Autor(es):
Lucena, Monalisa de Alencar ; Ramos, Igor Frederico da Silveira ; Geronço, Maurycyo Silva ; Araújo, Ricardo de ; Filho, Francisco Lopes da Silva ; Silva, Luís Manuel Lopes Rodrigues da ; Sousa, Rayran Walter Ramos de ; Ferreira, Paulo Michel Pinheiro ; Osajima, Josy Anteveli ; Silva-Filho, Edson Cavalcanti ; Rizzo, Márcia dos Santos ; Ribeiro, Alessandra Braga ; Costa, Marcilia Pinheiro da
Data: 2022
Identificador Persistente: http://hdl.handle.net/10400.14/38119
Origem: Veritati - Repositório Institucional da Universidade Católica Portuguesa
Assunto(s): Polysaccharide; Biopolymer; Dextran; Photostability; Mucoadhesiveness; Antimicrobial activity
Descrição
The present work aimed to characterize the exopolysaccharide obtained from water kefir grains (EPSwk), a symbiotic association of probiotic microorganisms. New findings of the technological, mechanical, and biological properties of the sample were studied. The EPSwk polymer presented an Mw of 6.35 x 10(5) Da. The biopolymer also showed microcrystalline structure and characteristic thermal stability with maximum thermal degradation at 250 degrees C. The analysis of the monosaccharides of the EPSwk by gas chromatography demonstrated that the material is composed of glucose units (98 mol%). Additionally, EPSwk exhibited excellent emulsifying properties, film-forming ability, a low photodegradation rate (3.8%), and good mucoadhesive properties (adhesion Fmax of 1.065 N). EPSwk presented cytocompatibility and antibacterial activity against Escherichia coli and Staphylococcus aureus. The results of this study expand the potential application of the exopolysaccharide from water kefir as a potential clean-label raw material for pharmaceutical, biomedical, and cosmetic applications.
