We present the results of an experimental and computational study of the physics and chemistry of cavitation-ignition bubble combustion (CIBC), a process that occurs when combustible gaseous mixtures are ignited by the high temperatures found inside a rapidly collapsing bubble. The CIBC process is similar to that in a diesel engine. However, the length scales are very small (μm to nm) and the t...

In a typical experimental situation, a bubble of gas (usually just air, possibly doped with a noble gas) in a liquid (usually just water) is made to expand and then to contract violently under the influence of an applied acoustic field. During this motion, [6] the bubble emits a very sharp pulse of light, after which it expands again and oscillates about its equilibrium radius, until stability ...

Extradural hematoma with air bubbles has been described in literature. However the significance of it needs special attention with respect to prognosis. We report five case of extradural hematoma with air bubble and its management along with pertinent literature is reviewed briefly.

BACKGROUND Unique properties of engineered nanomaterials (ENMs) and products made of them have contributed to a rapid progress in the production and application of ENMs in different branches of industry and in factories with different production scale. Bearing in mind that nano-objects (nanoplates, nanofibres, nanoparticles), emitted during ENM production and application, can cause many disease...

separation method that is widely used in coal beneficiation for the separation of fine coal particles from associated minerals in water slurries. Since the cumulative recovery of a component in the concentrate is proportional to flotation time, the flotation process can be considered as a time-rate recovery process (Emad, Mohammad, and Bahram, 2010). Therefore, the general mathematical flotatio...

A comparative analysis of air-water flow properties was performed between two geometrically scaled stepped spillway models with step height of 5 and 10 cm respectively. The experiments were conducted in the same large size facility with chute slope of 26.6° and with the same phase-detection intrusive measurement devices. A full range of macroand microscopic air-water flow properties was tested ...

A discrete-bubble model that predicts the rate of oxygen transfer in diffused-bubble systems is evaluated. Key inputs are the applied gas flow rate and the initial bubble size distribution. The model accounts for changes in the volume of individual bubbles due to transfer of oxygen and nitrogen (and hence changing partial pressure), variation in hydrostatic pressure, and changes in temperature....

Recently, bubble-propelled micro/nanomotors have been considered as the cutting-edge micro/nano-sensing tools that use their unique features for fast detection of various hazardous environmental pollutants and biosensing.

The choice of using air or saline in epidural syringes during the loss-of-resistance technique, for identifying the epidural space, has been based largely on personal preference of the anesthesia provider. A survey of practice in the United Kingdom, thought to be similar to practice in the United States, revealed that the majority of anesthesia providers use air. Case reports have appeared in t...