September 21, 2009 Cover, Vol. 87, Issue 38
Digging Into Asphaltenes
Mass spectrometry uncovers chemical details of petroleum's most recalcitrant fraction. (pp. 12-17)
COVER: The Athabasca oil sands in northern Canada, pictured here, are a source of asphaltene-rich petroleum. Newscom
Copyright © 2009 American Chemical Society
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