SUBJECT INDEX 



1265 



X rays, transition effect, 111 



translocations induced by, 484, 487 

 (See also Chromosome aberrations; 

 Mutations; Radiation; X radia- 

 tion) 



Yeasts, 321, 324, 325, 331-332, 445, 595, 

 940 



diploid, 303, 321, 324 



haploid, 302, 303, 321, 324 



hexokinase, 298 



Sac char omyces cerevisiae, 304, 325 

 Yttrium, radioactive, 586 

 Yttrium 90 colloid, 978 



Yttrium 91 , effect of, on bone, 1110, 1112 

 on intestine, 1127 

 on liver, 1128 



on peripheral blood, 1058, 1059 

 on skin, 1122 

 on spleen, 1107 

 on testis, 1117 

 on thymus, 1105 



Zr 93 -Cb 93 (Zr 95 -Nb 96 ), effect of, on intes- 

 tine, 1127 



on spleen, 1107 



on testis, 1117 

 "Zone sensible," 301 



