228 



SUBJECT INDEX 



Plaque technique, 11 



Plate double layers, forces between, 206 



Pneumococcus transforming factor, 112 



absorption spectrum of, 149 

 Poiseuilles flow law, 22 

 Poliomyelitis, Lansing, dimensions, 5, 65 

 Polypeptide attachment, 130 

 Polypeptides and virus surfaces, 124 

 Potato leaf roll virus, lack of observed 



particle, 21 

 Potato paracrinkle virus, lack of observed 



particle, 22 

 Potato virus X, rod-like particles, 21 

 thermal inactivation, serology and in- 

 fectivity, 140 

 Potato virus Y, lack of observed particles, 



22 

 Potato yellow dwarf virus, buoyancy, 

 electron microscopy and sedimenta- 

 tion, 45 

 sedimentation, 34 

 Potential energy distance diagrams for 



macromolecules, 214 

 Precipitin method, 9 

 Pressures in sound waves, 169 

 Primary ionization, linear distribution, 72 



space distribution, 74, 75 

 Protective action against free radicals, 89 



of broth, 90 

 Protein coating of virus, 179 

 Protein internal bonding, 105 



structure, 104 

 Provirus, 12 



Psittacosis virus, dimensions, 5, 65 

 growth in membranes, 22 

 optical microscopy, 15 

 Purified virus preparations, 10 

 Purine absorption, 149 

 Pyrimidine absorption, 149 



Q 



Quantum yield, 162 



R 



Rabbit papilloma virus, chemical com- 

 position, 7 

 diffusion constants and radius, 28 

 dimensions, 65 



Rabbit papilloma virus, motion studies, 

 51 

 particle mass, 31 

 Rabies virus, dimensions, 65 



vaccine, by electron bombardment, 139 

 by U.V. action. 161 

 Radiation inactivation dimensions, 92 

 Radiation sensitive element, 76 

 Radiation studies, on infectivity, 91 

 on vaccinia, 91 



structural inferences from, 100 

 utility of, 90 

 Radical yield for virus inactivation, 89 

 Radius of gyration for X-ray scattering, 



59 

 Recombination of free radicals, half life, 



88 

 Red cell receptors, 10 

 Relative viscosity plot, 42 

 Ribonucleic acid, 152 

 Roentgen, 88 



Roentgen equivalent physical (rep), 88 

 conversion factor to primary ionizations 

 per cc, 88 

 Rous sarcoma virus, U.V. action spectrum 

 of, 163 



Scattering, X-ray, 58 

 and hydration, 62 

 large angle formula, 59 

 small angle formula, 59 

 Schlieren method, 37 

 Secondary radiation effects, 88 

 Section technique in electron microscopy, 



19 

 Sedimentation, 24, 29 

 constant, 30 



as function of concentration, 50 

 diagram, 36 

 technique, 34 

 Selfelution, 9 



Sensitive cross section, M-5 phage, 85 

 for random bombardment, 13, 79 

 southern bean mosaic virus, 84 

 T-1 phage, 85 

 tobacco mosaic virus, 83 



