Color kinetics of longan flesh drying at high temperature

The aim of this study was to investigate the color kinetics during hot air drying of longan flesh at high temperatures. The longan of E-dor variety (Dimocarpus Longan Lour.) was used in this study. The sample sizes of 25-30 mm in diameter with the initial moisture content of 470-510% dry basis were...

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Main Authors: Chunthaworn S., Achariyaviriya S., Achariyaviriya A., Namsanguan K.
Format: Conference or Workshop Item
Published: Elsevier BV 2015
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http://cmuir.cmu.ac.th/handle/6653943832/39024
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-390242015-06-16T08:01:13Z Color kinetics of longan flesh drying at high temperature Chunthaworn S. Achariyaviriya S. Achariyaviriya A. Namsanguan K. Engineering (all) The aim of this study was to investigate the color kinetics during hot air drying of longan flesh at high temperatures. The longan of E-dor variety (Dimocarpus Longan Lour.) was used in this study. The sample sizes of 25-30 mm in diameter with the initial moisture content of 470-510% dry basis were tested. The experiments were carried out in the laboratory dryer at the drying air temperature of 60-130°C. Kinetic parameters for the color change were determined using CIE system measuring L*, a* and b* values. These values were used to calculate the total color difference (ΔE), chroma and hue angle. The data of L*, a*, b* and ΔE were fitted to various kinetic models. It was found that the modified kinetic model (second order polynomial equation) provided the best fit of the data of L* and b*. The zero-order kinetic model was found to be the most suitable for describing the a* data and this model was found to be effective for representing the changes in ΔE values. Both models could predict the color change during drying relatively well. The simulated results showed that the drying air temperature and drying time affected the color change during the drying processes. The value of L* decreased when the drying time and temperature increased. The values of a*, b* and ΔE increased in the first period of drying afterwards these values decreased with drying time and drying air temperature. © 2010 Published by Elsevier Ltd. 2015-06-16T08:01:13Z 2015-06-16T08:01:13Z 2012-12-01 Conference Paper 18777058 2-s2.0-84884581172 10.1016/j.proeng.2012.01.1243 http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84884581172&origin=inward http://cmuir.cmu.ac.th/handle/6653943832/39024 Elsevier BV
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Engineering (all)
spellingShingle Engineering (all)
Chunthaworn S.
Achariyaviriya S.
Achariyaviriya A.
Namsanguan K.
Color kinetics of longan flesh drying at high temperature
description The aim of this study was to investigate the color kinetics during hot air drying of longan flesh at high temperatures. The longan of E-dor variety (Dimocarpus Longan Lour.) was used in this study. The sample sizes of 25-30 mm in diameter with the initial moisture content of 470-510% dry basis were tested. The experiments were carried out in the laboratory dryer at the drying air temperature of 60-130°C. Kinetic parameters for the color change were determined using CIE system measuring L*, a* and b* values. These values were used to calculate the total color difference (ΔE), chroma and hue angle. The data of L*, a*, b* and ΔE were fitted to various kinetic models. It was found that the modified kinetic model (second order polynomial equation) provided the best fit of the data of L* and b*. The zero-order kinetic model was found to be the most suitable for describing the a* data and this model was found to be effective for representing the changes in ΔE values. Both models could predict the color change during drying relatively well. The simulated results showed that the drying air temperature and drying time affected the color change during the drying processes. The value of L* decreased when the drying time and temperature increased. The values of a*, b* and ΔE increased in the first period of drying afterwards these values decreased with drying time and drying air temperature. © 2010 Published by Elsevier Ltd.
format Conference or Workshop Item
author Chunthaworn S.
Achariyaviriya S.
Achariyaviriya A.
Namsanguan K.
author_facet Chunthaworn S.
Achariyaviriya S.
Achariyaviriya A.
Namsanguan K.
author_sort Chunthaworn S.
title Color kinetics of longan flesh drying at high temperature
title_short Color kinetics of longan flesh drying at high temperature
title_full Color kinetics of longan flesh drying at high temperature
title_fullStr Color kinetics of longan flesh drying at high temperature
title_full_unstemmed Color kinetics of longan flesh drying at high temperature
title_sort color kinetics of longan flesh drying at high temperature
publisher Elsevier BV
publishDate 2015
url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84884581172&origin=inward
http://cmuir.cmu.ac.th/handle/6653943832/39024
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