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Concentrations of short-chain fatty acids (SCFA) in fresh colonic contents after supplementation with different doses of XOS in pigs at different stages of development. a Scatter plot of SCFA concentration. b Scatter plot of 1,7-heptane diamine concentration. *P < 0.05; **P < 0.01. The straight-chain fatty acids = acetate + propionate + butyrate + pentanoate; the total short-chain fatty acids = straight-chain fatty acids + isobutyrate + isopentanoate
