SUBJECT INDEX 



208- 



on PR, in adapted algae, 1922 

 on PS, 344-46, 1153, 1921-25 

 on R, 345, 1922, 1924 

 photochemical effects, in solution, 71, 

 81, 272, 501, 1499 

 in vivo, 344-46, 430, 532, 537, 564, 

 1405, 1921-25 

 PS in, 344, 1153 

 Umbrophilic and umbrophobic (heliophilic) 

 plants, 403, 409, 421-22, 533, 535, 

 724, 730, 986-89, 1230, 1261-62 

 Undercooling, of plants, 1219 

 Uranium compounds, effect, on greening, 

 429 

 on PS and R, 1919 

 as sensitizers, 78, 84, 85 

 Urethans 



Urethans {alkyl or phenyl), effect, on BChl 

 and Chi fluorescence, in vivo, 322- 

 23, 959-60, 1063, 1065-66, 1396-98 

 on fluorescence and photochemical 

 reactions, in vitro and in vivo, 66, 

 113, 117, 242, 284, 300, 321-24, 

 503, 539-40, 959-60, 1396-98, 

 1463, 1611, 1621 

 inhibition, of C( 1 1 ) uptake in light, 242 

 of catalase, 284 

 of CS, 113, 117 

 of HR, in Chlorella, 1621 



in chloroplast preparation, 66, 

 1611-12 

 of nitrate reduction, in Chlorella in 

 dark and light, 539-40 

 of O2 uptake by "grana sediments," 503 

 of PR in bacteria, 958-59 

 of PS, 284, 300, 321-24, 959-60, 

 1463-65 

 in flashing light, 1463-65 

 of R, 321 

 stimulation, of PO, 528, 538 

 of PS, 342 

 Uridine diphosphoglucose, C(14) tagging in 

 PS, 1676-77, 1686 

 P(32) tagging in PS, photostationarj' 

 state, 1708-09 

 Uridine-5' -phosphate, C(14) tagging in PS, 



1686 

 Uroporphyrin, "type III," as Chi precursor 

 in biosynthesis, 1769-70 



Urotropine, effect on reversible bleaching 

 of Chi and Pheo, 1506 



Valeric acid, as food for algae, 261 

 Versene, effect on chloroplast preparations, 



1553 

 Vinyl group, effect on chlorin spectrum, 



626 

 Vinyl phosphate, suggested CO2 acceptor in 



PS, 1676, 1692-93 

 Violaxanihol, absorption spectrum, 661, 



1810 

 in plants, 415, 416 

 Viologens, 233, 457 

 Virtual dipoles, interaction in dj^e crystals 



and monolayers, 1295, 1822-24 

 Visual purple, photochemistry, 521-22 

 Vitamin A, 471 

 Vitamin C. See Ascorbic acid 

 Vitamin K, 314, 1911, 1921 



"antagonists," effect on PS, 1910-11, 



1921 

 possible role in PS, 1911-12, 1921 

 Volatile components of leaves, 252-55 



W 



Warburg apparatus, 846, 848 

 Warburg-Schocken actinometer, 839-41, 



1526-28, 1949, 1952 

 Water 



Water, absorption spectrum, 734 

 association with Chi, 450-51 

 decomposition, as primary photoprocess 

 in PS and PR, 155-57, 168-69, 451 

 sensitized, in vitro, 71-74, 76, 78 

 deficiency effects. See Dehydration 

 discovery of its participation in PS, 23- 



24 

 effect, on Chi, BChl, and Pheo crj^stal- 

 lization, 1782 

 on Chi absorption spectrum in vitro, 



768 

 on fluorescence of Chi, Pheo, phthalo- 

 cyanine, Mg- and Zn-porph3Tins, 

 and Zn-chlorin, 766, 768, 771, 

 1835 

 on greening, 429 

 on reversible bleaching of Chi, 1492 



Volxxme I, pp. 1-599; Volume II.l, pp. 601-1208; Volume II.2, pp. 1209-2088 



