Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer

Plectranthus amboinicus (lour) Spreng is the herbal species belongs to the family of Lamiaceae. The leaves of this species contain Thymol which is the main bioactive compound that has anti-inflammatory, antibacterial, antifungal and antioxidant properties. In this study, oven dryer has been chosen d...

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Main Authors: Mat Fuad, Nurafifah, Abdullah, Luqman Chuah, Mgt Ahmad, Puteri Farah Wahida
Format: Article
Language:English
Published: Elsevier 2018
Online Access:http://psasir.upm.edu.my/id/eprint/72340/1/Drying%20of%20Plectranthus%20amboinicus%20%28lour%29%20spreng%20leaves%20by%20using%20oven%20dryer.pdf
http://psasir.upm.edu.my/id/eprint/72340/
https://www.sciencedirect.com/science/article/abs/pii/S1881836616300581
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spelling my.upm.eprints.723402020-05-08T09:26:13Z http://psasir.upm.edu.my/id/eprint/72340/ Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer Mat Fuad, Nurafifah Abdullah, Luqman Chuah Mgt Ahmad, Puteri Farah Wahida Plectranthus amboinicus (lour) Spreng is the herbal species belongs to the family of Lamiaceae. The leaves of this species contain Thymol which is the main bioactive compound that has anti-inflammatory, antibacterial, antifungal and antioxidant properties. In this study, oven dryer has been chosen due to its easy handling and simple operation. The Plectranthus amboinicus leaves were dried under different temperatures at 50 °C, 60 °C, 70 °C and 80 °C using oven dryer. Drying took place at constant rate and falling rate period. The moisture ratio data were fitted to six thin layer models chosen from literature. Among these models, Midilli and Kucuk model was found to be the best model to represent the drying behaviour of Plectranthus amboinicus leaves due to the highest value of coefficient of determination (R2) and lowest values of root mean square error (RMSE) and reduced Chi-Square(χ2). Besides, the effective diffusivities varied from 1.167×10−10 to 4.451×10−10 m2/s which was within the general range for food material. Ultrasound-assisted extraction (UAE) was performed to analyse the quality of dried P. amboinicus leaves with ethanol as the solvent using probe sonicator (130 Watts, 20 kHz) with solid to solvent ratio 1:20 for 30 min. From gas chromatography analysis, leaves dried at 70 °C gave the highest concentration of thymol compared to drying at other temperatures. Elsevier 2018-10 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/72340/1/Drying%20of%20Plectranthus%20amboinicus%20%28lour%29%20spreng%20leaves%20by%20using%20oven%20dryer.pdf Mat Fuad, Nurafifah and Abdullah, Luqman Chuah and Mgt Ahmad, Puteri Farah Wahida (2018) Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer. Engineering in Agriculture, Environment and Food, 11 (4). 239 - 244. ISSN 1881-8366 https://www.sciencedirect.com/science/article/abs/pii/S1881836616300581 10.1016/j.eaef.2018.08.002
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Plectranthus amboinicus (lour) Spreng is the herbal species belongs to the family of Lamiaceae. The leaves of this species contain Thymol which is the main bioactive compound that has anti-inflammatory, antibacterial, antifungal and antioxidant properties. In this study, oven dryer has been chosen due to its easy handling and simple operation. The Plectranthus amboinicus leaves were dried under different temperatures at 50 °C, 60 °C, 70 °C and 80 °C using oven dryer. Drying took place at constant rate and falling rate period. The moisture ratio data were fitted to six thin layer models chosen from literature. Among these models, Midilli and Kucuk model was found to be the best model to represent the drying behaviour of Plectranthus amboinicus leaves due to the highest value of coefficient of determination (R2) and lowest values of root mean square error (RMSE) and reduced Chi-Square(χ2). Besides, the effective diffusivities varied from 1.167×10−10 to 4.451×10−10 m2/s which was within the general range for food material. Ultrasound-assisted extraction (UAE) was performed to analyse the quality of dried P. amboinicus leaves with ethanol as the solvent using probe sonicator (130 Watts, 20 kHz) with solid to solvent ratio 1:20 for 30 min. From gas chromatography analysis, leaves dried at 70 °C gave the highest concentration of thymol compared to drying at other temperatures.
format Article
author Mat Fuad, Nurafifah
Abdullah, Luqman Chuah
Mgt Ahmad, Puteri Farah Wahida
spellingShingle Mat Fuad, Nurafifah
Abdullah, Luqman Chuah
Mgt Ahmad, Puteri Farah Wahida
Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer
author_facet Mat Fuad, Nurafifah
Abdullah, Luqman Chuah
Mgt Ahmad, Puteri Farah Wahida
author_sort Mat Fuad, Nurafifah
title Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer
title_short Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer
title_full Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer
title_fullStr Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer
title_full_unstemmed Drying of Plectranthus amboinicus (lour) spreng leaves by using oven dryer
title_sort drying of plectranthus amboinicus (lour) spreng leaves by using oven dryer
publisher Elsevier
publishDate 2018
url http://psasir.upm.edu.my/id/eprint/72340/1/Drying%20of%20Plectranthus%20amboinicus%20%28lour%29%20spreng%20leaves%20by%20using%20oven%20dryer.pdf
http://psasir.upm.edu.my/id/eprint/72340/
https://www.sciencedirect.com/science/article/abs/pii/S1881836616300581
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score 13.18916