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Comparative Study
. 2006 May;89(5):1439-51.
doi: 10.3168/jds.S0022-0302(06)72212-3.

Probiotic cheese production using Lactobacillus casei cells immobilized on fruit pieces

Y Kourkoutas  1 , L Bosnea, S Taboukos, C Baras, D Lambrou, M Kanellaki
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Free article
Comparative Study

Probiotic cheese production using Lactobacillus casei cells immobilized on fruit pieces

Y Kourkoutas et al. J Dairy Sci. 2006 May.
Free article

Abstract

Lactobacillus casei cells were immobilized on fruit (apple and pear) pieces and the immobilized biocatalysts were used separately as adjuncts in probiotic cheese making. In parallel, cheese with free L. casei cells and cheese only from renneted milk were prepared. The produced cheeses were ripened at 4 to 6 degrees C and the effect of salting and ripening time on lactose, lactic acid, ethanol concentration, pH, and lactic acid bacteria viable counts were investigated. Fat, protein, and moisture contents were in the range of usual levels of commercial cheeses. Reactivation in whey of L. casei cells immobilized on fruit pieces after 7 mo of ripening showed a higher rate of pH decrease and lower final pH value compared with reactivation of samples withdrawn from the remaining mass of the cheese without fruit pieces, from cheese with free L. casei, and rennet cheese. Preliminary sensory evaluation revealed the fruity taste of the cheeses containing immobilized L. casei cells on fruit pieces. Commercial Feta cheese was characterized by a more sour taste, whereas no significant differences concerning cheese flavor were reported by the panel between cheese containing free L. casei and rennet cheese. Salted cheeses scored similar values to commercial Feta cheese, whereas unsalted cheese scores were significantly lower, but still acceptable to the sensory panelists.

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