Zonnebloem 



206 



Zonnebloem: see Sunflower. 

 Zoochlorellae : compared with the bac- 

 teroids of root nodules, II. 305, 312. 



— cultivation, II. 304, 306-309. 



— description, in the animal body, II. 

 233, 305. 



— relation between Chlorella vulgaris 

 and the — of Hydra viridis and Para- 

 maecium hursaria, II. 229-233, 304- 

 311; III. 22; V. 288. 



Zoogloea, III. 68, 75, 91; IV. 57, 337; V. 



53, 58, 107, 150; VI. 71. 

 Zuckerrohr: see Sugar cane. 

 Zuurdeeg: see Leaven. 

 Zuursel: see Starter. 



Zuurwekkers : see Starter. 

 Zweefvlieg: see Hoverfly. 

 Zymase: III. 64; V. 165, 206, 220-227, 

 251, 254. 



— constitution, dialysis experiments, 

 diffusion, V. 225-227. 



— identity with the genes of the alcohol 

 function, V. 226, 254. 



— secretion by yeast cells as a necrobiotic 

 process, V. 165, 220-227, 251. 



Zymogens, identity with protoplasm, 



III. 268. 

 Zymoglucase: III. 135, 152, 153, 268, 269. 



— destructive temperature, III. 153. 



— preparation, III. 269. 



