Fruit and vegetable dehydration has been extensively studied for the improvement of food preservation. Effects of drying temperature on the drying kinetics of thyme were investigated and a suitable drying model was obtained to describe the drying process. Drying behaviour of thyme leaves at temperatures of 50, 60, 70 and 80°C was determined by using a conventional drying oven, and moisture ratio and drying rates were calculated. Four different thin layer drying models, namely Lewis, Henderson and Pabis, Page, and logarithmic models, were used to fit the experimental moisture ratio data. Three statistical parameters: coefficient of determination (R2), chi-square (χ2) and root mean square error (RMSE) were used to compare the goodness of fit of the drying models. Logarithmic model and Page model give the best description of the drying process kinetics of thyme leaves by comparing the experimental values and predicted values.
Akgun Nalan A., Doymaz Ibrahim (2005): Modelling of olive cake thin-layer drying process. Journal of Food Engineering, 68, 455-461 https://doi.org/10.1016/j.jfoodeng.2004.06.023
Akpinar Ebru Kavak, Bicer Yasar, Yildiz Cengiz (2003): Thin layer drying of red pepper. Journal of Food Engineering, 59, 99-104 https://doi.org/10.1016/S0260-8774(02)00425-9
Botrel Diego Alvarenga, Rodrigues Istefane Cristina Borges, Souza Hugo Junior Barboza de, Fernandes Regiane Victória de Barros (2016): Application of inulin in thin-layer drying process of araticum (Annona crassiflora) pulp. LWT - Food Science and Technology, 69, 32-39 https://doi.org/10.1016/j.lwt.2016.01.018
Chen Qinqin, Bi Jinfeng, Wu Xinye, Yi Jianyong, Zhou Linyan, Zhou Yuhan (2015): Drying kinetics and quality attributes of jujube (Zizyphus jujuba Miller) slices dried by hot-air and short- and medium-wave infrared radiation. LWT - Food Science and Technology, 64, 759-766 https://doi.org/10.1016/j.lwt.2015.06.071
Doymaz İbrahim (2006): Thin-layer drying behaviour of mint leaves. Journal of Food Engineering, 74, 370-375 https://doi.org/10.1016/j.jfoodeng.2005.03.009
Doymaz İbrahim (2007): The kinetics of forced convective air-drying of pumpkin slices. Journal of Food Engineering, 79, 243-248 https://doi.org/10.1016/j.jfoodeng.2006.01.049
Doymaz İbrahim (2010): Evaluation of Mathematical Models for Prediction of Thin-Layer Drying of Banana Slices. International Journal of Food Properties, 13, 486-497 https://doi.org/10.1080/10942910802650424
Erbay Zafer, Icier Filiz (2010): A Review of Thin Layer Drying of Foods: Theory, Modeling, and Experimental Results. Critical Reviews in Food Science and Nutrition, 50, 441-464 https://doi.org/10.1080/10408390802437063
Evin Duygu (2012): Thin layer drying kinetics of Gundelia tournefortii L.. Food and Bioproducts Processing, 90, 323-332 https://doi.org/10.1016/j.fbp.2011.07.002
Guiné Raquel P.F., Pinho Susana, Barroca Maria João (2011): Study of the convective drying of pumpkin (Cucurbita maxima). Food and Bioproducts Processing, 89, 422-428 https://doi.org/10.1016/j.fbp.2010.09.001
Hashim Norhashila, Daniel Onwude, Rahaman Ezdalina (2014): A Preliminary Study: Kinetic Model of Drying Process of Pumpkins (Cucurbita Moschata) in a Convective Hot Air Dryer. Agriculture and Agricultural Science Procedia, 2, 345-352 https://doi.org/10.1016/j.aaspro.2014.11.048
Henderson S.M., Pabis S. (1961): Grain drying theory I: Temperature effect on drying coefficient. Journal of Agricultural Engineering Research, 6: 169–174.
