Wissadula Medik. (Malvaceae) no Brasil: novas espécies e combinação

New Sulphated Flavonoids from Wissadula periplocifolia (L.) C. Presl (Malvaceae).

Wissadula periplocifolia (L.) C. Presl (Malvaceae) is commonly used in Brazil to treat bee stings and as an antiseptic. The antioxidant properties of its extracts have been previously demonstrated, thus justifying a phytochemical investigation for its bioactive phenolic constituents. This has yielded five new sulphated flavonoids: 8-O-sulphate isoscutellarein (yannin) (1a); 4'-O-methyl-7-O-sulp...

Diferenciação Intersetorial Na Interação Entre Empresas E Universidades No Brasil

This short paper presents results based on special tabulations prepared by IBGE, using data from Pintec in order to focus on the interaction between firms and universities in the Brazilian industry. The basic hypothesis states that the relevance of universities as a source of information to the firms’ innovation activities is greater when firms are engaged in R&D activities (both internal and e...

Ficcao cientifica, fantasia e horror no Brasil 1875-1950 (review)

Tecnologias e redes informacionais e suas implicações sobre a força de trabalho no Brasil

The use of information technology networks and its impact on the labor force by means of continued education at a distance is but a few of the most appropriate ways of carrying out an analysis and identification – all assisted by theoretical construct – of the changes that are now taking place in our so called information/knowledge society. It has been, therefore, the main purpose of this work ...

A Química No Brasil De Hoje

CHEMISTRY IN TODAY’S BRAZIL. This article surveys the birth and development of the chemical community in Brazil in the last 50 years. Starting from humble beginnings, a vigorous community developed and rapidly expanded the scope of its activities across the country. Many problems remain unsolved, however, and to these have now been added dismal government policies which threaten to dwarf many o...