Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6759
Título: Relationship between solubility of freeze-dried skim milk and death of freeze-dried Lactobacillus delbrueckii ssp. bulgaricus during storage
Autor: Carvalho, A. Sofia
Joana, Silva
Ho, P.
Paula, Teixeira
Malcata, F. X.
Gibbs, P.
Data: 2007
Editora: Milchwissenschaft
Citação: "Milchwissenschaft- Milk Science International". ISSN 0026-3788. 62: 2 (2007) 148-150
Resumo: To elucidate the relationship between death of freeze-dried cells of Lactobacillus bulgaricus during storage and decrease in powder solubility, the effect of milk precipitation during rehydration of freeze-dried Lb. delbrueckiissp. bulgaricus upon death of these cells throughout storage, via addition of various carbohydrates to the drying medium was studied. The degree of survival of freeze-dried Lb. bulgaricus was found to be directly proportional to the square root of the absorbance of the supernatant. A darker powder resulted when most of the microorganism had died. A tentative explanation for the insolubility observed when the viability of the cells decreased is based on an increase in the extent of non-enzymatic browning (Maillard reactions), as a result of cell death. Results obtained throughout this study might represent a helpful tool towards development of a novel, straightforward, shortcut method for monitoring the viability of freeze-dried samples during storage
Peer review: yes
URI: http://hdl.handle.net/10400.14/6759
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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