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    AuthorBeresford, Tom (1)Donnelly, W.J. (1)Fitzgerald, Richard J. (1)Kelly, Alan L. (1)Lane, C.N. (1)Morgan, S.M. (1)Murphy, P.M. (1)O'Connor, Paula M. (1)O'Reilly, Conor (1)Ross, R Paul (1)View MoreSubject
    Cheese (1)
    Dairy industry (1)Food industry (1)
    Food safety (1)
    Functional foods (1)High Pressure Processing (HPP) (1)sodium caseinate (1)View MoreDate Issued
    2000 (1)

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    High Pressure Processing of Dairy Foods

    Donnelly, W.J.; Beresford, Tom; Lane, C.N.; Walsh-O'Grady, D.; O'Connor, Paula M.; Fitzgerald, Richard J.; Murphy, P.M.; O'Reilly, Conor; Morgan, S.M.; Ross, R Paul; et al. (Teagasc, 2000-09-01)
    The term High Pressure Processing (HPP) is used to describe the technology whereby products are exposed to very high pressures in the region of 50 - 800 MPa (500 - 8000 Atmospheres). The potential application of HPP in the food industry has gained popularity in recent years, due to developments in the construction of HPP equipment which makes the technology more affordable. Applying HPP to food products results in modifications to interactions between individual components, rates of enzymatic reactions and inactivation of micro-organisms. The first commercial HPP products appeared on the market in 1991 in Japan, where HPP is now being used commercially for products such as jams, sauces, fruit juices, rice cakes and desserts. The pioneering research into the application of HPP to milk dates back to the end of the 19th century. Application of HPP to milk has been shown to modify its gel forming characteristics as well as reducing its microbial load. HPP offers the potential to induce similar effects to those generated by heat on milk protein. Recent reports have also indicated that HPP could accelerate the ripening of cheese. Much of the Irish cheese industry is based on the production of Cheddar cheese, the ripening time for which can vary from 4 - 12 months or more, depending on grade. A substantial portion of the cost associated with Cheddar manufacture is therefore attributed to storage under controlled conditions during ripening. Thus, any technology which may accelerate the ripening of Cheddar cheese while maintaining a balanced flavour and texture is of major economic significance. While food safety is a dominant concern, consumers are increasingly demanding foods that maintain their natural appearance and flavour, while free of chemical preservatives. HPP offers the food industry the possibility of achieving these twin goals as this technology can lead to reduced microbial loads without detrimentally effecting the nutritional or sensory qualities of the product. The development of food ingredients with novel functional properties offers the dairy industry an opportunity to revitalise existing markets and develop new ones. HPP can lead to modifications in the structure of milk components, in particular protein, which may provide interesting possibilities for the development of high value nutritional and functional ingredients. Hence these projects set out to investigate the potential of HPP in the dairy industry and to identify products and processes to which it could be applied.
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