Abstract
Moisture sorption isotherms of figs with and without glucose syrup (at 20% and 40%, w/w) were determined at 5 °C, 25 °C, and 40 °C. A static gravimetric method was used under 0.11–0.84 water activity ranges for the determination of sorption isotherms that were found to be typical type ΙΙΙ for control sample. The inclusion of glucose syrup had significant effects on the sorption isotherms, and the moisture content of samples at each a w decreased with increasing temperature. The experimental data were fitted well with two-parameter Brunauer–Emmet–Teller, three-parameter Guggenheim–Anderson–de Boer, and four-parameter Peleg models that all had R 2 of greater than 0.99. The net isosteric heats of sorption were estimated using the Clausius–Clapeyron equation from the equilibrium data at different temperatures. It was found that the addition of glucose syrup significantly increased the amount of monolayer water and the isosteric heat of sorption. Both water activity and isosteric heat of sorption increased with glucose syrup level and the shape and status of sorption isotherms tend to change toward the typical sigmoid shape of most food systems.
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References
O.R. Fennema, Food Chemistry, 2nd edn. (Marcel Dekker, New York, 1985)
T.P. Labuza, A theoretical comparison of loss in foods under fluctuating temperature sequences. J. Food Sci. 44, 1162–8 (1979)
I. Saguy, M. Karel, Modelling of quality determination during food processing and storage. Food Technol. 34, 78–85 (1980)
C.J. Lomauro, A.S. Bakshi, T.P. Labuza, Evaluation of food moisture isotherm equations. Part I: fruit, vegetable and meat products. Lebensm. Wiss. Technol. 18, 111–7 (1985)
T.P. Labuza, A. Kaanane, J.Y. Chen, Effect of temperature on the water adsorption isotherms of two dehydrated foods. J. Food Sci. 50, 385–91 (1985)
N.A. Aviara, O.O. Ajibola, U.O. Dairo, Thermodynamics of moisture sorption in sesame seed. Biosyst. Eng. 83, 423–31 (2002)
N.A. Aviara, O.O. Ajibola, S.A. Oni, Sorption equilibrium and thermodynamic characteristics of soya bean. Biosyst. Eng. 87, 179–90 (2004)
M. Kabirullah, R.B.H. Wills, Hydration characteristics of sunflower proteins. Lebensm. Wiss. Technol. 15, 267–9 (1982)
A. Nabill, H. Bouabidi, M. Trifi, M. Marrakchi, Water vapour desorption of Deglet Noor and Ali Dates. in Information and Technology for Sustainable Fruit and Vegetable Production (Montpellier, France, 2005)
Z.B. Maroulis, E. Tsami, D. Marinos-Kouris, G.D. Saravacos, Application of the GAB model to the moisture sorption isotherms of dried fruits. J. Food Eng. 7, 63–78 (1988)
E. Ayranci, G. Ayranci, Z. Dogantan, Moisture sorption isotherms of dried apricot, fig and raisin at 20 °C and 36 °C. J. Food Sci. 55, 1591–3 (1990)
E. Tsami, D. Marinos-Kouris, Z.B. Maroulis, Water sorption isotherms of raisins, currants, figs, prunes and apricots. J. Food Sci. 55, 1594–7 (1990)
G.D. Saravacos, D.A. Tsiourvas, E. Tsami, Effect of temperature on the water adsorption isotherms of sultana raisins. J. Food Sci. 51, 381–3 (1986)
E.O. Timmermann, A BET-like three sorption stage isotherm. J. Chem. Soc. Faraday Trans. 85, 1631–45 (1989)
H. Bizot, Using the GAB model to construct sorption isotherms, in Physical Properties of Foods, ed. by R. Jowitt et al. (Applied Science, New York, 1983), pp. 43–54
C. Van den Berg, S. Bruin, Water activity and its estimation in food systems: theoretical aspects, in Water Activity: Influence on Food Quality, ed. by L.B. Rockland, G.F. Stewart (Academic, New York, 1981), pp. 147–77
