:: Volume 15, Issue 1 (Spring 2020) ::
Iranian J Nutr Sci Food Technol 2020, 15(1): 59-70 Back to browse issues page
Oil absorption reduction of eggplant slices during deep fat frying by applying osmotic dehydration pretreatment
A Jokar * , A Parsaii , N Maftoonazad
Agricultural Engineering Research Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Fars, Shiraz, Iran , a.jokar@areeo.ac.ir
Abstract:   (3111 Views)

Background and Objectives: A fairly large amount of oil is absorbed to the food during deep frying. The aim of this study was to reduce the oil absorption of eggplant slices during frying by using osmotic dehydration pretreatment.

Materials and Methods: Using maltodextrin (0, 20, 40% w/v) and sodium chloride (salt, 0, 10, 20% w/v), the effect of osmotic dehydration on different properties of eggplant slices (2 × 2 × 2 cm) was investigated. Osmotic dehydration was carried out in a factorial arrangement with two factors: maltodextrin and salt concentrations at constant time (90 min) and temperature (30 °C). The effect of osmotic dehydration on the moisture loss, solid gain, osmotic performance ratio (PR) and shrinkage of the samples after osmotic process, as well as the oil absorption, texture, color, and sensory properties of eggplant slices after frying was investigated.

Results: Increasing the concentration of maltodextrin (0 to 20%) and salt (0 to 10%) in osmotic solution increased the dehydration, adsorption of solids and performance ratio in the eggplant slices significantly. The highest moisture loss (37%) and nearly the least oil absorption (9%) were related to the 20% salt-40% maltodextrin treatment. The highest oil absorption (37.3%) was observed in the control sample. The lowest shrinkage after frying (15.6%) was attributed to the 10% salt - 40% malt treatment.

