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Food and Bioprocess Technology

, Volume 5, Issue 4, pp 1328–1339 | Cite as

Comparing the Effects of Microwave and Conventional Heating Methods on the Evaporation Rate and Quality Attributes of Pomegranate (Punica granatum L.) Juice Concentrate

  • Shima Yousefi
  • Zahra Emam-Djomeh
  • Sayed Mohammad Ali Mousavi
  • Gholam Reza Askari
Original Paper

Abstract

Pomegranate juice was concentrated by conventional heating and microwave heating at different operational pressures (12, 38.5, and 100 kPa), and their effects on evaporation rate and quality attributes of concentrated juice were investigated. The final juice concentration of 40° Brix was achieved in 140, 127, and 109 min at 100, 38.5, and 12 kPa, respectively, by using conventional heating. Applying microwave energy decreased required times to 118, 95, and 75 min. The changes in color, anthocyanin content, and antioxidant capacity during concentration processes were investigated. L*, a*, and b* parameters were measured to estimate the intensity of color loss. All Hunter color parameters decreased with time. Results showed that the degradation of color, anthocyanins, and antioxidant activity were more important in conventional heating compared to microwave heating method. Degradation rates increases by increasing process pressure. A first-order kinetics model was applied to modeling changes in total solid content, anthocyanin content, and antioxidant capacity.

Keywords

Pomegranate Evaporating rate Heating method Anthocyanin content Antioxidant capacity 

Notes

Acknowledgment

This research was founded by the Vice-Chancellor for Research, University of Tehran, Iran.

