27 research outputs found
El servicio de negociacion en CORBA
La especificacion del servicio de negociacion (trading) para la arquitectura CommonObject Request Broker (CORBA) es un documento que describe la interaction entreobjetos. En el estandar se definen las formas en que los objetos deberian anunciar yencontrar servicios en ambientes distribuidos heterogeneos. El proposito de este trabajoes presentar una description de los tipos de servicio, propiedades y comportamiento delservicio de negociacion, sin tocar aspectos de detalle tecnico
Floristic overview of the epiphytic bryophytes of terra firme forests across the Amazon basin
Riqueza e estratificação vertical de epífitas vasculares na Estação Ecológica de Jataí: área de Cerrado no Sudeste do Brasil
Vertical distribution of epiphytic bryophytes in Atlantic Forest fragments in northeastern Brazil
Diversity of bryophytes in priority areas for conservation in the Atlantic forest of northeast Brazil
Bryophyte flora in upland forests at different successional stages and in the various strata of host trees in northeastern Pará, Brazil
Horticultural chain management for countries of Asia and the Pacific region: A training package
Elevational gradients of species richness derived from local field surveys versus "mining" of archive data
Four anti-protozoal and anti-bacterial compounds from Tapirira guianensis
Tapirira guianensis is a common tree used in traditional medicine in French Guiana against several infectious diseases (malaria, leishmaniasis, bacteria, etc.). The bioassay-guided purification of CH2Cl2 bark extract led to the isolation of four cyclic alkyl polyol derivatives: 4,6,2'-trihydroxy-6-[10'(Z)-heptadecenyl]-1-cyclohexen-2-one (1a), 1,4,6-trihydroxy-1,2'-epoxy-6-[10'(Z)-heptadecenyl]-2-cyclohexene (1b), 1,4,5,2'-tetrahydroxy-1-[10'(Z)-heptadecenyl]-2-cyclohexene (2), and 1,3,4,6-tetrahydroxy-1,2'-epoxy-6-[10'(Z)-heptadecenyl]-cyclohexane (3). The structures were established on the basis of ID and 2D NMR analyses. The anti-leishmanial, anti-plasmodial, anti-bacterial (on Staphylococcus aureus, Staphylococcus epidermidis and Escherichia coli), and anti-fungal (on Candida albicans) activities of the extracts and of these original compounds were evaluated. Two showed medicinal interest supporting the traditional uses of the plant. The structures were established through spectral analyses of the isolates and their derivatives