Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying
The effects of air temperature and product size on drying kinetics, retained total polyphenol content (TPC), hardness kinetics and total colour change (ΔE) kinetics of ciku (Manilkara zapota) were investigated. In addition, five terms of the theoretical model were used to estimate the effective diff...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Gadjah Mada University
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/15390/ http://psasir.upm.edu.my/id/eprint/15390/1/Kinetics%20of%20mass%20transfer%2C%20colour%2C%20total%20polyphenol%20and%20texture%20change%20of%20Manilkara%20zapota%20during%20convective%20air%20drying.pdf |
| _version_ | 1848842664273772544 |
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| author | Chong, Chien Hwa Law, Chung Lim Cloke, Michael Abdullah, Luqman Chuah Wan Daud, Wan Ramli |
| author_facet | Chong, Chien Hwa Law, Chung Lim Cloke, Michael Abdullah, Luqman Chuah Wan Daud, Wan Ramli |
| author_sort | Chong, Chien Hwa |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The effects of air temperature and product size on drying kinetics, retained total polyphenol content (TPC), hardness kinetics and total colour change (ΔE) kinetics of ciku (Manilkara zapota) were investigated. In addition, five terms of the theoretical model were used to estimate the effective diffusivity values during drying at temperatures from 40°C to 70°C. The drying rates of dried ciku were increased with increasing temperature and decreasing product size. It was found that hardness of ciku dried at temperature higher than 60°C increased significantly, when the moisture content was reduced to less than 0.5 g H2O/g DM (dry basis). In terms of nutritional value, the retained total polyphenol content (TPC) of dried ciku in hot air drying also increasing with temperature. The highest retained TPC was 141 mg GAE/ 100g of samples, which can be obtained from drying at 70°C. |
| first_indexed | 2025-11-15T08:02:43Z |
| format | Article |
| id | upm-15390 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:02:43Z |
| publishDate | 2009 |
| publisher | Gadjah Mada University |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-153902019-07-08T07:35:59Z http://psasir.upm.edu.my/id/eprint/15390/ Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying Chong, Chien Hwa Law, Chung Lim Cloke, Michael Abdullah, Luqman Chuah Wan Daud, Wan Ramli The effects of air temperature and product size on drying kinetics, retained total polyphenol content (TPC), hardness kinetics and total colour change (ΔE) kinetics of ciku (Manilkara zapota) were investigated. In addition, five terms of the theoretical model were used to estimate the effective diffusivity values during drying at temperatures from 40°C to 70°C. The drying rates of dried ciku were increased with increasing temperature and decreasing product size. It was found that hardness of ciku dried at temperature higher than 60°C increased significantly, when the moisture content was reduced to less than 0.5 g H2O/g DM (dry basis). In terms of nutritional value, the retained total polyphenol content (TPC) of dried ciku in hot air drying also increasing with temperature. The highest retained TPC was 141 mg GAE/ 100g of samples, which can be obtained from drying at 70°C. Gadjah Mada University 2009 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/15390/1/Kinetics%20of%20mass%20transfer%2C%20colour%2C%20total%20polyphenol%20and%20texture%20change%20of%20Manilkara%20zapota%20during%20convective%20air%20drying.pdf Chong, Chien Hwa and Law, Chung Lim and Cloke, Michael and Abdullah, Luqman Chuah and Wan Daud, Wan Ramli (2009) Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying. ASEAN Journal of Chemical Engineering, 9 (1). pp. 47-59. ISSN 1655-4418 http://aseanjche.ugm.ac.id/ojs/index.php/jce/article/view/220 |
| spellingShingle | Chong, Chien Hwa Law, Chung Lim Cloke, Michael Abdullah, Luqman Chuah Wan Daud, Wan Ramli Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying |
| title | Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying |
| title_full | Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying |
| title_fullStr | Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying |
| title_full_unstemmed | Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying |
| title_short | Kinetics of mass transfer, colour, total polyphenol and texture change of Manilkara zapota during convective air drying |
| title_sort | kinetics of mass transfer, colour, total polyphenol and texture change of manilkara zapota during convective air drying |
| url | http://psasir.upm.edu.my/id/eprint/15390/ http://psasir.upm.edu.my/id/eprint/15390/ http://psasir.upm.edu.my/id/eprint/15390/1/Kinetics%20of%20mass%20transfer%2C%20colour%2C%20total%20polyphenol%20and%20texture%20change%20of%20Manilkara%20zapota%20during%20convective%20air%20drying.pdf |