682 



Subject Index 



Hydrogen — continued 

 in meteorites 71 

 in primaeval atmosphere 114 

 isotopic exchange of 335 

 molecular, metabolism of 593-604 

 organic compounds formed from 154- 



156 

 photochemical production of 598-599 

 production by anaerobes 597, 59^-599 

 Hydrogen cyanide, formation of 172 

 by ultraviolet light 131 

 by electrical discharge 127, 130 

 Hydrogen donor utilization 611, 615-616 

 Hydrogen metabolism, in transitionary 

 state between anaerobiosis and aero- 

 biosis 593-604 

 Hydrogen peroxide, decomposition of 264, 

 270 

 energy of activation 271 

 Hydrogen transfer, and porphyrin pig- 

 ments 613 

 Hydrogcnase 335 



Hydrogenase systems, biological reduction 

 and 596-599 

 effect of oxygen on 600, 602 

 in micro-organisms 594 

 in transition from anaerobiosis to aero- 

 biosis 600-601 

 Hydrogenomonas flava 629 

 Hydrolases 565 

 a -Hydroxybutyric acid, formation of, by 



electrical discharge 125, 128, 130 

 Hydroxyglutamic acid, synthesis of by 



light 142 

 Hydroxylamine 183, 545 

 Hydroxynitriles, hydrolysis of 128-130 

 L-Hydroxyproline, in animals 225 

 Hyoscyamus niger 480 

 Hypertensin 243-244 



Iminodiacetic acid, formed by electrical 



discharge 125, 128 

 Imino-acetic-propionic acid, formed by 



electrical discharge 125, 128 

 Immunological specificity 216 

 Impsonites 92, Fig. 3 

 Inactis 34 

 Inclusion complexes, optical resolution by 



160-161 

 Inert gases, in earth's atmosphere 9, 26, 

 29, 56, 61 



on Jupiter 1 1 

 Inosine diphosphate 345, 346, 354 

 Inosinc monophosphate 346 

 Insecta, lipids in 508 



uricolysis in 513 

 Insulin, amino acids in 235, 236, 290 



fibrous-globular transition in 389 



species differences in 228, 241 



structure of 397 



Intermedin 246 



Invertase-protein complex 414 



Iodine, effect of supersonic vibrations on 



172 

 in metabolism 81 

 lodoacetate, effect on tobacco mosaic virus 



305 

 Iron, catalytic properties of 207-209, 211 

 Iron ores, in the early biosphere 33-34 

 Iron porphyrin 210 

 Irradiation, influence on origin of life 



107-108 

 Irreversible processes, thermodynamics of 



418-427 

 I'ioLeucine, composition of 249 

 in plants 410 

 peptide bonds in 233 

 synthesis of 193, 194 



by light 144 



by ultraviolet light 153, 154 

 Isology 504-505 



Isonicotinylhydrazide, effect of transami- 

 nation 536, 537 



Jupiter, angular momentum of satellites 10 

 atmosphere of 10 

 composition of 10 

 methane and ammonia in 7 1 



Ketoaldomutase 162, 166 

 Klebsiella pneumoniae 332 



Lactic acid, fermentation 595 



Lactobacillus 226 



Lactobacillus acidophilus 332 



Lactobacillus arabinosus 332-333, 574 



Lactobacillus casei 600 



Lactobacillus leichmannii 332, 333 



Lactobacillus plantarum 332-333 



Lagoons, origin of life in 171 



Lamprey, metabolism of 569 



Lanthionine, in locusts 225 



Leaf, ageing and regeneration of 480-484 



Legimies, amino acids in proteins of 410 



Legumin 579 



Leguminosae 579 



Leptotrix 629 



Leucine, deamination of 540 



in haemoglobin 508 



in plants 410 



peptide bonds in 233 



reduction of 547 



synthesis of 193, 194 

 by light 143 

 Leuconostoc 226 



Leuconostoc citrovoruni 332-333 

 Leucoplasts, transition to chloroplasts 404 

 Leucylglycinc, formation of 257 



