Author(s): Maryam Khosravinezhad, Ebrahim Talebi, Shivakumar, Zahra Nemati and Iman Nasrollahi

Abstract: A scientific experiment was conducted by utilizing herbal essential oil plants of Oliveria decumbens Vent by subjecting to extraction of essential oil through the standard microwave assisted hydro distillation (MAHD) method. The chemical composition of the essential oil detected with GC/MS technique. The obtained results clearly quantified main components oil like, m-thymol (34.80%), thymol (34.36%), myristicin (20.88%), etc. Further, antimicrobial activity of Oliveria decumbens Vent oil was noticed, which clearly showed on gram-positive and gram-negative effects respectively and some of the fungal species too. However, antibacterial activity against gram positive bacteria, Staphylococcus aureus was respected MIC=8 and antifungal activity against alternaria fungus was MIC=16 clearly noticed. Morever, antioxidant activity was determined with DPPH oil through which obtained results was antioxidant activity of oil (IC₅₀ = 2.73 ± 0.172) recorded. Apart, total phenol reagent with Folin–Ciocalteu and gallic acid was determined with the standard curve and obtained results of total phenol of IC₅₀ = 0.072 ±0.027 value was clearly evident.