Proceratophrys caramaschii was described only from a single locality in Mucuripe, Fortaleza municipality, Ceara state, Brazil. The discovery of a new population of this poorly known species facilitated the collection of ...

This study evaluated the influence of silver nanoparticles (NAg) incorporated into the primer of a three-step adhesive system (Scotch-Bond Multi-purpose) over the composite-resin colour (CIELab and CIEDE 2000) as a function ...

This paper proposes a method for quantitative colour analysis aimed at determining colour variation between different sets of films with a common selection criterion. The process is exemplified by comparing films selected ...

The CIE reference colour stimuli, X, Y, and Z, were derived by constructing a triangle outside the R,G,B triangle and outside the area bounded by the spectrum locus and the purple line. By this means, all colours, ...

Variable proportions of four kinds of cones with different coloured oil droplets, are distributed in all retinal quadrants. Pigeons can learn and generalize colour recognition in any portion of their visual field. Since ...

Proceratophrys caramaschii was described only from a single locality in Mucuripe, Fortaleza municipality, Ceará state, Brazil. The discovery of a new population of this poorly known species facilitated the collection of ...

Abstract Background Colour and shape polymorphisms are important features of many species and may allow individuals to exploit a wider array of habitats, including through ...