This investigation reveals the capability of Agave lechuguilla for trivalent and hexavalent chromium removal from aqueous solutions. Experimentation included pH profile, time dependence, adsorption capacity (K(F) and Q(L)), adsorption intensity (n and R(L)) and saturation capacity (q(s)) studies. Batch experiments were conducted at 22( composite function)C to characterize and model the adsorpti...

There are four main wine regions in Rio Grande do Sul state, Brazil: (1) "Serra Gaúcha"; (2) São Francisco Valley; (3) “Serra Sudeste” and (4) “Campos de Cima da Serra”. The region is the oldest of Brazil, related to Italian immigration nineteen century. Regions (2), newer, showing similarities but soft changes climate soil conditions. Precision viticulture (PV) has advanced these poles last 20...

On May 18, 2001 UNESCO (United Nations Educational, Scientific and Cultural Organization) proclaimed kutiyattam, the Sanskrit theatre of India, one of nineteen "Masterpieces of Oral and Intangible Heritage of Humanity." This was the first time in history that this art has received a prestigious international recognition (see www.unesco.org/bpi/intangible_heritage/india.htm). To celebrate this m...

Nineteen eighty-nine marked the 25th anniversary of the publication of Herbert Marcuse's influential critique of "advanced industrial society," One Dimensional Man. Of the many books that Marcuse was to write during the 1960's and 70's, One Dimensional Man was the first o address the central concerns of the then emerging student and New Left movements. Ironically, a book that: analyzed the prof...

Stock Markets, like many other natural systems, are complex systems in a state of unstable equilibrium where future evolution depends on many parameters. Their evolution is characterized by different factors: political and social events, government policies, humour and strategy of the consumer environment. Even if attention has been focused on this system since the early years of the nineteen-c...

Henochilus wheatlandii, the only species of this genus, is critically endangered and was considered extinct for over a century. The rediscovery of this fish in 1996 made it possible to study its phylogenetic relationships with other species in the subfamily Bryconinae. The aim of this study was to characterise the karyotype of H. wheatlandii. Standard staining, C-positive heterochromatin and nu...