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Color Change Kinetics of Tea Leaves During Microwave Drying

  • Elçin Demirhan ORCID logo and Belma Özbek EMAIL logo
Published/Copyright: April 1, 2015

Abstract

In the present study, the effect of microwave power and sample amount on color change kinetics of tea leaves was investigated during microwave drying. Hunter L, a and b system was used for the color change of the materials; and the total color change (ΔE), chroma, hue angle and browning index (BI) were calculated by using these values. The color of the tea leaves was shifted towards the darker region after the microwave drying process. The mathematical modeling study of color change kinetic showed that a, b, chroma and BI fitted to a first-order kinetic model, while L, total color change (ΔE) and hue angle followed a zero-order kinetic model. For calculation of the activation energy for color change kinetic parameters, the exponential expression based on Arrhenius equation was used.

References

1. ChongKL, LimYY. Effects of drying on the antioxidant properties of herbal tea from selected vitex species. J Food Qual2006;35:519.10.1111/j.1745-4557.2011.00422.xSearch in Google Scholar

2. SharmaGP, PrasadS. Optimization of process parameters for microwave drying of garlic cloves. J Food Eng2005;75:4416.10.1016/j.jfoodeng.2005.04.029Search in Google Scholar

3. Va`zquezG, ChenloF, MoreiraR, CastoyasA. The dehydration of garlic. I. Desorption isotherms and modeling of drying kinetics. Drying Technol1999;17:1095108.10.1080/07373939908917596Search in Google Scholar

4. KrokidaMK, MaroulisZB, SaravacosGD. The effect of the method of drying on the colour of dehydrated products. Int J Food Sci Technol2001;36:539.10.1046/j.1365-2621.2001.00426.xSearch in Google Scholar

5. KrokidaMK, TsamiE, MaroulisZB. Kinetics on color changes during drying of some fruits and vegetables. Drying Technol1998;16:66785.10.1080/07373939808917429Search in Google Scholar

6. AvilaIMLB, SilvaCLM. Modelling kinetics of thermal degradation of colour of peach puree. J Food Eng1999;39:1616.10.1016/S0260-8774(98)00157-5Search in Google Scholar

7. GoulaAM, AdamopoulosKG, ChatzitakisPC, NikasVA. Prediction of lycopene degradation during a drying process of tomato pulp. J Food Eng2006;74:3746.10.1016/j.jfoodeng.2005.02.023Search in Google Scholar

8. KumarPS, SagarVR, SinghU. Effect of tray load on drying kinetics of mango, guava and aonla. J Sci Ind Res2006;65:65964.Search in Google Scholar

9. KaftanA. Kinetics of color degradation in thermal processed almond. 2012 International Conference on Environment, Energy, and Biotechnology, Vol. 33. IACSIT Press, Singapore, 2012:2659.Search in Google Scholar

10. TijskensLMM, SchijvensEPHM, BiekmanESA. Modelling the change in colour of broccoli and green beans during blanching. Innovative Food Sci Emerg Technol2001;2:30313.10.1016/S1466-8564(01)00045-5Search in Google Scholar

11. GarzaS, IbarzA, PaganJ, GinerJ. Non-enzymatic browning in peach puree during heating. Food Res Int1999;32:33543.10.1016/S0963-9969(99)00094-0Search in Google Scholar

12. MaskanA, KayaS, MaskanM. Effect of concentration and drying processes on colour change of grape juice and leather (pestil). J Food Eng2002;54:7580.10.1016/S0260-8774(01)00187-XSearch in Google Scholar

13. GnanasekharanV, ShewfeltRL, ChinnanMS. Detection of colour changes in green vegetables. J Food Sci1992;57:14954.10.1111/j.1365-2621.1992.tb05444.xSearch in Google Scholar

14. TianMS, DaviesL, DownsCG, LiuXF, LillRE. Effects of floret maturity, cytokinin and ethylene on broccoli yellowing after harvest. Postharvest Biol Technol1995;6:2940.10.1016/0925-5214(94)00047-VSearch in Google Scholar

15. TianMS, WoolfAB, BowenJH, FergusonIB. Changes in colour and chlorophyll fluorescence of broccoli florets following hot water treatment. J Am Soc Hortic Sci1996;121:31013.10.21273/JASHS.121.2.310Search in Google Scholar

16. LijuanZ, JianguoL, YongkangP, GuohuaC, MujumdarAS. Thermal dehydration methods for fruits and vegetables. Drying Technol2005;23:224960.10.1080/07373930500212768Search in Google Scholar

