Influence of Chitosan Coating on Mechanical Stability of Biopolymer Carriers with Probiotic Starter Culture in Fermented Whey Beverages

Autor: Nataša S. Obradović, Tanja Ž. Krunić, Kata T. Trifković, Maja Lj. Bulatović, Marko P. Rakin, Marica B. Rakin, Branko M. Bugarski
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: International Journal of Polymer Science, Vol 2015 (2015)
Druh dokumentu: article
ISSN: 1687-9422
1687-9430
DOI: 10.1155/2015/732858
Popis: The aim of this study was to improve the mechanical stability of biopolymer carriers and cell viability with addition of chitosan coating during fermentation process and product storage. Dairy starter culture (1% (w/v)) was diluted in whey and mixed with sodium alginate solution and the beads were made using extrusion technique. The mechanical stability of coated and uncoated beads, the release behavior, and the viability of encapsulated probiotic dairy starter culture in fermented whey beverages were analyzed. The mechanical properties of the beads were determined according to force-displacement and engineering stress-strain curves obtained after compression testing. It was observed that addition of chitosan as a coating on the beads as well as the fermentation process increased the elastic modulus of the calcium alginate-whey beads and cell survival. The current study revealed that the coating did not significantly improve the viability of probiotics during the fermentation but had an important influence on preservation of the strength of the carrier during storage. Our results indicate that whey-based substrate has positive effect on the mechanical stability of biopolymer beads with encapsulated probiotics.
Databáze: Directory of Open Access Journals
Externí odkaz: