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Authors
Affiliations
1 Department of Agricultural Engineering, Krishi Vigyan Kendra (B.A.U.)Sahibganj Jharkhand, IN
2 Department of Processing and food Engineering, College of Technology and Agricultural Engineering, Maharana Pratap University of Agriculture and Technology, Udhaipur Rajastan, IN
3 Krishi Vigyan Kendra (B.A.U. ) Sahibganj Jharkhand, IN
Source
International Journal of Agricultural Engineering, Vol 6, No 1 (2013), Pagination: 116–120
Abstract
The effect of different drying conditions on total drying time, ascorbic acid content, colour and water activity of osmo-dehydrated button mushroom slices were investigated at 45, 55, 65, 75 and 850C drying temperature and 1.0, 1.5 and 2.0 m/s air velocities. The retention of ascorbic acid was found to be increased with decrease in drying temperature from 85 to 650C and it decreased with further decrease in drying air temperature to 450C. Similarly, with respect to individual effect of velocity, the sample dried with lower velocity (1.0 m/s) recorded highest ascorbic acid (27.24 mg/100 g dm). As the temperature increased, L-value of colour was increased from 450C to 650C, means sample became lighter in colour and thereafter decreased at 750C. The sample dried with 2.0 m/s drying air velocity was found significantly superior with better colour (49.91). Sample with lowest water activity (0.228) was one dried at 850C drying temperature and 2.0 m/s drying air velocity and was significantly superior over the sample dried by all other combinations of temperature and velocity.
Keywords
Temperature, Air-velocity, Ascorbic Acid, Colour (L-value), Water Activity
