Science / Chemistry / Thermionic Emission: The emission of electrons or ions by a hot object. For example, the filament in a mass spectrometer spits out energetic electrons that ionize atoms and molecules in the sample.
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Science / Chemistry / Thermionic Emission: The emission of electrons or ions by a hot object. For example, the filament in a mass spectrometer spits out energetic electrons that ionize atoms and molecules in the sample. MORE
Science / Psychiatry / Positron Emission Tomography (PET): (poz-ih-tron e-mish-en toe-mog-ra-fe) A technique used to evaluate the activity of brain tissues. PET scanning is used as a research tool in schizophrenia, cerebral palsy, and similar types of brain d MORE
Business / Agriculture / Non-Road Emissions: Pollutants emitted by non-road engines and non-road vehicles, e.g., farm and construction equipment, gasoline-powered lawn and garden equipment, and power boats and outboard motors. The Clean Air Act, MORE
Science / Chemistry / Emission Spectrum: A plot of relative intensity of emitted radiation as a function of wavelength or frequency. MORE