Biopulping
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. THE FUNGAL ABILITY FOR BIOBLEACHING/BIOPULPING/BIOREMEDIATION OF LIGNIN-LIKE COMPOUNDS OF AGRO-INDUSTRIAL RAW MATERIAL
Lignin is present in plant cell secondary wall, associated to carbohydrates preventing their efficient hydrolysis, and cellulose pulp manufacture basically consists in breaking down the middle lamella of plant cells, individualizing fibers such as cellulose from the other biopolymers. Different levels of lignocellulose are found in plant residues and they ca
Quím. Nova. Publicado em: 2017-09
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2. Uso de aditivos na biodegradação de madeira pelo fungo Ceriporiopsis subvermispora: efeito na peroxidação de lipídios dependente de manganês-peroxidase
Ceriporiopsis subvermispora is a selective fungus in the wood delignification and the most promising in biopulping. Through the lipid peroxidation initiated by manganese peroxidase (MnP), free radicals can be generated, which can act in the degradation of lignin nonphenolic structures. This work evaluated the prooxidant activity (based in lipid peroxidation)
Química Nova. Publicado em: 2012
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3. Mecanismos envolvidos na biodegradação de materiais lignocelulósicos e aplicações tecnológicas correlatas
The biodegradation of lignocellulosic materials is an important natural process because it is responsible for the carbon recycling. When induced under controlled conditions, this process can be used for technological applications such as biopulping, biobleaching of cellulosic pulps, pre-treatment for subsequent saccharification and cellulosic-ethanol product
Química Nova. Publicado em: 2011
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4. Estudo da produção de enzimas ligninolíticas por Ceriporiopsis subvermispora / Study of the prodution of ligninolytic enzymes by Ceriporiopsis subvermispora
This work involved the research and definition of the culture conditions that maximize the production of manganese peroxidase (MnP) and laccase (Lac) by C. subvermispora, a white-rot fungus studied in biopulping industrial processes. The study involved submerged or static cultures with immobilized mycelium in polyuretane foam in complex or defined medium, an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/09/2010
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5. Estudo do crescimento de Ceriporiopsis subvermispora em culturas submersas para a produção de inóculos destinados ao processo de biopolpação / Studies on the submerged culturing of Ceriporiopsis subvermispora for inocolum production used in biopulping processes
The present work evaluated suitable systems for producing Ceriporiopsis subvermispora mycelium in submerged cultures. Mycellium produced was used in subsequent inoculation of wood chips in biopulping processes. The development of appropriated technologies for producing large amounts of inoculum may be a key step in biopulping, since currently there are no es
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/08/2009
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6. Estudo sobre a redução de Fe3+ por extratos aquosos de cultivos de Ceriporiopsis subvermispora sobre madeira e sua relação com a peroxidação de lipídeos / Studies on Fe3+ reduction by aqueous extracts recovered from cultures of Ceriporiopsis subvermispora on wood and its correlation with lipid peroxidation
The present work is inserted in a broad study aiming to understand the chemical and biochemical mechanisms involved in wood biodegradation by Ceriporiopsis subvermispora. Particularly, the relationship between the Fe3+-reducing activity present in aqueous extracts recovered from Ceriporiopsis subvermispora cultures on wood with the initiation of linoleic aci
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/02/2009
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7. Desenvolvimento do processo de biopolpação de eucalipto em escala piloto para produção de polpas termomecânicas e quimiotermomecânicas / Development of the eucaliptus biopulping process in a pilot scale to produce thermomechanical and chemithermomechanical pulps
Na escala evolutiva dos processos de polpação de alto rendimento (PAR), a mais recente promessa é a biopolpação, ou seja, o pré-tratamento microbiológico do cavaco de madeira utilizado na polpação. Esse pré-tratamento tem o potencial de reduzir o consumo de energia necessária ao refino em até 38%, e ainda, ou consequentemente, melhorar importante
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/08/2008
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8. Identificação de transcritos de Ceriporiopsis subvermispora expressos nas fases iniciais da biodegradação da madeira / Identification of transcripts of Ceriporiosis subvermispora expressed during initial phases of wood biodegradation
Lignin is a heterogeneous and highly cross-linked macromolecule that is particularly resistant to biological degradation but some specialized fungi developed the ability to degrade this complex molecule. Most of these fungi belong to the basidiomycetes and are responsible for the white-rot decay processo One of them, Ceriporiopsis subvermispora, has been ext
Publicado em: 2006
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9. Estudo do sistema ligninolitico produzido por fungos sob diferentes condições de oxigenação
The ligninolytic system produced by fungi is currently of great interest because it has many environmental applications. Ligninolytic enzymes can be used for the treatment lignocellulosic wastes, biopulping, effluent treatment, etc., and one able to degrade a variety of organic pollutants. In the present work a study was made of the ligninolytic system of fi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/1997