Index 



289 



Neutrons, protection against, 274 

 Nonviable cells, 164 

 Nuclear effect on energy quanta, 

 178 



o 



Oil diffusion pumps, 243 

 Operating conditions, physical in- 

 vestigations of, 249 

 Optics, physical, 3 

 Organism-type viruses, 159 

 Oscillator, heterodyne, 48 

 Oscillators, radio frequency, 54 

 Oscillograph, cathod-ray, 39 

 Oscilloscope, double-beam cathod- 

 ray, 41 

 Oxidative processes and narcosis, 

 31 



Pattern of lipid-protein-enzyme re- 

 lationship. 20 

 Paucimolecular theory. 18 

 Penetrating radiations, biological 



effects of, 83 

 Percentage depth dose. 250 

 Peripheral blood flow measuring, 53 

 Permeability and enzyme activity, 

 27 



— and fat solvents, 23-25 



— on tanning, effect of, 25 

 pH meters, electronic, 51 

 Phantom measurements, 217 

 Phonoelectrocardioscope, 41, 43 

 Photocells. 52 



Photoelectric absorption of radia- 

 tion quanta. 178 



— colorimeters. 52 



■ — hemoglobinometer. 52 

 — plethysmography. 53 

 Physical advantages of high-volt- 

 age beam, 252 



— basis of heat therapy, 59 



— dose and biological response. 87 

 ■ — estimates of energy absorption. 



194 



Physical factors on volume dose, 

 effect of, 202 



— investigations of operating con- 



ditions, 249 



— optics, 3 



Physics in biology and medicine, 

 influence of, 10 



— in medicine, 1 



— in radiotherapy. 7 

 Piezoelectric microphone, 50 

 Plethysmography, photoelectric, 



53 

 Potentials, muscle action, 36 

 — , nerve action, 35 

 Principle of equivalence. 186 

 Production of some chromosome 



structural changes, mode of, 



151 

 Proliferating cells, radiosensitivity 



of, 101 

 Protection against neutrons. 274 

 Protective methods in radiologv, 



264 

 Protective schemes, 275 

 Protein-lipid-enzyme relationship, 



pattern of, 20 

 Proteins and lipids. 14 

 Pulse tracing, electrical jugular, 



45 



— velocity, measurement of the, 53 

 Pyron, 65 



Quality of a beam of radiation, 179, 



205 

 ■ — of radiation. 71 

 "Quanta, energy, 62 

 Quantitative histological analysis of 



radiation effects in human car- 



cinomata. 162 

 Quantitv or dose of radiation, 



179' 

 Quantum character of radiations 



and interaction with matter, 



177 

 — hit theory. 86 

 Quinone, tanning action of, 26 



