no 
84 
78 
72 
66 
'60 
^54 
l£ 48 
42 
36 
30 
& 
\ 
\ 
dates : 
2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 
wave length ( n m ) 
i q - 4 
Reml ESI on 
V S .1 U €■? IE- O -f the 
eubs.tr ate 
-g 
<Fig.2> by 
u s. i n g t h e ct d d :L t i or 
■} a 1 f i 11. er 5