Abstract
The purpose of this study is to correlate water content and oil uptake with the structural changes of potato particulates during deep-fat frying. Raw potato particulates were sliced to form cylinders of 0.006 m diameter × 0.006 m length and subjected to deep-fat frying at isothermal oil temperatures of 160, 190 and 220 °C. The microstructure properties were assessed using a field emission scanning electron microscope (FESEM). Previous results showed that a simultaneous two first-order kinetic model adequately predicted water loss of potato particulates during isothermal frying. In this study, a simple rational model with two parameters in which regression squared (Rsqr) reaches 0.983 shows that oil uptake can be expressed by water content. The cross-sectional structure of potato particulates observed using FESEM is different from the surface structure. Regardless of the frying temperature, pores not only become larger but also increase in number after the transition time. The observations of structural changes at the surface and inner section of potato particulates through the pictures of FESEM are critical. This physical evidence supports our previous assumption that the mechanisms of water loss (two-stage rate processes) before and after transition time are different.
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References
Costa RM, Oliveira FAR (1999) Modelling the kinetics of water loss during potato frying with a compartmental dynamic model. J Food Eng 41:177–185
Debnath S, Bhat KK, Rastogi NK (2003) Effect of pre-drying on kinetics of moisture loss and oil uptake during deep fat frying of chickpea flour-based snack food. Lebensm Wiss Technol 36:91–98
Bouchon P, Aguilera JM, Pyle DL (2003) Structure oil-absorption relationships during deep-fat frying. J Food Sci 68:2711–2716
Ufheil G, Escher F (1996) Dynamics of oil uptake during deep-fat frying of potato slices. Lebensm Wiss Technol 29:640–644
Moreno MC, Bouchon P (2008) A different perspective to study the effect of freeze, air, and osmotic drying on oil absorption during potato frying. J Food Sci 73:122–128
Ziaiifar AM, Achir N, Courtois F, Trezzani I, Trystram G (2008) Review of mechanisms, conditions, and factors involved in the oil uptake phenomenon during the deep-fat frying process. Int J Food Sci Technol 43:1410–1423
Pedreschi F, Cocio C, Moyano P, Troncoso E (2008) Oil distribution in potato slices during frying. J Food Eng 87:200–212
Krokida MK, Oreopoulou V, Maroulis ZB (2000) Water loss and oil uptake as a function of frying time. J Food Eng 44:39–46
Bouchon P, Aguilera JM, Pyle DL (2001) Microstructure analysis of frying potatoes. Int J Food Sci Technol 36:669–676
Moreira RG, Sun X, Chen Y (1997) Factors affecting oil uptake in tortilla chips in deep-fat frying. J Food Eng 31:485–489
Lisinska G, Golubowska G (2005) Structural changes of potato tissue during French fries production. Food Chem 93:681–687
Blumenthal MM (1991) A new look at the chemistry and physics of deep-fat frying. Food Technol 45(68–71):94
Huang PY, Fu YC (2009) The study of water loss and oil uptake during deep-fat frying of potato cylinders. In: The 4th Food and Biotechnology Symposium among Mainland, Taiwan and Hong Kong. Technical session V: modern technology of food determination and analysis, Beijing
Costa RM, Oliveira FAR, Boutcheva G (2001) Structure changes and shrinkage of potato during frying. Int J Food Sci Technol 36:11–23
Gamble MH, Rice P (1987) Effect of pre-fry drying of oil uptake and distribution in potato crisp manufacture. Int J Food Sci Technol 22:535–548
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Huang, PY., Fu, YC. Relationship Between Oil Uptake and Water Content During Deep-Fat Frying of Potato Particulates Under Isothermal Temperature. J Am Oil Chem Soc 91, 1179–1187 (2014). https://doi.org/10.1007/s11746-014-2472-8
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DOI: https://doi.org/10.1007/s11746-014-2472-8