The chemical composition of the essential oil and hydrolates of Campomanesia viatoris Landrum were investigated by gas chromatography/mass spectrometry (GC/MS) and a GC flame ionization detector (GC-FID). The major constituents were tasmanone (70.50, essential oil; 74.73%, hydrolate), flavesone (12.77, essential oil; 12.24%, hydrolate) and agglomerone (6.79, essential oil; 10.84%, hydrolate). Tasmonone was isolated and its structure was characterized by spectrometric analysis, specifically 1D and 2D nuclear magnetic resonance (NMR) and mass spectrometry (MS). These findings supports the quimiotaxonomic relationship with Campomanesia and Eucalyptus genera.

Objetivou-se neste estudo caracterizar quimicamente e avaliar as atividades antioxidante e antibacteriana dos óleos essenciais de citronela (Cymbopogon nardus), canela (Cinnamomum zeylanicum) e gengibre (Zingiber officinale). A obtenção do óleo essencial foi realizada utilizando a técnica de hidrodestilação por meio do aparelho de Clevenger modificado e a identificação e quantificação dos constituintes pelas análises em CG/EM e CG-DIC. A avaliação da atividade antibacteriana foi realizada por meio da técnica difusão cavidade em ágar, utilizando os microrganismos Staphylococcus aureus ATCC 6538, Listeria monocytogenes ATCC 19117, Escherichia coli ATCC 11229, Salmonella Cholerasuis ATCC 6539 e Pseudomonas aeruginosa ATCC 15442. A atividade antioxidante foi avaliada utilizando sistema β-caroteno/ácido linoléico e o método de seqüestro de radicais DPPH. Nas análises cromatográficas, os constituintes majoritários encontrados no óleo essencial de C. nardus foram citronelal (47,12%), geraniol (18,56%) e citronelol (11,07%), no óleo essencial de C. zeylanicum foram identificados (E)- cinamaldeído (77,72%), acetato de (E)-cinamila (5,99%) e o monoterpenóide 1,8-cineol (4,66%) e, para Z. officinale os majoritários foram geranial (25,06%), neral (16,47%), 1,8-cineol (10,98%), geraniol (8,51%), acetato de geranila (4,19%) e o canfeno (4,30%). Os óleos essenciais apresentaram atividade antibacteriana tanto para bactérias Gram-negativas como para bactérias Gram-positivas, sendo que o óleo essencial de C. zeylanicum foi o mais eficiente. A atividade antioxidante foi evidenciada pelo teste β-caroteno/ácido linoléico, respectivamente, para C. nardus, seguido de Z. officinale e C. zeylanicum, e pelo teste do DPPH foi observada apenas para C. nardus.

The aims of this study were to chemically characterize and to evaluate the antioxidant and antibacterial activities of the citronella (Cymbopogon nardus), cinnamon (Cinnamomum zeylanicum) and ginger (Zingiber officinale) essential oils. The essential oil extraction was performed by the using of hydrodistillation through the modified Clevenger apparatus, and identification and quantification of the constituents by the GC/MS and GC-FID analysis. Evaluation of antibacterial activity was performed by using agar well diffusion method, with Staphylococcus aureus ATCC 6538, Listeria monocytogenes ATCC 19117, Escherichia coli ATCC 11229, Salmonella Cholerasuis ATCC 6539 and Pseudomonas aeruginosa ATCC 15442. The antioxidant activity was evaluated by using β-carotene/linoleic acid system and the radical scavenging DPPH method. In chromatographic analysis the major constituents of C. nardus essential oil were citronellal (47.12%), geraniol (18.56%) and citronellol (11.07%), in the C. zeylanicum essential oil were identified (E)-cinnamaldehyde (77.72%), acetate (E)-cinnamyl (5.99%) and the monoterpenoid 1,8-cineole (4.66%) as major components, and in Z. officinale the majority were geranial (25.06%), neral (16.47%), 1,8-cineole (10.98%), geraniol (8.51%), geranyl acetate (4.19%) and camphene (4.30%). The essential oils showed antibacterial activity for both Gram-negative and Gram-positive microorganisms, and the most efficient was C. zeylanicum essential oil. The antioxidant activity was observed, when using β-carotene/ linoleic acid system, for C. nardus, followed by Z. officinale and C. zeylanicum and, when using DPPH test, activity was observed only for C. nardus.