Effects of phenolic antioxidants extraction from four selected seaweeds obtained from Sabah
Algal have attracted attention from biomedical scientists as they are a valuable natural source of secondary metabolites that exhibit antioxidant activities. In this study, single-factor experiments were conducted to investigate the best extraction conditions (ethanol concentration, solid-to-solvent ratio, extraction temperature and extraction time) in extracting antioxidant compounds and capacities from four species of seaweeds ( Sargassum polycystum, Eucheuma denticulatum , Kappaphycus alvarezzi variance Buaya and Kappaphycus alvarezzi variance Giant ) from Sabah. Total phenolic content (TPC... Mehr ...
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Dokumenttyp: | posted-content |
Erscheinungsdatum: | 2015 |
Verlag/Hrsg.: |
PeerJ
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Sprache: | unknown |
Permalink: | https://search.fid-benelux.de/Record/base-27278545 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | http://dx.doi.org/10.7287/peerj.preprints.1249 |
Algal have attracted attention from biomedical scientists as they are a valuable natural source of secondary metabolites that exhibit antioxidant activities. In this study, single-factor experiments were conducted to investigate the best extraction conditions (ethanol concentration, solid-to-solvent ratio, extraction temperature and extraction time) in extracting antioxidant compounds and capacities from four species of seaweeds ( Sargassum polycystum, Eucheuma denticulatum , Kappaphycus alvarezzi variance Buaya and Kappaphycus alvarezzi variance Giant ) from Sabah. Total phenolic content (TPC) and total flavonoid content (TFC) assays were used to determine the phenolic and flavonoid concentrations, respectively, while 2,2-azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and 2,2-diphenyl-1-picylhydrazyl (DPPH) radical scavenging capacity assays were used to evaluate the antioxidant capacities of all seaweed extracts. Results showed that extraction parameters had significant effect (p < 0.05) on the antioxidant compounds and antioxidant capacities of seaweed. Sargassum polycystum portrayed the most antioxidant compounds (37.41 ± 0.01 mg GAE/g DW and 4.54 ± 0.02 mg CE/g DW) and capacities (2.00 ± 0.01 µmol TEAC/g DW and 0.84 ± 0.01 µmol TEAC/g DW) amongst four species of seaweed. Single-factor experiments were proven as an effective tool to determine and quantify the relationship between a single factor and a single response variable.