Total phenolic contents and antioxidant activities of selenium-rich black tea versus regular black tea

Simple item page
dc.citation.issue2
dc.citation.volume5
dc.contributor.authorNordin NH
dc.contributor.authorMolan A-L
dc.contributor.authorChua W
dc.contributor.authorKruger MC
dc.date.available3/04/2017
dc.date.issued3/04/2017
dc.description.abstractTwo black aqueous tea extracts of Camellia sinensis, (seleniumrich black tea (Se-BTE) and regular black tea (R-BTE)) were assessed for their total phenolic content (TPC) and antioxidant properties. Aqueous tea extracts were prepared using different extraction temperature and time. TPC was measured using the Folin-Ciocalteu method, while antioxidant activity was measured by ferric-reducing antioxidant power (FRAP) and 2,2-diphenyl-1- picrylhydrazyl (DPPH) assays. The R-BTE showed significantly higher TPC (P < 0.05) and antioxidant activity (P < 0.05) than the Se-BTE, which may be due to these being different cultivars, or differences in growing conditions. Our findings demonstrate that both extraction temperature and time are important determinants of extracted TPC and antioxidant activities of these teas. In addition and in contrary to our expectations, the high level of organic selenium in black tea did not enhance the antioxidant activity when compared with black tea containing very low level of organic selenium. Other elements and minerals may contribute to the high antioxidant activity detected in the regular black tea.
dc.description.confidentialFALSE
dc.format.extent40 - 50 (11)
dc.identifierhttp://www.diili.org/ojs-2.4.6/index.php/ajlsr/index
dc.identifier.citationAmerican Journal of Life Science Researches, 2017, 5 (2), pp. 40 - 50 (11)
dc.identifier.eissn2332-0206
dc.identifier.elements-id369629
dc.identifier.harvestedMassey_Dark
dc.identifier.issn2375-7485
dc.identifier.urihttps://hdl.handle.net/10179/11800
dc.languageEnglish
dc.publisherDIILI
dc.publisher.urihttp://www.diili.org/ojs-2.4.6/index.php/ajlsr/index
dc.relation.isPartOfAmerican Journal of Life Science Researches
dc.subjectselenium-rich black tea
dc.subjectregular black tea
dc.subjecttotal phenolic contents
dc.subjectferric-reducing/antioxidant power
dc.subjectDPPH-scavenging activity
dc.titleTotal phenolic contents and antioxidant activities of selenium-rich black tea versus regular black tea
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Health
pubs.organisational-group/Massey University/College of Health/School of Health Science
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
AmericanJournalofLifeScienceResearches.pdf
Size:
307.98 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Journal Articles