Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract

The ethanol extracts from 24 samples plant species commonly found in Thailand were investigated and compared on their antioxidant activity by ABTS assay. The ethanol extract from the leaves of guava (Psidium guajava) showed the highest antioxidant capacity with the TEAC value of 4.908 ± 0.050 mM/mg,...

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Main Authors: Suganya Tachakittirungrod, Siriporn Okonogi, Sombat Chowwanapoonpohn
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/60835
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-608352018-09-10T04:00:11Z Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract Suganya Tachakittirungrod Siriporn Okonogi Sombat Chowwanapoonpohn Agricultural and Biological Sciences The ethanol extracts from 24 samples plant species commonly found in Thailand were investigated and compared on their antioxidant activity by ABTS assay. The ethanol extract from the leaves of guava (Psidium guajava) showed the highest antioxidant capacity with the TEAC value of 4.908 ± 0.050 mM/mg, followed by the fruit peels of rambutan (Nephelium lappaceum) and mangosteen (Garcinia mangostana) with the TEAC values of 3.074 ± 0.003 and 3.001 ± 0.016 mM/mg, respectively. The further investigation of guava leaf extracts from different solvents; n-hexane, ethyl acetate, n-butanol, and methanol, was examined using ABTS and FRAP assays. The total phenolic content was done by Folin-Ciocalteu reaction. The results indicated that the methanol fraction possessed the highest antioxidant activity, followed by the butanol and ethyl acetate fractions, respectively. The hexane fraction showed the lowest antioxidant activity. The results demonstrated that the mechanism of antioxidant action of guava leaf extracts was free radical scavenging and reducing of oxidized intermediates. The phenolic content in guava leaf fraction played a significant role on the antioxidant activity via reducing mechanisms. © 2006 Elsevier Ltd. All rights reserved. 2018-09-10T04:00:11Z 2018-09-10T04:00:11Z 2007-02-16 Journal 03088146 2-s2.0-33846908250 10.1016/j.foodchem.2006.07.034 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33846908250&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/60835
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
Suganya Tachakittirungrod
Siriporn Okonogi
Sombat Chowwanapoonpohn
Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract
description The ethanol extracts from 24 samples plant species commonly found in Thailand were investigated and compared on their antioxidant activity by ABTS assay. The ethanol extract from the leaves of guava (Psidium guajava) showed the highest antioxidant capacity with the TEAC value of 4.908 ± 0.050 mM/mg, followed by the fruit peels of rambutan (Nephelium lappaceum) and mangosteen (Garcinia mangostana) with the TEAC values of 3.074 ± 0.003 and 3.001 ± 0.016 mM/mg, respectively. The further investigation of guava leaf extracts from different solvents; n-hexane, ethyl acetate, n-butanol, and methanol, was examined using ABTS and FRAP assays. The total phenolic content was done by Folin-Ciocalteu reaction. The results indicated that the methanol fraction possessed the highest antioxidant activity, followed by the butanol and ethyl acetate fractions, respectively. The hexane fraction showed the lowest antioxidant activity. The results demonstrated that the mechanism of antioxidant action of guava leaf extracts was free radical scavenging and reducing of oxidized intermediates. The phenolic content in guava leaf fraction played a significant role on the antioxidant activity via reducing mechanisms. © 2006 Elsevier Ltd. All rights reserved.
format Journal
author Suganya Tachakittirungrod
Siriporn Okonogi
Sombat Chowwanapoonpohn
author_facet Suganya Tachakittirungrod
Siriporn Okonogi
Sombat Chowwanapoonpohn
author_sort Suganya Tachakittirungrod
title Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract
title_short Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract
title_full Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract
title_fullStr Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract
title_full_unstemmed Study on antioxidant activity of certain plants in Thailand: Mechanism of antioxidant action of guava leaf extract
title_sort study on antioxidant activity of certain plants in thailand: mechanism of antioxidant action of guava leaf extract
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33846908250&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/60835
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