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. 2017 Mar 16;3(3):e00269. doi: 10.1016/j.heliyon.2017.e00269

Fig. 7.

Fig. 7

Ratios of nC17/pristane (left) and nC18/phytane (right) over 28 days of laboratory microcosm weathering using the four experimental oil treatments (OAS, OASD, ON, and OND).