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Acrylamide levels in Arabica and Robusta Se-coffee (pretreated with selenium), positive control (pretreated without selenium), and negative control (untreated) roasted via conventional (CON) and superheated steam (SHS) roasting. Lowercase letter, uppercase letter, and star symbol represent significant differences (p < 0.05) between different treatments for Arabica, Robusta coffees, and significant differences (p < 0.05) between the coffee varieties, respectively.
