Navegando por Autor "Arimatéia Júnior, Humberto"
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Artigo Production of enzymes by paenibacillus chitinolyticus and paenibacillus ehimensis to obtain chitooligosaccharides(Springer, 2013-03-17) Santos, Everaldo Silvino dos; Araújo, Nathália Kelly de; Assis, Cristiane Fernandes de; Macedo, Gorete Ribeiro de; Farias, Louise Fonseca de; Arimatéia Júnior, Humberto; Pedrosa, Matheus de Freitas Fernandes; Pagnoncelli, Maria Giovana BinderObtaining oligosaccharides from chitosan has been the focus of several studies in the pharmaceutical, chemical, food, and medical areas, due to their functional properties. Here, we evaluated the production potential of biologically functional chitooligosaccharides using enzymes extracts produced by Paenibacillus chitinolyticus and Paenibacillus ehimensis. After 48 h of fermentation, these microorganisms were able to produce chitosanases, which generated oligomers with a degree of polymerization between dimers and hexamers. The maximum conversion of chitosan to oligomers was 99.2 %, achieved after 12 h incubation of chitosan with enzymes produced by P. ehimensis. The chitooligosaccharides generated were capable of scavenging the 2,2-diphenyl-1-picrylhydrazyl radical, reaching a maximum scavenging rate of 61 and 39 % when produced with P. ehimensis and P. chitinolyticus enzymes, respectively. The use of these enzymes in the crude form could facilitate their use in industrial applications