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      INMOVILIZACIÓN DE LIPASA de Candida antarctica SOBRE SOPORTES DE QUITOSANO-GELATINA Translated title: IMOBILIZAÇÃO DA LIPASE DE Candida antarctica EM SUPORTES DE QUITOSANA-GELATINA Translated title: IMMOBILIZATION OF LIPASE FROM Candida antarctica ON CHITOSAN-GELATIN SUPPORTS

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          Abstract

          Se preparó una serie de películas de quitosano-gelatina variando la relación de los constituyentes, quitosano-gelatina entre 1:2, 1:5 y 1:10, con concentración total de biopolímeros entre 3,0%, 3,5%, 4,0% y pH de 5,5. Se deshidrataron los soportes por crioconcentración (congelaciones descongelaciones sucesivas) y secado convectivo con aire. La inmovilización de lipasa de Candida antarctica se realizó sobre un hidrogel entrecruzado iónicamente con quitosano por atrapamiento y por adsorción; los mejores resultados en cuanto a actividad enzimática y reutilización del soporte se obtuvieron con el método por atrapamiento. Se llevaron a cabo pruebas de caracterización fisicoquímica de los soportes, actividad del sistema biocatalítico y estabilidad.

          Translated abstract

          Uma serie de filmes de gelatina quitosana foi preparada variando a proporção dos componentes, a quitosana-gelatina entre 01:02, 01:05 e 01:10, com concentração total de biopolímeros de 3,0%, 3,5% 4,0% e pH de 5,5. Realizou-se a desidratação dos suportes por crioconcentração (ciclos sucessivos de descongelamento-congelamento) e secagem por convecção com o ar. A imobilização de lipase de Candida antarctica foi realizada em um hidrogel ionicamente entrecruzado com quitosana por adsorção e atrapamento, obtendo os melhores resultados em termos de atividade enzimática e reutilização do suporte com o método de atrapamento. Foram realizados testes de caracterização físico-química dos suportes, da atividade do sistema biocatalítico e da estabilidade.

          Translated abstract

          A set of chitosan-gelatin films were prepared by varying the chitosan-gelatin ratio between 1:2, 1:5 and 1:10, with total concentration of biopolymers from 3,0% 3,5%, 4,0 and pH of 5,5. We carried out the dehydration of the supports through cryoconcentration (successive freeze thawing) and convective drying with air. Immobilization of lipase from Candida antarctica was performed on an ionically crosslinked hydrogel with chitosan by entrapment and adsorption, getting the best results in terms of enzymatic activity and reuse of the support with the entrapment method. Tests of physicochemical characterization of the supports, biocatalytic system activity and stability were carried out.

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          Most cited references29

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          Application of chitosan-based polysaccharide biomaterials in cartilage tissue engineering: a review.

          Once damaged, articular cartilage has very little capacity for spontaneous healing because of the avascular nature of the tissue. Although many repair techniques have been proposed over the past four decades, none has sucessfully regenerated long-lasting hyaline cartilage tissue to replace damaged cartilage. Tissue engineering approaches, such as transplantation of isolated chondrocytes, have recently demonstrated tremendous clinical potential for regeneration of hyaline-like cartilage tissue and treatment of chondral lesions. As such a new approach emerges, new important questions arise. One of such questions is: what kinds of biomaterials can be used with chondrocytes to tissue-engineer articular cartilage? The success of chondrocyte transplantation and/or the quality of neocartilage formation strongly depend on the specific cell-carrier material. The present article reviews some of those biomaterials, which have been suggested to promote chondrogenesis and to have potentials for tissue engineering of articular cartilage. A new biomaterial, a chitosan-based polysaccharide hydrogel, is also introduced and discussed in terms of the biocompatibility with chondrocytes.
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            Structure and interactions in covalently and ionically crosslinked chitosan hydrogels for biomedical applications

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              A comprehensive review of nanofiltration membranes:Treatment, pretreatment, modelling, and atomic force microscopy

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                Author and article information

                Journal
                rcq
                Revista Colombiana de Química
                Rev.Colomb.Quim.
                Departamento de Química, Universidad Nacional de Colombia. (Bogotá, Distrito Capital, Colombia )
                0120-2804
                2357-3791
                August 2011
                : 40
                : 2
                : 149-164
                Affiliations
                [02] Manizales orgnameUniversidad Nacional de Colombia, sede Manizales orgdiv1Departamento de Física y Química orgdiv2Instituto de Biotecnología y Agroindustria Colombia
                [01] Bogotá D.C orgnameUniversidad Nacional de Colombia orgdiv1Facultad de Ingeniería orgdiv2Departamento de Ingeniería Química Colombia
                Article
                S0120-28042011000200002 S0120-2804(11)04000202
                557de6c4-71e3-4d7e-93e6-6a922ccb0087

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 15 March 2011
                : 09 September 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 29, Pages: 16
                Product

                SciELO Colombia

                Self URI: Texto completo solamente en formato PDF (ES)
                Categories
                Aticulos originales de investigación

                Imobilização,sistema biocatalítico,actividad enzimática,adsorción,atrapamiento,gel iónico,lipasa de Candida antarctica,quitosano,gelatina,inmovilización,biocatalytic system,enzymatic activity,adsorption,trapping,ionic gel,lipase from Candida Antarctica,chitosan,gelatin,Immobilization,atividade enzimática,adsorção,atrapamento,lipase de Candida antarctica,quitosana

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