M. Peleg, Assessment of a semi-empirical four parameter general model for sigmoid moisture sorption isotherms. J. Food Process Eng 16, 21–37 (1993)
A. Mulet, J. García-Reverter, R. Sanjuán, J. Bon, Sorption isosteric heat determination by thermal analysis and sorption isotherms. J. Food Sci. 64, 64–8 (1999)
M. Duenas, J.J. Pe’rez-Alonso, C. Santos-Buelga, T. Escribano-Bailon, Anthocyanin composition in fig (Ficus carica L.). J. Food Compos. Anal. 21, 107–15 (2008)
US Department of Agriculture, Agricultural Research Service, USDA Nutrient database for standard reference, release 15, Nutrient data laboratory home page (2002), http://www.nal.usda.gov/fnic/foodcomps
FAO, Statistical database (2003), http://www.fao.org
S.W. Pixton, S. Warburton, The relationship between moisture content and equilibrium relative humidity of dried figs. J. Stored Prod. Res. 12, 87–92 (1976)
M.L. Meste, D. Champion, G. Roudaut, G. Blond, D. Simatos, Glass transition and food technology: a critical appraisal. J. Food Sci. 67, 2444–56 (2002)
A.E. Sloan, T.P. Labuza, Prediction of water activity lowering ability of food humectants at high aw. J. Food Sci. 41, 532–5 (1976)
A. Gauthier, B. Guerin, J. Oztlieb, Les sirops, vol. 18 (CDIUP A, France, 1978)
J.N. Coupland, N.B. Shaw, F.J. Monahan, E.D. O’Riordan, M. O’Sullivan, Modeling the effect of glycerol on the moisture sorption behavior of whey protein edible films. J. Food Eng. 43, 25–30 (2000)
R. Chinnaswamy, M.A. Hanna, Expansion, color and shear strength properties of corn starches extrusion-cooked with urea and salts. Starch Starke 40, 186–90 (1998)
D. Moore, A. Sanei, E. Van Hecke, J.M. Bouvier, Effect of ingredients on physical/structural properties of extrudates. J. Food Sci. 55, 1383–7 (1990)
C.W.P. Carvalho, J.R. Mitchell, Effect of sucrose on starch conversion and glass transition on nonexpanded maize and wheat extrudates. Cereal Chem. 78, 342–8 (2001)
A. Farahnaky, S. Ansari, M. Majzoobi, Effect of glycerol on the moisture sorption isotherms of figs. J. Food Eng. 93, 468–73 (2009)
Association of Official Analytical Chemist, Official Methods of Analysis of the Association of Official Analytical Chemist (Association of Official Analytical Chemist, Washington, DC, 1990)
S.S.H. Rizvi, Thermodynamic properties of foods in dehydration, in Engineering Properties of Foods, ed. by A. Rao, S.S.H. Rizvi, A.K. Datta (CRC, Boca Raton, 2005)
E. Karmas, Techniques for measurement of moisture content of foods. Food Technol. 34, 52–62 (1980)
R. Boquet, J. Chirife, H.A. Iglesias, Equations for fitting water sorption isotherms of foods: part 2—evaluation of various two-parameter models. J. Food Technol. 13, 319–27 (1978)
M.M.I. Chowdhury, M.D. Huda, M.A. Hossain, M.S. Hassan, Moisture sorption isotherms for mungbean (Vigna radiata L). J. Food Eng. 74, 462–7 (2006)
K.D. Foster, J.E. Bronlund, A.H.J. Paterson, The prediction of moisture sorption isotherms for dairy powders. Int. Dairy J. 15, 411–8 (2005)
A. Jamali, M. Kouhila, L. Ait Mohamed, A. Idlimam, L. Lamharrar, Moisture adsorption–desorption isotherms of citrus reticulate leaves at three temperatures. J. Food Eng. 77, 71–8 (2006)
A.H. Al-Muhtaseb, W.A.M. McMinn, T.R.A. Magee, Water sorption isotherms of starch powders. Part 1: mathematical description of experimental data. J. Food Eng. 61, 297–307 (2004)
N.A. Aviara, O.O. Ajibola, O.A. Aregbesola, M.A. Adedeji, Moisture sorption isotherms of sorghum malt at 40 and 50 °C. J. Stored Prod. Res. 42, 290–301 (2006)
B. Brett, M. Figueroa, A.J. Sandoval, J.A. Barreiro, A.J. Müller, Moisture sorption characteristics of starchy products: oat flour and rice flour. Food Biophys. 4, 151–7 (2009)
