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Demonstration of the repeatability of biological function between models. SCFA/BCFA production (measured by gas chromatography) in each vessel of the models inoculated with the same feces (repeatability study) was determined. Each line represents the level of an SCFA/BCFA in a single vessel of one of the two gut models of the repeatability study. The SFCA/BCFA measured were acetate (A), propionate (B), butyrate (C), isobutyrate (D), and valerate (E). T, turnover; V, vessel; M, model.
