Peel essential oil of bergamot （Citrus bergamia Risso） growing in Tunisia was separated by hydrodistillation and obtained in a yield of 9.7%. The oil composition was investigated using GC and GC-MS with two columns ...Peel essential oil of bergamot （Citrus bergamia Risso） growing in Tunisia was separated by hydrodistillation and obtained in a yield of 9.7%. The oil composition was investigated using GC and GC-MS with two columns HP-I and HP-Innowax. Fifteen compounds accounting for 98.52% of the oil were identified. The oil was characterized by bigb content oflimonene （59.21%）, linalool （9.51%） and linalyl acetate （16.83%）.展开更多
Gas chromatography/mass spectrometry (GC MS) of the essential oil from the aerial parts of Rabdosia lophanthoides resulted in the identification of 108 compounds representing 78.120% of the oil. Hydro distillati...Gas chromatography/mass spectrometry (GC MS) of the essential oil from the aerial parts of Rabdosia lophanthoides resulted in the identification of 108 compounds representing 78.120% of the oil. Hydro distillation of Rabdosia lophanthoides yielded a pale yellow oil. The compounds identified and their relative proportions are listed in Table 1 according to their order of elution on an HP 5MS capillary column. .展开更多
Chemical investigation on leaves oil of Hoslundia opposita, aromatic plant used in traditional medicine, harvested from 20 localities of C?te d’Ivoire was realized by GC and GC/MS. In total, 101 compounds were identi...Chemical investigation on leaves oil of Hoslundia opposita, aromatic plant used in traditional medicine, harvested from 20 localities of C?te d’Ivoire was realized by GC and GC/MS. In total, 101 compounds were identified accounting to 92% - 99%, aromatic compounds such benzyl benzoate and sesquiterpenes namely germacrene D, β-caryophyllene and α-humulene hydroxyl were found as the major constituents. As regard, the chemical profiles of our samples, it was found a great chemical variability suggesting a high polymorphism degree. In order to study this chemical variability, the results were submitted to the principal components and cluster analysis which allowed distinguishing two main groups of essential oils with respect to sampling site. The cluster I was dominated by benzyl benzoate (15%) and thymol (7.4%) comprising 6 localities, cluster II was characterized by phytol (8.5%) and α-humulene (7%) and constituted by 14 localities.展开更多
Medicinal plant are grown and produced in different ecosystems and sites under the influence of different potential factors,including the altitude as one of the vital determinants in the quantity and quality of the pl...Medicinal plant are grown and produced in different ecosystems and sites under the influence of different potential factors,including the altitude as one of the vital determinants in the quantity and quality of the plants.One of the species that grows in the highlands is Tanacetum polycephalum,an aromatic perennial of the Asteraceae.This species is characterized to be antiseptic,analgesic,anesthetic,disinfective,expectorant,anti-cancer,anti-allergic,and conducive to low blood pressure.The purpose of this study is to investigate the essential compositions in the aerial parts of T.polycephalum at the time of flowering,and in three different altitudes of the Baladeh region of Nour.Thus,the essential oil was extracted from the aerial parts in the flowering stage of the plant at three altitudes of 1 600,2 400 and 3 200 m using a water distillation method,and the essential oil compositions were identified using GC and GC/MS instruments.One-way ANOVA method was conducted to analyze the obtained data using SPSS,and a Duncan test was administered to compare the means.The results indicated that the essential output obtained from the altitudes of 1 600,2 400 and 3 200 m was(0.74±0.01)%,(1.09±0.02)%,and(1.32±1.2)%,respectively,so that the altitude of 3 200 m revealed the greatest quantity,and the altitude of 1 600 m represented the smallest quantity.Moreover,the essential oil compositions showed the highest percentage in the altitude of 3 200 m and the lowest percentage at the altitude of 1 600 m.The results showed that as the altitude increases,the essential oil compositions revealed the greater quantity and percentage in the aerial parts of T.polycephalum.展开更多
文摘Peel essential oil of bergamot （Citrus bergamia Risso） growing in Tunisia was separated by hydrodistillation and obtained in a yield of 9.7%. The oil composition was investigated using GC and GC-MS with two columns HP-I and HP-Innowax. Fifteen compounds accounting for 98.52% of the oil were identified. The oil was characterized by bigb content oflimonene （59.21%）, linalool （9.51%） and linalyl acetate （16.83%）.
文摘Gas chromatography/mass spectrometry (GC MS) of the essential oil from the aerial parts of Rabdosia lophanthoides resulted in the identification of 108 compounds representing 78.120% of the oil. Hydro distillation of Rabdosia lophanthoides yielded a pale yellow oil. The compounds identified and their relative proportions are listed in Table 1 according to their order of elution on an HP 5MS capillary column. .
文摘Chemical investigation on leaves oil of Hoslundia opposita, aromatic plant used in traditional medicine, harvested from 20 localities of C?te d’Ivoire was realized by GC and GC/MS. In total, 101 compounds were identified accounting to 92% - 99%, aromatic compounds such benzyl benzoate and sesquiterpenes namely germacrene D, β-caryophyllene and α-humulene hydroxyl were found as the major constituents. As regard, the chemical profiles of our samples, it was found a great chemical variability suggesting a high polymorphism degree. In order to study this chemical variability, the results were submitted to the principal components and cluster analysis which allowed distinguishing two main groups of essential oils with respect to sampling site. The cluster I was dominated by benzyl benzoate (15%) and thymol (7.4%) comprising 6 localities, cluster II was characterized by phytol (8.5%) and α-humulene (7%) and constituted by 14 localities.
基金supported by the research fund from the Research Deputy section
文摘Medicinal plant are grown and produced in different ecosystems and sites under the influence of different potential factors,including the altitude as one of the vital determinants in the quantity and quality of the plants.One of the species that grows in the highlands is Tanacetum polycephalum,an aromatic perennial of the Asteraceae.This species is characterized to be antiseptic,analgesic,anesthetic,disinfective,expectorant,anti-cancer,anti-allergic,and conducive to low blood pressure.The purpose of this study is to investigate the essential compositions in the aerial parts of T.polycephalum at the time of flowering,and in three different altitudes of the Baladeh region of Nour.Thus,the essential oil was extracted from the aerial parts in the flowering stage of the plant at three altitudes of 1 600,2 400 and 3 200 m using a water distillation method,and the essential oil compositions were identified using GC and GC/MS instruments.One-way ANOVA method was conducted to analyze the obtained data using SPSS,and a Duncan test was administered to compare the means.The results indicated that the essential output obtained from the altitudes of 1 600,2 400 and 3 200 m was(0.74±0.01)%,(1.09±0.02)%,and(1.32±1.2)%,respectively,so that the altitude of 3 200 m revealed the greatest quantity,and the altitude of 1 600 m represented the smallest quantity.Moreover,the essential oil compositions showed the highest percentage in the altitude of 3 200 m and the lowest percentage at the altitude of 1 600 m.The results showed that as the altitude increases,the essential oil compositions revealed the greater quantity and percentage in the aerial parts of T.polycephalum.
