Solar ultraviolet radiation at the surface of the earth is a recognized cause of skin cancer. Postulated anthropogenic reductions in the thickness of the ozone layer would lead to an increased amount of ultraviolet radiation and hence would be expected to increase the risk of skin carcinogenesis. This study uses hairless (Skh:HR) mice as an animal model to study this increased risk. The mice we...

In previous communications the authors have described the cellular and subcellular responses to ultraviolet irradiation directed to whole Chang liver cells and to portions of Chang liver cells (3-6). Two sources of ultraviolet have been utilized in these studies. One source was a mercury arc lamp the output of which was passed through a grating monochromator, and the second source was the ultra...

Solar ultraviolet radiation at the surface of the earth is a recognized cause of skin cancer. Postulated anthropogenic reductions in the thickness of the ozone layer would lead to an increased amount of ultraviolet radiation and hence would be expected to increase the risk of skin carcinogenesis. This study uses hairless (Skh:HR) mice as an animal model to study this increased risk. The mice we...

Abstract Soft lithography, a tool widely applied in biology and life sciences with numerous applications, uses the soft molding of photolithography-generated master structures by polymers. The central part photolithography set-up is mask-aligner mostly based on high-pressure mercury lamp as an ultraviolet (UV) light source. This type source requires high level maintenance shows decreasing inten...

The findings presented in the article by Khan et al. (1) are very similar to findings that I and two colleagues reported more than 25 years ago (2). In that work, we also employed a flame-thermal treatment of Ti plates to prepare TiO2 films at different temperatures. We also demonstrated water splitting, but under sunlight rather than under artificial illumination. Whereas we reported an energy...

In-duct ultraviolet germicidal irradiation (UVGI) systems treat moving air streams in heating, ventilation, and air-conditioning (HVAC) systems to inactivate airborne microorganisms. UVGI system performance depends on air temperature, velocity, cumulative operating time, variations in exposure time and other factors. Annual simulations of UVGI efficiency and space concentration that accounted f...

Recently, the aerospace industry has been facing many challenges, including an increase in production rates to meet market needs. In context of adhesives and liquid shim applications, this means possibility on-demand curing. other words, must cure slowly at room temperature process be accelerated any time allow for fastest polymerization possible. However, while curing is possible several ways ...