Trends and prospects of international major commodity prices. In 2012, the international commodity markets have seen declining prices, especially during the first half of the year, with some improvement mainly in the last quarter. On the whole, most of major commodity prices declined, following...

In order to endow the commercial pure titanium dental implant material with antibacterial property and aimed at avoiding the invalidation that is caused by bacterial adhesion on the surface, a silver coating was fabricated via double glow plasma surface alloying. The antibacterial property of...

To explain the process of development historically documented, we consider a model with three economic sectors (agriculture, manufacturing and services) characterized by different productivity gains and by saturation levels in the demands of agricultural and manufactured goods. Our parsimonious...