The Lewisburg Area Joint Sewer Authority intends to change its disinfection process from chlorine gas to ultraviolet light, a move that it says would be safer for both people and the environment. The ...
Since the 1980s, cutting-edge lithography has shifted from the 365 nm 'i-line' of mercury vapour lamps to deep-ultraviolet light from excimer lasers at 248 nm (krypton fluoride lasers) and 193 nm ...