Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments
The kinetics of thermal inactivation of peroxidase and colour changes in seedless guava (Psidium guajava L.) due to hot water blanching were studied in the temperature range of 80-95°C. Peroxidase inactivation kinetics followed a first-order Arrhenius model, where the activation energy and rate of t...
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| Language: | English |
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IDOSI Publications
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/15678/ http://psasir.upm.edu.my/id/eprint/15678/1/15678.pdf |
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| author | Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana |
| author_facet | Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana |
| author_sort | Ganjloo, Ali |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The kinetics of thermal inactivation of peroxidase and colour changes in seedless guava (Psidium guajava L.) due to hot water blanching were studied in the temperature range of 80-95°C. Peroxidase inactivation kinetics followed a first-order Arrhenius model, where the activation energy and rate of the reaction at a reference temperature of 87.5°C were 101.27±3 kJ mol-1 and 0.023±4×10-3s-1, respectively. Colour was quantified using the L, a, b in Hunter system. The results indicated that colour system parameters (L, a, b) followed a first-order Arrhenius kinetics model with activation energies (Ea) of 120.43±3, 86.45±5 and a 100.03±2, kJmol-1, respectively. The zero-order kinetic model was applied to total colour difference (TCD) resulting in activation energies of 111.65±5 kJmol-1. Good agreement was found between estimated and experimental data in all cases (R2>0.91). |
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| format | Article |
| id | upm-15678 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:04:01Z |
| publishDate | 2009 |
| publisher | IDOSI Publications |
| recordtype | eprints |
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| spelling | upm-156782020-06-16T01:53:35Z http://psasir.upm.edu.my/id/eprint/15678/ Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana The kinetics of thermal inactivation of peroxidase and colour changes in seedless guava (Psidium guajava L.) due to hot water blanching were studied in the temperature range of 80-95°C. Peroxidase inactivation kinetics followed a first-order Arrhenius model, where the activation energy and rate of the reaction at a reference temperature of 87.5°C were 101.27±3 kJ mol-1 and 0.023±4×10-3s-1, respectively. Colour was quantified using the L, a, b in Hunter system. The results indicated that colour system parameters (L, a, b) followed a first-order Arrhenius kinetics model with activation energies (Ea) of 120.43±3, 86.45±5 and a 100.03±2, kJmol-1, respectively. The zero-order kinetic model was applied to total colour difference (TCD) resulting in activation energies of 111.65±5 kJmol-1. Good agreement was found between estimated and experimental data in all cases (R2>0.91). IDOSI Publications 2009 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/15678/1/15678.pdf Ganjloo, Ali and Abdul Rahman, Russly and Bakar, Jamilah and Osman, Azizah and Bimakr, Mandana (2009) Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments. World Applied Sciences Journal, 7 (1). pp. 105-112. ISSN 1818-4952; ESSN: 1991-6426 https://www.idosi.org/wasj/wasj7(1)2009.htm |
| spellingShingle | Ganjloo, Ali Abdul Rahman, Russly Bakar, Jamilah Osman, Azizah Bimakr, Mandana Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments |
| title | Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments |
| title_full | Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments |
| title_fullStr | Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments |
| title_full_unstemmed | Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments |
| title_short | Modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (Psidium guajava L.) during thermal treatments |
| title_sort | modelling the kinetics of peroxidase inactivation and colour changes of seedless guava (psidium guajava l.) during thermal treatments |
| url | http://psasir.upm.edu.my/id/eprint/15678/ http://psasir.upm.edu.my/id/eprint/15678/ http://psasir.upm.edu.my/id/eprint/15678/1/15678.pdf |