656 



LATENCY TIME IN ENZYME DETERMINATION 



were due to the formula they used, I tested this formula on some 

 experiments of Bredig and von Berneck and of Senter. 



0.4343 K 



(From log • 1 

 a — x J 



0.4343 K 

 a — x„ 



(From log • I 

 a — x J 



Values of K obtained (Bredig and von Berneckf). 



* Bredig, G., and von Berneck, R. M., Z. physikal. Chem., 1899, xxxi, 291. 

 t Bredig, G., and von Berneck, R. M., Z. physikal. Chem., 1899, xxxi, 297. 

 J Senter, G., Z. physikal. Chem., 1903, xxliv, 280. 



It is obvious that the formula K = 



1 



In 



a—Xo 



gives a constant 



t — Iq d — X 



K. There certainly are cases in which the use of this formula does not 

 prevent the increase of reaction velocities; e.g., the inversion of cane- 

 sugar.^ But I am inclined to beheve that in most of the cases with 

 catalase this increase was due to the properties of the formula with 

 which the results were calculated. 



® Henri, V., Z. physikal. Chem., 1902, xxxix, 194. 



