Consulta: subjectFacets:"White-rot fungi"
Registros recuperados: 11
Data/hora: 09/06/2024 00:45:18

Estudio de la actividad lignocelulósica del hongo Pleurotus ostreatus sobre el rastrojo de cebada
Provedor de dados: 32
Autores: 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

Selection of white-rot fungi to formulate complex and coated pellets for Reactive Orange 165 decolourization
Provedor de dados: 69
Autores: 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

Industrial and biotechnological applications of ligninolytic enzymes of the basidiomycota: A review
Provedor de dados: 69
Autores: 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

Enhancement of ligninolytic enzyme activities in a Trametes maxima-Paecilomyces carneus co-culture: Key factors revealed after screening using a Plackett-Burman experimental design
Provedor de dados: 69
Autores: 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

BIOLOGICAL ASPECTS INVOLVED IN THE DEGRADATION OF ORGANIC POLLUTANTS
Provedor de dados: 126
Autores: 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

Could basidiomycetes fungi be an alternative for the treatment of fibrous feedstuffs? application of enzymatic complexes and future prospects
Provedor de dados: 96
Autores: Rodrigues,Miguel António Machado; Bezerra,Rui Manuel Furtado; Dias,José Albino Gomes Alves; Guedes,Cristina Vitória de Miranda; Ferreira,Luis Miguel Mendes; Nunes,Fernando.
This presentation intends to make a brief description of the studies being investigated by our research group in the area valorization of fibrous feed utilizing the white-rot fungi (basidiomycetes fungi) enzyme complexes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Basidiomycetes fungi; Biological treatment; Fibrous feedstuff; Nutritional value; White-rot fungi.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300056

PELLETIZATION OF Anthracophyllum discolor FOR WATER AND SOIL TREATMENT CONTAMINATED WITH ORGANIC POLLUTANTS
Provedor de dados: 127
Autores: 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

CHARACTERIZATION OF THE OXIDATIVE ENZYME POTENTIAL IN WILD WHITE ROT FUNGI FROM THE SUBTROPICAL FOREST OF MISIONES (ARGENTINA)
Provedor de dados: 37
Autores: 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: Info:eu-repo/semantics/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

Decolorization of remazol brilliant blue R with laccase from Lentinus crinitus grown in agro-industrial by-products
Provedor de dados: 42
Autores: ALMEIDA,PATRÍCIA H.; OLIVEIRA,ANA CAROLINA C. DE; SOUZA,GENYFER P.N. DE; FRIEDRICH,JULIANA C.; LINDE,GIANI A.; COLAUTO,NELSON B.; VALLE,JULIANA S. DO.
ABSTRACT Lentinus crinitus is a white-rot fungus that produces laccase, an enzyme used for dye decolorization. Enzyme production depends on cultivation conditions, mainly agro-industrial by-products. We aimed to produce laccase from Lentinus crinitus with agro-industrial by-products for dye decolorization. Culture medium had coffee husk (CH) or citric pulp pellet (CP) and different nitrogen sources (urea, yeast extract, ammonium sulfate and sodium nitrate) at concentrations of 0, 0.7, 1.4, 2.8, 5.6 and 11.2 g/L. Enzymatic extract was used in the decolorization of remazol brilliant blue R. CH medium promoted greater laccase production than CP in all evaluated conditions. Urea provided the greatest laccase production for CH (37280 U/L) as well as for CP...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dye decolorization; Ligninolytic enzymes; Remazol brilliant blue R; White-rot fungi.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703463

A practical culture technique for enhanced production of manganese peroxidase by Anthracophyllum discolor Sp4
Provedor de dados: 52
Autores: Acevedo,Francisca; Pizzul,Leticia; Castillo,María del Pilar; Rubilar,Olga; Lienqueo,María Elena; Tortella,Gonzalo; Diez,María Cristina.
In this study, different growth conditions of Anthracophyllum discolor Sp4 including the effect of agitation, additions of lignocellulosic support, inducer and surfactant were evaluated on the MnP production in Kirk medium using a culture system made up of the tubes containing the glass bead . The highest MnP production (1,354 U/L on day 13) was obtained when the medium was supplemented with wheat grain and 0.25 mM MnSO4 as inducer, under static conditions at 30°C. Two isoenzymes were purified (35 and 38 kDa respectively). MnP presented a maximal activity in the pH range between 4.5 and 5.5, a relatively high temperature tolerance (50ºC) and a high catalytic activity for 2,6-dimethoxyphenol and hydrogen peroxide.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: White-rot fungi; Ligninolytic enzymes; Purification; Lignocellulosic material.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000600013

Production and characterization of tyrosinase activity in Pycnoporus sanguineus CCT-4518 crude extract
Provedor de dados: 58
Autores: Duarte,Lívia Teixeira; Tiba,Joyce Batista; Santiago,Mariângela Fontes; Garcia,Telma Alves; Bara,Maria Teresa Freitas.
Tyrosinase is an enzyme of industrial interest. The production and characterization of tyrosinase from P. sanguineus CCT-4518 were investigated. The selection of inductors, luminosity influence, inoculum size and type of culture medium on the production of tyrosinase and the effect of inhibitors on enzyme activity were performed. Optimum conditions for intracellular tyrosinase production was observed after 2 days using 0.15% L-tyrosine as inducer, in the presence of light, with inoculum size of 10 mycelium discs, using 2% malt extract broth medium, incubated at 30°C, and constant agitation of 150 rpm. Tyrosinase activity was completely inhibited by the addition of 6 mM salicylhydroxamic acid or phenylthiourea, however an inhibition of 4.15% was recorded by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pycnoporus sanguineus; White-rot fungi; Tyrosinase; MBTH; Biotechnology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100003