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Medical Laboratory Science Study Guide Chem Definitions

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

Electromagnetic Radiation   Has wave-like and particle-like properties.  
Radiant Energy   Characterized as a spectrum from short wavelengths to long wavelengths  
Wave Length   The distance traveled by one complete wave cycle measured in nanometers.  
Nephelometry   The measurement of light scattered by a particulate solution.  
Turbidometry   Measures the light blocked as a decrease in the light transmitted through the solution.  
Fluorescence   A process where atoms absorb energy at a particular wavelength, and the electrons release energy as they return to ground state by emitting light energy of a longer wavelength and lower energy than the exciting wavelength.  
Phosphorescence   The emission of light produced by certain substances after they absorb energy.  
Chemiluminescence   The process where the chemical energy of a reaction produces excited atoms, and upon electron return to ground state, photons of light are emitted.  
Bioluminescence   The process where an enzyme-catalyzed chemical reaction produces light emission.  
Luminometer   A generic term for the type instrument that is used to measure chemiluminescence and bioluminescence  
Chromatography   A technique where solutes in a sample are separated based on physical differences that allow their differential distribution between a mobile and stationary phase.  
Mass Spectrometer   An instrument that uses the principle of charged particles moving through a magnetic or electric field, with ions being separated from other charged particles according to their mass to charge ratio.  
Potentiometry   Technique used to determine the concentration of a substance in solution employing an electrochemical cell that consists of two half-cells, where the potential difference between an indicator electrode and a reference electrode is measured.  


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