected to formulate complex pellets (fungal mycelium, sawdust, and activated carbon), coated pellets (complex pellet + alginate) and simple pellets (fungal mycelium). The activity of ligninolytic enzymes (laccase, manganese peroxidase, manganese-independent peroxidase, and lignin peroxidase) was evaluated in both the complex and coated pellets in modified Kirk medium, and the morphology of the pellets was studied using scanning electron microscopy (SEM). Complex pellets of A. discolor...
Tipo: Journal article Palavras-chave: Complex pellets; Ligninolytic enzymes; RO165 decolourization; White-rot fungi.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000600008
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Solid-state bioconversion of passion fruit waste by whiterot fungi for production of oxidative and hydrolytic enzymes. Repositório Alice
ZILLY, A.; BAZANELLA, G. C. S.; HELM, C. V.; ARAÚJO, C. A. V.; SOUZA, C. G. M.; BRACHT, A.; PERALTA, R. M..
2011
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Enzima lignocelulósica; Fermentação sólida; Laccase; Ligninolytic enzymes; White-rot fungi; Solid-state fermentation.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/912761
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Tratamento de madeira de pinus utilizando bio-óleo de pirólise rápida. Repositório Alice
LOURENÇON, T. V.; MATTOS, B. D.; CADEMARTORI, P. H. G. de; CLARO, F. C.; MAGALHAES, W. L. E..
O presente estudo teve por objetivo avaliar o potencial do bio-óleo oriundo de uma planta piloto de pirólise rápida como agente preservativo da madeira de Pinus taeda. Para isso a madeira foi impregnada com bio-óleo obtido a partir da pirólise rápida de finos de eucalipto. Neste procedimento utilizaram-se três cargas de bio-óleo: diluído para 10 (Pw10%), 50% (Pw50%) e puro (Pw100%). Após a impregnação, o bio-óleo revestiu a parede interna dos traqueideos e cobriu também as pontuações areoladas dos elementos celulares anatômicos da madeira de pinus. A perda de massa da amostra Pw10% inoculada com os fungos Trametes versicolor e Gloeophyllum trabeum foi 62 e 77% inferior a do material controle, respectivamente, o que significa que a resistência ao...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Tratamento; Bio-óleo; Pinewwod; Biodegradação; Podridão parda; Podridão branca; Preservação da Madeira; Resíduo; Eucalyptus; White-rot fungi; Brown-rot fungi; Decay resistance; Wood preservation.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1067187
Registros recuperados: 9
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