K. Jaimand; M.H. Assareh; M. Mirza; M. Nadery; Sh. Karimi; E. Parsa
Abstract
Eucalyptuses trees as the fast-growing forest species are native to the Pacific. This species were introduced to Iran more than 100 years ago and cultivated in the south, having perfect environment for them. This research was aimed to investigate seasonal fluctuations of essential oil and1,8-cineol content ...
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Eucalyptuses trees as the fast-growing forest species are native to the Pacific. This species were introduced to Iran more than 100 years ago and cultivated in the south, having perfect environment for them. This research was aimed to investigate seasonal fluctuations of essential oil and1,8-cineol content in Eucalyptus species of Fars province. The leaves of 14 Eucalyptus species were collected from Fars province in the middle of each season for two years (2007 & 2008). Afterward, essential oils were obtained by hydrodistillation method and compounds were identified by GC and GC/MS. Results showed that in each region, some of the species had the highest essential oil yield and quality; therefore due to the high essential oil content and 1,8-cineol, they could be recommended for large-scale cultivation in the region in order to extract essential oil. Studied Eucalyptus included: E. calcicultrix (Miq.) Blakely; E. camaldulensis var. camaldulensis Dehnh.; E. cornuta; E. fruticetorum; E. intertexta R.T. Baker; E. largiflorens F. Muell.; E. lesouefii; E. longicornis F. Muell.; E. oleosa F. Muell.; E. rudis Endl.; E. salmonophloia F. Muell.; E. salubaris; E. stricklandii Maiden; E. viridis. The essential oil yield of different species at different seasons differed from 1.0 to 6.8% in 2007 and 0.3 to 5.8% in 2008. According to the results, the highest oil yield in autumn (5.2%-6.4%), the highest percentage of 1,8-cineole in winter (91.4%-94%), and the best time to harvest were recorded for E. oleosa F. Muell at Shousni, Mamasani; therefore, E. oleosa F. Muell could be recommended for cultivation as the best species.
Kh. Abbasi; F. Sefidkon; Y. Yamini
Abstract
The genus Satureja from lamiaceae family consists of many species all over the world. In Iran, there are 15 species, 9 of them are endemic. The oil of different Satureja species are very important because of having carvacrol. In this study, the effect of two extraction methods (hydro-distillation and ...
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The genus Satureja from lamiaceae family consists of many species all over the world. In Iran, there are 15 species, 9 of them are endemic. The oil of different Satureja species are very important because of having carvacrol. In this study, the effect of two extraction methods (hydro-distillation and supercritical fluid extraction) on yield and composition of the essential oils Satureja hortensis and Satureja rechingeri wasinvestigated. The aerial parts of S. hortensis were collected from Research Station of Alborz (Karaj) at full flowering stage and those of S. rechingeri were collected from their natural habitats on Ilam province. After drying the plant material, the oil of both species were obtained by hydro-distillation and also by SFE (with and without modifier). The oil were analyzed by GC and GC/MS. 17 compounds were identified in the oil of S. hortensis by hydro-distillation, with carvacrol (48.1%) and g-Terpinene (38.4%) as the main components. In the oils of SFE, 9 compounds were characterized with carvacrol (57.1%-63.4%) and g-Terpinene (27.0%-32.8%) as the major components. Therefore, the percentage of carvacrol was increased by SFE and g-Terpinene was decreased. 20 components were identified in the oil of S. rechingeri by hydro-distillation, with carvacrol (86.6%) as main constituent. In the oils of SFE, 6 compounds were identified, that the percentage of carvacrol (95.0%-95.6%) was higher.