Large image view: Tracing marijuana to its roots

[Photo: Read caption below]
草榴社区 photo by Marmian Grimes

Tim Howe, a research technician at the 草榴社区 Stable Isotope Facility, demonstrates how to load sample capsules into an autosampler tray. The samples are then combusted for testing in a stable isotope ratio mass spectrometer.


Return to feature story

Return to 2007 feature story archives

Photo/video policy