966 



SUBJECT INDEX 



Ravison seed oil, composition, 203 

 Rayleigh scattering, 82 

 a-, /3-, and 7- Rays for provitamin D ac- 

 tivation, 760 

 Red beech bark wax, 379 

 Red-berry bryonia oil, n-eicosane in, 403 

 Red-berry bryony, lycopene in, 544 

 Red clover, lutein in, 556 

 Red euglene, a-carotene in, 535 

 Red grouper liver oil, vitamin A in, 676 

 Red-gum eucalyptus wax, 378 

 Red pepper, /3-carotene in, 523 

 Red-o-quinone, vitamin E action, 825, 



826 

 Red snapper liver oil, vitamin A in, 676 

 Redwood leaves, carotenes in, 519 

 Refractive index 



definition, 239 



of carotenoids, 603 



of common fats, 236 



of diglycerides, 264, 265 



of hydroxy acids, 48 



of monoethenoid acids, 46 



of monoglycerides, 268 



of polyethenoid acids, 47 



of saturated fatty acids, 45, 103, 104 



of saturated monatomic alcohols, 307 



of symmetrical mixed triglycerides, 

 256, 257 



of unsaturated monatomic alcohols, 

 310 



of unsymmetrical mixed triglycerides, 

 261, 262 



relation to iodine number, 239, 240 



relation to melting point, 240 

 Rehydrovitamin A, 736-738 



molecular extinction curve, 737 



structure, 737 

 Reichert-Meissl niunber, of common fats, 

 236 



definition, 245 



discussion, 245, 246 

 Reindeer fat, composition, 193 

 Retina, astacene in, 588 



astaxanthin in, 591 



cerebrosides in, 474 



porphyropsin and, 681-683 



retinene i and 2 in, 681, 701 



ihodopsin and, 680, 682, 683 



vitamin A aldehyde in, 701 

 Retinene, SbCla reaction, 680 

 Retinenei, rhodopsin and, 681 



vitamin Ai aldehyde and, 701 

 Retiuenea, porphyropsin and, 681 



Rhizome waxes, 379 

 Rhodopin, 583, 584, 680 



absorption spectra, 611 



in catadromous fishes, 682, 683 



properties, 605 



replacement by porph.vropsin, 682 

 Rhodopurpurin, 584 



absorption spectra, 611 

 Rhodovibrin, 584 

 Rhodoviolascin, 583 



absorption spectra, 611 



possible stereoisomers, 627 



properties, 605 

 Rhodoxanthin, 573-575 



absorption spectra, 611 



adsorption order, 660 



possible stereoisomers, 627 



properties, 605 

 Rice bran, v^itamin Ki in, 831 

 Rice bran oil, stigmasterol in, 353 



tocopherols in, 798 

 Rice germ oil, gadusene in, 402 

 Ricinoleic acid, absorption spectrum. 80 



content in fat, 201-203 



discovery, 29 



interfacial tension. 106 



occurrence, 30, 31 



oxidation, 157 



physical constants, 48 



surface tension, 106 

 Rickets, experimental ])ru(lucti(jn. 740 



sunlight and, 740 



therapeutic effect of ultraviolet light, 

 759 



vitamins D and, 740 

 Riebeck-parafhn fat, 176 

 Rocket salad oil, composition, 203 

 Rockfish liver oil, \itamins D in, 772 

 Roman method for choHne. 430 

 Root waxes, 379 

 Rose hips, lutein in. 55S 



lycopene in, 544 



taraxanthin in, 570 



tocopherols in, 797 



zeaxanthin in, 562 

 Rosenheim nietliod for cprebiosides, 



478-480 

 Rosenheim and Tebb method lor sphin- 

 gomyelin pieparation, 456 

 Rosinweed flowers, helenien in. 559 



physalien in^ 559 

 Rowanberries, carotenes in, 522 

 vitamin Ki in, 832 



