Chemical Sciences Division, E. O. Lawrence Berkeley National Laboratory, and Department of Chemical Engineering, University of California, Berkeley, California 94720-1462 Article Views are the COUNTER ...

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1991; Rzama et al., 1995) but the solvents were changed. In the published works, the hydrocarbons were eluted with pentane, the polar fractions were eluted with diethyl ether followed by a solution of ...