Conclusion: Due to the low absorption of oil and almost the highest sensory scores, the best treatment for osmotic dehydration and frying of eggplant is 40% maltodextrin - 10% salt with 29% reduction in oil absorption.
Keywords: Eggplant, Frying, Maltodextrin, Oil absorption, Osmotic dehydration
Full-Text [PDF 710 kb]   (1024 Downloads)    
Article type: Research | Subject: Food Science
Received: 2019/05/18 | Accepted: 2019/08/26 | Published: 2020/03/25
References
1. Mokhtarian M, Tavakolipour H. Production of low-fat kiwi chips with aloe vera gel and determination of the mass transfer profile in deep fat frying. Iranian Journal of Nutrition Sciences & Food Technology. 2014;9(2):95-104. [in Persian]
2. De Jesus Junqueira JR, Corrêa JLG, de Mendonça KS, Resende NS, de Barros Vilas Boas EV. Influence of sodium replacement and vacuum pulse on the osmotic dehydration of eggplant slices. Innovative Food Science and Emerging Technologies. 2017;41:10-8. [DOI:10.1016/j.ifset.2017.01.006]
3. Ganjloo A, Bimakr M. Influence of sucrose solution concentration and temperature on mass exchange during osmotic dehydration of eggplant (Solanum melongena L.) cubes. International Food Research Journal. 2015;22(2):807-11.
4. Bahmani A, Jafari SM, Shahidi SA, Dehnad D. Mass Transfer Kinetics of Eggplant during Osmotic Dehydration by Neural Networks. J Food Process Preserv. 2016;40(5):815-27. [DOI:10.1111/jfpp.12435]
5. Lazarides HN, Fito P, Chiralt A, Gekas V, Lenart A. Advances in Osmotic Dehydration. In: Oliveira FAR, Oliveira JC, editors. Processing Foods: Quality Optimization and Process Assessment: CRC Press; 1999. p. 175-99. [DOI:10.1201/9781420049008.ch11]
6. Barat JM, Albors A, Chiralt A, Fito P. Equilibration of apple tissue in osmotic dehydration: microstructural changes. Drying Technology. 1999;17(7-8):1375-86. [DOI:10.1080/07373939908917621]
7. Singh H. Osmotic dehydration of carrot shreds for Gazraila preparation. J Food Sci Technol. 2001;38(2):152-4.
8. Krokida MK, Oreopoulou V, Maroulis ZB, Marinos-Kouris D. Effect of osmotic dedydration pretreatment on quality of french fries. Journal of Food Engineering. 2001;49(4):339-45. [DOI:10.1016/S0260-8774(00)00232-6]
9. Yao Z, Le Maguer M. Osmotic Dehydration: An Analysis of Fluxes and Shrinkage in Cellular Structure. Transactions of the ASAE. 1996;39(6):2211-6. [DOI:10.13031/2013.27727]
10. Torreggiani D. Osmotic dehydration in fruit and vegetable processing. Food Research International. 1993;26(1):59-68. [DOI:10.1016/0963-9969(93)90106-S]
11. Dalvi M, Daraii A, Aghajani N, Daneshpoor G, Hoseynian M, Mohamadi M. The effect of blanching and soaking in osmotic solutions on oil absorption and sensorial evaluation of potato chips. Food Technology & Nutrition. 2012;9(4):67-76. [in Persian]
12. Khezripour arab M, Hojjati M, Samavati V. Effect of maltodextrin coating on properties of French fries using Response Surface Methodology. J Food Sci Technol. 2017;13(60):25-36. [in Persian].
13. Moreira R, Chenlo F, Vallejo N, Gerbet L. Mass transfer analysis during osmotic dehydration of eggplant using binary solutions of sucrose and sodium chloride. Defect and Diffusion Forum. 2008;273-276:413-8. [DOI:10.4028/www.scientific.net/DDF.273-276.413]
14. De Jesus Junqueira JR, Corrêa JLG, de Mendonça KS, de Mello Júnior RE, de Souza AU. Pulsed Vacuum Osmotic Dehydration of Beetroot, Carrot and Eggplant Slices: Effect of Vacuum Pressure on the Quality Parameters. Food Bioprocess Technol. 2018;11(10):1863-75. [DOI:10.1007/s11947-018-2147-9]
15. Mai Tran TT, Chen XD, Southern C. Reducing oil content of fried potato crisps considerably using a 'sweet' pre-treatment technique. Journal of Food Engineering. 2007;80(2):719-26. [DOI:10.1016/j.jfoodeng.2006.06.031]
16. Ali HS, Abdel-Razek AG, Kamil MM. Effect of pre-frying treatments of french fried potatoes to achieve better oil uptake reduction for health and technological aspects. Journal of Applied Sciences Research. 2012;8(10):5018-24.
17. Rimac-Brnčić S, Lelas V, Rade D, Šimundić B. Decreasing of oil absorption in potato strips during deep fat frying. Journal of Food Engineering. 2004;64(2):237-41. [DOI:10.1016/j.jfoodeng.2003.10.006]
18. De Grandi Castro Freitas D, Berbari SAG, Prati P, Fakhouri FM, Collares Queiroz FP, Vicente E. Reducing fat uptake in cassava product during deep-fat frying. Journal of Food Engineering. 2009;94(3-4):390-4. [DOI:10.1016/j.jfoodeng.2009.04.005]
19. Hesham A. Eissa MTR, Hatem S. Ali and Gamal H. Ragab. Optimizing oil reduction in fried eggplant rings. Journal of Applied Sciences Research. 2013;6(9):3708-17.
20. AOAC. Horwitz W. Official Methods of Analysis of the Association of Official Analytical Chemists. 17 ed: Association Official Analytical Chemists Washington. D.C; 2000.
21. Watts BM, Ylimaki GL, Jeffery LE, L.G. E. Basic Sensory Methods for Food Evaluation: The International Development Research Center Ottawa, ISBN, Canada; 1989.
22. Khin MM, Zhou WB, Yeo SY. Mass transfer in the osmotic dehydration of coated apple cubes by using maltodextrin as the coating material and their textural properties. Journal of Food Engineering. 2007;81(3):514-22. [DOI:10.1016/j.jfoodeng.2006.12.005]
23. Azuara E, Beristain CI. Osmotic dehydration of apples by immersion in concentrated sucrose/maltodextrin solutions. J Food Process Preserv. 2002;26(4):295-306. [DOI:10.1111/j.1745-4549.2002.tb00486.x]
24. Moreira R, Chenlo F, Vallejo N, Gerbet L. Mass transfer analysis during osmotic dehydration of eggplant using binary solutions of sucrose and sodium chloride. In: Ochsner A, Murch GE, editors. Diffusion in Solids and Liquids Iii. Defect and Diffusion Forum. 273-276. Durnten-Zurich: Trans Tech Publications Ltd; 2008. p. 413-8. [DOI:10.4028/www.scientific.net/DDF.273-276.413]
25. Mayor L, Moreira R, Chenlo F, Sereno AM. Kinetics of osmotic dehydration of pumpkin with sodium chloride solutions. Journal of Food Engineering. 2006;74(2):253-62. [DOI:10.1016/j.jfoodeng.2005.03.003]
26. Singh B, Panesar PS, Nanda V, Kennedy JF. Optimisation of osmotic dehydration process of carrot cubes in mixtures of sucrose and sodium chloride solutions. Food Chem. 2010;123(3):590-600. [DOI:10.1016/j.foodchem.2010.04.075]
27. Badwaik LS, Choudhury S, Borah PK, Deka SC. Optimization of osmotic dehydration process of bamboo shoots in mixtures of sucrose and sodium chloride solutions. J Food Process Preserv. 2013;37(6):1068-77. [DOI:10.1111/j.1745-4549.2012.00807.x]
28. Mayor L, Moreira R, Chenlo F, Sereno AM. Mass transfer analysis during osmotic dehydration of pumpkin fruits using binary and ternary aqueous solutions of sucrose and sodium chloride. In: Ochsner A, Gracio J, editors. Diffusion in Solids and Liquids: Mass Diffusion. Defect and Diffusion Forum. 258-260. Durnten-Zurich: Trans Tech Publications Ltd; 2006. p. 213. [DOI:10.4028/www.scientific.net/DDF.258-260.213]
29. Azadfar E, Elhamirad AH, Sharifi A. Journal of Food Science and Technology. Investigation the effect of coating on eggplant slices on oil uptake reduction during frying. 2015;8(4):1-13. [in Persian]
30. Jorjani S, Hamrahi V. Effect of Guar and xanthan hydrocolloids on uptake of oil in eggplant rings during deep frying. Journal of Food Science Researches. 2015;25(2).
31. Saurel R, Raoult-Wack A-L, Rios G, Guilbert S. Mass transfer phenomena during osmotic dehydration of apple I. Fresh plant tissue. International Journal of Food Science & Technology. 2007;29(5):531-42. [DOI:10.1111/j.1365-2621.1994.tb02095.x]
32. Saurel R, Raoult-Wack A-L, Rios G, Guilbert S. Mass transfer phenomena during osmotic dehydration of apple II. Frozen plant tissue. International Journal of Food Science & Technology. 2007;29(5):543-50. [DOI:10.1111/j.1365-2621.1994.tb02096.x]

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