Bubble-based actuation in microfluidic applications is attractive owing to elementary microfabrication requirements. In the present study, the mechanical and chemical characteristics of electrochemically generated bubble valves were studied. By generating electrochemical bubbles as valves directly inside the channel, valves could be closed and opened in milliseconds. Whereas bubble inflation (o...

From the viewpoint of safety, non-viral vector systems represent an attractive gene delivery system for gene therapy. However, the transfection efficiency of non-viral vectors in vivo is generally very low. Previously, it was reported that microbubbles, utilized as imaging agents for diagnostic echocardiography, could promote gene delivery into cells when combined with ultrasound exposure. We t...

PURPOSE The present study aims to investigate the number and characteristics of retinal detachment with atopic dermatitis (AD) in these 20 years, and the number of the first visit AD outpatients in almost the same period. METHODS A retrospective review of 101 consecutive surgically treated retinal detachments with AD patients from 1992 to 2011 was conducted. Retinal detachments were divided i...

harvesting of sour cherries is very difficult task which is done either by machine or hand. in order to facilitate fruits harvesting ethephone with different densities is used. in this research work iranian produced ethephone with density of 1.18 g/cm3 and england produced ethephone with density of 1.45 g/cm3 was utilized with different concentration (0, 150, 225 and 300) in a 2×4 factorial exp...

OBJECTIVE To compare anatomic and visual acuity outcomes, as well as complication rates, after retinal detachment repair using 1000- vs 5000-centistoke silicone oil. METHODS Records of all patients who underwent retinal detachment repair with silicone oil at one institution between January 1, 1995, and December 31, 2000, were reviewed. Anatomic outcomes included retinal redetachment and macul...

AIM To describe a novel technique for the preparation and transplantation of posterior corneal lamellae consisting of endothelium and bare Descemet membrane with a stromal supporting rim. METHODS Posterior lamellar discs for Descemet membrane endothelial keratoplasty with a stromal rim (DMEK-S) were prepared manually immediately before surgery using the big bubble technique. The retrospective...

The present dissertation aimed to develop a new microfluidic system for a point-of-care hematocrit device. Stabilization of microfluidic systems via surfactant additives and integration of semipermeable SnakeSkin® membranes was investigated. Both methods stabilized the microfluidic systems by controlling electrolysis bubbles. Surfactant additives, Triton X-100 and SDS stabilized promoted faster...

INTRODUCTION Bubble columns are widely used in industrial gas-liquid operations (e.g. gas-liquid reactions, fermentations) in chemical and biochemical processes industries, due to their simple construction, low operating cost and high-energy efficiency. In all these processes, gas hold-up and bubble size are important design parameters since they define the gasliquid interfacial area available ...

Boiling is an extremely effective way to promote heat transfer from a hot surface to a liquid due to numerous mechanisms, many of which are not understood in quantitative detail. An important component of the overall process is that the buoyancy of the bubble compounds with that of the liquid to give rise to a much-enhanced natural convection. In this article, we focus specifically on this enha...

The aim of this report is to present the outcome of the surgical removal of a giant subfoveal retained perfluorocarbon liquid (PFCL). The case is a 65 years old man undergone pars plana vitrectomy and silicone oil implantation for macula-off superior retinal detachment about three months ago. He admitted our clinic with a complaint of gradual visual loss in the left eye. His visual acuity in th...