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Effect of inorganic N (0–5%) with constant P (0.5%) treatment w/w of oil on the degradation on n-alkane (nC17, nC13, and nC25) to pristane ratios in microcosm comprising 10 g beach sediment and 125 mg North Sea crude oil. Each data point represents average value of three replicates. nC17:pristane black bars, nC13:pristane gray bars, nC25:pristane white bars.