17. LozanoJE, IbarzA. Colour changes in concentrated fruit pulp during heating at high temperatures. J Food Eng1997;31:36573.10.1016/S0260-8774(96)00079-9Search in Google Scholar

18. Gamlı ÖF. Kinetic study of color changes of tomato purees with microwave and conventional drying. J Food Sci Eng2011;1:36673.Search in Google Scholar

19. KoyuncuT, TosunI, UstunNS, KineticsD. Colour retention of dehydrated rosehips. Drying Technol2003;21:136981.10.1081/DRT-120023184Search in Google Scholar

20. ChenCR, RamaswamyHS. Colour and texture change kinetics in ripening bananas. Lebensm Wiss Technol2002;35:41519.10.1006/fstl.2001.0875Search in Google Scholar

21. MaskanM. Microwave/air and microwave finish drying of banana. J Food Eng2000;44:718.10.1016/S0260-8774(99)00167-3Search in Google Scholar

22. BalLM, KarA, SatyaS, NaikSN. Kinetics of colour change of bamboo shoot slices during microwave drying. Int J Food Sci Technol2011;46:82733.10.1111/j.1365-2621.2011.02553.xSearch in Google Scholar

23. DadalıG, AparDK, ÖzbekB. Colour change kinetics of okra undergoing microwave. Drying Technol2007;25:92536.10.1080/07373930701372296Search in Google Scholar

24. DadalıG, DemirhanE, ÖzbekB. Microwave heat treatment of spinach: drying kinetic and effective moisture diffusivity. Drying Technol2007;25:171323.10.1080/07373930701590954Search in Google Scholar

25. DemirhanE, ÖzbekB. Color change kinetics of microwave dried basil. Drying Technol2009;27:15666.10.1080/07373930802566101Search in Google Scholar

26. DemirhanE, ÖzbekB. Color change kinetics of celery leaves undergoing microwave heating. Chem Eng Commun2011;198:1189205.10.1080/00986445.2010.525106Search in Google Scholar

27. MaskanM. Kinetics of colour change of kiwifruits during hot air and microwave drying. J Food Eng2000;48:16975.10.1016/S0260-8774(00)00154-0Search in Google Scholar

28. AhmedJ, KaurA, ShivhareU. Colour degradation kinetics of spinach, mustard leaves and mixed puree. J Food Sci2002;67:108891.10.1111/j.1365-2621.2002.tb09457.xSearch in Google Scholar

29. PrachayawarakomS, PrachayawasinP, SoponronnaritS. Effective diffusivity and kinetics of urease inactivation and colour change during processing of soybeans with super-heated-steam fluidized bed. Drying Technol2004;22:2095118.10.1081/DRT-200034265Search in Google Scholar

30. TeixeiraAA, DixonJR, ZahradnikJW, ZinsmeisterGE. Computer optimisation of nutrient retention in the thermal processing of conduction-heated foods. Food Technol1969;23:13742.Search in Google Scholar

31. LeeHS, CoatesGA. Thermal pasteurization effects on colour of red grapefruit juices. J Food Sci1999;64:6636.10.1111/j.1365-2621.1999.tb15106.xSearch in Google Scholar

32. PalouE, Lopez-MaloA, Barbosa-CanovasGV, Welti-ChanesJ, SwansonBG. Polyphenoloxidase activity and colour of blanched and high hydrostatic pressure treated banana puree. J Food Sci1999;64:425.10.1111/j.1365-2621.1999.tb09857.xSearch in Google Scholar

33. WeemaesC, OomsV, IndrawatiL, LudikhuyzeI, BroeckV, LoeyA, et al. Pressure-temperature degradation of green colour in broccoli juice. J Food Sci1999;64:5048.10.1111/j.1365-2621.1999.tb15072.xSearch in Google Scholar

34. RhimJW, NunesRV, JonesVA, SwartzelKR. Kinetics of colour change of grape juice generated using linearly increasing temperature. J Food Sci1989;54:7767.10.1111/j.1365-2621.1989.tb04710.xSearch in Google Scholar

35. LopezA, PiqueMT, BoatellaJ, RomeroA, FerranA, GarciaJ. Influence of drying conditions on the hazelnut quality: III. Browning. Drying Technol1997;15:9891002.10.1080/07373939708917273Search in Google Scholar

Published Online: 2015-4-1
Published in Print: 2015-4-1

©2015 by De Gruyter

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