SUBJECT INDEX 



965 



Propionic acid (continued) : 



specific gravity, 100 



viscosity, 107 

 Propylamide, melting point, 138 

 Prop3'lgallate, antioxidant activity. 293- 



296 

 2-n-Propyl-l,4-naphthoquinone, vitamin 



K biopotency, 847 

 Propyl oleate, specific gravity, 101 

 Prostate, tocopherols in, 799 

 Protagon, 477 



Prothrombin, avitaminosis K and, 829 

 Provitamin A (see Carotenoids and 



Carotenols) 

 Provitamins D, 744-770 



conversion to vitamins D, 758-770 

 process of activation, 739, 759-762 

 chemistry of intermediates, 762-770 



occurrence, 745-748 



properties, 748, 749 



^^tructure, 749, 758 

 Psychosine, as cerebroside hydrolysis 

 product, 475 



galactosidopsychosine, 489 



glucosidopsychosine, 489 



hydrolysis, 490 



preparation, 490 



properties, 490, 491 



structure, 489, 490 

 Psychosine phosphate, 491 

 Psychosine picrate, 491 

 Psychosine sulfate, 491 

 Pufferfish liver oil, vitamins D in, 772 

 Pulasan tallow 



"association ratio" of fatty acids in, 

 218, 220 



composition, 208, 218 

 Pummelo leaves, carotenes in, 519 

 Pumpkin, cryptoxanthin in flowers, 550 



petaloxanthin in, 585, 586 



zeaxanthin ester in, 562 

 Pumpkin seed oil, composition, 199 

 Punicic acid, 53 



Purification, chromatography and, 654 

 Piuple bacteria, rhodopin in, 583 



rhodoviolascin in, 583 



spirilloxanthin in, 586 

 Putrefied fish, vitamin K in, 830 

 Pyloric caeca, perch, vitamin A in, 680 

 Pyracantha berries, carotenes in, 522, 540 



prolycopene in, 546 

 Pyrocalciferol, 787-789 

 Pyrovitamin Ds, 790 



"Quick-drying" index, 301 



Quillaic acid, in /3-amyrin group, 391 



in soap bark, 385 



interconversions, 388, 389 

 Quinone, as antioxidant, 289 

 Quinovic acid, in quinine, 385 



R 



Rabbit, random distribution in fat, 221 



rhodopsin in, 682 



tripalmitin from fat, 209 



vitamin A content, 684 

 Rabbitfish liver oil, vitamins D in, 777 

 Raccoon, liver, vitamin A in, 677 

 Radium emanation for provitamin D 



activation, 760 

 Raffia wax, 375 



Raman spectrum, fatty acids and, 82-84 

 Rambutan tallow, "association ratio'' o! 

 fatty acids in, 218, 220 



composition, 208, 218 

 Rancidity, 281-300 



antioxidants for, 288-298 



effect of metals on, 284 



hydrolytic, 283, 284 



inhibitors for, 288-298 



ketonic, 284 



oxidation, 281-283 



prooxidants causing, 299, 300 



tests for, 284-288 

 Random theory of glycerides, 223-229 

 Rapeseed oil, as semi-drying oil, 301 



"association ratio" of fatty acids in, 

 219, 220 



composition, 202, 203, 219 



constants, 236 



rate of enzyme hydrolysis, 275 



squalene in, 248 



stigmasterol in, 353 



tocopherols in, 798 

 Rat, action of vitamins Da and Da on, 

 771 



fat, composition, 192, 193 

 ergosterol in, 356 

 random distribution in, 221 



rhodopsin in, 682 



tocopherol distribution in, 799, 800 



vitamin A content, 684 

 Ratfish liver oil, vitamins D in, 772 

 Rattlesnake venom, lecithinase A in. 422 



lysocephaUn and, 445 



