Aspectos mineralógicos das "Viagens Filosóficas" pelo território brasileiro na transição do século XVIII para o século XIX Mineralogical aspects of 'Philosophical Voyages' through the Brazilian territory during the transition from the eighteenth to the nineteenth centuries

O objetivo deste artigo é mostrar os aspectos mineralógicos das "Viagens Filosóficas" realizadas no Império português na transição do século XVIII para o XIX, com ênfase no Brasil. Tais expedições científicas e seus resultados inserem Portugal e suas possessões no contexto científico do período. Acreditamos que as "Viagens Filosóficas" estão entre os elementos mais relevantes para entender o processo de institucionalização das ciências naturais no Brasil, particularmente - no caso deste artigo - as ciências mineralógicas.<br>The late eighteenth- and early nineteenth-century scientific expeditions undertaken by the Crown earned Portugal and its possessions a place on the period's scientific stage. These Philosophical Voyages provide us with invaluable elements for understanding the process by which the natural sciences were institutionalized in Brazil, especially - in the case of this article - the mineralogical sciences

Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved