Food Preservation
Code
10755
Academic unit
Faculdade de Ciências e Tecnologia
Department
Departamento de Ciências e Tecnologia da Biomassa
Credits
6.0
Teacher in charge
Ana Luísa Almaça da Cruz Fernando, Benilde Simões Mendes
Weekly hours
4
Total hours
56
Teaching language
Português
Objectives
Acquisition of knowledge, skills and proficiency (1) Main causes for food disturbance and their mechanisms and (2) The processes of food preservation.
Prerequisites
Basic expertise of biology, chemistry and biochemistry.
Subject matter
1- Food quality. Concept of useful life. High quality life (HQL) and product safety life (PSL).
2 - Main causes for food deterioration and related mechanisms. Enzimatic reactions. Chemical reactions. Biological modifications: a) due to the processed materials, b) resulting from external organisms.
3 - Presence of water in food. Importance of water on the food preservation. Physical ststes of the water. The concept of water activity and its interpretation. Constraints of the water activity concept, others concepts. Transient phenomena. The vitrea transition.
4 - Food preservation processes. Conventional processes. Processing emerging technologies.
Bibliography
Belitz, H. D.; Grosch, W.; Schieberle, P. (2009) Food Chemistry, Springer (Ed.), 4th Edition, 1070 pp, (ISBN 978-3540699354)
Fellows P. (2009) Food Processing and Technology. Principles and Practice (Food Science (Woodhead Publishing Technology and Nutrition), CRC Press (Ed.), 3rd Edition, 913 pp (ISBN 978 1439808214)
Wilkinson, V. M. and Gould, G. M. (1996) Food irradiation. A reference guide, Wilkinson, V. M. (Ed.), Woodhead Publishing Ltd (Pubs.), 180 pp (ISBN 978 1855733596)
Teaching method
Lectures sessions with datashow. Theoretical-practical sessions of aplications. Field trips.
Evaluation method
Approval with a minimum score of 9.5 (scale of 20).