SUBJECT INDEX 



Opsin (visual purple protein) (contd.) 

 /jo-retinenci a, reaction with, 144- 



145 

 wo-retinenei b, no reaction with, 145 

 neo-reiinenQi a, no reaction with, 



144-145 

 neo-T&tinenei b, reaction with, 144- 



146 

 photopsin (cone opsin), 152, 154-155 

 retinenesj, reaction with, 144-146 

 retinenesg, reaction with, 151 

 scotopsin (rod opsin), 151-152, 



154-155 

 SH- groups in, 115-118 

 Optical cell, 14, 20, 66, 86 

 Optical density (see Density, optical), 



15, 18,21 

 Ora serrata, 2-3 

 Orbitals, n, 101, 122-123, 133 

 Ovoverdin, 90, 96, 123 

 Owl {Strix fiammia), 28 

 Ox, 99 



Palmityl sulphonate, 1 1 



Partial bleaching, method of, 162-169 



results of, 169-175 

 Pauli's Exclusion Principle, 101 

 PCMB(/7-Chloromercuribenzoate), 118 

 Peptone, reaction with retinenci, 106 

 Perca flavescens (White perch), 30, 36 

 Perca fiuviatilis (Perch), 28, 41 

 Perch (Perca fiuviatilis), 28, 41 

 Perch, white (Morone americana), 



45-47 

 Perch, white (Perca flavescens), 30, 36 

 Photochemical reactions 



dimerization of anthracene, 63-64 



hydrogen-chlorine, 64-65 



visual purple, 60-62, 65-84 

 Photometric curves, method of, 65-79 

 Photoproducts 



See Indicator yellow, Lumi-rhodop- 

 sin, Meta-rhodopsin, Retinene, 

 Vitamin A 

 Photopsin, 154 

 Photosensitivity, 75-78 

 Photosensitization, 62, 135 

 TT-Orbitals, 101, 122-123, 133 

 Pickerel (Esox reticulatus), 34-36, 



40-41 

 Pigment epithelium, 4, 8-9, 26 

 Pike (Esox lucius), 28, 39^1, 158-160, 



172, 178-179 

 Pike-perch (Luciope.ca sandra), 28 



Polaroid, 196 



Polyenes, cis-trans isomers of, 128 



Pomolobus pseudoharengus (Alewife), 



35-36 

 Pomoxis sparoides (Calico bass), 34-35, 



40 

 Porphyropsin (Visual violet) 

 disputed Amax, 33 



in Carp (Cyprinus carpio), 28-30, 

 34-35, 39-41, 148-150, 163-164, 

 175, 178-179 

 in Pike (Esox lucius), 158-162, 169, 



172, 174, 178-179 

 in Tench (Tinea tinea), 28-30, 39^1, 



56 

 in fish (Kottgen & Abelsdorff), 29-30 

 in fish (Wald), 33-34, 36-37 

 wo-porphyropsin, relation to, 151 

 not a unique pigment, 38-41 

 photoproducts of, 45-46, 149-151, 



179 

 regeneration spectrum of, 150 

 retinencg, relationship to, 32, 154-155 

 transient of, 45-46 

 vitamin Ag, relation to, 32 

 Prionotus carolinus (Sea robin), 33-34, 



36 

 Pupil, 3 



Quantum theory, 63 



Quantum yield (Quantum efficiency), 



63-65, 68, 74 

 increase of through chain reaction, 



64-65 

 of visual purple bleaching, 77 

 reduction of, through deactivating 



collisions, 63-65 

 reduction of, through fluorescence, 



63-65 

 reduction of, through regeneration, 



79-82 



Rabbit, 28-30, 33-34, 82-84, 198-199, 



202 

 Rana catesbiana (Bull frog), 30-31, 



33-34, 189 

 Rana esculenta (Edible frog), 30-31, 



189-191 

 Rana pipiens, 30-31, 33 

 Rana temporaria (Common frog), 28- 



29, 186-190, 192-193 

 Rainbow Trout (Salmo irideus), 36, 



169-171, 178-179 

 Rat, 53, 99 



213 



