research - systematic investigation to establish facts

electron microscopy - microscopy with the use of electron microscopes

dark field illumination, dark ground illumination - a form of microscopic examination of living material by scattered light; specimens appear luminous against a dark background

fluorescence microscopy - light microscopy in which the specimen is irradiated at wavelengths that excite fluorochromes

stain - (microscopy) a dye or other coloring material that is used in microscopy to make structures visible