Jin Park Kil, Vohnikova Zdenka, Pedro Reis Brod Fernando (2002): Evaluation of drying parameters and desorption isotherms of garden mint leaves (Mentha crispa L.). Journal of Food Engineering, 51, 193-199 https://doi.org/10.1016/S0260-8774(01)00055-3
Kadam D.M., Goyal R.K., Gupta M.K. (2011): Mathematical modeling of convective thin layer drying of basil leaves. Journal of Medicinal Plants Research, 5: 4721–4730.
Kumar Navneet, Sarkar B. C., Sharma H. K. (2012): Mathematical modelling of thin layer hot air drying of carrot pomace. Journal of Food Science and Technology, 49, 33-41 https://doi.org/10.1007/s13197-011-0266-7
Lahnine Lamyae, Idlimam Ali, Mahrouz Mostafa, Jada Amane, Hanine Hafida, Mouhib Mohamed, Zantar Said, Kouhila Mohamed (2016): Adsorption measurements and modeling of thyme treated with gamma irradiation and thermal–biochemical treatment. Industrial Crops and Products, 88, 36-43 https://doi.org/10.1016/j.indcrop.2016.02.049
Lewis W.K. (1921): The rate of drying of solid materials. Journal of Industrial & Engineering Chemistry, 13: 427–432.
Mandal S., DebMandal M. (2016): Thyme (Thymus vulgaris L.) oils. In: Preedy V.R. (ed): Essential Oils in Food Preservation, Flavor and Safety. USA, Academic Press: 825–834.
Muliterno Marina Martins, Rodrigues Daniele, de Lima Fernando Sanches, Ida Elza Iouko, Kurozawa Louise Emy (2017): Conversion/degradation of isoflavones and color alterations during the drying of okara. LWT, 75, 512-519 https://doi.org/10.1016/j.lwt.2016.09.031
Onwude Daniel I., Hashim Norhashila, Janius Rimfiel B., Nawi Nazmi Mat, Abdan Khalina (2016): Modeling the Thin-Layer Drying of Fruits and Vegetables: A Review. Comprehensive Reviews in Food Science and Food Safety, 15, 599-618 https://doi.org/10.1111/1541-4337.12196
Onwude D.I., Hashim N., Chen G. (2016): Recent advances of novel thermal combined hot air drying of agricultural crops. Trends in Food Science & Technology, 57: 132–145.
Özdemir Murat, Onur Devres Y (1999): The thin layer drying characteristics of hazelnuts during roasting. Journal of Food Engineering, 42, 225-233 https://doi.org/10.1016/S0260-8774(99)00126-0
Page G.E. (1949): Factors influencing the maximum rates of air drying shelled corn in thin layers. [Diploma Thesis]. Lafayette, Purdue University.
Pardeshi I. L., Arora S., Borker P. A. (2009): Thin-Layer Drying of Green Peas and Selection of a Suitable Thin-Layer Drying Model. Drying Technology, 27, 288-295 https://doi.org/10.1080/07373930802606451
PEREZ NELSON E., SCHMALKO MIGUEL E. (2009): CONVECTIVE DRYING OF PUMPKIN: INFLUENCE OF PRETREATMENT AND DRYING TEMPERATURE. Journal of Food Process Engineering, 32, 88-103 https://doi.org/10.1111/j.1745-4530.2007.00200.x
Saxena J., Dash K.K. (2015): Drying kinetics and moisture diffusivity study of ripe jackfruit. International Food Research Journal, 22: 414–420.
Yagcioglu A., Degirmencioglu A., Cagatay F. (1999): Drying characteristics of laurel leaves under different conditions. In: Proceedings of the 7th International Congress on Agricultural Mechanization and Energy, Adana, Turkey: 565–569.
Zielinska Magdalena, Michalska Anna (2016): Microwave-assisted drying of blueberry (Vaccinium corymbosum L.) fruits: Drying kinetics, polyphenols, anthocyanins, antioxidant capacity, colour and texture. Food Chemistry, 212, 671-680 https://doi.org/10.1016/j.foodchem.2016.06.003