932 



SUBJECT INDEX 



2,3-Dimethyl-l,4-naphthoquinone, vita- 

 min E biopotency, 826 

 vitamin K biopotency, 846 

 2,5-Dimethyl-l,4-naphtlioquinone, vita- 

 min K biopotency, 849 

 2,6-Dimethyl-l,4-naphthoquinone, vita- 

 min K biopotency, 849 

 2,7-Dimethyl-l,4-naphthoquinone, vita- 

 min K biopotency, 849 

 2,8-DimethyI-l,4-naphthoquinone, vita- 

 min K biopotency, 849 

 6,7-Dimethyl-l,4-naphthoquinone, vita- 

 min K biopotency, 849 

 2,3-Dimethyl-l,4-naphthoquinone oxide, 



vitamin K biopotency, 852 

 2,7-Dimethyl-l,4-naphthoquinone oxide, 



vitamin K biopotency, 852 

 2,2-Dimethyloctadecanoic acid, 55 

 2,6-Dimethyl-3-phytyl-l,4-naphthoqui- 

 none, vitamin K biopotency, 849 

 a,a-Dimethylsuccinic acid, from capsan- 

 thin, 576 

 from ^-carotene, 515 

 from lutein and zeaxanthin, 554 

 from vitamin A2, 695 

 2,3-Dimethyl-5,6,7,8-tetrahydro-l,4-dioxy- 



naphthalene, vitamin E action, 826 

 5,8-Dimethyltocol (see ^-Tocopherol) 

 7,8-Dimethyltocol (see y-T ocopherol) 

 Dimethyl zeaxanthin ether, 564 

 Dimorphism in alcohols, 316, 317 

 1 ,2-Dimyristin, melting point, 266 

 1.3-Dimyristin, melting point, 264 

 1,3-Diolein, constants, 264 

 Dioleolecithin, 426 

 1,2-Dipalmitin, constants, 266 

 1,3-Dipalmitin, constants, 264 

 Dipalmitolecithin, hydrolecithin as, 439 

 0-Dipalmityllignocerylsphingosine, 465 

 1,3-Dipentadecanoin, melting points, 264 

 Diphosphoinositide, brain, 452, 453 

 2,2-Dipropylchroraan, vitamin E biopo- 

 tency, 823 

 1,2-Distearin, constants, 266 

 1,3-Distearin, melting points, 264 

 0-Distearyllignocerylsphingosine, 465 

 a,a'-Distearylplasmalogen, 472 

 a,/3-Distearj'lplasmalogen, 472 

 1,3-Ditridecanoin, melting points, 264 

 1,3-Diundecanoin, melting points, 264 

 Divitamin A succinate, absorption maxi- 

 mum, 730 



Divitamin A succinate {continued) : 



crystalline, photomicrographs, 672 



extinction, 730 



melting point, 730 



properties, 674 

 3,5-Di-czs-vitamin A, 675 

 Dock, leaves, carotenes in, 520 

 Docosanedioic acid in Japan wax, 380 

 Docosanonitrile, melting point, 142 

 n-Docosanol (see Behenyl alcohol) 

 4,8,12, 15,19-Docosapentaenoic acid (see 



Clupanodonic acid) 

 11-Docosenoic acid (see Cetoleic acid) 

 13-Docosenoic acid (see Erucic acid) 

 1-Docosenol from erucic acid, 315 

 cis-13-Docosenol (see Erucyl alcohol) 

 Dodder, a- and /3-carotenes in, 518 



7-carotenes in, 540 



lycopene in, 545 



phytofluene in, 663 



rubixanthin in, 553 

 Dodecanoic acid (see Laurie acid) 

 7!-Dodecanol (see Lauryl alcohol) 

 4-Dodecenoic acid (see Linderic acid) 

 5-Dodecenoic acid (see Lauroleic acid) 

 9-Dodecenoic acid, discovery, 14 



physical constants, 46 

 11-Dodecenol, constants, 310 

 2-Dodecyl-2,5,7,8-tetramethyl-6-oxychro- 



man, biopotency, 822 

 Dog, rhodopsin in, 682 



vitamin A content, 684 

 Dog fat, effect of diet on composition, 



235 

 Dog-fish liver oil, cholesterol in, 326 



kitol in, 710 



vitamins D in, 772 



vitamin D3 in, 776 

 Dog rose, /3-carotene in, 523 



lycopene in, 544 



phytofluene in, 662 



rubixanthin in, 552 



taraxanthin in, 570 



zeaxanthin in, 562 

 Dolphin oil, Reichert Meissl value, 246 

 Dotriacontanoic acid (see Lacceroic acid) 

 n-Dotriacontanol (see n-Lacceryl alcohol) 

 Douglas fir bark wax, 379 

 Dragontree leaves, carotenes in, 519 

 Drummond-Watson reaction for vitamin 



A, 668 

 Drying oils, iodine number and, 244 



