Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus

Orthosiphon stamineus is an herbal medicine plant that is commonly used in daily life to treat diseases. It has many medical properties that are contributed by polyphenol component. However, the properties will decline by thermal degradation once the heat treatment is applied to preserve the plant....

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Main Author:	Nishyanthi, Puspakaran
Format:	Undergraduates Project Papers
Language:	English
Published:	2014
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/10193/ http://umpir.ump.edu.my/id/eprint/10193/ http://umpir.ump.edu.my/id/eprint/10193/1/NISHYANTHI%20PUSPAKARAN.PDF

id	ump-10193
recordtype	eprints
spelling	ump-101932015-09-10T03:25:20Z http://umpir.ump.edu.my/id/eprint/10193/ Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus Nishyanthi, Puspakaran TJ Mechanical engineering and machinery Orthosiphon stamineus is an herbal medicine plant that is commonly used in daily life to treat diseases. It has many medical properties that are contributed by polyphenol component. However, the properties will decline by thermal degradation once the heat treatment is applied to preserve the plant. Previous studies have been done more on identifying the component and properties of 0. stamineus rather than studies on thermal degradation. Therefore, this study is aim to identify and investigate the effect of temperature on the thermal degradation of polyphenol from Orthosiphon stamineus leaves. Dry powdered leaves of 0. stamineus will be extracted by solvent extraction using ethanol to produce crude extract and then the heat treatment is carried out between temperatures from 70°C to 120°C at varies time interval. The UPLC analysis and total flavonoid content (TFC) are conducted before and after the heat treatment to analyse the thermal kinetic changes and these changes will be explained using best kinetic model that fits the data. The polyphenol thermal degradation can be identified for the used temperature range and the kinetic modelling can be developed from the kinetic changes; From the result, it can be proved that active components degraded when temperature and residence time increased during heat treatment and sinensetin showed larger degradation compared to rosmarinic acid where it showed less degradation. The data obtained from the experiment fitted well by both Hinrichs-Rademacher and Arrhenius equation using Microsoft Excel Solver and degradation rate constant increases when heating temperature increased and activation energy decreased. Therefore, it can be conclude that, higher temperature and residence time will increase the thermal degradation of bioactive component in Orthosiphon stamineus and the both Hinrichs-Rademacher and Arrhenius equation fitted the data. Result from this work may be useful to preserve the polyphenol content in Orthosiphon stamineus during processing involving thermal exposure that can retain the quality of the final product. 2014-06 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/10193/1/NISHYANTHI%20PUSPAKARAN.PDF Nishyanthi, Puspakaran (2014) Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus. Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:84915&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Nishyanthi, Puspakaran Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus
description	Orthosiphon stamineus is an herbal medicine plant that is commonly used in daily life to treat diseases. It has many medical properties that are contributed by polyphenol component. However, the properties will decline by thermal degradation once the heat treatment is applied to preserve the plant. Previous studies have been done more on identifying the component and properties of 0. stamineus rather than studies on thermal degradation. Therefore, this study is aim to identify and investigate the effect of temperature on the thermal degradation of polyphenol from Orthosiphon stamineus leaves. Dry powdered leaves of 0. stamineus will be extracted by solvent extraction using ethanol to produce crude extract and then the heat treatment is carried out between temperatures from 70°C to 120°C at varies time interval. The UPLC analysis and total flavonoid content (TFC) are conducted before and after the heat treatment to analyse the thermal kinetic changes and these changes will be explained using best kinetic model that fits the data. The polyphenol thermal degradation can be identified for the used temperature range and the kinetic modelling can be developed from the kinetic changes; From the result, it can be proved that active components degraded when temperature and residence time increased during heat treatment and sinensetin showed larger degradation compared to rosmarinic acid where it showed less degradation. The data obtained from the experiment fitted well by both Hinrichs-Rademacher and Arrhenius equation using Microsoft Excel Solver and degradation rate constant increases when heating temperature increased and activation energy decreased. Therefore, it can be conclude that, higher temperature and residence time will increase the thermal degradation of bioactive component in Orthosiphon stamineus and the both Hinrichs-Rademacher and Arrhenius equation fitted the data. Result from this work may be useful to preserve the polyphenol content in Orthosiphon stamineus during processing involving thermal exposure that can retain the quality of the final product.
format	Undergraduates Project Papers
author	Nishyanthi, Puspakaran
author_facet	Nishyanthi, Puspakaran
author_sort	Nishyanthi, Puspakaran
title	Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus
title_short	Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus
title_full	Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus
title_fullStr	Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus
title_full_unstemmed	Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus
title_sort	thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/10193/ http://umpir.ump.edu.my/id/eprint/10193/ http://umpir.ump.edu.my/id/eprint/10193/1/NISHYANTHI%20PUSPAKARAN.PDF
first_indexed	2023-09-18T22:09:32Z
last_indexed	2023-09-18T22:09:32Z
_version_	1777414934479503360

Thermodynamic study on polyphenol thermal degradation from orthosiphon stamineus

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