Fig. 5. The m-XAFS spectra of three zinc sources (ZnSO4, ZnMet,ZnLys) in the duodenal wall specific region. The m-XAFS spectra were basically the same. The shapes of the former absorption curves and curves behind the absorption peak were similar for the three zinc sources. Zinc K-edge absorption values for organic zinc(ZnMet,ZnLys) samples were greater than ZnSO4 sample.