References

  1. Alvarez, L. D., & Dorantes, L. P. (2005). Blanching using microwave processing. In H. Schubert & M. Regier (Eds.), Microwave processing of foods. Cambridge: Woodhead Publishing Ltd.Google Scholar
  2. Anonymous. (2006). Statistical book of agricultural of Iran. Tehran: Iranian Statistical Centre.Google Scholar
  3. Anonymous. (2008). Hunter Lab versus CIE 1976 L*A*B*. In The basics of color perception and measurement (pp. 70–71). Road Reston: Hunter Associate Laboratory Inc.Google Scholar
  4. Askari, G. R., Emam-Djomeh, Z., & Mousavi, S. M. (2008). Investigation of the effects of microwave treatment on the optical properties of apple slices during drying. Drying Technology, 26, 1362–1368.CrossRefGoogle Scholar
  5. Bchir, B., Besbes, S., Karoui, R., Attia, H., Pagout, M., & Blecker, C. (2010). Effect of air-drying conditions on physico-chemical properties of osmotically pre-treated pomegranate seeds. Food and Bioprocess Technology. doi: 10.1007/s11947-010-0469-3.Google Scholar
  6. Bridle, P., & Timberlake, C. F. (1997). Anthocyanins as natural food colours—selected aspects. Food Chemistry, 58(1–2), 103–109.CrossRefGoogle Scholar
  7. Cam, M., Hisil, Y., & Durmaz, G. (2009). Classification of eight pomegranate juices based on antioxidant capacity measured by four methods. Food Chemistry, 112, 721–726.CrossRefGoogle Scholar
  8. Cemeroglu, B., Velioglu, S., & Isik, S. (1994). Degradation kinetics of anthocyanins in sour cherry juice and concentrate. Journal of Food Science, 59, 1216–1218.CrossRefGoogle Scholar
  9. Culpepper, C. W., & Caldwell, J. S. (1927). The behavior of the anthocyanin pigments in canning. Journal of Agricultural Research, 35(2), 107–132.Google Scholar
  10. Erle, U. (2005). Drying using microwave processing. In H. Schubert & M. Regier (Eds.), Microwave processing of food (pp. 142–151). Cambridge: Woodhead Publications.CrossRefGoogle Scholar
  11. Hertog, M. G. L., Sweetnam, P. M., Fehily, A. M., Elwood, P. C., & Kromhout, D. (1997). Antioxidant flavonols and ischaemic heart disease in a welsh population of men. The caerphilly study. The American Journal of Clinical Nutrition, 65, 1489–1494.Google Scholar
  12. Kirka, A., Ozkan, M., & Cemeroglu, B. (2007). Effects of temperature, solid content and pH on the stability of black carrot anthocyanins. Food Chemistry, 101, 212–218.CrossRefGoogle Scholar
  13. krokida, M. K., & Maroulis, Z. B. (1999). Effect of microwave drying on some quality properties of dehydrated products. Drying Technology, 17(3), 449–466.CrossRefGoogle Scholar
  14. Lako, J., Trenerry, V. C., Wahlqvist, M., Wattanapenpaiboon, N., Sotheeswaran, S., & Premier, R. (2007). Phytochemical flavonols, carotenoids and the antioxidant properties of a wide selection of Fijian fruit, vegetables and other readily available foods. Food Chemistry, 101, 1727–1741.CrossRefGoogle Scholar
  15. Markakis, P. (1982). Anthocyanins as food additives. In P. Markakis (Ed.), Anthocyanins as food colors (pp. 245–253). New York: Academic.Google Scholar
  16. Maskan, M. (2006). Production of pomegranate (Punica granatum L.) juice concentrate by various heating methods: colour degradation and kinetics. Journal of Food Engineering, 72, 218–224.CrossRefGoogle Scholar
  17. Mousavinejad, G., Emam-Djomeh, Z., Rezaei, K., & Haddad Khodaparast, M. H. (2009). Identification and quantification of phenolic compounds and their effects on antioxidant activity in pomegranate juices of eight Iranian cultivars. Food Chemistry, 115, 1274–1278.CrossRefGoogle Scholar
  18. Mujumdar, A. S. (2000). Drying technology in agricultural and food science (pp. 61–98). Plymouth: Science Publishers, Inc. pp. 253–286.Google Scholar
  19. Perez-Vicente, A., Serreno, P., Abellan, P., & Garcia-Viguera, C. (2004). Influence of packaging material on pomegranate juice colour and bioactive compounds, during storage. Journal of the Science of Food and Agriculture, 84, 639–644.CrossRefGoogle Scholar
  20. Scalzo, R., Genna, A., Branca, F., Chedin, M., & Chassaigne, H. (2008). Anthocyanin composition of cauliflower (Brassica oleracea L. var. botrytis) and cabbage (B. oleracea L. var. capitata) and its stability in relation to thermal treatments. Food Chemistry, 107, 136–144.CrossRefGoogle Scholar
  21. Suh, H. J., Noh, D. O., Kang, C. S., Kim, J. M., & Lee, S. W. (2003). Thermal kinetics of color degradation of mulberry fruit extract. Die Nahrung, 47, 132–135.CrossRefGoogle Scholar
  22. Sumner, M. D., Elliot-Eller, M., Weidner, G., Daubenmier, J. J., Chew, M. H., Marlin, R., et al. (2005). Effects of pomegranate juice consumption on myocardial perfusion in patients with coronary heart disease. The American Journal of Cardiology, 96, 810–814.CrossRefGoogle Scholar
  23. Torregiani, D., Forni, E., Guercilena, I., Maestrelli, A., Bertolo, G., Archer, G. P., et al. (1999). Modification of glass transition temperature through carbohydrates additions: effect upon colour and anthocyanin pigment stability in frozen strawberry juices. Food Research International, 32, 441–446.CrossRefGoogle Scholar
  24. Vadivambal, R., & Jayas, D. S. (2010). Non-uniform temperature distribution during microwave heating of food materialsa review. Food and Bioprocess Technology, 3, 161–171.CrossRefGoogle Scholar
  25. Wang, W. D., & Xu, S. H. Y. (2007). Degradation kinetics of anthocyanins in blackberry juice and concentrate. Journal of Food Engineering, 82, 271–275.CrossRefGoogle Scholar
  26. Yang, Z., Zhenxin Gu, Y., Fan, G., & Chen, Z. (2008). Thermal degradation kinetics of aqueous anthocyanins and visual color of purple corn (Zea mays L.) cob. Innovative Food Science & Emerging Technologies, 9, 341–347.CrossRefGoogle Scholar

Copyright information

© Springer Science + Business Media, LLC 2011

Authors and Affiliations

  • Shima Yousefi
    • 1
  • Zahra Emam-Djomeh
    • 1
  • Sayed Mohammad Ali Mousavi
    • 1
  • Gholam Reza Askari
    • 1
  1. 1.Transfer Properties Lab (TPL), Department of Food Science and Technology, Faculty of Agricultural Engineering and TechnologyUniversity of TehranKaradjIran

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