The article presents the main results of research on plaster samples with different physical parameters their structure. basic parameter taken into account in is aeration. Other were also considered, but they play a minor part. acoustic properties modified measured by sound absorption coefficient; compared coefficient standard plaster. influence other physical, mechanical and thermal was not an...

   Physical study of nano ribbon, tetragonal bundled and isolated nano tube SiC (7,0) are part of our project in knowing new nano material such a silicon carbide. These studies have been performed by density function theory. Effect of ribboning, tubulating and tetragonal bundling on the physical properties such as stability, structural constants, optical physics, chemical parameters and mag...