Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts

Ether, methanolic and aqueous extracts of lyophilized rambutan (Nephelium lappaceum L.) peels and seeds were evaluated for phenolic contents, antioxidant and antibacterial activities. High amounts of phenolic compounds were found in the peel extracts and the highest content was in the methanolic fra...

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Main Authors: Thitilertdecha N., Teerawutgulrag A., Rakariyatham N.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-50449085545&partnerID=40&md5=7ffd9b67bef1300134ffb2cd331c1450
http://cmuir.cmu.ac.th/handle/6653943832/5439
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-54392014-08-30T02:56:32Z Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts Thitilertdecha N. Teerawutgulrag A. Rakariyatham N. Ether, methanolic and aqueous extracts of lyophilized rambutan (Nephelium lappaceum L.) peels and seeds were evaluated for phenolic contents, antioxidant and antibacterial activities. High amounts of phenolic compounds were found in the peel extracts and the highest content was in the methanolic fraction (542.2 mg/g dry extract). Several potential antioxidant activities, including reducing power, β-carotene bleaching, linoleic peroxidation and free radical scavenging activity, were evaluated. The peel extracts exhibited higher antioxidant activity than the seed extracts in all methods determined (P < 0.05). The methanolic fraction was found to be the most active antioxidant as shown by their 50% DPPH{radical dot} inhibition concentration, 4.94 μg/mL. The results indicated this fraction exhibited greater DPPH{radical dot} radical scavenging activity than BHT and ascorbic acid (0.32 g dry extract/g BHT or ascorbic acid). Antibacterial activity against eight bacterial strains was assessed by disc diffusion and broth macrodilution methods. All peel extracts exhibited antibacterial activity against five pathogenic bacteria. The most sensitive strain, Staphylococcus epidermidis, was inhibited by the methanolic extract (MIC 2.0 mg/mL). © 2008 Swiss Society of Food Science and Technology. 2014-08-30T02:56:32Z 2014-08-30T02:56:32Z 2008 Article 00236438 10.1016/j.lwt.2008.01.017 LBWTA http://www.scopus.com/inward/record.url?eid=2-s2.0-50449085545&partnerID=40&md5=7ffd9b67bef1300134ffb2cd331c1450 http://cmuir.cmu.ac.th/handle/6653943832/5439 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Ether, methanolic and aqueous extracts of lyophilized rambutan (Nephelium lappaceum L.) peels and seeds were evaluated for phenolic contents, antioxidant and antibacterial activities. High amounts of phenolic compounds were found in the peel extracts and the highest content was in the methanolic fraction (542.2 mg/g dry extract). Several potential antioxidant activities, including reducing power, β-carotene bleaching, linoleic peroxidation and free radical scavenging activity, were evaluated. The peel extracts exhibited higher antioxidant activity than the seed extracts in all methods determined (P < 0.05). The methanolic fraction was found to be the most active antioxidant as shown by their 50% DPPH{radical dot} inhibition concentration, 4.94 μg/mL. The results indicated this fraction exhibited greater DPPH{radical dot} radical scavenging activity than BHT and ascorbic acid (0.32 g dry extract/g BHT or ascorbic acid). Antibacterial activity against eight bacterial strains was assessed by disc diffusion and broth macrodilution methods. All peel extracts exhibited antibacterial activity against five pathogenic bacteria. The most sensitive strain, Staphylococcus epidermidis, was inhibited by the methanolic extract (MIC 2.0 mg/mL). © 2008 Swiss Society of Food Science and Technology.
format Article
author Thitilertdecha N.
Teerawutgulrag A.
Rakariyatham N.
spellingShingle Thitilertdecha N.
Teerawutgulrag A.
Rakariyatham N.
Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts
author_facet Thitilertdecha N.
Teerawutgulrag A.
Rakariyatham N.
author_sort Thitilertdecha N.
title Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts
title_short Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts
title_full Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts
title_fullStr Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts
title_full_unstemmed Antioxidant and antibacterial activities of Nephelium lappaceum L. extracts
title_sort antioxidant and antibacterial activities of nephelium lappaceum l. extracts
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-50449085545&partnerID=40&md5=7ffd9b67bef1300134ffb2cd331c1450
http://cmuir.cmu.ac.th/handle/6653943832/5439
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