Dondurulmuş Gıdaların Çözündürülmesinde Alternatif Bir Yöntem: Ohmik Çözündürme

Dondurulmuş gıdaların çözündürülmesi gıdanın fiziksel, kimyasal ve mikrobiyolojik özelliklerin en az şekilde kaybın olması açısından kritik bir işlem olarak bilinmektedir. Geleneksel çözündürme işlemine alternatif olarak geliştirilen ohmik çözündürme işleminde gıda maddesinden elektrik akımının geçirilmesi ve gıdanın elektriksel direnç olarak kullanılmasıyla kısa sürede ve tekdüze çözünme işlemi gerçekleştirilmektedir. Yapılan çalışmalarda geleneksel çözündürme işlemine kıyasla işlem süresinin kısaldığı ve bazı kalite özelliklerindeki değişim üzerine daha olumlu sonuçlar verdiği ortaya koyulmuştur. Bu derleme çalışmasında dondurulmuş gıdaların ohmik çözündürülmesi amacıyla geliştirilen sistemlerin tasarım özellikleri ve işlemin çözünmüş gıdaların kalite özelliklerindeki değişim üzerine etkileri derlenmiş ve tartışılmıştır.

An Alternative Method for Thawing of Frozen Foods: Ohmic Thawing

Thawing for frozen foods is known as a critical process in maintaining minimum loss in physical, chemical and microbiological properties of foods. Ohmic thawing process, which is developed as an alternative method to conventional thawing, has short processing time and provides uniform temperature distribution by the means of the passage of electrical current through foodstuff with electrical resistance. Studies on ohmic thawing have revealed that thawing time can be reduced, and some quality attributes can be improved in comparison to conventional thawing. In this present study, design properties of systems developed for the purpose of ohmic thawing and the effect of this process on changes of quality properties of frozen foods are reviewed.

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Jeremiah, L., 1996. Freezing effects of food quality. New York, New York, USA: Marcel Dekker Inc.
Rahman, M., Machado-Velasco, K., Sosa-Morales, M., Velez-Ruiz, J., 2009. Freezing Point: Measurement, Data,and Prediction. In M. Rahman (Ed.), Food Properties Handbook. CRC Press,Boca Raton, FL, USA. 859 p.
Kiani, H., Sun, D-W., 2011. Water crystallization and its importance to freezing of foods: A review. Trends in Food Science & Technology 22(8): 407- 426.
Anonymous., 2013. Big Thaw. from http://www.fsis.usda.gov/wps/portal/fsis/topics/food -safety-education/get-answer/food-safety-fact- sheets/safe-food-handling/the-big-thaw-safe- defrosting-methods-for-consumer/bigthaw2
Bozkurt, H., Icier, F., 2012. Ohmic thawing of frozen beef cuts. Journal of Food Process Engineering 35(1): 16-36.
Çelebi, C., İçier, F., 2014. Ohmic thawing of frozen ground meat. Journal of Food Process Engineering 46: 121-125.
Bozkır, H., Baysal, T., Rayman Ergün, A., 2014. Gıda endüstrisinde uygulanan yeni çözündürme teknikleri. Akademik Gıda 12(3): 38-44.
Icier, F., Izzetoglu, GT., Bozkurt, H., Ober, A., 2010. Effects of ohmic thawing on histological and textural properties of beef cuts. Journal of Food Engineering 99(3): 360-365.
Li, B., Sun, DW., 2002. Novel methods for rapid freezing and thawing of foods - A review. Journal of Food Engineering 54(3): 175-182.
Baysal, T., İçier, F., Baysal, A.H., 2011. Güncel Elektriksel Isıtma Yöntemleri. İzmir: Sidas Yayınları.
Cheng, Q., Koziel, S., Bandler, J., 2006. Simplified space-mapping approach to enhancement of microwave device models. International Journal of RF and Microwave Computer-Aided Engineering 16(5): 518-535.
Sarang, S., Sastry, S.K., Knipe, L., 2008. Electrical conductivity of fruits and meats during ohmic heating. Journal of Food Engineering 87(3): 351- 356.
Balaban, M., Henderson, T., Teixeira, A., Otwell, W., 1994. Ohmic thawing of shrimp blocks. In Developments in Food Engineering (pp. 307-309). USA: Springer.
Icier, F., Ilicali, C., 2005. Temperature dependent electrical conductivities of fruit purees during ohmic heating. Food Research International 38(10): 1135-1142.
Ghnimi, S., Flach-Malaspina, N., Dresch, M., Delaplace, G., Maingonnat, JF., 2008. Design and performance evaluation of an ohmic heating unit for thermal processing of highly viscous liquids. Chemical Engineering Research and Design 86: 626-632.
Min, S-G., Hong, G-P., Chun, J-Y., Park, S.H., 2015. Pressure Ohmic Thawing: a Feasible Approach for the Rapid Thawing of Frozen Meat and Its Effects on Quality Attributes. Food and Bioprocess Technology 1-12.
Sastry, SK., Heskitt, BF., Sarang, SS., Somavat, R., Ayotte, K., 2014. Why Ohmic Heating? Advantages, Applications, Technology, and Limitations. In H. Ramaswamy, M. Marcotte, S. Sastry, & K. Abdelrahim (Eds.), Ohmic Heating in Food Processing. CRC Press.
Ohtsuki, T., 1991. Process for thawing foodstuffs. US Patent 5,034,236.
Ohtsuki, T., 1991. Process for thawing foodstuffs. U.S. patent 5,034,236.
Luzuriaga, DA., Balaban, MO., 1996. Electrical Conductivity of Frozen Shrimp and Flounder at Different Temperatures and Voltage Levels. Journal of Aquatic Food Product Technology 5(3): 41-63.
Roberts, JS., Balaban, MO., Zimmerman, R., Luzuriaga, D., 1998. Design and testing of a prototype ohmic thawing unit. Computers and Electronics in Agriculture 19(2): 211-222.
Yun, C., Lee, D., Park, J., 1998. Ohmic thawing of a frozen meat chunk. Korean Journal of Food Science and Technology 30(4): 842-847.
Roberts, J.S., Balaban, M.O., D.A., L., 2002. Comparison of quality attributes of ohmic and water ımmersion thawed shrimp. Journal of Aquatic Food Product Technology11(2): 3-11.
Çokgezme, Ö., 2014. Küp Şeklinde Dondurulmuş Patateslerin Yeni Alternatif Yöntemlerle Çözündürülmesi. Bitirme Tezi. Ege Üniversitesi Gıda Mühendisliği Bölümü, İzmir.
Seyhun, N., Ramaswamy, H.S., Zhu, S., Sumnu, G., Sahin, S., 2012. Ohmic tempering of frozen potato puree. Food and Bioprocess Technology 6(11): 3200-3205.