title: A computer controlled micro-spectrophotometer for the study of visual pigments.
mesh_terms: D000703:Analog-Digital Conversion; D000818:Animals; D001001:Anura; D003201:Computers; D007313:Insecta; D008722:Methods; D008853:Microscopy; D012160:Retina / Q000032:analysis; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry / Q000295:instrumentation*
chemical_list: D012168:Retinal Pigments