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Fluorescent Protein Flashlight

BioPhotonics
Nov 2009
NIGHTSEARequest Info
 
DFPlight.jpgThe NightSea DFP-1 dual fluorescent protein flashlight from NightSea can be used in transgenic experiments to screen for both green and red fluorescent proteins. It includes two high-intensity LEDs, each of which is fitted with a custom interference filter. Users can turn the switch one way to produce blue light that excites green fluorescent proteins, or the other way for green light that excites red fluorescence. The flashlight comes with two pairs of barrier filter glasses, one for each LED, that block all of the reflected light and transmit the fluorescence with high contrast.


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GLOSSARY
fluorescence
The emission of light or other electromagnetic radiation of longer wavelengths by a substance as a result of the absorption of some other radiation of shorter wavelengths, provided the emission continues only as long as the stimulus producing it is maintained. In other words, fluorescence is the luminescence that persists for less than about 10-8 s after excitation.
high contrast
A term used to describe a photograph, film or television picture where the values for black and white areas are at or near their limits, thereby giving the maximum degree of difference between them.
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