1.   It is possible, however, that synthetic chemicals might affect the immune response in some way.

2.   Legator, who has not examined or talked to the exposed workers, said the chemical typically affects the lungs, not the brain.

3.   Rats whose thyroids were affected by chemicals before birth were less able to find their way through mazes or to tolerate stress.

4.   It is uncertain whether the chemicals used in the injection would affect his eyes.

5.   The assessment stopped short of saying there was a clear public danger, although it said there was some evidence the chemical could affect the nervous system in humans.

6.   The chemicals affected the mangrove swamps, and the center said great numbers of sea creatures, especially shrimp, were expected to die in coming weeks.