White Ribbon : Meaning: This color is a symbol of innocence, victims of terrorism, violence against women, peace, right to life, bone cancer, adoptees, and retinal blastoma Pearl Ribbon : Meaning: This color is a symbol for emphysema, lung cancer, mesothelioma, and multiple sclerosis
From Wikipedia, the free encyclopedia. Schematic of an electron capture detector for a gas chromatograph with a 63 Ni source. An electron capture detector (ECD) is a device for detecting atoms and molecules in a gas through the attachment of electrons via electron capture ionization. The device was invented in 1957 by James Lovelock and is used in gas chromatography to detect trace amounts of chemical compounds in a sample.
Radar detectors use a superheterodyne receiver to detect these electromagnetic emissions from the radar gun, and raise an alarm to notify the motorist when a transmission is detected.