Heat Caused by Dental Implant Fixture Seating: Temperature In Vitro and Software Simulation.

Surgical implant procedures and insertions can result in mechanical and thermal damage to the involved bone. When dental implants are inserted, thermal injury can exponentially increase with augmented temperatures that may be caused by friction between fixture and drilled bone. Excessive heat induces delayed regeneration due to bone cell necrosis and implant mobility, resulting in dislocation of the hydroxyapatite structure.

Phage shock protein G, a novel ethanol-induced stress protein in Salmonella typhimurium.

Exposure to ethanol is a stress condition that Salmonella typhimurium often encounters during its life cycle. Food, beverage, drugs, and cosmetics have a long history of using alcohols to control pathogens. Ethanol is also commonly used for disinfecting medical instruments.

Radiological image enhancement by X-ray choppers.

A new scatter control technology consisting a pair of X-ray choppers is being developed to provide improved radiographic contrast and measure geometrical distribution of scattered photons. By placing the choppers (which are rotating by different angular velocities) in two sides of the static object in direction of X-rays, the beam is position-encoded by two frequencies f1 and f2 due to the chopping velocities. The chopped beams reaching to image detectors generate a dynamic image consisting blinking pixels, while some non-chopped beams provide constant gray level of pixels.

Conceptual modeling of cardiovascular sounds.

In this paper, it is shown that the main source of mechanical energy of cardiovascular (CV) system i.e., rhythmic heart contraction is transformed to the oscillations of the CV walls and blood flow, and finally CV acoustical waves.