In the soil microbiology lab, ERDC Cold Regions Research and Engineering Laboratory (CRREL) Scientist David Ringelberg instructs a Job Shadow student on the use of a mass spectrometer, a piece of equipment that helps scientists determine the composition of certain compounds.

Download Image: Full Size (0.03 MB)
Photo by: U.S. Army Corps of Engineers |  VIRIN: 120522-A-FW529-011.JPG