Research Article

Phytochemical Screening and Potential Antibacterial Activity of Defatted and Nondefatted Methanolic Extracts of Xao Tam Phan (Paramignya trimera (Oliv.) Guillaum) Peels against Multidrug-Resistant Bacteria

Table 1

Phytochemical analysis of the nondefatted peel (NDP) and defatted peel (DP) of P. trimera.

TestObservationNDPDP

Alkaloid
 BouchardatFormation of brown precipitate
 MayerFormation of yellow-white precipitate+
 DragendorffFormation of orange precipitate+
Flavonoids
 Alkaline reagentAppearance of yellow colour, become colourless when adding diluted HCl solution+++++
Glycosides
 SalkowskiAppearance of reddish colour+++++
TerpenoidsFormation of grey colour+++
TanninsFormation of blue or green colour
CoumarinsFormation of yellow colour++++
SaponinsFormation of foam
SteroidsAppearance of red colour+++
AnthraquinonesAppearance of pink/red/violet solution