278 



INDEX. 



Propeptone, 43 

 Propionic acid, 117, 124 

 Protagou, 137 

 Protallmmose, 44 

 Proteids, 6-53 



composition of, 5, 50-51 

 crystalline, 6 

 ash of, 6 



general reactions of, 7 

 classification of, 9 

 coagulated, 10, 35 

 digestive changes of, 37, 38 

 duplexity of molecule of, 38 

 their decomposition by acids, 



40, 50 

 ,, products of decomposition of, 



49 

 ,, theories of the constitution of, 



51 



' Protein ' described by Mulder, 19 

 Protogelatose, 82 

 Pseudoxati thin, 207 

 Ptomaines, the, 204-207 



,, their similarity to vegetable 



alkaloids, 204, 205 

 Ptyalin, preparations of, 56 



,, its action on starch, 57 

 Purple, visual-, 261, 264 

 Pus-cells, nuclein prepared from, 88 

 Pus-corpuscles, presence of glycogen in, 



96 



Putrefactive organisms, action on cellu- 

 lose of, 100 

 Putrescin, 206 

 Pyocyanin, 268 

 Pyoxanthose, 268 

 Pyrocatechin, 196 



Kennet, use of, in cheese-making, 65 

 Kennin, its clotting action on milk, 22, 



66 



its enzymic nature, 65 

 Renninogen, 66 



Retina, pigments of the, 260-265 

 Rhodophane, 261, 263 

 Rhodopsin, 261, 264 

 Rotation of light, mode of measurement 

 of, 103 



Saccharic acid, its connection with gly- 

 cnronic acid, 107 



Saccharose, 110 



Saliva, ptyalin a constituent of, 57 

 mucin a constituent of, 76 

 ,, its action on starch-paste, 111 

 ,, presence of sulpho-cyanates in, 

 163 



Salkowski-Ludwig method, estimation of 

 uric acid by the, 167 



Sarcolactic, or paralactic acid, 126, 127 



Sarkin, 180 



Sarkosin, 140 



Scherer's test for nosit, 109 



SchifFs reaction for uric acid, 167 



Schultze's reagent for cellulose, 100, 



note 

 Schweizer's reagent, preparation of, 99, 



note 



Seidel's reaction for inosit, 110 

 Serum albumin, chemistry of, 12 



,, preparation of, 14 



Serum-casein, 27, note 

 Serum-globulin, 27 

 Serum-lutein, 266 

 Skatol, its combination with glycuronic 



acid, 107 



,, preparations of, 201 

 ,, reactions of, 202 

 ,, occurrence of, in a vegetable tis- 

 sue, 203 



,, compounds of, 258 

 Skatoxyl-pigments, 259 

 Skatoxyl-sulphuric acid, 202 

 Snake's eggs, elastin-like substance in, 86 

 Soaps, formation of, with stearic and 



palmitic acids, 119 

 ,, composition of, 124 

 Soda, sulphindigotate of, 200 

 Soluble starch, preparation of, 92 

 Spectrophotometers, 225 

 Spectrophotometry, 224 

 Spermaceti, cetvl-alcohol obtained from, 



116 



Spermin, 139 



Spleen, presence of inosit in the, 108 

 disintegration of red corpuscles in 



the, 250 



Starch, hydrolysis of, by ptyalin, 57 

 ,, ,, by pancreatic secre- 



tion, 57 



-, sources of, 91 

 ,, molecule of, 92 

 soluble, 92 



,, digestion of, artificial and nor- 

 mal, 94 

 ,, its conversion into sugar in the 



body, 94-95 



Starch group of the carbohydrates, 91 

 Starch -paste, action of saliva on, 111 

 Stearic acid, 119 



Stearin (tri-stearin), preparation of, 121 

 Strecker's test for xanthin, 176 

 Strom a of red blood-corpuscles, proteid 



constituent of, 28 



Sub-maxillary gland, mucin of the, 77 

 Succinic acid, 131 

 Sugar in blood, determination of, 8 

 ,, conversion of hepatic glycogen in- 

 to, 58, 98 

 ,, diabetic, 98 

 Sugars, the, chemistry of, 101 

 artificial, 102 

 ,, discrimination of, 102 

 Sulphindigotate of soda, 200 

 Sulpho-cyanic acid, its formation in the 



body, 163 



Sulphur, a constituent of fibrin, 34 

 ,, its presence in lardacein, 48 



