LBL Highlights 1994-1995
ON THE COVER: Rising up like an island in the sea is the
concentration of chromium in a square millimeter of soil taken from a
polluted San Francisco Bay wetland. This computer image, generated on
the x-ray fluorescence microprobe beamline of LBL's Advanced Light
Source, shows that chromium is drawn to highly localized chemical "hot
spots" in the soil. The color scale ranges from blue, which is no
chromium, to red-orange, which is a concentration of one picogram per
micrometer. See the article, "Activating Alkanes."