Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/10004
Título: Evaluation of antimicrobial edible coatings from a whey protein isolate base to improve the shelf life of cheese
Autor: Ramos, Óscar L.
Pereira, J. O.
Silva, Sara I.
Fernandes, João C.
Franco, M. I.
Lopes-da-Silva, J. A.
Pintado, M. E.
Malcata, F. Xavier
Palavras-chave: Edible coating
Whey protein isolate
Antimicrobial compound
Cheese shelf life
Data: 2012
Editora: American Dairy Science Association
Citação: RAMOS, Óscar L. ...[et al.] - Evaluation of antimicrobial edible coatings from a whey protein isolate base to improve the shelf life of cheese. Journal of Dairy Science. ISSN 0022-0302. Vol. 95, n.º 11 (2012), p. 6282–6292.
Resumo: The objective of this work was to evaluate the effectiveness of antimicrobial edible coatings to wrap cheeses, throughout 60 d of storage, as an alternative to commercial nonedible coatings. Coatings were prepared using whey protein isolate, glycerol, guar gum, sunflower oil, and Tween 20 as a base matrix, together with several combinations of antimicrobial compounds—natamycin and lactic acid, natamycin and chitooligosaccharides (COS), and natamycin, lactic acid, and COS. Application of coating on cheese decreased water loss (~10%, wt/wt), hardness, and color change; however, salt and fat contents were not significantly affected. Moreover, the antimicrobial edible coatings did not permit growth of pathogenic or contaminant microorganisms, while allowing regular growth of lactic acid bacteria throughout storage. Commercial nonedible coatings inhibited only yeasts and molds. The antimicrobial edible coating containing natamycin and lactic acid was the best in sensory terms. Because these antimicrobial coatings are manufactured from food-grade materials, they can be consumed as an integral part of cheese, which represents a competitive advantage over nonedible coatings.
Peer review: yes
URI: http://hdl.handle.net/10400.14/10004
Versão do Editor: doi: 10.3168/jds.2012-5478
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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