220 



ESSENTIALS OF CHEMICAL PHYSIOLOGY 



X 



Xanthine, 30, 61, 87, 121, 122 

 Xanthine group, 30, 121 

 Xanthoproteic test, 19, 44 



Yeast, action ol, 11, 12, 13 ; cells, 47 ; 

 in bread-making, 41 ; in testing for 

 sugar, 11, 132 



Yvon on removal of creatinine and 

 urates, 167 



Z 



Zbiss' polarimeter, 192 

 Zinc chloride creatinine, 124, 175 

 Zuntz's gas apparatus 198 

 Zymogen, 55, 87 granules, 150 



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