Objective: To evaluate the essential oil composition and the antibacterial activity of an Algerian endemic plant, Launaea lanifera Pau(L. lanifera), grown in arid steppe regions.Methods: L. lanifera essential oil was ...Objective: To evaluate the essential oil composition and the antibacterial activity of an Algerian endemic plant, Launaea lanifera Pau(L. lanifera), grown in arid steppe regions.Methods: L. lanifera essential oil was isolated from aerial parts by steam distillation and its chemical composition was evaluated by gas chromatographyflame ionization detector and gas chromatography with electron impact mass spectrometry. Furthermore, its in vitro antibacterial activity against four bacterial strains was tested following the agar disk diffusion method.Results: This species had a very low essential oil yield(0.005%). Twenty-four(92.6%)individual components were identified. The main constituents were hexahydrofarnesyl acetone(31.6%),(E)-b-ionone(8.5%),(E)-b-damascenone(7.0%), 2-methyltetradecane(3.8%), n-heptadecane(3.8%), limonene(2.8%) and b-caryophyllene(2.8%). No noteworthy antimicrobial activity was observed on the tested bacteria, neither Gram negative nor Gram positive.Conclusions: This is the first report on the volatile constituents and antibacterial activity of L. lanifera. The studied essential oil does not possess significant activity against the tested microorganisms.展开更多
KáLIDA SANT PAU中心是一个为癌症患者及其家人、朋友提供情感交流和社交的场所。作为对传统医疗的补充,它如同一个家,向人们敞开着怀抱。在这里,患者可以得到专业医疗人士的帮助。该疗养中心位于西班牙巴塞罗那,坐落在一个新建医...KáLIDA SANT PAU中心是一个为癌症患者及其家人、朋友提供情感交流和社交的场所。作为对传统医疗的补充,它如同一个家,向人们敞开着怀抱。在这里,患者可以得到专业医疗人士的帮助。该疗养中心位于西班牙巴塞罗那,坐落在一个新建医院和原有的新艺术风格建筑群之间,项目内包括一栋400 m^2的小型建筑和宽敞的室外花园,主要立面与区域内新规划的道路平行。建筑师的基本理念是想打造一处种植有五彩斑斓花朵的花园,因此疗养中心被设计为一个带有花园凉棚的场所,模糊了内外空间的界限。疗养中心为使用者提供了光线充足、温馨惬意、保护患者私密的庇护之地。展开更多
基金Supported by the National Fund for Scientific Research,CNEPRU projects,Ministry of Higher Education and Scientific Research,Algeria
文摘Objective: To evaluate the essential oil composition and the antibacterial activity of an Algerian endemic plant, Launaea lanifera Pau(L. lanifera), grown in arid steppe regions.Methods: L. lanifera essential oil was isolated from aerial parts by steam distillation and its chemical composition was evaluated by gas chromatographyflame ionization detector and gas chromatography with electron impact mass spectrometry. Furthermore, its in vitro antibacterial activity against four bacterial strains was tested following the agar disk diffusion method.Results: This species had a very low essential oil yield(0.005%). Twenty-four(92.6%)individual components were identified. The main constituents were hexahydrofarnesyl acetone(31.6%),(E)-b-ionone(8.5%),(E)-b-damascenone(7.0%), 2-methyltetradecane(3.8%), n-heptadecane(3.8%), limonene(2.8%) and b-caryophyllene(2.8%). No noteworthy antimicrobial activity was observed on the tested bacteria, neither Gram negative nor Gram positive.Conclusions: This is the first report on the volatile constituents and antibacterial activity of L. lanifera. The studied essential oil does not possess significant activity against the tested microorganisms.
文摘KáLIDA SANT PAU中心是一个为癌症患者及其家人、朋友提供情感交流和社交的场所。作为对传统医疗的补充,它如同一个家,向人们敞开着怀抱。在这里,患者可以得到专业医疗人士的帮助。该疗养中心位于西班牙巴塞罗那,坐落在一个新建医院和原有的新艺术风格建筑群之间,项目内包括一栋400 m^2的小型建筑和宽敞的室外花园,主要立面与区域内新规划的道路平行。建筑师的基本理念是想打造一处种植有五彩斑斓花朵的花园,因此疗养中心被设计为一个带有花园凉棚的场所,模糊了内外空间的界限。疗养中心为使用者提供了光线充足、温馨惬意、保护患者私密的庇护之地。
