Sorption isotherms and isosteric heats of sorption of Malaysian paddy
Understanding the water sorption characteristics of cereal is extremely essential for optimizing the drying process and ensuring storage stability. Water relation of rough rice was studied at 20, 30, 40 and 50 °C over relative humidity (RH.) between 0.113 and 0.976 using the gravimetric technique. T...
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| Format: | Article |
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Springer
2014
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| author | Mousa, Wael Mohamad Ghazali, Farinazleen Selamat, Jinap Mohd Ghazali, Hasanah Radu, Son |
| author_facet | Mousa, Wael Mohamad Ghazali, Farinazleen Selamat, Jinap Mohd Ghazali, Hasanah Radu, Son |
| author_sort | Mousa, Wael |
| collection | UPM |
| description | Understanding the water sorption characteristics of cereal is extremely essential for optimizing the drying process and ensuring storage stability. Water relation of rough rice was studied at 20, 30, 40 and 50 °C over relative humidity (RH.) between 0.113 and 0.976 using the gravimetric technique. The isotherms displayed the general sigmoid, Type II pattern and exhibited the phenomenon of hysteresis where it was more pronounced at lower temperatures. The sorption characteristics were temperature dependence where the sorption capacity of the paddy increased as the temperature was decreased at fixed (RH). Among the models assessed for their ability to fit the sorption data, Oswin equation was the best followed by the third order polynomial, GAB, Smith, Chung-Pfost, and Henderson models. The monolayer moisture content was higher for desorption than adsorption and tend to decrease with the increase in temperature. Given the temperature dependence of the sorption isotherms the isosteric heats of sorption were calculated using Claussius-Clapeyron equation. The net isosteric heats decreased as the moisture content was increased and heats of desorption were greater than that of adsorption. |
| first_indexed | 2024-03-06T08:32:17Z |
| format | Article |
| id | upm.eprints-35422 |
| institution | Universiti Putra Malaysia |
| last_indexed | 2024-03-06T08:32:17Z |
| publishDate | 2014 |
| publisher | Springer |
| record_format | dspace |
| spelling | upm.eprints-354222016-01-11T01:35:26Z http://psasir.upm.edu.my/id/eprint/35422/ Sorption isotherms and isosteric heats of sorption of Malaysian paddy Mousa, Wael Mohamad Ghazali, Farinazleen Selamat, Jinap Mohd Ghazali, Hasanah Radu, Son Understanding the water sorption characteristics of cereal is extremely essential for optimizing the drying process and ensuring storage stability. Water relation of rough rice was studied at 20, 30, 40 and 50 °C over relative humidity (RH.) between 0.113 and 0.976 using the gravimetric technique. The isotherms displayed the general sigmoid, Type II pattern and exhibited the phenomenon of hysteresis where it was more pronounced at lower temperatures. The sorption characteristics were temperature dependence where the sorption capacity of the paddy increased as the temperature was decreased at fixed (RH). Among the models assessed for their ability to fit the sorption data, Oswin equation was the best followed by the third order polynomial, GAB, Smith, Chung-Pfost, and Henderson models. The monolayer moisture content was higher for desorption than adsorption and tend to decrease with the increase in temperature. Given the temperature dependence of the sorption isotherms the isosteric heats of sorption were calculated using Claussius-Clapeyron equation. The net isosteric heats decreased as the moisture content was increased and heats of desorption were greater than that of adsorption. Springer 2014 Article PeerReviewed Mousa, Wael and Mohamad Ghazali, Farinazleen and Selamat, Jinap and Mohd Ghazali, Hasanah and Radu, Son (2014) Sorption isotherms and isosteric heats of sorption of Malaysian paddy. Journal of Food Science and Technology, 51 (10). pp. 2656-2663. ISSN 0022-1155; ESSN: 0975-8402 http://link.springer.com/article/10.1007%2Fs13197-012-0799-4 10.1007/s13197-012-0799-4 |
| spellingShingle | Mousa, Wael Mohamad Ghazali, Farinazleen Selamat, Jinap Mohd Ghazali, Hasanah Radu, Son Sorption isotherms and isosteric heats of sorption of Malaysian paddy |
| title | Sorption isotherms and isosteric heats of sorption of Malaysian paddy |
| title_full | Sorption isotherms and isosteric heats of sorption of Malaysian paddy |
| title_fullStr | Sorption isotherms and isosteric heats of sorption of Malaysian paddy |
| title_full_unstemmed | Sorption isotherms and isosteric heats of sorption of Malaysian paddy |
| title_short | Sorption isotherms and isosteric heats of sorption of Malaysian paddy |
| title_sort | sorption isotherms and isosteric heats of sorption of malaysian paddy |
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