SUBJECT INDEX 



435 



Medium, influence on disinfection 

 tests, 256, 271, 337 



Methane from fatty acids, 77 



Methyl glyoxal in fermentations, 

 45, 47 



Methyl glyoxalase, 65 



Methylene blue as activator of 

 respiration, 99 

 reduction potential of, 88, 

 93, 95 



Milk, reductase test in, 94 

 reduction potential of, 95 



Minimum temperature of fermen- 

 tation, 133 

 growth, 157, 223 



Mitogenetic rays, 23, 34 



Molecules, arrangement of — in cell, 

 261 

 number of — fermented per 

 cell, 258 



Motility, energy required for, 34 



Multiplication of bacteria, 162, 

 189, 398 

 rate of {see Growth Rate). 



Mustard seeds, order of death, 

 275, 287 



Mutase, 65 



N 



Neutralisation heat as source of 



energy, 77 

 Neutralized cultures of strep- 

 tococci, growth in, 232 

 fermentation in, 144 

 Nitrite oxidation and nitrite con- 

 centration, 117 

 Nitrobacter, cause of suffocation 

 of, 392 

 energy utilisation by, 188 

 rate of oxidation, 117 

 Nitrogen content as measure of 

 growth, 162 

 fixation, 168, 184 

 loss of starving cells, 12, 15, 384 



Nitrogen, sources of, 168 



and yeast properties, 238 

 Nitrosomonas, rate of respiration, 

 117 

 of starving cells, 13, 17 



Old age, death by, 374 



cause of, 199, 231, 374 

 Optimum temperature of enzyme 

 action, 129 

 fermentation, 132 

 growth, 216 

 Order of death, definition, 274 

 by age, 375 

 chemicals, 339 

 light, 371 

 moist heat, 319 

 starvation, 377 384 

 X-rays, 372 

 interpretation of, 282, 293 

 summary of all experi- 

 ments on, 295 

 with very slow death 

 rates, 328 

 growth, 267 

 Oxidation, increased by methylene 

 blue, 74 

 of cells, 18, 203, 305, 385 

 of dry bacteria, 305 

 old cells, 203 

 Oxidation retarded by cyanide, 74 

 Oxidation-reduction potential (see 



Reduction Potential). 

 Oxido-reductions, 70 



definition, 45 

 Oxygen and growth rate, 209 

 activation, 44, 68 

 activators, 65 

 charcoal as, 97 

 missing in anaerobes, 64, 74 

 atoms shifted in molecule, 75 



