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    Biochemical and Functional Relationships in Cheese.

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    Author
    Guinee, Timothy P.
    Fox, P.F.
    Fenney, E.P
    Mullins, C.
    Corcoran, M.O.
    Mulholland, E.
    Auty, Mark
    Keyword
    Mozzarella
    Cookery applications
    heat-related functional attributes
    Emmental
    Pizza
    Date
    2001-01-01
    
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    URI
    http://hdl.handle.net/11019/1285
    Citation
    Guinee, T.P., Fox, P.F., Feeney, E.P., Mullins, C., Corcoran, M., Mulholland, E., Auty, M., Biochemical and Functional Relationships in Cheese, End of Project Reports, Teagasc, 2001.
    Abstract
    Cheese is used extensively in cooking applications, mainly because of its flavour and heat-induced functionality, which is a composite of different attributes such as softening, flow and stretch. The functional attributes of cooked cheese generally have a major impact on the quality of foods in which cheese is included as an ingredient, e.g. pizza pie. Owing to its importance in cookery applications, numerous studies have been undertaken on the effects of different factors on the age-related changes in the functionality of cooked cheese, especially Mozzarella, and to a lesser extent, Cheddar and processed cheese. These studies have shown that the functionality of natural cheese is dynamic, with the different functional attributes undergoing marked changes during ripening, and, for a given cheese variety, the desired functional attributes are optimum within a specific time frame during maturation. The time at which the cheese becomes functional and the width of the window - and hence the functional shelf-life, are affected by the extent of chemical changes, including the increase in proteolysis and the ratio of bound to free moisture. The main aims of this project were to investigate the effects of the following on the age-related changes in heat-related functional attributes (e.g. stretchability, fluidity) of cheese: * fat reduction, * the degree of fat emulsification, * the pH and calcium content and their interaction, * the correlation between proteolysis and functional attributes, especially attributes other than flowability, e.g. rheological properties of raw cheese, stretchability of heated cheese, and * the age-related changes in the functionality of cheeses other than Mozzarella, e.g. analogue pizza cheese and Emmental. At the outset of this project, comparatively little information was available on the effects of the above parameters on the age-related changes in heatinduced functional attributes (e.g. stretchability, fluidity) of cheese, especially for varieties other than Mozzarella.
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