seismic refraction and downhole survey were employed to study dynamic characteristics of subsurface materials in bam city, southeast of iran. the data acquisition was performed at 160 p and s-wave refraction stations and 15 boreholes in the city. to derive velocity depth sections along these profiles as well as to perform downhole diagrams, seisimager software was used. based on the obtained va...

One of the most commonly observed surface structures on the prokaryotic cell envelopes is monomolecular crystalline array of proteinaceous subunits termed Surface Layers or S-layers. Due their self assembly ability and the highly ordered, regular structure down to the nanometer scale, S-layers were demonstrated to possess a great potential for nanobiotechnological applications. Some probiotic b...

A proposed method for protecting carbon steel and hence reducing iron release in an aqueous solution saturated with H2S is presented in this paper. The method is based on forming a stable and resistant sulfide layer (pyrite, FeS2, or pyrrhotite, Fe(1-x)S, phase or a mixture of both) on the carbon steel surface. The study on the formation of the sulfide layer was...