Testing samples
Staff Sgt. Melissa Diaz visually inspect a fluid sample for traces of protein by comparing it to a control fluid sample Dec. 12 at Eielson Air Force Base, Alaska. If a protein is present, the fluid sample will turn a different color in comparison to the control sample. Sergeant Diaz is a laboratory technician assigned to the 354th Medical Group. Laboratory technicians use various methods to test for abnormalities such as bacteria for clinical diagnosis. (U.S. Air Force photo/Staff Sgt Eric T. Sheler)
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