We have used the vanadium concentration in cleaned foraminiferal calcite as a tracer
of seawater V changes in the past. Since the benthic flux of vanadium is sensitive to the redox potential
of sediments, changes in the vanadium concentration of seawater should be a reflection of
changes that control the...
We examine the utility of the uranium (U) content of planktonic foraminifera tests as an indicator of past changes in seawater U content. The U/Ca ratio in foraminifera from Atlantic and Caribbean cores in constant in the Holocene and decreases by ~25% during the last glacial period. Magnesium/calcium (Mg/Ca) ratios...
In the United States, lead poisoning is one of the most common
childhood diseases, and children of color are disproportionately its
victims. Portland is no different.
Despite federal restrictions on lead use, many low income and children
of color in Portland continue to live, learn and play in lead
Published December 1996. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog