The aim of this study was to investigate the chemical composition of the essential oils of “Covid-Organics” of Madagascar (62% Artemisia annua and two other undisclosed medicinal plants) used as curative and prevent...The aim of this study was to investigate the chemical composition of the essential oils of “Covid-Organics” of Madagascar (62% Artemisia annua and two other undisclosed medicinal plants) used as curative and preventive treatments of Covid-19, to identify its constituent species. The essential oils isolated by hydro-distillation from two samples (curative and preventive) were analyzed by GC-FID and GC-MS. These essential oils (curative and preventive) were mainly dominated by camphor (17.9% and 11.9%, respectively), spathulenol (4.8% and 11.8%, respectively), α-acorenol (4.3% and 3.7%, respectively), (E)-β-caryophyllene (3.4% and 4.2%, respectively), 1,8-cineole (3.1% and 3.6%, respectively), hexadecanoïc acid (3.8% and 3.2%, respectively) and caryophyllene oxide (3.4% and 2.4%, respectively). From the chemical composition, two species were identified, A. annua characterised by camphor and Cinnamomumcamphora (Ravintsara) characterised by 1,8-cineole and sabinene. However, we were unable to identify the third species.展开更多
Objective:To investigate the chemical composition,antioxidant and antimicrobial activities of essential oil of Santolina chamaecyparissus L.cultivated in Algeria.Methods:The chemical composition of hydrodistilled esse...Objective:To investigate the chemical composition,antioxidant and antimicrobial activities of essential oil of Santolina chamaecyparissus L.cultivated in Algeria.Methods:The chemical composition of hydrodistilled essential oil from flowering aerial parts has been analyzed by gas chromatograph and gas chromatograph-mass spectrometer techniques.The antioxidant activities conducted by 2,2-diphenyl-1-picrylhydrazyl scavenging test andβ-carotene bleaching test.The antimicrobial activity was realised by agar disc diffusion method and cornell medical index was determined by agar dilution method in solid medium.Results:About 36 components accounting more than 82%of the total oil were identified.Oxygenated monoterpenes was the main fraction(54.66%)and was represented by artemisia ketone(40.33%)as major component of this oil.The other major constituents were(Z)-thujone(9.82%),(2Z,6E)-farnesol(7.30%)and limonene(6.87%)and concerning antiradical scavenging test(2,2-diphenyl-1-picrylhydrazyl)had demonstrated a weak activity obtained with an EC_(50) of(43.01±8.04)and moderate activity for β-carotene bleaching test(47.00±3.13)at 120 min.In the other hand,this oil was found effective against all tested strains except Pseudomonas aeruginosa and Aspergillus species.This activity was ranging from 10 mm to 24 mm with the lowest minimum inhibitory concentration value between under 0.070μg/mL to upper 9μg/mL.Conclusions:The results provided evidence that the studied plant might indeed be potential sources of natural antioxidant and antimicrobial agents.展开更多
文摘The aim of this study was to investigate the chemical composition of the essential oils of “Covid-Organics” of Madagascar (62% Artemisia annua and two other undisclosed medicinal plants) used as curative and preventive treatments of Covid-19, to identify its constituent species. The essential oils isolated by hydro-distillation from two samples (curative and preventive) were analyzed by GC-FID and GC-MS. These essential oils (curative and preventive) were mainly dominated by camphor (17.9% and 11.9%, respectively), spathulenol (4.8% and 11.8%, respectively), α-acorenol (4.3% and 3.7%, respectively), (E)-β-caryophyllene (3.4% and 4.2%, respectively), 1,8-cineole (3.1% and 3.6%, respectively), hexadecanoïc acid (3.8% and 3.2%, respectively) and caryophyllene oxide (3.4% and 2.4%, respectively). From the chemical composition, two species were identified, A. annua characterised by camphor and Cinnamomumcamphora (Ravintsara) characterised by 1,8-cineole and sabinene. However, we were unable to identify the third species.
文摘Objective:To investigate the chemical composition,antioxidant and antimicrobial activities of essential oil of Santolina chamaecyparissus L.cultivated in Algeria.Methods:The chemical composition of hydrodistilled essential oil from flowering aerial parts has been analyzed by gas chromatograph and gas chromatograph-mass spectrometer techniques.The antioxidant activities conducted by 2,2-diphenyl-1-picrylhydrazyl scavenging test andβ-carotene bleaching test.The antimicrobial activity was realised by agar disc diffusion method and cornell medical index was determined by agar dilution method in solid medium.Results:About 36 components accounting more than 82%of the total oil were identified.Oxygenated monoterpenes was the main fraction(54.66%)and was represented by artemisia ketone(40.33%)as major component of this oil.The other major constituents were(Z)-thujone(9.82%),(2Z,6E)-farnesol(7.30%)and limonene(6.87%)and concerning antiradical scavenging test(2,2-diphenyl-1-picrylhydrazyl)had demonstrated a weak activity obtained with an EC_(50) of(43.01±8.04)and moderate activity for β-carotene bleaching test(47.00±3.13)at 120 min.In the other hand,this oil was found effective against all tested strains except Pseudomonas aeruginosa and Aspergillus species.This activity was ranging from 10 mm to 24 mm with the lowest minimum inhibitory concentration value between under 0.070μg/mL to upper 9μg/mL.Conclusions:The results provided evidence that the studied plant might indeed be potential sources of natural antioxidant and antimicrobial agents.
