748 



RADIATION BIOLOGY 



Collision, rate theory (see Absolute rate 

 theory of collisional processes) 



of second kind, 41 



triple, 29 

 Color temperature, 151 

 Compensatory movements, of cephalopod 

 eyes, 668 



of crustacean eyestalks, 665, 666-669 



of gastropod eyestalks, 669 

 Composite ocelli, 657 

 Compound eye, apposition type, 648 



in arthropods, 646-659 

 embryology, 647 



of Camharus, 633 



definition, 624 



degenerate, 653-654 



growth, 653 



hypertrophied, 653-654 



regeneration in trilobite, 654 



superposition type, 648 

 Compound eyespots, of Area, 633, 639 



of Branchioma, 632, 633 



definition, 624 



of Pectunculus, 639 



of Potamilla, 632 



of Spinther, 635 

 Compound ocelli, of chilopods, 645 



definition, 625 



of starfishes, 659 

 Condensed-ring systems, 100, 114 

 Conditioned responses in study of hue dis- 

 crimination, 666, 667 

 Configuration of molecular states, elec- 

 tronic, 80, 81 

 cts-Configuration and absorption intensi- 

 ties, 76-77 

 Congenital porphyria, in cattle, 710 



in man, 716 

 Conifers, chlorophyll production in dark, 



396, 427-429, 433 

 Conjugated molecules, 16, 11-20 



ionization potentials, 19 



van der Waals' forces, 19 

 Conjugation and planarity of molecules, 

 72 



insulation by methylene chains, 89 

 Continuous illumination, 524-525 

 Contrast discrimination, 621, 069 

 Copepods, compound eyes, 656 

 Copilia, camera-style, 635, 656 

 Corephium, ocelli, 637 

 Cormophyta, 30(), 

 Corn, agricultural yield, 277 



albino, 41 1 

 Cortex, electrical responses, 606-610 

 Corycaeids, reduced compound eyes, 656 

 Corycaeus, single ommatidium, 656 

 Corylus avellana, 350, 352 

 Cotyldeons, chlorophyll formation, 414 



Coulson-Rushbrooke theorem, 93 

 Coumarin, 528, 537 



influence of, on decoated seeds, 534 

 on thermosensitivity, 542 

 "(^racking" of hydrocarbons, 51 

 Crangon, hue discrimination, 666 



neuronal photoreceptors, 642 

 Crihrina, photosensitity, 628 

 Crinoids, photosensitivity, 659 

 Crossing of potential surfaces, 19, 39 

 Crossing points (see Potential energy) 

 Crustaceans, compound eyes, 646, 655- 



656 

 Ctenophora, photosensitivity, 629 

 Ciicurbita, 541 



Cumacids, compound eyes, 655 

 Curvatures, negative, 464, 467 



positive, second, 464 

 Cyanide, influence of, on fluorescence, 

 314, 315, 326 

 on hydrogenase, 326 

 on photosynthesis, 314, 326 

 on redox potential, 326 

 Cyanine dye spectra, 79, 80 

 Cyclohexene, 87 

 Cyclooctatetraene, 87 

 Cyclops, compound eye, 656 



latency, 664 

 Cymothoa, degenerate eyes, 656 

 Cypridina, compound eyes, 656 

 Cystine, 323 

 Cytochrome, 57 



D 



Danaus caterpillar, sensitivity to ultra- 

 violet, 666 

 Daphnia, eye movements, 656, 668 

 hue discrimination, 666 

 loss of eye pigment, 658 

 sensitivity to ultraviolet, 665 

 Dark adaptation, 664 

 Dark reactions, in Hill's reaction, 321- 

 323 

 in photosynthesis, 296, 297, 299, 316, 

 322, 323 

 (See also Photosynthesis, reaction 

 complexes) 

 Dark system in photosynthesis, reacti- 

 vation in light, 327 

 Daucus, 529 

 Day length, table, 156-157 



variation in, 507 

 Decomposition by radiation, 13 

 Degenerate compound eyes, 653-654, 658 

 DehuUed grains, 533, 537 

 Delesseria decepiens, 362, 364 

 Dendromecon rigida, 369 

 Density, optical, 146 



