ITALIAN JOURNAL OF FOOD SCIENCE, cilt.18, sa.2, ss.139-149, 2006 (SCI-Expanded)
The effect of heat treatment and starter culture on proteolysis and lipolysis of Kulek cheese (raw milk cheese without starter culture, raw milk cheese with starter culture, and heat-treated milk cheese with starter culture) during ripening was examined. Heat-treated milk cheese with starter had lower pH, and higher titratable acidity and salt than the raw milk cheeses. Water-soluble and soluble nitrogen in 12% trichloroacetic acid levels were the highest in the cheeses made from heat-treated milk with starters. Conversely, soluble nitrogen in 5% phosphotungstic acid level was the highest in the cheeses made from raw milk with starters. Cheese made from heat-treated milk with starter had the lowest residual alpha(s)-and beta-casein content and the highest gamma-caseins and peptides. Heat treatment increased lipolysis significantly. Starter culture addition to the raw milk cheeses did not change the lipolysis.