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    Öğe
    Composition, proteolysis, lipolysis, volatile compound profile and sensory characteristics of ripened white cheeses manufactured in different geographical regions of Turkey
    (Elsevier Sci Ltd, 2018) Salum, Pelin; Govce, Gokce; Kendirci, Perihan; Bas, Deniz; Erbay, Zafer
    Turkish white cheese is the most important cheese variety made in Turkey and significant variations are commonly observed in their properties (mainly sensory). White cheese samples were collected from different geographical regions of Turkey and analysed to determine the common characteristics and to investigate the effects of the regional differences arising from differential natural conditions and the natural variations in raw milk. Although the samples showed similar compositional properties, there were significant variations in the ripening parameters and flavour attributes. Forty-five volatile compounds were identified and a descriptive vocabulary consisting of 15 common attributes were used to describe Turkish white cheese. Cheeses with moderate proteolytic ripening degrees and high lipolytic ripening values caused an increase in the preference score. Moreover, the increase in the volatile acid contents positively affected the preference. The most preferred cheeses were manufactured in two neighbouring provinces located in the north-west of the country. (C) 2018 Elsevier Ltd. All rights reserved.
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    Öğe
    Investigation of lipolytic and proteolytic ripening degrees of enzyme- modified dairy products manufactured in Turkey
    (Pamukkale Univ, 2017) Erbay, Zafer; Salum, Pelin; Govce, Gokce
    The usage of dairy products as flavor enhancer is recently increased in addition to the direct consumption. The specific flavor of dairy products, especially cheeses, can be obtained after long ripening processes. It is possible to mimic the ripening process and to develop specific flavor in a short time under controlled conditions by the aid of enzymatic reactions. These products which are named as enzyme-modified dairy products are widely used as food additive. Enzyme modified dairy products are recently begun to be produced in Turkey. However, the enzyme modified dairy products with traditional flavors have yet to be produced in Turkey. In the present study, 8 different enzyme-modified cheese (EMC) and 2 different enzyme-modified butter samples which were commercially manufactured in Turkey were supplied and the principle chemical properties, free fatty acid content & amounts, and proteolytic ripening degrees of them were analyzed. The EMCs produced with sheep and goat flavors had high amounts of proteolytic and lipolytic ripening degradation products, while EMC with Edam flavor had low amounts. It is detected that Parmesan and Cheddar EMCs had high proteolytic ripening degrees, whereas EMC with cheesy flavor came to the front with its high lipolytic ripening degree. It is concluded that varied proteolytic and lipolytic ripening degrees were achieved to produce different cheese flavors.