Chemical composition, antioxidant potential and antimicrobial activities of Ixora scheffleri subspecies keniensis essential oil

Abstract

Background: Essential oil (EO) obtained from Ixora scheffleri subspecies (subsp.) keniensis has valuable biological properties and can play a possible therapeutic role because of its antimicrobial and antioxidant nature.Aim: In this article, the chemical constituents, antimicrobial activity and antioxidant capacity of the EO obtained from Ixora scheffleri subsp. keniensis were determined using standard procedures.

Antioxidant assessment of characterised essential oils from Calophyllum inophyllum Linn using 2,2-diphenyl-1-picrylhydrazyl and hydrogen peroxide methods

“…Results obtained from the antioxidant assay are very consistent with the reported works in literature (Ajiboye et al 2017;Bhaskara et al 2015;Njenga & Mugo 2020).…”

“…2,2-diphenyl-1-picrylhydrazyl assay: The free radical scavenging activity of EOs from C. inophyllum Linn was determined using the stable DPPH radical (Ebrahimzadeh & Bahramian 2009;Njenga & Mugo 2020). The dark purple colour of DPPH is lost when it is reduced to non-radicals by antioxidants and decreases in its absorbance when monitored at a characteristic wavelength of 517 nm.…”

“…Hydrogen peroxide scavenging activity: The ability of EOs from C. inophyllum Linn to scavenge hydrogen peroxide was determined using the hydrogen peroxide scavenging assay at different concentrations (1.0 mg/mL -0.03125 mg/mL) (Kamalanathan et al 2015;Njenga & Mugo 2020;Serhat et al 2012). A solution of hydrogen peroxide (40 mM) was prepared in phosphate buffer at pH 7.4.…”