Hydrodistilled volatile oil from the aerial parts of Eremostachys laciniata (L.) (Labiatae) was obtained at yield of 0.9% w/w, based on dry weight. The oil was analysed by a combination of GC and GC-MS. Nineteen compounds were identified, representing approximately 91.2% of the total oil. The main constituents of the essential oil were dodecanol (72.5%), widdrol (2.4%), germacrene B (1.9%), thujopsene (1.9%) and linalool (1.7%).
The essential oil was isolated by steam distillation from the aerial parts of Cleome iberica DC. at a yield of 0.1% w/w, based on dry weight. The oil was analysed by a combination of GC and GC-MS; 26 components were identified, constituting 99.8% of the oil. The main constituents of the essential oil were carotol (21.8%), germacrene D (15.8%), β β β β β-cubebene (15.5%), trans-nerolidol (5.6%), δ δ δ δ δ-cadinene (4.5%) and hexyl acetate (4.0%).
Stachys pilifera is an endemic plant to Iran. The main purpose of this study was to investigate the impacts of some habitat characteristics on the distribution of S. pilifera using the BMLR model in Kohgiluyeh and Boyer-Ahmad Province, Iran. Tow transects were randomly established in each region. 10 quadrats sized 1 x 1 m 2 were established along the transect. In each plot, canopy cover (%) of S. pilifera was recorded. 25 soil samples were gathered in the region to evaluate soil characteristics. The associated pixel of each plot was extracted and added to a prepared spreadsheet of a field database. The data gathered from experiments were fed into the computer item by item according to their own values. To determine the effect of environmental factors on the distribution of S. pilifera species, the researchers run a set of backward multiple linear regressions. The results of MLR to investigate the significance of was not significant (P-Value >0.05). Then the most insignificant term in the first run (silt) is removed and the operation run again. After removing silt, the results of the BMLR model are seen by considering the effect of other factors, and some of terms are insignificant again. The process is continued step by step to the point that there are only significant terms. Results showed that the effects of rain, sand, P, Fe, Zn, Mn, and evaporation on the distribution of S. pilifera species were significant. Rain, P, and Fe have positive effects (positive coefficient), while sand, Zn, Mn, and evaporation have negative effects (negative coefficient). *
The oil constituents from rhizomes, leaves and seed of Peucedanum petiolare (DC.) Boiss., gathered in Touchal on mountain Alborz (Tehran province) in Iran, have been studied by GC and GC/MS. The major constituents in the rhizome oil were found to be b-bisabolene (31.3%), (E)-sesquilavandulol (20.5%), geranyl acetate (5.7%), citronellyl acetate (5.2%) and sabinene (5.2%). In the leaf oil the main components found were sabinene (42.3%), a-pinene (42.6%) and limonene (2.6%). In the seed α α α α α-pinene (47.3%) and sabinene (45.9%) were the predominant constituents. Copyright
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