Apparatus for eliminating background interference in fluorescenc

Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation

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2504612, 356 39, 356 73, 356343, G01J 342, G01N 2164

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active

045737967

ABSTRACT:
The disclosure is directed to an apparatus for eliminating background interference during fluorescence measurements in a multiple laser flow cytometer. A biological particle stained with fluorescent dyes is excited by a laser. A fluorescence detector detects the fluorescence. The particle scatters light and a gate signal is generated and delayed until the biological particle reaches the next laser. The delayed signal turns on this next laser, which excites a different stained component of the same biological particle.

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Steinkamp, Orlicky and Crissman, "Dual-Laser Flow Cytometry of Single Mammalian Cells", Jour. Histochem. Cytochem. 27, 273 (1979).
Steinkamp, Fulwyler, Coulter, Hiebert, Horney and Mullaney, "A New Multiparameter Separator for Microscopic Particles and Biological Cells", Rev. Sci. Instrum. 44, 1301 (1973).
Steinkamp, Stewart and Crissman, "Three-Color Fluorescence Measurements on Single Cells Excited at Three Laser Wavelengths", Cytometry 2, 226 (1982).

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