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Pretreatment of Fuller's earth with nitrogen.
N'cho JS, Fofana I, Beroual A. N'cho JS, et al. Heliyon. 2020 Mar 27;6(3):e03643. doi: 10.1016/j.heliyon.2020.e03643. eCollection 2020 Mar. Heliyon. 2020. PMID: 32258486 Free PMC article.