Persons who work in high-mercury environments (such as dentists, dental technicians, workers in mercury-vapor lamp
factories, etc.) have been extensively studied and show no ill effects even at exposures 100 times greater than amalgam fillings can provide.
The tabletop system takes in water from a well or hand pump, for example, bathes it with ultraviolet radiation from a mercury-vapor lamp
, and sends it out free of germs.
Observing was fine until the local power company replaced a burned-out mercury-vapor lamp
near his property, ruining his view of the southern sky.
For lignin, a 1-hour UV pretreatment with a mercury-vapor lamp
(emitting a range of spectra at either 254 nanometers and higher or 300 nonmeters and higher) doubled the 10-day growth recorded for fungi dining on untreated material.