188 



RADIATION BIOLOGY 



N 

 I 



o 



220 



240 



280 



300 



260 

 WAVE LENGTH, mjd 



Yu\. 5-18. Absorption speetrum of orgostorol. , ergosterol in CsHsOH; , 



crgostcrol in isooctane; X, T-dchydrtx-liolostcrol. {Ajler Hognrss et al., reproduced 

 from The AppUeation of Absorption Speelra to the Stinlii of Vitamins, Honnones and 

 Coenzymes, by R. A. Morton, 1942.) 



2200 3000 3800 



WAVE LENGTH. A 



Fig. 5-19. Absorption spectrum 

 ofequilenin. (Jones, 1948.) 



300 



500 



400 

 WAVE LENGTH, rr\ju 



Fig. 5-20. Absorption spectrum of lycopcuc with 

 varying degree of cis-lrans isomerization. I, mix- 

 tvu-e of stereoi.somers after iodine catalysis at room 

 temperature in light; II, fresh solution of the all- 

 trans compound ; III, mixture of stereoisomers after 

 refluxiiig in darkness for 45 min. {Zeehmeister, 

 1944; eopyriijht, 1944, by the Williams and Wilkins 

 Company.) 



