Determination of antioxidant activities, total phenolic and flavanoid contents in Bougainvillea glabra bracts at various methanol concentrations

Shalini Markandan, Aminah Abdullah, Khalid Hamid Musa, Vimala Subramaniam, Katherine Stockham

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The Bougainvillea glabra bract was extracted using three ratios of methanolic solvents at 50%, 70% and 100%. In this study, the methanolic extracts of B. glabra bract were evaluated for antioxidant properties and quantification of phenolics and flavanoids. Methanol at 100% was the highest extraction efficiency among three other methanolic with yield value of 38%. The content of phenolics and flavonoids of B. glabra bracts in methanol 100% were 63.92±0.90 GAE mg/100g and 249.53±26.20 QE mg/100g respectively. The antioxidant activity was measured using three different bioassays namely, DPPH, ABTS and FRAP. The results were expressed as mg Trolox equivalent per 100 g where Trolox is a vitamin E analog. Among these methanol extracts, highest antioxidant capacity was observed in the pure methanol concentration. Positive correlation was observed in B. glabra bract between DPPH assay and TPC, r2=1.00. The methanol extract at 100% was rich in polyphenolics, which indicating that the B. glabra bract has the potential to be recommended as a good dietary source of natural antioxidants.

Original languageEnglish
Title of host publication2016 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2016 Postgraduate Colloquium
PublisherAmerican Institute of Physics Inc.
Volume1784
ISBN (Electronic)9780735414464
DOIs
Publication statusPublished - 17 Nov 2016
Event2016 Postgraduate Colloquium of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology, UKM FST 2016 - Selangor, Malaysia
Duration: 13 Apr 201614 Apr 2016

Other

Other2016 Postgraduate Colloquium of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology, UKM FST 2016
CountryMalaysia
CitySelangor
Period13/4/1614/4/16

Fingerprint

antioxidants
methyl alcohol
tocopherol
bioassay
analogs

Keywords

  • antioxidant
  • Bougainvillea glabra
  • methanolic extraction
  • polyphenolics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Markandan, S., Abdullah, A., Musa, K. H., Subramaniam, V., & Stockham, K. (2016). Determination of antioxidant activities, total phenolic and flavanoid contents in Bougainvillea glabra bracts at various methanol concentrations. In 2016 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2016 Postgraduate Colloquium (Vol. 1784). [030038] American Institute of Physics Inc.. https://doi.org/10.1063/1.4966776

Determination of antioxidant activities, total phenolic and flavanoid contents in Bougainvillea glabra bracts at various methanol concentrations. / Markandan, Shalini; Abdullah, Aminah; Musa, Khalid Hamid; Subramaniam, Vimala; Stockham, Katherine.

2016 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2016 Postgraduate Colloquium. Vol. 1784 American Institute of Physics Inc., 2016. 030038.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Markandan, S, Abdullah, A, Musa, KH, Subramaniam, V & Stockham, K 2016, Determination of antioxidant activities, total phenolic and flavanoid contents in Bougainvillea glabra bracts at various methanol concentrations. in 2016 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2016 Postgraduate Colloquium. vol. 1784, 030038, American Institute of Physics Inc., 2016 Postgraduate Colloquium of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology, UKM FST 2016, Selangor, Malaysia, 13/4/16. https://doi.org/10.1063/1.4966776
Markandan S, Abdullah A, Musa KH, Subramaniam V, Stockham K. Determination of antioxidant activities, total phenolic and flavanoid contents in Bougainvillea glabra bracts at various methanol concentrations. In 2016 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2016 Postgraduate Colloquium. Vol. 1784. American Institute of Physics Inc. 2016. 030038 https://doi.org/10.1063/1.4966776
Markandan, Shalini ; Abdullah, Aminah ; Musa, Khalid Hamid ; Subramaniam, Vimala ; Stockham, Katherine. / Determination of antioxidant activities, total phenolic and flavanoid contents in Bougainvillea glabra bracts at various methanol concentrations. 2016 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2016 Postgraduate Colloquium. Vol. 1784 American Institute of Physics Inc., 2016.
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