Comparative study of chemistry compositions and antimicrobial potentials of essential oils and oleoresins from dried and fresh Mentha longifolia L.

Chemical composition, antibacterial and antifungal activities of Saudi Arabian Mentha longifolia L. essential oil

“…On the other hand, Yanmis et al [30] identified menthone as a minor constituent, with 1.17% and 7.9% contribution, respectively. Finally, in most other studies reviewed as a part of this work, menthone quantities were negligible [25,[31][32][33][34][35]. As can be seen from the above, the findings yielded by the present study do not support those reported by other authors.…”

“…In a study conducted in Iran, Ghasemi et al [33] identified isopulegone (31.78%), eucalyptol (15.99%), menthofuran (11.25%), cis-isopulegone (10.5%), and p-menth-3-en-8-ol (6.85%) as the major constituents of M. longifolia essential oil. On the other hand, Singh et al [25] reported that M. longifolia contained 94.0% and 98.1% of the fresh and dry mint essential oil, respectively. Hussain et al [34] examined differences in the wild growing M. longifolia constituents during the summer and winter season, reporting that piperitenone oxide comprised 79.9% and 88.5% of fresh and dry mint essential oil, respectively.…”

“…Aerial parts were thus separated from the remaining plant material and were washed to remove soil particles, before being left to dry in shade at room temperature, after which they were ground by the grinder (IKA Werke MF 10 basic). Following the procedure described by Singh et al [25], the ground material (100 g of substance dissolved in 400 mL of doubledistilled water in round-bottom flask of 1 000 mL volume) was hydrodistillation for 3 h using Clevenger apparatus (Klaus Hofmann GmbH, Germany). Moisture was removed from the extracted oil using anhydrous sodium sulfate and the resultant oil was stored at 4 °C until required for further analysis.…”

Effect of drying on the yield and chemical composition of essential oils obtained from Mentha Longifolia leaves

“…Twenty-three components were identified in FMEO and DMEO given in Table 1. 8 representing about 94.0% and 98.4%, respectively, of the total amount. Piperitenone oxide with percentages of 79.9 in FMEO and 88.5 in DMEO is the major component followed by small fractions of piperitenone, terpinen-4-ol, lippiaphenol and caryophyllene oxide.…”