Indian Journal of Agricultural Research

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Research Article

Indian Journal of Agricultural Research, volume 51 issue 3 (june 2017) : 267-271

Moisture desorption isotherms of fresh Jamun (Syzygium cumini) fruit

S. Biswal*, M. Mohapatra, M.K. Panda, S.K. Dash
1<p>Department of Agricultural Processing and Food Engineering, College of Agricultural Engineering and Technology,&nbsp;Orissa University of Agriculture and Technology, &nbsp;Bhubaneswar- 751003, Odisha, India</p>
Cite article:- Biswal* S., Mohapatra M., Panda M.K., Dash S.K. (2017). Moisture desorption isotherms of fresh Jamun (Syzygium cumini) fruit . Indian Journal of Agricultural Research. 51(3): 267-271. doi: 10.18805/ijare.v51i03.7917.

ABSTRACT

Moisture desorption isotherms of fresh Jamun fruit, were investigated using the methods of AOAC. Equilibrium moisture content of the samples were measured at three temperature levels viz., 5, 10 and 25 °C and nine relative humidity conditions in the range of 10-90% approximately using MSI jar. The sorption isotherms of jamun fruit followed type III (J-shaped) isotherms, characteristic of high sugar products. The reverse temperature effect occurred at water activity, aw >0.75, resulting in a crossing over of the sorption curves for the adsorption isotherms only. The application of the GAB model to the experimental data, using direct nonlinear regression analysis, provided agreement between the experimental and predicted values. The GAB model parameters monolayer moisture content (Mo) and heat of sorption for monolayer (C) were found to decrease with increasing temperature.

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