660 



SUBJECT I N D J: X 



H 



Half-life, radioisotopes, 604-5 

 Heat, capacity, 176-8 



latent, 179-81 



production from fat and carbohy- 

 drate catabolism, 202 



quantity, 178-9 

 Heat of combustion, nutrients, 200 

 Heat transfer, dehydration of frozen 

 materials, 212 



practical importance, 20()-7 

 Heavy water, 574, 594 



source of slow neutrons, 532-3 

 Hemocytometer, 376 

 Higinbotham circuit, 621 

 Histological preparations, l)y freezing- 

 drying method, 218, 223-4 

 Hydroxyl radicals, 516-8 

 H.ydrogen peroxide, 516-8 



Illumination, epi-, 357-8 



importance, 372-3 



microscopy, 372-4 



opaque objects, 354-8 

 Image formation, 344-9 

 Immersion (microscopjO, 346, 374 

 Immersion oil, nonfluorescing, 364 

 Impedance measurements, 262-9 



cell constants, 267-9 



methods, 265-7 

 Inactivation, mechanism, 515-9 

 Index of refraction. See Refractive 



index. 

 Inductance, cell membrane, 269 

 Infrared microscopj^, 351-2 

 Injury potential, 260-1 

 Instrumentation, 17-18 

 Insulating materials (electrical), 247 

 Interference filters, 434 

 Interference microscopy, 365-6 

 Ionization, measurement, 540-2 



in tissue, 556-7 

 Ionization chambers, 541-4, 610-1 



design, 543-56 



extrapolatior', 556 



neutrons, 548-9 



shallow 543-4 



Ionization chambers {continued): 



Victoreen, 457, 546 

 Ionization current, measurement, 540- 



2 

 Ionizing radiations, 451-560, See also 

 under specific types of radiation, 

 carcinogenic agents, 497-8 

 daily environment, 494—6 

 effects on living cells, 49.3-4, 497-.500 

 health hazard, 496-500 

 measurement, 537-57 

 monitoring for health and safetj^, 



638-43 

 mutagenic agents, 498-500 

 physical characteristics, 492-3, 500- 



37 

 soiu-ces, 500-2, 519-537 

 spacing of ions, 501-9 

 Ions, acceleration (mass spectrometry), 

 575-7 

 clusters, 509-19 



size, 510-12 

 density in tissue, 502-19 

 detection (mass spectrometry), 564, 



579-83 

 energy equivalent, 542-3 

 energj- of production, 551 

 formation positions, 514-9 

 mass spectra, 579 

 movement of, 514-9 

 spacing, along tracks, 501-19 

 significance, 509-13 

 Irradiation, conditions, choice of, 54.3- 

 56 

 embryological material, 482-4 

 Isoelectric point, osmotic pressure at, 



54-55 

 Isothermal calorimeters, 184 

 Isotope concentrations, absolute ac- 

 curacy, 586-7 

 calculation, 583-6 

 Isotope dilution method, 568-70, 635 

 Isotopes, as tracers. See Stable iso- 

 topes and Radioisotopes. 



Junction potential, liquid, 239 



