488 



INDEX 



Haptens, 406 



— combination with antibodies, 442, 



452, 458 



— complex, 442,- 458 



— simple, 442, 452 



" Heavy " carbon, as tracer element, 



247, 256 

 Helminthosporin, 64, 395 

 Helminthosporium avence, 395 

 antibiotic from, 185 



— catenariiim, 395 



— cynodontis, 395 

 • — euchlance, 395 



— geniculatum, 303 



— gramineum, 64, 395 



— leersii, 396 



— ravenelli, 395, 396 



— tritici-vulgaris, 395 



— turcicum, 395, 396 

 Helvolic acid, 162, 167 

 Hemipyocyanin, 178, 179 

 Heparin, 50 

 Heterobiotin, 104 

 Heterotrophic bacteria, 80 et seq. 

 Hexacosanoic acid, 374, 375 

 Hexadecenoic acid, 371 

 Hexose diphosphate, 320 

 Hexose monophosphate, 266 

 Hexose monophosphorylase, 212 

 Hexose phosphates, 264 

 Histamine, antisera to, 417 



— as determinant group, 416 

 Histidine, 216, 405 



— deamination, 230, 237 

 Histone, bacteriostatic action, 185 

 Holozymase, 269 



Hyaluronic acid, 358 

 Hyaluronidase, 358 



— in CI. welchii, 95 

 Hydrogenase, 212 



— in nitrogen fixation, 224 

 Hydrogen bacteria, 70, 74, 207 



— donators, 194, 208 



activation of, 194, 208 



inhibition of, 196 



mechanism, 195 



— electrode, 11, 12 



— ions, acidity due to, 7 



concentration in acetic acid, 7 



in hydrochloric acid, 7 



Hydrogen ions, concentration in 



water, 7 

 measurement of, colori- 



metric, 13 et seq. 

 electrometric, 11 et 



seq. 



in water, 6 



Hydrogenlyase, 94, 212, 260 

 Hydrogenomonas , 70 



— metabolism of, 74 



Hydrogen peroxide in bacterial res- 

 piration, 198 et seq. 



— production from cellulose, 323 

 from formic acid, 249 



— sulphide, activation of papain, 48 

 oxidation by sulphur bacteria, 



72, 73 



— transportase, 197 

 Hydrolases, 52, 188 

 ^-Hydroxybenzoic acid, 232 

 Hydroxy-emodin, 395 

 Hydroxylamine in nitrogen metabol- 

 ism, 223 



Hydroxyl ions, alkalinity due to, 7 



concentration in water, 7 



in water, 6 



2 - Hydroxymethyl - 5 - carboxyfurane, 



288 

 a-Hydroxyphenazine, 391 

 2)-Hydroxyphenyl-lactic acid, 229 

 /-Hydroxyproline, 218 

 Hypoxanthine, 219, 336 



Iminazole-acrylic acid, 230 

 Indicators of oxidation-reduction, 23, 

 24 



— of^pH, 13, 14 



Congo-red, 14 



litmus, 14 



methyl orange, 13 



phenolphthalein, 14 



ranges of, 15 



Indole -acrylic acid, antibacterial ac- 

 tion, 147 

 Indole in tryptophane synthesis, 343 



— from tryptophane, 209, 233 

 Indole-carboxylic acid, 232 

 Indole-lactic acid, 229 

 Indole-propionic acid, 228 

 Influenza bacillus, see H. influenzie 



