چكيده فارسي :
Microwave assisted hydrodistillation (MAHD) and hydrodistillation (HD) techniques have applied to extract essential oils from aerial parts of aromatic herb of Prangosacaulis from west of Iran [1]. It is a highly advanced and homogeneous family, largely used in food preparation, perfumery and medicine. We make appropriate comparisons in term of extraction yields and rates, essential oil composition, and energy consumption. The microwave method offers important advantages over traditional alternatives, shorter isolation times, environmental impact and cleaner features as no residue generation and no water or organic solvent used.
Chemical characterizations of volatile components were investigated by GC/MS. Seventeen components were characterized [2]. The major components of the oils extracted usining HD and MAHD were myrcene (7.60,5.40%) β-pinene (7.85,7.92%) and α – terpinene (5.32, 13.26%) respectively.
The methanolic extract of Prangos acaulis also was examined for free radical scavenging activity. Anti-oxidant activity was examined using 2,2-diphenyl-1-picrylhydrazy l (DPPH) assay [3]. The result indicated the free radical scavenging activity of MeOH extract (M) (IC50=65.7±.0.6 μg/ml) and phenol content of sample (Gallic acid equivalent=129.2±1.1 mg/l).
