Air bubbles are used in chemical, biochemical, environmental, and food process for improving the heat and mass transfer. Due to the dominance of non-Newtonian liquids used in various process industries, an understanding of bubble rise in rheologically complex liquids has grown to be important. An experimental study of the bubble rise velocity and drag co-efficient at high Reynolds number in non...

Purpose To evaluate the efficacy and safety of air bubble technique for vitrectomy in aphakia. Study Design Prospective interventional uncontrolled case series. Methods This study included 53 eyes of 53 patients who are phakic and indicated for phacovitrectomy (7 eyes, group 1), aphakic and indicated for vitrectomy (22 eyes, group 2), or underwent unplanned vitrectomy for immediate manageme...

In 200 cases of retinal detachment successfully treated without drainage of subretinal fluid complete reattachment of the retina was achieved in the first postoperative week in 76 per cent of cases. Delay in subretinal fluid absorption in the remaining 24 per cent of cases was directly related to the duration of the retinal detachment but was not influenced by the patient's age, refractive erro...

A system integrating a trapped bubble with an optofluidic interferometer is introduced. This system allows rapid analysis of the oscillatory characteristics of the bubble when it is excited by an acoustic wave. Such a system shows promise in studying the physics of these oscillations specifically the effects of surface tension and viscosity.

A new concept for the localized characterization of gas evolving electrodes based on scanning electrochemical microscopy (SECM) is suggested. It offers information about the spatial distribution of the predominant locations, which represent the most active catalytic sites, and dynamic characteristics of gas-bubble departure. The knowledge about gas-bubble departure is critical for the assessmen...