%0 Journal Article
%T Screening of the odour-activity and bioactivity of the essential oils of leaves and flowers of Hyptis Passerina Mart. from the Brazilian Cerrado
%A Zellner
%A Barbara D.
%A Amorim
%A Ana Carolina L.
%A Miranda
%A Ana Luisa P. de
%A Alves
%A Ruy J. V.
%A Barbosa
%A Jussara P.
%A Costa
%A Gisela L. da
%A Rezende
%A Claudia M.
%J Journal of the Brazilian Chemical Society
%D 2009
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50532009000200018
%X the chemical profile of the essential oils obtained from the leaves and flowers of hyptis passerina mart., a rare species of the brazilian cerrado, has been determined for the first time. analyses by gc-ms showed sesquiterpenes as major compounds. ¦Â-epi-acorenol (35.7% and 32.8%, respectively from leaf and flower essential oils), was isolated and identified by 1d and 2d nmr. the flower-derived oil presented a higher concentration of hydrocarbon and oxygenated monoterpenes, while the leaf-oil was richer in diterpenes. the global odour impressions of both oils were given by direct analysis and gc-ms-o and were characterized as herbaceous with tea notes, and green, cooked and woody impressions for leaf-oil; herbaceous, with spicy, woody and minty notes for flower-oil. ¦Â-epi-acorenol, spathulenol, ¦Â-caryophyllene, and caryophyllene oxide were relevant for the odour-activity of both oils, as well as minor constituents, such as linalool. the antimicrobial activity was investigated by means of agar diffusion disc method and contact bioautography, against gram-positive and negative bacteria and yeast. both oils presented to be bioactive against the tested microorganisms with significant inhibition level.
%K hyptis passerina mart.
%K leaf and flower derived essential oil
%K terpenes
%K odour-active compounds
%K antimicrobial activity.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532009000200018&lng=en&nrm=iso&tlng=en