Selection of strais producing fungal chitosanase and kinetics

• Autor(a) principal: Santos, Everaldo Silvino dos
• Data de Publicação: 2011
• Outros Autores: Silva Filho, Raimundo Cosme, Santana, Sérgio Carvalho, Khan, Naveed Khan, Marcedo, Gorete Ribeiro
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/32594
• topic: Chitosan; Chitosanase; Kinetics; Aspergillusochraceus

In this work it was performed a selection of fungal strains able to grow in a specific medium containing chitosan (Chitosan Detector Agar) as the sole carbon source at 0.2%, and a kinetic study was performed to evaluate the best conditions for production of chitosanase from the best producing strain. The selection was made from five strains, previously isolated from soil. In the evaluation of kinetics was accompanied by cell concentration, the protein concentration (mg/mL), the enzyme activity (U/mL) for two volumes of fermentation broth (0.05 and 0.10 mL). The results showed a significant increase in all parameters studied in the first 12 hours of culture. Comparing the activity values for the two volumes of fermentation broth was observed that the volume of 0.05 mL broth showed enzymatic activity always greater than the volume of 0.1 mL