For my PhD thesis we used mercury diffusion pumps. Nasty things, but diffusion pumps require high molecular weights and relatively low vapor pressure, and the only other real alternative at the ...

Low pressure: includes the neon lamp, fluorescent lamps and low pressure sodium lamps. High pressure: such as the metal halide, high pressure sodium and mercury vapor lamps.

On Wednesday, City Council signed off on its $160 million plan to change the color of Chicago, replacing its 270,000 high-pressure sodium lights, which give the city its, um, distinctive orange ...

Mercury poisoning, also known as mercuralism, is the phenomenon of toxication by contact with mercury. The main dangers associated with elemental mercury are that at standard conditions for ...

An upcoming European Union regulation is about to shut down lamp-based projectors across the continent. Starting January 1st, 2026 the powerful Metal halide and UHP (Ultra High Performance) ...

Sodium light is a stark yellow suitable only for use in applications like street lighting, but the energy efficiency is very high. Early models gave 40 lumens per watt (lpw), a figure that reached ...

New study reveals eating too much sodium is No. 1 risk for diet-related death 06:08. Want to lower your blood pressure?Cutting back on salt in your diet could help do just that — and according ...