List of Articles Osmotic Dehydration

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  1 - An Investigation of Mass Transfer Phenomena during Osmotic Dehydration of Orange Slices
  A Harati H. Fatemian E. Hosseini Gh. H. Asadi F. Darvish
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  2 - Evaluation of the Effects of Osmotic Dehydration Pretreatment at Low Pressure on Texture, Colour and Oil Absorption of Vacuum Fried Kiwi Slices
  Fateme Aghabozorgi Afge Alireza Basiri Abdol Reza Mohamadi Nafchi
  Introduction: Vacuum osmotic dehydration is one of the methods of preservation of fruits and vegetable. The aim of this work is the evaluation of the effects of variables in osmotic dehydration process (ambient pressure, contact time of product and solution, concentrati More

  Introduction: Vacuum osmotic dehydration is one of the methods of preservation of fruits and vegetable. The aim of this work is the evaluation of the effects of variables in osmotic dehydration process (ambient pressure, contact time of product and solution, concentration and temperature of osmotic solution) on the quality factors of product (colour changes, texture, oil uptake) and finally achieving the optimum process conditions. Materials and Methods: A laboratory scale osmotic dehydration equipment including anaerobic jar, grid basket, vacuum pump, barometer and thermometer were used. The temperature range for osmotic solution (30 – 50° C), pressure (500-700 mbar), concentration of the osmotic solution (30- 50%) and contact time (60- 180 min) were employed. The test plans involving 31 tests were obtained by using response surface statistical models. The frying was carried out at 108ºC for 8 min and 320 mbar. Results: The optimum conditions of 48.71ºC for the osmotic solution temperature, 592.07 mbar for the pressure, 62.92 min for the time and 34.87% for the osmotic solution concentration were obtained. By applying the mentioned optimum conditions, the colour changes, oil absorption (g/100g) dry basis and texture (N/m) were found to be, 13.63, 14.82 and 2.78 respectively. Conclusion: The result showed that by increasing the osmotic solution temperature, texture rigidity is decreased and colour changes is increased. Colour changes, oil absorption and texture rigidity are decreased with increased osmotic solution concentration. Manuscript profile
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  3 - Modeling of Mass Transfer Kinetic During Osmotic Dehydration of Eggplant (Solanum Melongena L.)
  A.A. Bahmani S.M. Jafari S.A. Shahidi
  Introduction: The aim of this study is to investigate the effects of temperature, osmotic solution concentration and dehydration time on the mass transfer during osmotic dehydration of eggplant and then comparison of the mathematical models in order to select the best m More

  Introduction: The aim of this study is to investigate the effects of temperature, osmotic solution concentration and dehydration time on the mass transfer during osmotic dehydration of eggplant and then comparison of the mathematical models in order to select the best model for the mass transfer. Materials and Methods: Dehydration of the eggplant with the osmotic solutions containing 5, 10 and 15% salt and temperatures of 30, 45 and 60°C in a water bath at the ratio of eggplant slices to osmotic solution of 1:10, 1:15 and 1: 20 has taken place. Water loss and solid gain values ​​for each concentration and temperature at intervals of 0, 15, 30, 60, 90, 150, 210 and 270 minutes were determined respectively. Equilibrium values ​​ of water loss and solid gain were calculated by models as well as the rate of mass transfer. Results: The moisture content and mass transfer kinetics are functions of temperature and salt concentration changes over the time. The model proposed by some researchers (Azura model) with maximum Regression Coefficient and minimum root mean square error and the square sum error was compared to the Magee model that can describe the mass transfer kinetics better. The Azuara model in 1:15 ratio of osmotic solution of the sample resulted in a correlation coefficient of 0.9792 for water loss and of 0.9386 for solid gain as compared with 1:10 and 1:20 ratios that showed the best fit. Conclusion: The proposed model of Azuara regarding the maximum correlation and the minimum root mean square error and the sum of squared errors was recommended in order to model the mass transfer kinetics during osmotic dehydration of eggplant. Manuscript profile
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  4 - The Application of Neural Network Method for the Prediction of the Osmotic Factors of Crookneck Squash
  M. Mokhtarian H. Tavakolipour
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  5 - Comparison of Bath and Probe Sonication for Osmotic Dehydration of Peach Slices: Study on the Qualitative and Nutritional Properties
  B. Dehghan R. Esmaelzadeh Kenari
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  6 - Kinetic Modeling of Mass Transfer during Osmotic Dehydration of Ziziphus jujube
  V. Solgi M. Khavarpour P. Ariaii
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  7 - The Effect of Ultrasound-Assisted Osmotic Dehydration Pretreatment on the Convective Drying of Apple Slices (var.Golab)
  F. Shekar A. Javadi
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  8 - The effect of osmotic pretreatment on the density of hot-air-dried carrot
  جابر Soleimani نارملا Asefi
  Consumption of large amounts of fruits and vegetables throughout the world, have encouraged the development of various methods for their processing. Drying is considers as the most common method for preservation of vegetable and fruits. Although drying extend the shelf- More

