INDEX 



329 



Matter (acoustic) waves, 47-48 

 absorption coefficient of. 52-54 

 and noise, 59 

 divergence of, 52 

 frequencv of different sounds, 50 

 penetration. 54 



physiological effects of intense. 60 

 power of certain sources (Table). 51, 60 

 speech, 59 



ultrasound and ultrasonics, 47 ff 

 velocity of, in air, water and solids, 50 

 Maximum permissible doses of ionizing 



radiations. 252, 255 

 Maxwell, on distribution of thermal energies, 

 198 

 on electromagnetic theory, 76 

 Measurement, and control, 298 



errors in, 17-20 

 Mechanical advantage of a system, 30 

 Mechanoreceptors, 58 

 Mediators, 84 

 Membranes, living: 



chemical composition and defects of, 140 

 effects of ionizing radiations on, 253 

 in the inner ear, 58 

 permeability of, 37, 142, 268, 270 

 phenomenological studies on, 142, 268 

 physical properties of, 140, 264 

 selectivity, 271, 268 

 synthetic, 268-271 



thickness, by electron microscopy, 141 

 Memory, of computers, 302 



suggested physicochemical nature of, 27" 

 Michaelis constant, K m , 203 



and binding of enzyme to substrate, 204, 

 205 

 Michaelis-Menten equation, 203 



in muscle, 288 

 Microelectrodes, 186, 264 ff (See also Elec- 

 trical Potentials) 

 Microendplate potentials, 291 

 Microirradiation, principle and techniques, 

 251 

 of cells and chromosomes, 251 

 Microradiography, 107-108 

 Microscopes, electron, 100 

 fluorescence, 100 

 optical 95, 96-98 



interference, phase, polarizing, 98-100 

 resolving power of, 98 

 X-ray, 100 

 Miner, Shackelton, and Watson, on sensory 



data, 102 

 Mitochondria, as energy factories of cell, 

 177 

 structure of membrane of, 141 



Mobility, ionic, defined, 220 

 and conductivity, 220 

 of ions in nerve membranes, and potential, 



267 

 table of values, 221 

 Molecular absorption of matter waves, 53 

 Molecular diseases, definition, 157 



anemias, etc., 157-159 

 Molecular weight, determination of, for 



macromolecules, 136-139 

 Momentum, definition of, 29 



conservation of, in shortening of muscle, 



280 

 transfer of, in fluid flow, 214 

 Moroney, on statistics, 17, 25 

 Morphine, infrared spectrum of, 84 

 Motor end plate, micropotentials at, and ir- 

 radiation of, 291-292 

 ms — millisecond 

 Muscle, bands in, 284 

 biophysics of, 161, 277 ff 

 chemical composition and structure of, 284, 



286, 287 

 electron microscopy of, 285 

 energetics of contraction of. 161, 280-282 

 fibers of, 284, 285 



force-velocity relationship, 280, 281 

 helical spring analogy, 278 

 molecular mechanism of contraction 



(theory) of, 286-290 

 speed of shortening, and load, 280, 281 

 strength of (in problem), 293 

 work done by, 280 

 Musical sounds, composition of. 50 

 Mustard gases, as radiomimetic chemicals, 



259 

 Mutations: 



and molecular diseases, 156 ff 



induced by chance, through excited states, 



146 

 induced by radiations, 253 

 induced by radiomimetic chemicals, 259 

 Myelin, electrical conduction in, 271 



formation by Schwann cells, 272 

 Myoglobin, physical properties of, 129 



structure of, by X-ray diffraction, 126, 132 

 Myopia, 90 

 Myosin, as ATPase, 282 ff, 287 



as contractile molecule in muscle, 286 

 molecular weight of, by several methods. 

 287 



n — usually a constant; order of a reaction; 

 time-dependent phenomenological pa- 

 rameter in nerve transmission theory; 

 valence change, or number of equivalents 



