132 S. R. Pelc 



(d) Linear increase or decrease of concentration with 

 time: — 



f(T) = a+bT 



Bk 



fort=T:d = ,^^^-^3^j (2at+bt2) reps (29) 



(e) Exponential increase or decrease with time: — 



f(T):=be" 



Rk 



d~, (e^-'-l) reps (30) 



Rk 



forT=t:d= — (l-e-*^*) reps (31) 



a 



(/) f(r)=b(l-e-") 



T?k 



^== a(l-e-°t) (aT+e-°T-i) reps (32) 



for t = T: d=Bk ( _^ _^^ - i) reps (33) 



(^) Concentration increasing at first and then decreasing 

 through excretion, etc., similar to Fig. 1. 



f(t)=bTe- 



1_ n — p-aT — p-aT 



a^te" 



Bk 

 d=-S7lS (l-e-T-e-TaT) reps (34) 



Bk 



for T=t: d=:-^ (C^t.j.^t) reps (35) 



a^t 



forT=oo:d=:^^ reps (36) 



a-^t 



