21.   Geologists said that Wednesday night the roving vehicle Sojourner was expected to begin its chemical analysis of a second rock, called Yogi.

22.   He hopes that further exploration, including detailed chemical analysis of the residues from nearby Stone Age campfires, will help provide an answer.

23.   In addition, the rover vehicle Sojourner has completed its chemical analysis of a rock called Yogi, the second rock on Mars to have been analyzed.

24.   It uses these computerized molecules with its proprietary chemical analysis to help pharmaceutical and biotechnology companies find promising new protein-based drug candidates for certain diseases.

25.   Jones said a chemical analysis is under way to identify the material and where it came from.

26.   Modern chemical analysis is now done automatically by a device with absorbent filters that also identifies the separated molecules by measuring their mass, velocity and charge.

27.   Now a new chemical analysis, combined with laboratory experiments on molten rock, shows that the magma may have been wetter than previously thought.

28.   On Tuesday, geologists announced the results of the first chemical analysis of a rock on Mars.

29.   One is chemical analysis of the ingredients by computerized chromatography, she said, and the other relies on the highly honed sense of smell of master perfumers.

30.   One distinctive pattern that kept showing up was later tracked by chemical analysis to an oil-burning electricity plant on Staten Island.