Main Article Content
garlic, drying, allicin potential, kinetic
Allicin is an organosulfur compound formed in garlics, and it is slightly yellow in colour and gives unique odour to garlic. Allicin has been known to have an antioxidant and antimicrobial activity, and it can react with thiol groups containing proteins. Allicin potential (AP) in Taskopru garlic slices and its loss were monitored during drying in a cabinet drier at three temperatures (50, 60 and 70 °C). Initial AP of fresh garlic samples was 10.91±0.15 mg/g on the basis of dry matter (dm), and it reduced significantly during drying (P<0.05). APs of garlic samples dried at 50, 60 and 70 °C for up to 480 minutes were 5.35±0.029, 4.32±0.13 and 3.95±0.26 mg/g dm, respectively (P<0.05). Loss of AP values determined during drying followed a second-order reaction. Drying temperature had a significant influence on the loss of AP in garlic slices. Activation energy for AP loss was 25.48 kJ/mol. Q10 value was 4.18 for the drying temperature increase from 50 to 60 °C, and it reduced to 3.07 for the temperature increase from 60 to 70 °C. Therefore, the effect of the first temperature rise on AP loss was bigger than the second temperature rise
Acartürk, F., 2007. Modern pharmaceutical technologies. Fersa Matbaac?l?k, Ankara, Turkey, 142 pp. (in Turkish)
Akoy, E.O.M., 2014. Experimental characterization and modeling of thin-layer drying of mango slices. Sudan International Food Research Journal 21(5): 1911-1917.
Alibas, I., 2012. Development of a new model for the identification of drying curves of hot air-dried artichoke (Cynara cardunculus L. var. Scolymus) slices and comparison with existing models. Journal of Agricultural Faculty of Uludag University 26(1): 49-61.
Arzanlou, M. and Bohlooli, S., 2010. Introducing of green garlic plant as a new source of allicin. Food Chemistry 120: 179-183.
Association of Official Analytical Chemists (AOAC), 1990. Official methods of analysis, No. 934.06. AOAC, Arlington, VA, USA.
Babetto, A.C., Freire, F.B., Barrozo, M.A.S. and Freire, J.T., 2011. Drying of garlic slices: kinetics and nonlinearity measures for selecting the best equilibrium moisture content equation. Journal of Food Engineering 107: 347-352.
Bocchini, P., Andalò, C., Pozzi, R., Galletti, G.C. and Antonelli, A., 2001. Determination of diallyl thiosulfinate (allicin) in garlic (Allium sativum L.) by high-performance liquid chromatography with a post-column photochemical reactor. Analytica Chimica Acta 441: 37-43.
Calín-Sánchez, Á., Figiel, A., Wojdy?o, A., Szarycz, M. and Carbonell-Barrachina, Á.A., 2014. Drying of garlic slices using convective pre-drying and vacuum-microwave finishing drying: kinetics, energy consumption, and quality studies. Food and Bioprocess Technology 7: 398-408.
Canizares, P., Gracia, I., Gomez, L.A., Garcia, A., Martin de Argila, C., Boixeda, D. and Rafael, L., 2004. Thermal degradation of allicin in garlic extracts and its implication on the inhibition of the in-vitrogrowth of Helicobacter pylori. Biotechnology Progress 20: 32-37.
Cemero?lu, B., 2013. Unit operations in food engineering. Bizim Grup Bas?mevi, Ankara, Turkey, 769 pp. (in Turkish)
Cui, Z.W., Xu, S.Y. and Sun, D.W., 2003. Dehydration of garlic slices by combined microwave-vacuum and air drying. Drying Technology 21(7): 1173-1184.
Demiray, E. and Tulek, Y., 2014. Drying characteristics of garlic (Allium sativum L) slices in a convective hot air dryer. Heat and Mass Transfer 50: 779-786.
Doymaz, I., 2005. Drying characteristics and kinetics of okra. Journal of Food Engineering 69: 275-279.
Giri, S.K. and Prasad, S., 2007. Drying kinetics and rehydration characteristics of microwave-vacuum and convective hot-air dried mushrooms. Journal of Food Engineering 78: 512-521.
Horak, F.P. and Kessler, H.G., 1981. Influence of UHT heating and sterilization on lysine in milk. Milk Science International 36(6): 543-547.
li?, D.P., Nikoli?, V.D., Nikoli?, L.B., Stankovi?, M.Z. and Stanojevi?, L.P., 2010. Thermal degradation, antioxidant and antimicrobial activity of the synthesized allicin and allicin incorporated in gel. Hemijska Industrija 64(2): 85-91.
Khanum, F., Anilakumar, K.R. and Viswanathan, K.R., 2004. Anticarcinogenic properties of garlic: a review. Critical Reviews in Food Science and Nutrition 44: 479-488.
