324 



INDEX 



Crick, on coding theory, 154 

 Cross-stimulation of neural networks, 277 

 Curie, as unit of radioactivity, 1 13 



Mme. Marie and Pierre, 102 

 Current, electronic, in certain organics, 

 74, 147 



factors of, 219-222 



in active membranes, 270-271 



ionic, in salt solutions and tissues, 219 

 Curtis, on nerve propagation, 264 

 Cybernetics, 295 ff 

 Cytosine, 149 



d — infinitesimal amount of, or full differen- 

 tial symbol; distance; lattice spacing; 

 deuteron 

 D — depth (ft) in water; diffusion coefficient; 



radiation dose; reaction product 

 Do — integrated beta dose to tissue 

 db — number of decibels (10 db = 1 b); 



definition, 55 

 de Broglie's pilot waves, 72 

 Debye-Hiickel theory of electrolytes, 219 

 Decay {See Radioactive decay) 

 Delta, a symbol: A, meaning "a change in" 

 Delta waves in EEG, 275 

 Depth perception, 91 

 Derivative, full and partial, 16 

 Desoxyribosenucleic acid (DNA) 



chemical composition of, 133, 148, 149 



coding in {See-Codes) 



helical structure of, 133, 148, 150 



molecular weight of, 139, 150 



physical properties of, 129, 148 



pyrimidine and purine bases in, 149 

 Detection of ionizing radiations, 107 ff 



by fluorescence, 109 



by induced chemical reactions, 1 1 1 



by ionization of a gas, 107 



by photography, 107, 108 

 Deuteron, ionization by, 104 



penetration of, 116-118 



physical properties of, 103, 104-105 

 Deviations, standard, and others, 19-20 

 Diastolic pressure, 35 

 Diathermy by infrared, 82-83 

 Diffusion, 6, 207 ff 



as a rate process, 210 



driving force for, 211, 228-229 



effect of ionizing radiations on, 245 



Fick's laws of, 208-209, 228 



of water: osmosis, 142, 212 



w fluid flow, 214 

 Diffusion coefficient, definition of, 208 



factors of, 210, 231 



table of values, 210 



Diffusion potential, 186 



Dipoles, induced and permanent, 41 



in chemical bonds, 41-42 



interaction of, 42-43 

 Disc, intervertebral, strain on, 34 

 Disintegration, radioactive (See Radioactive 



decay) 

 Donnan, on membrane selectivity, 187, 267 

 Dosimetry, radiation, 107-1 11, 238-241 



electrochemical, 240 



fluorescence, 240 



Fricke ferrous sulfate, 239 



in gases, 107-1 1 1 

 Doty, on macromolecules, 135, 136, 139 

 Dunn-Fry law, 64 



e — base of natural logarithms, 2.71828 

 e + , e~ — positive and negative electrons 

 E — enzyme ([E] = concentration of enzyme); 



reversible electromotive force 

 Eq — emf of standard state 

 E* — energy of activation 

 ^difl — diffusion potential 

 E conc — concentration potential 

 E m7 — midpoint potential 

 £— efficiency, AF'/AF 

 Ear, bones in, 57 



detection by inner, 56-58 



external, 57 



membranes of cochlea, 58 



middle, amplifying action of, 57 



sensitivity, absolute of, 50, 51, 56 



theory of hearing, and, 57 

 Edema and water balance, 37-38 

 Efficiency, £ = AF'/A/-', 169 



in muscular contraction, 171 



of metabolic processes, 171-173 

 Elastic modulus, definition, 34 



of bone, 34 

 Elastic reactance, and sound absorption, 53 

 Elasticity of bone, 34 



of capillary walls, 35 



of cell membranes, 37-38 



of muscle tissue, 278-279 

 Electric potential, definition of, 38 



and free energy of reaction, 180 



electrodes for the measurement of, 264 



electromotive series of, for biological 

 systems, 180 



measured against the normal hydrogen 

 electrode (NHE), 180 



membrane, values of, 187 



midpoint, E m7 , 180, 181, 183 



of concentration cells, 186, 187,267-268 



theory, 180-182,270-271 

 Electric shock, damage from, 222 



