Ind 



ex 



623 



Peroxidase, 333, 341-344, 535 



diffusion studies, 416—417 



reaction with ascorbic acid, 342, 535 



reaction with cytochrome c, 342, 578-580 

 Peroxidatic reaction, 333 

 Phage, 246 



genetics, 256—260 



life cycle, 255 



r-type plaque, 257 



studied by bacteriological methods. 

 248-251 



studied by electron microscope, 251—252 



T series of E. coliphages, 247 



vegetative stage, 254 



wild-type plaque, 257 

 Phase, 592 

 Phase angle, 592 

 Phenylalanine, 275 

 Phon, 10 

 Phonons, 18 

 Phospholipid, 270 

 P32, 566-567 

 Photoisomerase, 319, 355 

 Photometer, 483 

 Photon : 



emission or absorption, 507 

 Photopic vision, 46-48 

 Photopigment, 351—352 

 Photosynthesis, 360-379 



basic chemistry, 364—367 



C0 2 conversion, 364-365 



charge separation, 375 



efficiency, 376 



free radicals in, 375—376, 381 



light reaction, 373—377 



path of carbon, 368-370, 381 



photodissociation of water, 365—366 



pigments, 370—372 



reactions within the chloroplast, 367 

 Photosynthetic phosphorylation, 366-367, 



381 

 Phycobilin, 370-372 

 Physical microbiology, 183—263 

 7r-electron, 334, 520-523 

 Pile unit, 188 

 Pinna, 19 

 Pitch, 5 



Planck's constant, 18, 503 

 Plane wave, 592 

 Plaque, 250 

 Plastid, 362-363 

 Pneumoencephalograph, 100 

 PN+, PNH, 347, 366 (see DPN and TPN) 

 Poisson probability distribution, 44 

 Polarized light: 



role in vision, 65 

 Polarizer, 548 

 Polyethylene, 301, 303 

 Polyisobutylene, 301, 304 

 Polymer, 267, 300-302 



synthetic: 



radiation damage, 302—305, 381 

 Polymethylene, 304 

 Polypeptide, 273 

 Porphyrin, 333—334 



Porphyropsin, 358 



Positive after-potential, 80, 81 



Positron. 612 



Potential energy, 1 59 



Pressure : 



absolute, 158 



acoustic, 5 (see Acoustic pressure) 



Pressure amplification, 20, 23 



Pressure, gauge, 1 58 



Principal, p, 518 



Principal plane, 602 



Principal points, 30, 602 



Proline, 277 



Prophage, 254 



Prophase, 189-190 



Proportional counter, 560 



Proprioception, 52, 96, 146 



Prosthetic group, 320 



Protanopia, 122, 128 



Protein, 268-269, 271-277, 286-292, 



300-302 

 ' structure, 286 



a-form, 152, 287 

 a-helix, 288-292 

 /3-form, 152, 287 

 fibrous proteins, 287—289 

 information theory, 471—473 



Protein gels, 240 



Proton, 185, 612 



Protoplasm, 267 



Protoporphyrin, 334, 564, 569 



Pulse, 182 



Purine, 278 



Purkinje fibers, 170 



Pyridine nucleotide, 347, 366 (see also 

 DPN, TPN) 



Pyrimidine, 278 



Q 



Qio, 407 



Quality of sound, 5 



Quanta, 33, 502 



Quantum mechanics, 33—34, 501—524 



elementary approach, 502—509 

 Quantum number, 506 

 atomic, 517—520 

 atomic one-electron: 

 mi, rru, and mj, 517 

 orbital, 1, 517 

 spin, s, 517 



total angular momentum, j, 517 

 total, n, 517 

 molecular: 



electronic, various, 520—521 

 rotational, 510—511 

 table of symbols, 521 

 vibrational, 512—513 

 X-ray terminology, 519 

 Quantization, 503, 509 

 Quasi-static approximation, 325 



R 



Rad, 187 



Radiations (table), 611 



