Pectinases
Mostrando 1-12 de 74 artigos, teses e dissertações.
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1. Aggressiveness of Fusarium oxysporum and Fusarium solani isolates to yerba-mate and production of extracellular enzymes
RESUMO A erva-mate (Ilex paraguariensis) tem grande importância socioeconômica na agricultura familiar do Sul do Brasil. A principal doença da erva-mate é a podridão-de-raízes causada por Fusarium spp. Pouco se sabe a respeito da fisiologia deste patógeno, principalmente quanto à agressividade associada à produção de enzimas extracelulares. Neste
Summa phytopathol.. Publicado em: 10/07/2019
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2. Commercial and non-commercial pectinase and cellulase on the enzymatic hydrolysis efficacy of rice husk and Tifton 85 hay
ABSTRACT. The aim of this study was to evaluate the action of commercial and non-commercial cellulase and pectinase on rice husk and Tifton 85 hay hydrolyses. The hydrolysis kinetics of the substrates with commercial cellulase and pectinase were evaluated and the hydrolysis at different temperature and agitation conditions was maximized using experimental de
Acta Sci., Anim. Sci.. Publicado em: 29/04/2019
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3. Study of the parameters used in the encapsulation of commercial pectinase in calcium alginate and its effect on its catalytic activity
Abstract Despite the high catalytic properties of pectinases, the utilization of free enzymes always presents some hindrances such as low stability, a difficulty for product recovery and the impossibility of continuous use. Enzyme encapsulation is one of the methods used to overcome these limitations; however, some kind of effect is expected to occur on its
Food Sci. Technol. Publicado em: 31/01/2019
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4. Stabilization of guava nectar with hydrocolloids and pectinases
Abstract The aim of this study was to stabilize guava nectar using hydrocolloids and/or enzymes, and evaluate the stability and the bioactive compounds content during storage. In general, there was a decrease in pH and an increase in titratable acidity and soluble solids of the nectars. During storage, it was observed that nectars with pectinase showed decr
Polímeros. Publicado em: 15/03/2018
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5. O bagaço de cana-de-açúcar como fonte de carbono para a produção de enzimas por fungos filamentosos
RESUMO O presente trabalho teve como objetivo avaliar a atividade enzimática de seis cepas de fungos filamentosos cultivados em meio liquido contendo 1% de bagaço de cana-de-açúcar como a única fonte de carbono. Todas as cepas fúngicas foram capazes de usar este resíduo agroindustrial, produzindo vários tipos de enzimas, como celulases, xilanases, am
Hoehnea. Publicado em: 2018-01
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6. Bioprospecção de Aspergillus seção Nigri em solo e serrapilheira da Mata Atlântica
RESUMO: A utilização dos fungos como fonte de enzimas vem adquirindo status de destaque nas mais variadas áreas industriais e comerciais, e os Aspergillus membros da seção Nigri possuem significativo potencial para produção de enzimas. Os objetivos deste estudo foram isolar e avaliar Aspergillus da seção Nigri de serrapilheira e solos do bioma Mata
Arq. Inst. Biol.. Publicado em: 17/11/2017
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7. Pectin lyase overproduction by Penicillium griseoroseum mutants resistant to catabolite repression
Abstract Expression of pectinolytic genes is regulated by catabolic repression limiting the production of pectin lyase (PL) if the natural inducer, pectin, is missing from the growth medium. Here, we report the isolation of Penicillium griseoroseum mutants resistant to 2-deoxy-d-glucose (DG) that show resistance to catabolite repression and overproduce PL. T
Braz. J. Microbiol.. Publicado em: 2017-07
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8. Characterization of pectinase activity for enology from yeasts occurring in Argentine Bonarda grape
Pectinolytic enzymes are greatly important in winemaking due to their ability to degrade pectic polymers from grape, contributing to enhance process efficiency and wine quality. This study aimed to analyze the occurrence of pectinolytic yeasts during spontaneous fermentation of Argentine Bonarda grape, to select yeasts that produce extracellular pectinase
Braz. J. Microbiol.. Publicado em: 2015-09
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9. Downstream processing of pectinase produced by Aspergillus niger in solid state cultivation and its application to fruit juices clarification
In this work, a protocol for the formulation of an enzyme concentrated product to be applied in fruit juice treatment is described. Downstream processing conditions for the recovery and concentration of pectinases produced by the new strain Aspergillus niger LB-02-SF in solid state cultivation were assessed. The solid-liquid ratio in the extraction step of p
Food Sci. Technol. Publicado em: 2015-04
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10. Mudanças nas pectinases, fibras dietéticas e índices físico-químicos relacionados ao sabor de frutos de cubiu durante a maturação
O objetivo deste estudo foi avaliar as mudanças na atividade de pectinases (pectinesterase e poligalacturonase), teor de fibras dietéticas (sólidos insolúveis em álcool, pectina e fibra total) e índices físico-químicos relacionados ao sabor (pH, acidez titulável, sólidos solúveis, relação Brix/acidez, açúcares redutores e não-redutores) de fr
Acta Sci., Agron.. Publicado em: 2015-04
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11. Application of enzymatic preparations to produce araçá pulp and juice
In the present study, the effect of pectinases on the production of pulp and juice of araçá and the presence of bioactive compounds were evaluated. An enzyme extract (EE) produced by Aspergillus niger LB-02-SF in solid state fermentation and the commercial enzyme Ultrazym®AFP-L were used in this study. After enzyme treatment with the EE preparation, the e
Food Sci. Technol. Publicado em: 2014-12
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12. Técnicas de bioinformática aplicadas ao estudo de poligalacturonases de fungos
Plant cell walls are composed of approximately 65% cellulose microfibrils and pectin. The latter is proteolytically degraded by the so-called pectinases enzymes (also known as pectinolytic enzymes). Pectinases may be either depolymerizing. They are produced by plants, filamentous fungi, bacteria, and yeast. Due to the wide commercial use of pectinase, one ha
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/04/2012