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dc.contributor.adviserVillalobos, Mizpah C.
dc.contributor.authorPelayo, Edgiel Jan G.
dc.date.accessioned2023-01-10T01:15:23Z
dc.date.available2023-01-10T01:15:23Z
dc.date.issued2022
dc.identifier.citationPelayo, E. J. G. (2022). Antioxidant activity, total phenolic and flavonoid content of bioactive fractions of Symplocos polyandra leaves (Unpublished thesis). Central Philippine University, Jaro, Iloilo City.en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12852/2415
dc.descriptionAbstract onlyen_US
dc.description.abstractSymplocos polyandra, locally known as balakbakan, is distributed throughout Southeast Asia, especially in the Philippines. The lack of available literature regarding the phytochemistry of this plant species prompted the conduct of testing of its potential antioxidant activity and quantification of its total flavonoid content and phenolic content. Balakbakan leaves were collected, exhaustively extracted with methanol, and fractionated on a silica gel column. 2,2-diphenyl-1-picrylhydrazyI (DPPH) assay showed that the acetone fraction has the highest percent DPPH radical inhibition with 86.41% at 500 ppm compared to 0.5 mM ascorbic acid at 87.61%. The acetone - methanol fraction has the highest ferric reducing capacity with a value of 208.24 μM ascorbic acid equivalents at 500 ppm. The total phenolic content of the different fractions ranged from 21.88 to 29.99 pg/mL catechin equivalents, with hexane - acetone fractions having the highest value. The flavonoid content ranged from 14.28 to 16.64 pg/mL catechin equivalents, with the methanol fraction having the highest value. The compounds responsible for the high antioxidant activity may not be a phenolic or flavonoid. Fractions from Symplocos polyandra are a promising source of bioactive compounds with antioxidant activity. Cytotoxicity test and analyses of alkaloid and chlorophyll content of the leaves is recommended for the leaves to be developed into tea products.en_US
dc.format.extentvii, 44 leavesen_US
dc.language.isoenen_US
dc.subject.ddcFilipiniana Theses 540.72 P361en_US
dc.subject.lcshAntioxidants--Analysisen_US
dc.subject.lcshAntioxidantsen_US
dc.subject.lcshPhenolsen_US
dc.subject.lcshPhenols--Analysisen_US
dc.subject.lcshFlavonoidsen_US
dc.subject.lcshFlavonoids--Analysisen_US
dc.subject.lcshLeavesen_US
dc.subject.lcshFoliar diagnosisen_US
dc.titleAntioxidant activity, total phenolic and flavonoid content of bioactive fractions of Symplocos polyandra leavesen_US
dc.typeThesisen_US
dcterms.accessRightsNot publicly accessibleen_US
dc.description.bibliographicalreferencesIncludes bibliographical referencesen_US
dc.contributor.chairBorlongan, Ilda G.
dc.contributor.committeememberJapitana, Ma. Mercy
dc.contributor.committeememberPanadero, Aira Rose P.
dc.contributor.departmentCollege of Arts and Sciencesen_US
dc.description.degreeBachelor of Science in Chemistryen_US
local.subjectBalakbakanen_US
local.subject.scientificnameSymplocos polyandraen_US


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