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Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii

This study determined the levels of polyphenols, flavonoids, carotenoids and antioxidant activity of the edible red seaweed, Gracilaria changii. Freeze-dried G. changii powder was extracted using five solvent systems: 80 % ethanol, 80 % methanol, 80 % acetone, ethyl acetate and water. The antioxida...

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Main Authors: Pei, Teng Chan, Patricia, Matanjun, Suhaimi, Md Yasir, Tek, Song Tan
Format: Article
Language:English
Published: Springer Netherlands 2015
Subjects:
GE Environmental Sciences
Online Access:http://ir.unimas.my/id/eprint/13019/1/Antioxidant.pdf
http://ir.unimas.my/id/eprint/13019/
http://link.springer.com/article/10.1007/s10811-014-0493-1
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spelling my.unimas.ir.130192022-02-04T03:20:39Z http://ir.unimas.my/id/eprint/13019/ Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii Pei, Teng Chan Patricia, Matanjun Suhaimi, Md Yasir Tek, Song Tan GE Environmental Sciences This study determined the levels of polyphenols, flavonoids, carotenoids and antioxidant activity of the edible red seaweed, Gracilaria changii. Freeze-dried G. changii powder was extracted using five solvent systems: 80 % ethanol, 80 % methanol, 80 % acetone, ethyl acetate and water. The antioxidant activity of the extracts was measured using three assays, namely 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing power (FRAP) and β-carotene bleaching assays (BCB). The total phenolics (TPC) and total flavonoids content (TFC) and the total carotenoids content (TCC) were also determined. Ethanol extract had the highest yield followed by methanol > water > acetone > ethyl acetate extract. The radical scavenging effects of all the extracts showing dose-dependency properties with the ethyl acetate extract of G. changii exhibiting the highest radical scavenging effect (EC50 of 0.51±0.09 mg mL−1), while the water extract had the lowest scavenging effect of 7.80±0.57 mg mL−1. Ferric reducing power was in the following descending order: ethyl acetate > ethanol > methanol > acetone > water. TPC was highest in the ethyl acetate extract (21.57±2.58 mg PGE g−1) and least in the water extract (6.06±0.52 mg PGE g−1). The TFC of G. changii was in the range of 18.97±0.89–200.87± 3.61 mg RE g−1. The results revealed the effect of different extracting solvents in altering the antioxidant potential of G.changii, and ethyl acetate was identified as the most efficient solvent for extracting bioactive compounds from this red seaweed. Springer Netherlands 2015 Article PeerReviewed text en http://ir.unimas.my/id/eprint/13019/1/Antioxidant.pdf Pei, Teng Chan and Patricia, Matanjun and Suhaimi, Md Yasir and Tek, Song Tan (2015) Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii. Journal of Applied Phycology, 27 (6). pp. 2377-2386. ISSN 1573-5176 http://link.springer.com/article/10.1007/s10811-014-0493-1 DOI: 10.1007/s10811-014-0493-1
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
topic GE Environmental Sciences
spellingShingle GE Environmental Sciences
Pei, Teng Chan
Patricia, Matanjun
Suhaimi, Md Yasir
Tek, Song Tan
Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii
description This study determined the levels of polyphenols, flavonoids, carotenoids and antioxidant activity of the edible red seaweed, Gracilaria changii. Freeze-dried G. changii powder was extracted using five solvent systems: 80 % ethanol, 80 % methanol, 80 % acetone, ethyl acetate and water. The antioxidant activity of the extracts was measured using three assays, namely 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing power (FRAP) and β-carotene bleaching assays (BCB). The total phenolics (TPC) and total flavonoids content (TFC) and the total carotenoids content (TCC) were also determined. Ethanol extract had the highest yield followed by methanol > water > acetone > ethyl acetate extract. The radical scavenging effects of all the extracts showing dose-dependency properties with the ethyl acetate extract of G. changii exhibiting the highest radical scavenging effect (EC50 of 0.51±0.09 mg mL−1), while the water extract had the lowest scavenging effect of 7.80±0.57 mg mL−1. Ferric reducing power was in the following descending order: ethyl acetate > ethanol > methanol > acetone > water. TPC was highest in the ethyl acetate extract (21.57±2.58 mg PGE g−1) and least in the water extract (6.06±0.52 mg PGE g−1). The TFC of G. changii was in the range of 18.97±0.89–200.87± 3.61 mg RE g−1. The results revealed the effect of different extracting solvents in altering the antioxidant potential of G.changii, and ethyl acetate was identified as the most efficient solvent for extracting bioactive compounds from this red seaweed.
format Article
author Pei, Teng Chan
Patricia, Matanjun
Suhaimi, Md Yasir
Tek, Song Tan
author_facet Pei, Teng Chan
Patricia, Matanjun
Suhaimi, Md Yasir
Tek, Song Tan
author_sort Pei, Teng Chan
title Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii
title_short Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii
title_full Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii
title_fullStr Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii
title_full_unstemmed Antioxidant activities and polyphenolics of various solvent extracts of red seaweed, Gracilaria changii
title_sort antioxidant activities and polyphenolics of various solvent extracts of red seaweed, gracilaria changii
publisher Springer Netherlands
publishDate 2015
url http://ir.unimas.my/id/eprint/13019/1/Antioxidant.pdf
http://ir.unimas.my/id/eprint/13019/
http://link.springer.com/article/10.1007/s10811-014-0493-1
_version_ 1724078569826549760
score 13.211869

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