title: COMPARATIVE ASSESSMENT OF TOTAL PHENOLIC CONTENT IN SELECTED MEDICINAL PLANTS.
abstract: This study was to compare the total phenolic (TP) content in extracts from eleven plant materials collected at different geographical locations in Kenya, Nigeria, and USA. These plants have been selected because the majority of them are highly pigmented, from yellow to purple, and would therefore have economic value in industries for producing antioxidants and surfactants. Two of them were collected from the industrial and domestic waste outlets. Each analysis was achieved using the Folin-Ciocalteau technique. The order of decreasing phenolic acid content as gallic acid concentration (mg/g dry weight) was Prunus africana (55.14) > Acacia tortilis (42.11) > Khaya grandifoliola (17.54) > Curcuma longa (17.23) > Vernonia amygdalina (14.9)> Russelia equisetiformis (14.03) > Calendula officinalis (7.96) >Phragmites australis (control) (7.09) > Rauwolfia vomitoria (6.69) > Phragmites australis (industrial) (6.21) > Cnidoscolus aconitifolius (5.6). The TP contents of Spartina alterniflora species were below the detection limit.
authors.affiliation: Tai Sophia Institute for Healing Arts, Laurel, MD, USA.
authors.forename: C E
authors.initials: CE
authors.lastname: Johnson
authors.forename: F O
authors.initials: FO
authors.lastname: Oladeinde
authors.forename: A M
authors.initials: AM
authors.lastname: Kinyua
authors.forename: R
authors.initials: R
authors.lastname: Michelin
authors.forename: J M
authors.initials: JM
authors.lastname: Makinde
authors.forename: A A
authors.initials: AA
authors.lastname: Jaiyesimi
authors.forename: W N
authors.initials: WN
authors.lastname: Mbiti
authors.forename: G N
authors.initials: GN
authors.lastname: Kamau
authors.forename: W M
authors.initials: WM
authors.lastname: Kofi-Tsekpo
authors.forename: S
authors.initials: S
authors.lastname: Pramanik
authors.forename: A
authors.initials: A
authors.lastname: Williams
authors.forename: A
authors.initials: A
authors.lastname: Kennedy
authors.forename: Y
authors.initials: Y
authors.lastname: Bronner
authors.forename: K
authors.initials: K
authors.lastname: Clarke
authors.forename: P
authors.initials: P
authors.lastname: Fofonoff
authors.forename: D
authors.initials: D
authors.lastname: Nemerson