Objective To identify the chemical constituents and biological activities of essential oil and
crude methanol extract of Artemisia vulgaris (A. vulgaris) and Gaultheria fragrantissima (G.
fragrantissima). Methods Phytochemical screening, total phenolic and flavonoid content,
antibacterial activities, anti-oxidant assay of the crude extract were carried out to identify the
biological activities and phytonutrients present in the extract. Furthermore, the chemical
constituents present in the essential oil and crude methanol extract were analyzed using gas …

Objective To report the chemical composition and bioactivity (including antioxidant and
antimicrobial activity) of essential oils from the rhizomes, stems, and leaves of Etlingera
sayapensis (E. sayapensis) AD Poulsen & Ibrahim for the first time. Methods First, the
essential oils were obtained using a Clevenger-type apparatus. Then, the essential oils
compositions were identified by chromatography methods including GC-FID and GC–MS.
For the next step, DPPH radical scavenging activity (RSA), β-carotene bleaching (BCB), and …