title: Simple densitometer for microbiology laboratories.
abstract: A densitometer composed of a microscope and a colorimeter is described. Results obtained with the microscope densitometer and with a standard densitometer compare favorably.
mesh_terms: D000818:Animals; D001431:Bacteriological Techniques; D002364:Caseins / Q000032:analysis; D003124:Colorimetry; D003720:Densitometry / Q000295:instrumentation*; D008722:Methods; D008853:Microscopy; D008892:Milk / Q000032:analysis
chemical_list: D002364:Caseins