SUBJECT INDEX 



663 



Photographs, cloud chamber, 506-7, 515 

 Photosynthesis, action spectrum, 431, 

 439 



quantum yield, 419, 438-9, 449 

 Planck's constant, 418 

 Planning research, 1-38. See also 



Design of experiments. 

 Plutonium, 498 

 "Point-heat" concept, 462-4 

 Poiseuille's law, 125 

 Poisson distribution law, 511, 623 

 Poisson equation, 463-5, 484-5 

 Polarized light, 361-3 

 Polarizing filters (Polaroid), 362, 374 

 Polonium, 535 

 Positrons, 603-4 



Potassium chloride bridge, 245, 6 

 Potential measurements, 237-59 



equipment, 248-59 



insulation, 246-7 



salt bridges, 245-6 

 Potentials, action, 259-62 



injury, 260-1 



liquid junction, 239 



membrane, 240-1, 259-62 

 Potentiometric circuits (thermo- 

 couples), 145-7 

 Potentiometric method of resistance 



measurement, 158 

 Power supplies, 257-8 

 Preservation, body fluids, 216-8 



laboratory cultures, 215-6 

 Problems. See Research problems. 

 Proteins, protective role during freez- 

 ing-drying, 225 

 Protons, 491 ff. See also Ionizing 

 radiations. 



dose rate, 545-6 



ion density, 502-4 



ranges in tissue, 526-7 



recoil, 530 



source, 526-8 

 Protoplasm, viscosity. 111 ff., 126-8 

 Publications, effective, 32-37 



Quantitative analysis. 

 dilution method. 



See Isotope 



Quantum efficiency, 437 



Quantum yield, 419, 437. See also 



Radiochemical yield. 

 Quartz crystal oscillator, 318-22 

 (Juick-freezing, and the freezing-drying 

 process, 21 1-32 

 of materials for storage, 214-5 

 principle, 211-2 



R 



r. unit (roentgen), 457, 496-7, 538-43 

 r.e.p. (roentgen equivalent physical), 



497, 540, 639 

 Radiation. See also specific types, e.g., 

 Neidrons, X rays. 

 data, statistical treatment, 484-6 

 hazard to personnel, 494-8, 638-43 

 sources, light, 432-5. See also Arcs 

 and Lamps. 

 Radicals, hydroxyl, 516-8 

 Radioactive elements, artificial. See 

 Radioisotopes. 

 occurrence, 494-6 

 Radioactive tracers. See also Radio- 

 isotopes. 

 radiation emitted, 601-4 

 Radioactivity, counting time for vari- 

 ous accuracies, 623-6 

 measurement, 610-30 

 terminology, 601-5 

 Radioautographs, 369, 636-8 



of zinc in a tomato, 637 

 Radiochemical laboratory, planning, 



643-8 

 Radiochemical problems, 630-3 

 Radiochemical yield, 515-9 

 Radioisotopes, advantages, relative, 

 564-6 

 availability, 606-10 

 biological applications, 648-50, 654 

 of biological interest, 608-9 

 decay law, 604-5 

 design of laboratories, 643-8 

 disposal problem, 646-8 

 errors in sample mounting, 626-7 

 exchange reactions, 634-5 

 handling techniques, 630-8 

 impurities, 632-3 



