1.   She was a large lady, happily married with three kids, without a chemical trace of inhibition in her body.

2.   And amazingly, to judge by chemical traces in the Isuan rocks, life on earth was already old.

3.   Because of the danger meth labs leave behind, law-enforcement officials try to remove all chemical traces, which raises the cost of a bust significantly.

4.   But, several investigators cautioned, the disclosure of the bomb-sniffing dog test does not rule out the validity of the chemical traces, either.

5.   Early in the investigation, officials found microscopic chemical traces of explosives in the wreckage, leading them to suspect a bomb.

6.   However, those conducting the briefing said that their theory will not be conclusive until chemical traces of an explosion are detected.

7.   Late Monday two federal officials said special machines had detected such chemical traces.

8.   Producing DNA matches can be tiring, tedious work that relies more on mathematics than intuition, while analyzing chemical traces for crime clues takes lots of careful study.

9.   Samples of apparent residue found on the landing gear have been sent to the FBI lab in Washington to find if they hold chemical traces of an explosive.