O gênero Portulaca L. (Portulacaceae) no Brasil

Investigation of the active constituents of Portulaca oleraceae L. (Portulacaceae) growing in Jordan.

The phytochemical analysis of the fresh aerial parts of Portulaca oleracea (Portulacaceae), growing in Jordan, using conventional chromatographic procedures resulted in the isolation of Beta-sitosterol, Beta-sitosterol-glucoside, N,N'-dicyclohexylurea, and allantoin. The last three compounds were isolated for the first time from this plant. The structure elucidation of these compounds was attai...

Revealing diversity in structural and biochemical forms of C4 photosynthesis and a C3–C4 intermediate in genus Portulaca L. (Portulacaceae)

Portulacaceae is one of 19 families of terrestrial plants in which species having C(4) photosynthesis have been found. Representative species from major clades of the genus Portulaca were studied to characterize the forms of photosynthesis structurally and biochemically. The species P. amilis, P. grandiflora, P. molokiniensis, P. oleracea, P. pilosa, and P. umbraticola belong to the subgenus Po...

Serviços de Governo Eletrônico: um estudo sobre o uso por indivíduos no Brasil

ENSINO DE ADMINISTRAÇÃO EM ENFERMAGEM NO BRASIL: o processo de construção de competências gerenciais

* Enfermeira. Professora Livre-Docente do Departamento de Orientação Profissional da Escola de Enfermagem da USP. **Enfermeira. Professora Titular junto do Departamento de Orientação Profissional da Escola de Enfermagem da USP. E-mail do autor: [email protected] Resumo O estudo teve por objetivos identificar as bases conceituais, metodológicas e pedagógicas no ensino da Administração em Enfermagem...

clínicos no Brasil : o Protocolo 028 AIDS , activism , and the regulation of clinical trials in Brazil

This paper examines the politics and practices of drug evaluation in Bra z i l . It tra c e s the history of AIDS activists’ influence on the organization of modern clinical trials and their scientific ra t i o n a l e . Using the Me rck indinavir trial as a case study, the authors discuss how org a n i zed civil society has developed strategies to intervene in the course of drug evaluation tri...