The resins and asphaltenes of three heavy oils differing in origin (Permian and Carboniferous) and vanadium content (0.025–0.165 wt %) have been studied as sources for isolation of spectrally pure… Click to show full abstract
The resins and asphaltenes of three heavy oils differing in origin (Permian and Carboniferous) and vanadium content (0.025–0.165 wt %) have been studied as sources for isolation of spectrally pure ...
               
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