todays applying concrete structures is more usual than other structures which are used in buildings as in most of the world’s countries the application ratio of concrete to steel has increased from 10 to 1. sometimes these structures require strengthening vulnerable members because of deficiency in their loading system in usual and critical conditions. there are different methods for strengthen...

Beta-solenoids are a class of protein nanotube structures that are observed in virulence factors, prion proteins and amyloid fibrils. Here we investigate the compressive strength of the triple-beta-helix solenoid structure found in the cell puncture needle of the bacteriophage T4 virus. We characterize the compressive mechanical strength of this protein nanotube using full-atomistic molecular d...

PURPOSE To compare the flexural, tensile and compressive strengths of three denture base materials, namely, Lucitone 550, Bio Carbo Resin, and Eclipse. MATERIALS AND METHODS A total of 180 specimens were prepared, with 60 specimens of each material tested. The dimensions of the specimens for each test were made according to the ADA specification. They were stored in distilled water bath at 37...

The surface morphology, mechanical and optical properties of tetrahedral amorphous carbon (ta-C ) films by concurrent Ar ion bombardment during filtered cathodic vacuum arc (FCVA) deposition are investigated. The Ar ions were produced by an RF ion beam source at different ion energies ranging from 60 eV to 500 eV, in order to study the Ar ion-induced modification of ta-C films. Atomic force mic...