| Sampling time (h) |
0 |
0.5 |
1 |
2 |
4 |
8 |
| Levels of radioactivity |
– |
– |
+ |
+ |
+++ |
++++ |
(+): A radioactive substance (14C-labeled GlcNs) was detected in the reception-tank sample. The number of “+” symbols is proportional to the amount of radioactivity
detected.
(–): A radioactive substance was not detected in the reception tank sample. |
