The volatile oil from the leaves of E. urograndis was analyzed by GC and GC-MS. It was identified 10 compounds in which, orto-cimene (41.4%) and 1,8-cineol (25.8%) were the main constituents. The induction of deleterious effect to aquatic organisms due to the presence of volatile oil lixiviated from E. urograndis leaves was studied using Daphnia laevis and D. similis as bioindicators. Through the results of toxicological tests it was possible to show that the litterbag of E. urograndis represents a risk factor for the aquatic ecosystem of lakes and rivers that are in the surrounding area of large scale Eucalyptus plantations. The method can be used for monitor the quality of these types of aquatic environments.

O acoplamento oxidativo entre a 2-metoxi-1,4-benzoquinona e metoxiarenos em ácido acético resulta na formação de metoxiaril-1,4-benzoquinonas. Esta reação é efetivamente catalisada pelo sistema redox Pd(OAc)2/heteropoliácido (H9PMo6V6O40 ) e envolve dioxigênio como oxidante final.

Oxidative coupling of 2-methoxy-1,4-benzoquinone and arenes in acetic acid gives methoxyaryl-substituted 1,4-benzoquinones. The reaction is effectively catalyzed by a Pd(OAc)2/heteropoly acid (H9PMo6V6O40 ) redox system with dioxygen as the final oxidant.

A composição química do óleo essencial das folhas e flores de dois acessos de Ocimum selloi Benth., cultivados na Universidade Federal de Viçosa foi analisada. Para o acesso A o componente principal foi identificado como estragol, o qual representa 94,95% e 92,54% do óleo das folhas e das flores, respectivamente. O óleo obtido das folhas e flores do acesso B é constituído de 65,49% e 66,18% de metil eugenol, respectivamente. Para ambos os acessos, diversos constituintes químicos, presentes em quantidades menores, foram identificados. As diferenças fenotípicas e químicas observadas entre os dois acessos estudados indicam a existência de duas variedades quimicamente distintas de Ocimum selloi Benth.

Chemical composition analysis of the essential oil from the leaves and flowers of two accessions of Ocimum selloi Benth, cultivated at the Federal University of Viçosa was carried out. For accession A the major component was identified as estragole and represented 94,95% and 92,54% of the oil from the leaves and flowers respectively. For accession B, the oil from the leaves and flowers was constituted by 65,49% and 66,18% of methyleugenol, respectively. For both accessions several minor constituents were also identified. The phenotypic and chemical differences observed between these two accessions suggest the existence of two chemicaly distinct varieties for Ocimum selloi Benth.