Navegando por Assunto "Pleurotus ostreatus"

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Acesso aberto (Open Access)
Extrato polissacarídico de cogumelo Pleurotus ostreatus pode melhorar as propriedades tecnológicas do filme de gelatina de peixe
(Universidade Federal do Pará, 2020-02-19) FREITAS, Maurício Madson dos Santos; LOURENÇO, Lúcia de Fátima Henriques; http://lattes.cnpq.br/7365554949786769
The aim of this papert was to evaluate the influence of the polysaccharide extract (POP) obtained from the mushroom Pleurotus ostreatus on the technological properties of fish gelatin films. The optimization conditions of this study were: 3.0% gelatin (GA), 6.26% plasticizer and 1.0% polysaccharide extract (POP). Under these conditions it was possible to obtain values of 5.30x10-11 g.m.m-2, s-1.Pa-1 of WPV, 17.78% of tensile strength and 15.56% of elongation. The optimal film (POP-GA) showed antioxidant activity, adequate visual and structural characteristics, as demonstrated by FTIR, XDR and SEM analyzes. Therefore, the technological properties found in the film with polysaccharide extract and gelatin, have potential for application in the food industry, as well as in the pharmaceutical industry.
Acesso aberto (Open Access)
Obtenção de Extratos Polissacarídicos do Cogumelo Comestível Pleurotus Ostreatus com tecnologia de fluido supercrítico
(Universidade Federal do Pará, 2020-03-13) BARBOSA, Jhonatas Rodrigues; BARBOSA, Jhonatas Rodrigues; http://lattes.cnpq.br/2588425611542447
The present dissertation proposal sought to develop an efficient method for recovery of extracts rich in polysaccharides from the edible mushroom Pleurotus ostreatus using binary system with hot water and supercritical CO2. The dissertation was structured in two interconnected chapters. Chapter I is a published article of review bibliographic, in which the latest findings of the literature on the subject are addressed clearly and factually, emphasizing the development of new extraction techniques, biological potential, and new technologies. Chapter II is a research article, where the main findings about the extraction and characterization process of a fraction rich in polysaccharides are displayed. The results show that the technology and process developed were efficient for recovery with a high yield of extracts rich in polysaccharides. In addition, research has shown that the extracts are a mixture of heteropolysaccharides, β-glucans, α-glucans, and oligosaccharides. The extract with the best extraction condition has high antioxidant activity, does not have cytotoxic effects, and has cytoprotective activity against free radicals. Thus, the method developed to recover extracts rich in polysaccharides is efficient, environmentally friendly and has potential for industrial implementation.