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	Provedor de dados ArchiMer (4) Autor Le Roux, Karine (4) Baron, Regis (3) Kaas, Raymond (3) Arhaliass, A. (2) Berge, Jean-pascal (2) Socol, Marius (2) Arhaliass, Abdellah (1) Bruzac, Sandrine (1) Del Pino, J. Rodriguez (1) Donnay-moreno, Claire (1) Legrand, Jack (1) Rodriguez Del Pino, J. (1) Vauchel, Peggy (1) Mais... Palavra-chave Acidic enzymatic proteolysis (2) Bio-refinery (2) Shrimp cuticles (2) Alginate (1) Alkaline extraction kinetics (1) Chitin (1) Chitine (1) Cinétique (1) Coproduits de crustacés (1) Crustacean by-products (1) Demineralization (1) Demineralization kinetics and modeling (1) Deproteinization (1) Déminéralisation (1) Déprotéinisation (1) Enzymatic hydrolysis (1) Extraction (1) Hydrolyse enzymatique (1) Kinetic (1) Laminaria digitata (1) Mais... Tipo do documento Text (4) Ano 2017 (1) 2015 (1) 2012 (1) 2009 (1) País France (4) Idioma Inglês (3) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Elements for optimizing a one-step enzymatic bio-refinery process of shrimp cuticles: Focus on enzymatic proteolysis screening ArchiMer Baron, Regis; Socol, Marius; Kaas, Raymond; Arhaliass, A.; Rodriguez Del Pino, J.; Le Roux, Karine; Donnay-moreno, Claire; Berge, Jean-pascal. This article complements an earlier work published in 2015 Baron et al. (2015) that showed the interest of a shrimp shells bio-refining process. We compare here the effect of eleven commercial proteases at pH 3.5 or 4.0 on a residual amount of shrimp shells proteins after 6 hours at 50 °C. The two pH are obtained when respectively 40 and 25 mmol of formic acid are added to 5 g of mild dried shell. Deproteinisation yield above 95% are obtained. Residual amino acids profile in the solid phase was identical for the eleven proteases except for pepsin which was similar to the raw material profile. A significant relative increase in the proportion of Glycine is observed for the ten other cases. Likewise, shapes of size exclusion chromatograms of the dissolved... Tipo: Text Palavras-chave: Bio-refinery; Shrimp cuticles; Acidic enzymatic proteolysis. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00388/49957/50530.pdf Kinetic study of solid phase demineralization by weak acids in one-step enzymatic bio-refinery of shrimp cuticles ArchiMer Baron, Regis; Socol, Marius; Arhaliass, A.; Bruzac, Sandrine; Le Roux, Karine; Del Pino, J. Rodriguez; Berge, Jean-pascal; Kaas, Raymond. We describe a one-step bio-refinery process for shrimp composites by-products. Its originality lies in a simple rapid (6 h) biotechnological cuticle fragmentation process that recovers all major compounds (chitins, peptides and minerals in particular calcium). The process consists of a controlled exogenous enzymatic proteolysis in a food-grade acidic medium allowing chitin purification (solid phase), and recovery of peptides and minerals (liquid phase). At a pH of between 3.5 and 4, protease activity is effective, and peptides are preserved. Solid phase demineralization kinetics were followed for phosphoric, hydrochloric, acetic, formic and citric acids with pKa ranging from 2.1 to 4.76. Formic acid met the initial aim of (i) 99 % of demineralization yield... Tipo: Text Palavras-chave: Bio-refinery; Acidic enzymatic proteolysis; Shrimp cuticles; Demineralization kinetics and modeling. Ano: 2015 URL: http://archimer.ifremer.fr/doc/00281/39244/37809.pdf Kinetics modeling of alginate alkaline extraction from Laminaria digitata ArchiMer Vauchel, Peggy; Le Roux, Karine; Kaas, Raymond; Arhaliass, Abdellah; Baron, Regis; Legrand, Jack. Alginates being depolymerized during their alkaline extraction, reducing extraction time could help producing higher rheological quality alginates. The purpose of the present work is to study fresh Laminaria digitata destructuration during alkaline extraction and its link to extraction kinetics. Both alginate extraction yield and mean diameter of algae particles were followed for different values of agitation level and initial size of algae pieces. Results highlighted the existence of a link between extraction yield and algal destructuration. Those elements and the specificity of L. digitata structure have been taken into account to propose a kinetics model based on a fluid-particle reaction with decreasing size particles. The model parameters have been... Tipo: Text Palavras-chave: Model; Laminaria digitata; Alkaline extraction kinetics; Alginate. Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6315.pdf Purification de la chitine par hydrolyse enzymatique à partir de coproduits de crevette Penaeus vannamei. Caractérisations des produits et optimisation du procédé ArchiMer Le Roux, Karine. The objective of this study was to optimize the extraction of chitin by acid proteolysis. The novelty of the method is based on the stabilization of pH by the balance between substrate composition and the acid solvent. This principle allows a simultaneous demineralization and deproteinization, the two main reactions associated with the purification of chitin. To evaluate the performance of this purification, the composition of the substrate and products was characterized. Different methods of quantification of chitin and proteins have been compared. As traditional assays were not satisfaying, a direct method of amino acids determination by gaz chromatography was selected to estimate the amount of protein. The estimate of chitin amount was based on indirect... Tipo: Text Palavras-chave: Coproduits de crustacés; Hydrolyse enzymatique; Protéolyse; Chitine; Extraction; Cinétique; Déminéralisation; Déprotéinisation; Crustacean by-products; Enzymatic hydrolysis; Proteolysis; Chitin; Extraction; Kinetic; Demineralization; Deproteinization. Ano: 2012 URL: http://archimer.ifremer.fr/doc/00087/19828/17470.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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