In vitro antioxidant and antibacterial activities of essentials oils obtained from Egyptian aromatic plants

In vitro antioxidant and antibacterial properties and total phenolic contents of essential oils from Thymus vulgaris, T. kotschyanus, Ziziphora tenuior and Z. clinopodioides

“…The EOs of T. vulgaris and Z. clinopodioides showed the highest radical scavenging activities (P > 0.05) with no statistical differences between them while the EO of Z. tenuior had the lowest activity (P < 0.05). Viuda-Martose et al reported radical scavenging activity of 36.71% and 64.29 % for T. vulgaris EO at concentrations of 5 and 10 mg/ml, respectively [6]. In the case of T. Kotschyanus EO, Amiri reported higher radical scavenging activity [24].…”

“…Ferric chloride, potassium ferricyanide (K 3 Fe(CN) 6 ), gallic acid, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,6,-ditert-butyl-4-methylphenol (butylated hydroxytoluene, BHT) were obtained from Sigma-Aldrich Chemie (Steinheim, Germany).…”

“…The researchers focused on finding and using natural preservatives in foods, due to toxic and carcinogenic effects of chemical preservatives [3]. A considerable amount of literature has been published on antioxidant and antimicrobial activities of Essential oils (EOs) from various aromatic plants [4][5][6]. The EOs and extracts of many aromatic plants and spices can be used as natural food preservative.…”

Scutia buxifolia Reissek essential oil: in vitro antioxidant and antimicrobial activities

“…The efficiency of the essential oil of S. buxifolia and ascorbic acid standard were evaluated for this method, and presented IC 50 values of 15.03 ± 0.11 and 15.98 ± 1.30 μg/mL, respectively; compared to Thymbra capitatus (IC 50 = 19.27 μg/ mL), Pistacia atlantica (IC 50 = 18.95 μg/mL), Stevia rebaudiana (IC 50 = 19.26 μg/mL), Acacia Senegal (IC 50 = 17.89 μg/mL), Mycobacterium peregrinum (IC 50 = 13.48 μg/mL) and Mitracarpus frigidus (IC 50 = 38.00 μg/mL) (Bounatirou et al 2007, Gourine et al 2010, Muanda et al 2011, Fabri et al 2012), these results proved that the essential oils from S. buxifolia stem bark possess significant antioxidant properties. The antioxidant activity of essential oils has often been attributed to the presence of phenolic constituents, especially spathulenol, carvacrol and thymol (Bounatirou et al 2007, Hazzit et al 2009, Muanda et al 2011, Viuda-Martos et al 2011. This association was confirmed in our study, but other compounds also seem to play an important role such as eugenol (IC 50 = 1.26 μg/mL by DPPH method), β-cubebene (IC 50 = 19.3 μg/mL) and butylated hydroxytoluene (BHT) (Yanishlieva et al 1999, Gülçin et al 2004, Jirovetz et al 2006, Lin et al 2007); these compounds are also present in the essential oil of S. buxifolia, and may account, in part, for the good antioxidant potential reported here.…”

“…Thymol has been shown to cause disruption of the cellular membrane, inhibition of ATPase activity, and release of intracellular ATP and other constituents (Raybaudi-Massilia et al 2006, Viuda-Martos et al 2011). The spathulenol, major compound described in the essential oil of S. buxifolia stem bark (35.87%), evidenced a high activity against fungi strains dermatophytes such as Trichophyton mentagrophytes and Microsporum gypseum with MIC values ranging from 32 to 64 μg/ml.…”