Krest, I. and Keusgen, M., 1999. Quality of herbal remedies from Allium sativum: differences between alliinase from garlic powder and fresh garlic. Planta Medica 65: 139-143.
Lanzotti, V., 2006. The analysis of onion and garlic. Journal of Chromatography A 1112: 3-22.
Lawson, L.D., 1998. Garlic: a review of its medicinal effects and indicate active compounds. In: Lawson, L.D. and Bauer, R. (eds.) Phytomedicines of Europe: their chemistry and biological activity. American Chemical Society, Washington, DC, USA, pp. 176-209.
Madamba, P.S, Driscoll, R.H. and Buckle, K.A., 1996. The thin-layer drying characteristics of garlic slices. Journal of Food Engineering 29: 15-97.
Martins, N., Petropoulos, S. and Ferreira, I.C.F.R., 2016. Chemical composition and bioactive compounds of garlic (Allium sativumL.) as affected by pre- and post-harvest conditions: a review. Food Chemistry 211: 41-50.
Mendez-Lagunas, L., Rodriguez-Ramirez, J. and Reyes-Vasques, D., 2017. Changes in physical properties and relations with allicin degradation during convective drying of garlic. Food Measure 11: 1227-1232.
Menges, O.H., Ertekin, C. and Aydin, C., 2005. Determination of a drying model suitable for convection drying of apple slices. Tar?m Makinalar? Bilim Dergisi 13: 229-236.
Midilli, A. and Kucuk, H., 2003. Mathematical modelling of thin layer drying of pistachio by using solar energy. Energy Conversation and Management 44: 1111-1122.
Polatci, H., 2012. The effect of different drying methods on drying time and quality of AVG (aminoethoxyvinylglycine) treated black beauty (Prunus salicina L) plum variety. Tar?m Makinalar? Bilimi Dergisi 8(2): 171-178.
Prati, P., Henrique, C.M, Souza, A.S.D., Silva, V.S.N.D. and Pacheco, M.T.B., 2014. Evaluation of allicin stability in processed garlic of different cultivars. Food Science Technology Campinas 34(3): 623-628.
Rahman, M.S., 2007. Allicin and other functional active components in garlic: health benefits and bioavailability. International Journal of Food Properties 10(2): 245-268.
Rahman, M.S., Al-Shamsi, Q.H., Bengtsson, G.B., Sablani, S.S. and Al-Alawi, A., 2009. Drying kinetics and allicin potential in garlic slices during different methods of drying. Drying Technology 27: 467-477.
Rasouli, M., 2011. Convective drying of garlic (Allium sativum L.). Part I: drying kinetics, mathematical modeling and change in color. Australian Journal of Crop Science 5(13): 1707-1714.
Ratti, C., 2001. Hot air and freeze-drying of high-value foods: a review. Journal of Food Engineering 49(4): 311-319.
Ratti, C., Araya-Farias, M., Mendez-Lagunas, L. and Makhlouf, J., 2007. Drying of garlic (Allium sativum) and its effect on allicin retention. Drying Technology 25: 349-356.
Robertson, G.L. and Sanaiego, C.M.L., 1986. Effect of initial dissolved oxygen levels on the degradation of ascorbic acid and the browning of lemon juice during storage. Journal of Food Science 51: 184-187.
Sacilik, K. and Unal, G., 2005. Dehydration characteristics of Kastamonu garlic slices. Biosystems Engineering 92(2): 207-215.
Santhosha, S.G., Jamuna, P. and Prabhavathi, S.N., 2013. Bioactive components of garlic and their physiological role in health maintenance: a review. Food Bioscience 3: 59-74.
Saxton, A.M., 2000. PDGLM800 macro for the SAS System (version 8 or higher). University of Tennessee, Knoxville, TN, USA.
Sharma, G.P. and Prasad, S., 2001. Drying of garlic (Allium sativum) cloves by microwave-hot air combination. Journal of Food Engineering 50: 99-105.
Togrul, I.T. and Pehlivan, D., 2004. Modelling of thin layer drying kinetics of some fruits under open-air sun drying process. Journal of Food Engineering 65: 413-425.
Yogurtcu, H., 2014. Lemon drying in microwave oven: kinetics and modelling. Firat University Journal of Engineering 26(1): 27-33. (in Turkish)
Zhou, L., Guo, X., Bi, J., Yi, J., Chen, Q., Wu, X. and Zhou, M., 2017. Drying of garlic slices (Allium sativum L.) and its effect on thiosulfinates, total phenolic compounds, and antioxidant activity during infrared drying. Journal of Food Processing and Preservation 41: e12734.
Zixing, C., Mingjiao, X., Chao, W., Hua, Z., Lokyee, F. and Xuesong, H., 2017. Thermolysis kinetics and thermal degradation compounds of alliin. Food Chemistry 223: 25-30.