INDEX 



325 



Chromogens, artificial, 235-239 

 benzidine, 219, 237, 253, 262 

 p-cresol, 237 

 of Dioscorea, 274 

 guaiacum resin, 221, 228 

 hydroquinone, 221 

 malachite green, leucobase of, 



238 

 a-naphthol, 222, 237, 253, 



262 



natural, 232, 250, 300 

 phenolphthalin, 238 

 p-phenylenediamine, 236 

 of Primula sinensis, 254 

 pyrogallol, 239, 245-248 

 respiratory, 252, 280, 291 

 ?M-toluidine, 238 

 tyrosine, 221, 237 



Clarification of solutions: 

 by alumina cream, 42 

 by basic lead acetate, 37, 41, 



46 

 by kieselguhr, 42 



Cyanidin (see also Anthocyanin) : 

 from cornflower, 252 

 from cranberry, 271, 272 

 from quercetin, 252, 272 

 from Rosa gallica, 271, 272 



Enzymes: 



catalase, 56 



diastase, of leaves, 4-6 



inhibition of by tannin, 5 



of roots, 14 



action on Floridean starch, 

 56 



in red algae, 57 

 emulsin, 15 

 inulase, 15 



invertase, 15, 35, 40, 44 

 maltase, 15, 45, 53, 207 

 oxidase, 216-267, 293-302 

 pectase, 63-73 

 pectinase, 64 

 pectosinase, 64 

 peroxidase, 219-229, 232, 



252, 260-267 



phenolases, 218-224, 233-249 

 respiratory, 12, 291 

 taka-diastase, 46, 53 

 trehalase, 58 



Enzymes : 



tyrosinase, 218, 224-227, 233, 



237, 240 

 zymase, 91, 291 



Electrical conductivity : 

 of dead tissues, 113 

 of living tissues, 112-116 

 of pectin solutions, 67 

 of sap of leaves, etc., 118, 154- 



169, 189 



of secretions, 96-98 

 of standard solution, 149 

 of transpiration stream, 188- 



198 

 of yeast sap, 87-90, 96 



Evaporation, specific, 173 



Flavone, 251-253, 291 

 Formaldehyde, as source of starch, 2 

 reaction with tannin, 275, 276 

 Fucosan, 54, 230 



Guaiacum resin: 



reagent for copper, 250 

 for oxidases, 221, 228 



Hsematokrit, 94, 240 



Hydrogen cyanide, as inhibitor, 



231, 258 

 effect on inhibitor, 227, 232, 



254, 267 



Hydrogen peroxide, 219, 220 

 Hydrometer, ecological studies 

 with, 174 



Inhibition: 



of animal tissues, 137 



of dry seeds, 106, 140-146 



of egg, 139 



force of, 145 



of muscular tissue, 130 



of protoplasm, 106 

 Inhibitors, 227-233 



of dominant whites, 255 



Lipoids, 101, 135 

 Luteolin : 



in Antirrhinum varieties, 270 



isomerism with cyanidin, 273 



reduction of, 278 



structure of, 268 



