title: A field-portable microspectrophotometer.
mesh_terms: D000818:Animals; D008853:Microscopy / Q000295:instrumentation / Q000379:methods; D010786:Photoreceptor Cells / Q000166:cytology; D011894:Rana pipiens; D012160:Retina / Q000166:cytology; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry / Q000295:instrumentation* / Q000379:methods
chemical_list: D012168:Retinal Pigments