Fig. 4From: Effects of Clostridium butyricum on growth performance, metabonomics and intestinal microbial differences of weaned pigletsPartial least squares discriminant analysis (PLS-DA) and orthogonal partial least-squares discriminant analysis (OPLS-DA) two-dimensional score plots of fecal metabolites in comparisons of the NC and CB groups following (a), (b) positive and (c), (d) negative mode ionizationBack to article page