Freeze-Drying of Persimmon (Diospyros Kaki) Slices Investigation of Drying Characteristics

Öz

This study was performed to define the kinetic drying model and to define the effective diffusivity coefficient of the fruit, which is called Diospyros kaki in the literature, from the family of Ebonaceae known as the Persimmon in our country. In the study, blueberries by the weight of 100 g and with a thickness of 5 mm were placed in the drying device, and the data were processed by observing the weight loss every two hours after being subjected to the drying process for 14 hours. 8 different kinetic drying models were applied to the acquired data using the Matlab program. As a result of the application, the estimated standard errors (RMSE), chi-square (X2), regression coefficients (R2) were calculated, error analysis was performed, R2, X2, and RMSE values were found, as 0.019483, 5.062 x 10-4 and 0.9558. According to these results, it was determined that the most suitable model is the Page model. Also, the effective diffusivity coefficients for Persimmon (Diospyros Kaki) were calculated as 1.79775 × 10-10 m2/s.

Anahtar Kelimeler

• Drying kinetics
• drying of Persimmon (Diospyros Kaki)
• kinetic drying model
• page model
• effective diffusivity.

Dondurarak Kurutulan Trabzon Hurması (Diospyros Kaki) Dilimlerinin Kurutma Özelliklerinin İncelenmesi

Öz

Bu çalışma ülkemizde Cennet Hurması olarak bilinen Abanozgiller ailesinden literatürdeki adı Diospyros kaki olan meyvenin dondurarak kurutulması, kinetik kurutma modelinin belirlenmesi ve efektif difüzivite katsayısı belirlenmesi amacıyla yapılmıştır. Çalışmada 100 gr ve 5 mm et kalınlığına sahip yaban mersinleri kurutma cihazının içerisine yerleştirilmiş, 14 saat kurutma işlemine tabi tutularak her iki saatte bir ağırlık kayıpları gözlemlenerek veriler işlenmiştir. Elde edilen verilere Matlab programı kullanılarak 8 farklı kinetik kurutma modeli uygulanmıştır. Uygulama sonucunda tahmini standart hatalar olan (RMSE), ki-kare (X2), regresyon katsayıları (R2) hesaplanmış, hata analizleri yapılmış ve R2, X2, RMSE değerleri sırasıyla, 0,019483, 5,062 x 10-4 ve 0,9558 olarak bulunmuştur. Bu sonuçlara göre en uygun modelin Page modeli olduğu belirlenmiştir. Ayrıca yaban mersini için efektif difüzivite katsayılarının 1,79775× 10-10 m2/s olarak hesaplanmıştır.

Anahtar Kelimeler

• Kurutma kinetiği
• Trabzon hurmasının kurutulması
• kinetik kurutma modeli
• page model
• efektif difüzivite

Destekleyen Kurum

Karabük Üniversitesi

Kaynakça

1. [1] Guan, C., Che, Q., Zhang, P., Chachar S., and Ruan X., “Codification and description of growth stages in persimmon (Diospyros kaki Thunb.) using the extended BBCH scale”, Scientia Horticultural, 280 (5), 109895 (2021).
2. [2] Ulusan, H. D., “Development of a novel baby food from persimmon puree and hazelnut flour by ultrasonication and eau de rose addition and the investigation of its certain chemical, physical and microbiological properties”, Abant İzzet Baysal University / Graduate School of Natural and Applied Sciences / Department of Biology, 4 November 2016.
3. [3] Uçar H., “In Different Harvest Period Investigation Of Quality Properties Of Persimmon (DIOSPYROS KAKI)”, Ege University / Institute of Science / Horticulture Department, September 2010.
4. [4] Günhan S., “Trabzon hurması (Diospyros kaki) bazı fiziksel ve kimyasal özellikleri ile marmelat şeklinde değerlendirilmesi üzerine araştırmalar”, Uludag University / Institute of Science and Technology / Department of Food Engineering, 28 October 1998.
5. [5] Akyıldız E. Y., “Investigation of some physicochemical and microbiological quality parameters of persimmon (Diospyros kaki) and kiwi (Actinidia deliciosa) dried in different conditions”, Afyon Kocatepe University / Institute of Science and Technology / Department of Food Engineering, 15 January 2021.
6. [6] Kaya Y., “Research on flower biologies in some persimmon varieties”, Çanakkale Onsekiz Mart University / Graduate School of Education / Department of Horticulture, 24 August 2020.
7. [7] Dehghannya, J., Farshad, P., Heshmati, M. K., “Three-stage Hybrid Osmotic–intermittent Microwave–convective Drying of Apple at Low Temperature and Short Time”, Drying Technology, (36), 1982-2005, 2018.
8. [8] Carrion, M. H., Varela, P., Hernando, I., Fiszman, S. M., and Quiles, A., “Persimmon milkshakes with enhanced functionality: Understanding consumers' perception of the concept and sensory experience of a functional food”, LWT- Food Science and Technology, 62(1), 384-392, 2015.

