background: in general, measurements of solar ultraviolet (uv) radiation are related to horizontal surfaces. while the hu­mans walking and standing outdoors expose to the natural solar uv radiation, their eyes, cheeks, extremities, trunks, or many other anatomical sites are close to vertical plane and random orient to different directions. in this study, we character­ized the diurnal variations...

Visible light photopolymerization has been extensively studied during the last decades since alternatives to UV processes have be found rapidly. Indeed, based on Minamata Convention, Hg irradiation setups must suppressed from industrial applications. Even if use of visible is beneficial in terms depth cure and safety for manipulator, water still far aside other polymerization processes. At pres...

background: peritoneal dialysis is one of the most prevalent types of dialysis prescribed to the patients suffering from renal failure. studies on the factors affecting the survival of these patients have mainly used log-rank test and cox analysis. the present study aimed to investigate the risk factors affecting short- and long term survival of patients on continuous ambulatory peritoneal dial...

The established state-of-the-art for composite solid propellant grain manufacture consists in mix-cast-cure process using hazardous chemicals and specific molds forming. In most of the cases, polyaddition oligomers involves isocyanate functional groups. Construction constraints limit feasibility geometries, confining pressure-time history rocket motors to some configurations. Composition pot-li...

The desirable chemical, physical, electronic, and optical properties of TiO2, as well its high availability, non-toxicity, low price, make it very popular in the modern functional textile industry. Here, TiO2 from titanium tetraisopropoxide (TTIP) precursors at concentrations 2, 4, 6% commercial nanoparticles (NPs) dispersion form were applied to cotton textiles using low-temperature applicatio...

this research investigates the effect of the post-cure time on the residual stresses in laminated composites. laminated composites were made of t300 carbon fibers and epoxy resin. the post-cure process was carried out at the constant temperature of 120 °c for 6 and 12 hours for two specimens. the slitting method was employed to determine through-thickness residual stress distribution of the com...

fourier transform infrared (ftir) and gel permeation chromatography (gpc) wre respectively utilized in determining the changes in isocyanate (nco) concentration and molecular weight (mw) and its distribution (mwd) in polyurethanes during their cure and postcure stages. samples, originally cured at 45°c, were taken through accelerate aging tests at various temperatures. the ftir and gpc analytic...