  Consumption of large amounts of fruits and vegetables throughout the world, have encouraged the development of various methods for their processing. Drying is considers as the most common method for preservation of vegetable and fruits. Although drying extend the shelf-life, it has various side effects on keeping quality of these foods; including decreasing of the color and texture quality as well as missing the flavor and nutritional values. These negative effects have increased the demand for the discovering the alternative drying methods and consequently for the production of fresh-like products. The aim of this study was to introduce and optimize the novel method for the drying of carrot as well as to develop and optimize the quality of osmo-air-dried carrots with special respect to the color, flavor, texture, rehydration properties, density and shriveling of the product. For this, the effect of osmotic pretreatment on the density of carrot slices was investigated, using 50% glucose syrup +5% salt at 40°C with 150 rpm, followed by complementary drying step. The result of treated group was compared with control samples which were dried only by hot-air-drier. The results showed that using osmotic pretreatment could increase the density through inhibition of the product's shrinkage. Meanwhile, in air-dried samples the density was decreased considerably and high shrinkage was also observed.   Manuscript profile
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  9 - Effect of Osmo-air drying on quality of dried onion
  منصوره Mozaffary جابر Solaimani نارملا Asefi پریسا Jafarian
  Osmotic dehydration is a process of partial removing of water from food by immersion of the product in a hypertonic aqueous solution. This study aimed to investigate  the effect of osmotic dehydration on quality of hot- air- dried onion. Azarshahr red onion variety More

  Osmotic dehydration is a process of partial removing of water from food by immersion of the product in a hypertonic aqueous solution. This study aimed to investigate  the effect of osmotic dehydration on quality of hot- air- dried onion. Azarshahr red onion variety was used for the experiments. In order to define an optimum condition for osmo-drying process, some parameters including temperature, time and concentration of dehydration solution was evaluated. Based on water loss(WL) and solid gained (SG), the best treatment of temperature, time and concentration of dehydration solution were determined as 40˚C, 1 h and %5 respectively. One series of samples were prepared and dried in oven at 65˚C for 12 h. These samples were packed in two different ways including aluminium foil under the pressure of inert gas and in polyethylene packs. The samples were kept in ambient temperature. Every 2 months during storage period, parameters  such as rehydration and organoleptic properties were performed on the samples.The results organoleptic test revealed that, the quality of samples decreases after 4 months of storage.Moreover, the samples that were packed by polyethylene showed the most desirable properties. Among osmotic samples, the degree of rehydration of the sample prepared with concentration of % 5 in 40˚C in 1 hour and packed in foil under inert gas, was greater than the other osmotic samples. Rehydration parameters had direct relation with temperature and the time of rehydration. Therefore, the amount of rehydration improves with increasing time and temperature. Manuscript profile
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  10 - Optimization of Vacuum Frying Parameters in Combination with Osmotic Dehydration of Kiwi Slices to Produce Healthy Product
  Fatemeh Aghabozorg Afjeh Aghabozorg Afjeh Ali Bassiri Abdorreza Mohammadi Nafchi
  10.22034/jchr.2018.544052
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