9. [9] Zhao, C. C., Ameer, K., and Bangeun J., “Effects of various drying conditions and methods on drying kinetics and retention of bioactive compounds in sliced persimmon”, LWT- Food Science and Technology, 143, 111-149, 2021.
10. [10] Li, Y., Liu, J., Liu Y., Yan, Dan., Wu, H., Li, R., Jiang Z., Yang, Y., and Ren, X., “Polyphenol oxidase plays a critical role in melanin formation in the fruit skin of persimmon (Diospyros kaki cv. ‘Heishi’), Food Chemical, 330, 127253, 2020.
11. [11] Kırmacı, V., Usta, H., and Menlik, T., “An Experimental Study on Freeze-drying Behavior of Strawberries”, Drying Technology, 26, 1570-1576, 2008.
12. [12] Las Heras, R. M., Castello, M. L., and Andres, A., “Influence of drying method and extraction variables on the antioxidant properties of persimmon leaves”, Food Bioscience, 6, 1-8, 2014.
13. [13] Chang, Y. L., Lin, J. T., Lin, H., Linliao, P., Wu, P., and Yang, “Phenolic compositions and antioxidant properties of leaves of eight persimmon varieties harvested in different periods” Food Chemical, 289, 74-83, 2019.
14. [14] Iturralde, A. C., Pena, M. J., Zarra, I., and Lorences, E. P., “A xyloglucan from persimmon fruit cell walls”, Chemistry, 48(4), 607-610, 1998.
15. [15] Moraga, G., Talens, P., Morage, M. J., and Martinez, N., “Implication of Water Activity and Glass Transition on The Mechanical and Optical Properties of Freeze-dried Apple and Banana Slices”, Journal of Food Engineering, 106, 212-219, 2011.
16. [16] Sadıkoglu H., Liapis, A. I., and Crosser O. K., ““Optimal control of the primary and secondary drying stages of bulk solution freeze drying in trays,” Drying Technology, 16, 399-431, 2007.
17. [17] Menges, H. O., and Ertekin, C., “Mathematical modeling of thin layer drying of Golden apples”, Journal Food Engineering, 77(1), 119-125, 2006.
18. [18] Vega‐Gálvez, A., Miranda, M., Bilbao‐Sáinz, C., Uribe, E., and Lemus‐Mondaca, R., “Empirical modeling of drying process for apple (Cv. Granny Smith) slices at different air temperatures”, ", Journal Of Food Processing And Preservation, 32(6): 972-986, 2008.
19. [19] Acar B., Sadıkoglu H., and Doymaz, I., “Freeze-Drying Kinetics And Diffusion Modeling Of Saffron (Crocus Satıvus L.)”, Drying Technology, 39, 142-149, 2015.
20. [20] Crank J., “The Mathematics of Diffusion; Oxford University Press”, Great Britain, 1975.
21. [21] Acar B., Dağdeviren, A., and Özkaymak, M., "Design of Hazelnut Drying System Supported By Solar Energy, Investigation of Drying Performance and Determination of Proper Drying Model", International Journal of Renewable Energy Research, 10: 570-577 (2020).
22. [22] Dağdeviren, A., Acar B., and Aydın, M., "Alternative heat Insulation Method for Rigid Construction Wall", International Journal of Energy Studies, 6(1): 19-35 (2021).
23. [23] Acar B., Dağdeviren, A., Janaani A., Roshanaeı K., Taskesen E., Ongun G. K., and Ozkaymak, M., "Freeze-Drying of Carrot Slices in Diverse Thicknesses", International Journal of Energy Studies, 6(1): 53-65 (2021).