Phenolic Solutions by Seeds of Hordeum vulgare. 127 



'08 



v. 



«§ 



so 



t 



)'CZ 







V s - 















\o 





D/AC 



•RAM / 



V. 































JO 



5-5 



6-0 



6 'J 



7"5 



8'5 



In the case of every solution studied, there is evidently a straight line 

 relationship existing between the absorption rate and the degree of fulness. 

 The rate of entry at any given time is therefore given by an equation of the 

 type 



dx/dt = k(a—x), 



where 



dx/dt = rate of increase in weight (in grammes per hour) when the seeds 

 have attained the weight x ; 

 x = weight of the seeds after the interval t ; 

 a = weight of the seeds at equilibrium ; 



h = a constant for the solution at the given temperature and concentra- 

 tion. 



The values of the constants k and a are given in Table VI. 



Table VI. 





Temp. 19° C 



Temp. 32 "2° C. 





Jc. 



a. 



k. 



a. 



(a) 



N/2 phenol 



N/2 catechol 



N/2 quinol 



Seminormal 



0-024 

 047 

 0-029 

 0-026 

 0-026 

 0-024 



Phenolic Sc 



grm. 

 7-34 

 7 -50 

 7-42 

 7-37 

 7 37 

 7 34 



lutions. 



0-045 

 0-076 

 0-055 

 0-052 

 0-052 

 0-045 



grm. 



8- 7 



9- 4 

 8-9 

 8-8 

 8-8 

 8-7 



