The impact of concrete composition and roughness on the formation microalgal biofilms their photobiology were studied marine infrastructures presenting four different compositions combined with two degrees (rough smooth). structures first inoculated a natural microphytobenthic biofilm immersed in sterilised seawater controlled photoperiod for six days. Photosynthetic activity was assessed an im...

Fabrication of surface reliefs is achieved by raster scanning dry photopolymer films under a focused laser beam. The formation of the structure takes place subsequent to illumination without any chemical treatment or wet processing. Computer-generated optical elements can be recorded quickly, easily, and at low cost. The technology is particularly well suited for rapid prototyping and design pu...

I . Calcite font, Mosan, about I 200. Diameter 5I h incht someone else's research or the discovery of a new artifact or document, and a stymied investigation may be started afresh, sometimes after a lapse of decades. One of the rrsost famous cases of the missing central clue is that of the carved medieval alabaster plaques. These small reliefs, measuring about a foot by two feet and depicting t...