RESUMO
The volatile compounds of Syzygium paniculatum Banks ex Gaertn. fruit were isolated by simultaneous distillation-solvent extraction and analyzed by gas chromatography-flame ionization detectection and gas chromatography-mass spectrometry. A total of 155 volatile constituents were identified, accounting for 24.5 mg/kg of the fruit composition. Major compounds were alpha-pinene (32.8% of the total composition), (Z)-beta-ocimene (21.8%), limonene (6.9%), and alpha-terpineol (5.1%), indicating that the volatile composition of the fruit is more rich in terpenes.
Assuntos
Syzygium/química , Compostos Orgânicos Voláteis/isolamento & purificação , Frutas/química , Cromatografia Gasosa-Espectrometria de Massas , Compostos Orgânicos Voláteis/químicaRESUMO
The chemical composition of the volatile compounds from the leaves of Lantana canescens Kunth (Verbenaceae) and L. lopez-palacii Moldenke grown in Colombia were analyzed by GC and GC/MS. One hundred and thirty-nine volatile compounds were identified in L. canescens, of which the major ones were beta-caryophyllene (13.5%), germacrene D (10.3%) and 1-octen-3-ol (8.4%). In the oil obtained from L. lopez-palacii, eighty-three compounds were identified, of which the most prominent were 1-octen-3-ol (24.4%) and beta-caryophyllene (15.2%). The in vitro antibacterial activity of the L. lopez-palacii essential oil was studied against three bacterial strains using the disc diffusion method. No antimicrobial activity was found against Escherichia coli, Enterobacter sakazakii and Listeria monocytogenes.
Assuntos
Lantana/química , Óleos Voláteis/análise , Bactérias/efeitos dos fármacos , Colômbia , Cromatografia Gasosa-Espectrometria de Massas , Óleos Voláteis/farmacologia , Folhas de Planta/químicaRESUMO
The essential oil from fruits of Retrophyllum rospigliosii (Pilger) C.N. Page grown in Colombia was analyzed by GC and GC/MS. Ninety-one compounds were identified, of which the most prominent were limonene (37.7%) and alpha-pinene (16.3%). The in vitro antibacterial activity of the essential oil was studied against seven bacterial strains using the disc diffusion method. The strongest activity of the oil was against the Gram-positive bacterium Bacillus cereus.
Assuntos
Antibacterianos/química , Antibacterianos/farmacologia , Frutas/química , Óleos Voláteis/química , Óleos Voláteis/farmacologia , Traqueófitas/química , Bactérias/efeitos dos fármacos , Colômbia , Cromatografia Gasosa-Espectrometria de Massas , Testes de Sensibilidade MicrobianaRESUMO
The chemical composition of the volatile compounds from the leaves of Lippia dulcis Trev. (Verbenaceae) from Colombia was studied by GC and GC/MS. Forty volatile compounds were identified, of which the major ones were alpha-copaene (18.0%), beta-caryophyllene (17.8%), and delta-cadinene (14.7%). The sweet bisabolane sesquiterpenoid, hernandulcin, formed only 1.1% of the leaf oil.
Assuntos
Lippia/química , Óleos Voláteis/análise , Óleos de Plantas/análise , Plantas Medicinais/química , Terpenos/isolamento & purificação , Colômbia , Cromatografia Gasosa-Espectrometria de Massas , Folhas de Planta/química , Terpenos/químicaRESUMO
The chemical composition of the volatile compounds from the leaves of Galinsoga parviflora Cav. (Asteraceae) from Colombia was studied by GC and GC/MS. Eighty-eight volatile compounds were identified, of which the major ones were (Z)-3-hexen-1-ol (21.7%), beta-caryophyllene (12.4%), and 6-demethoxy-ageratochrome (14%). The leaf oil presented antimicrobial activities against the Gram-positive bacteria Staphylococcus aureus and Bacillus cereus.