A. Mulet, P. García-Pascual, N. Sanjuán, J. García-Reverter, Equilibrium isotherms and isosteric heats of morel (Morchela esculenta). J. Food Eng. 53, 75–81 (2002)
C.P. McLaughlin, T.R.A. Magee, The determination of sorption isotherms and the isosteric heats of sorption for potatoes. J. Food Eng. 35, 267–80 (1998)
A. Ayranci, O. Duman, Moisture sorption isotherms of cowpea (Vigna unguiculata L. Walp) and its protein isolate at 10, 20 and 30 °C. J. Food Eng. 70, 83–91 (2005)
K.O. Falade, O.C. Aworh, Adsorption isotherms of osmooven dried African star apple (Chrysophyllum albidum) and African mango (Irvingia gabonensis) slices. Eur. Food Res. Technol. 218, 278–83 (2004)
A.M. Goula, T.D. Karapantsios, D.S. Achilias, K.G. Adamopoulos, Water sorption isotherms and glass transition temperature of spray dried tomato pulp. J. Food Eng. 85, 73–83 (2008)
S. Mali, L.S. Sakanaka, F. Yamashita, M.V.E. Grossmann, Water sorption and mechanical properties of cassava starch films and their relation to plasticizing effect. Carbohydr. Polym. 60, 283–9 (2005)
M.B. Gencturk, A.S. Bakshi, Y.C. Hong, T.P. Labuza, Moisture transfer properties of wild rice. J. Food Process Eng 8, 243–61 (1986)
F. Kaymak-Ertekin, A. Gedik, Sorption isotherms and isosteric heat of sorption for grapes, apricots, apples and potatoes. Lebensm. Wiss. Technol. 37, 429–38 (2004)
C.T. Kiranoudis, Z.B. Maroulis, E. Tsami, D. Marinos-Kouris, Equilibrium moisture content and heat of desorption of some vegetables. J. Food Eng. 20, 55–74 (1993)
K.B. Palipane, R.H. Driscoll, Moisture sorption characteristics of in-shell macadamia nuts. J. Food Eng. 18, 63–76 (1992)
G. Moraga, N. Mart_nez-Navarrete, A. Chiralt, Water sorption isotherms and glass transition in strawberries: influence of pretreatment. J. Food Eng. 62, 315–21 (2004)
M. Maskan, F. Gogus, Sorption isotherms and drying characteristics of mulberry (Morus alba). J. Food Eng. 37, 437–49 (1998)
G. Moraga, N. Martinez-Navarrete, A. Chiralt, Water sorption isotherms and phase transitions in kiwifruit. J. Food Eng. 72, 147–56 (2006)
E.O. Timmermann, J. Chirife, H.A. Iglesias, Water sorption isotherms of foods and foodstuffs: BET or GAB parameters. J. Food Eng. 48, 19–31 (2001)
C.S. Ethmane, M. Kane, A. Kouhila, A. Lamharrar, A. Idlimam, A. Mimet, Moisture sorption isotherms and thermodynamic properties of tow mints: Mentha pulegium and Mentha rotundifolia. Rev. Energ. Renouv. 11, 181–95 (2008)
B.H. Hassan, Moisture sorption characteristics of dried date powder. J. King Saud Univ. 14, 105–12 (2000)
A. Idlimam, A. Lamharrar, N. Abdenouri, S. Akkad, C.S. Ethmane Kane, A. Jamali, M. Kouhila, Thermodynamic properties and moisture sorption isotherms of Argania spinosa and Zygophyllum gaetulum. J. Agrono. 7, 1–14 (2008)
A. Lamharrar, A. Idlimam, M. Kouhila, Thermodynamic properties and moisture sorption isotherms of Artemisia herba-alba. Rev. Energ. Renouv. 10(3), 311–20 (2007)
M.S. Rahman, S.S. Sablani, M.H. Al-Ruzeiqi, N. Guizani, Water adsorption isotherms of freeze-dried tuna meat. Trans. ASAE 45(3), 767–72 (2002)
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This research project was financially supported by Centre of Excellence for Fig Research of Shiraz University (Shiraz, Iran).
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Ansari, S., Farahnaky, A., Majzoobi, M. et al. Modeling the Effect of Glucose Syrup on the Moisture Sorption Isotherm of Figs. Food Biophysics 6, 377–389 (2011). https://doi.org/10.1007/s11483-011-9213-4
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DOI: https://doi.org/10.1007/s11483-011-9213-4