SUBJECT INDEX 



979 



Vitamin A (Ai) (continued) : 

 by Wilkie and DeWitt, 731 

 with enriched foods, 732 



occurrence, 675-690 

 Ai I's. As, 678-680 

 free vs. ester, 687-691 

 in egg j'olk. 687 

 in fishes, 675-677 

 in mammalian tissues. 683. 684 

 in milk, 685-687 

 in other animals, 677, 678 

 in retina, 680-683 



photomicrographs, 700 



physical properties, 726. 727 



related compounds. 733-738 



retinenei and. 681 



rhodopsin and, 681 



SbCU reaction and, 732. 733 



structure, 690-700 



stereoisomers. 627, 674. 675. 696-700 



synthesis, 713-725 

 by Arens and van Dorp. 719 

 by Fuson and Christ, 714, 715 

 by Hunter and Williams, 724 

 by Karrer et al.. 719, 720 

 by Kuhn and Morris, 715, 716 

 by Milas, 716-718. 721-723 



vitamin D and, 739, 740 

 Vitamin Ao, 674 



absorption maximum. 730 



biological activity. 695. 696 



distribution. 678-680 



extinction coefficient, 730 



from kitolo, 711 



porphyropsin and, 681 



retineneo and, 681 



structure, 691-696 



Gillam formula for, 693, 694 

 Karrer formula for, 693-695 

 Morton formula for, 693, 695 

 Vitamin As, absorption maximum, 730 

 3-r)'.s-Vitamin A, 675 



structure, 696 

 5-cis-Vitamin A, 675 



as neovitamin A, 698 



structure, 696 

 3,5-di-Ci.s-Vitamin A, 675 



structure. 696 

 Vitamin A actetate, absorption maxi- 

 mum, 730 



crystalline, photomicrographs, 672 



elimination maximum, 727 



Vitamin A acetate (continued) : 



extinction coefficients, 730 



melting point, 730 



properties, 674 

 Vitamin A acid, 704, 705 



absorption maximum, 704 



biological potency, 705 



SbCls reaction, 704 



structure, 704 



sj'nthesis, by Arens, 718. 719 

 by Milas, 721 

 by Schwarzkopf, 721, 722 

 Vitamin A alcohol 



crystalline, photomicrographs, 671 



properties, 674 

 Vitamin A aldehyde (see Retinene) 

 Vitamin Ai aldehyde (see also Retinenei) 



absorption maxima, 702, 703 



as retinenei. 701 



conversion to vitamin Ai, 701 



extinction coefficient. 702, 703 



melting point, 702 



molecular extinction curves, 703 



preparation. 701, 702 



SbCU reaction. 703 



structure, 701 



synthesis, by Ball method, 702 

 by Oppenauer reaction, 702 

 by van Dorp and Arens, 702 

 Vitamin Aa aldehyde (see also Retinene-j) 



ab-sorption maxima. 703. 704 



extinction coefficient. 704 

 Vitamin A anthraquinone-2-carboxylate. 

 absorption maximum. 730 



extinction coefficient, 730 



melting point, 698, 730 



properties, 674 

 Vitamin A epoxide, 709. 710 



structure, 709 

 ^'itamin A ester, elimination maximum. 

 727 



Isler synthesis. 717, 718 



Milas synthesis, 716-718 

 Vitamin A ethers, Milas synthesis, 722. 



723 

 Vitamin A ethyl ether, 706 

 Vitamin A methyl ether, absorption 

 maximum, 706 



biological activity, 706 



extinction coefficient, 706 



molecular extinction curve, 705 



Oroshnik synthesis, 718 



