01557nas a2200205   4500008004100000245015100041210006900192300001400261490000700275520085700282653001501139653001801154653002001172653003501192100001701227700002101244700002001265700001801285856004801303       2009                        eng d00aNon-linear Relationship Between Bulk d13C and Percent Maize in Carbonized Cooking Residues and the Potential of False-negatives in Detecting Maize0 aNonlinear Relationship Between Bulk d13C and Percent Maize in Ca  a2206-22120 v363 a<p>Bulk δ<sup>13</sup>C values on charred cooking residues adhering to pottery sherd interior surfaces have been used as a source of information on the histories of maize in various locations in the western hemisphere. This approach is based on an assumption of a linear relationship between the percent maize in the resource mix cooked in a pot and δ<sup>13</sup>C. Previous experiments suggest that this relationship is non-linear, and maize may not be identified from bulk δ<sup>13</sup>C values even when it contributed substantially to the resource mix. A second round of experiments, presented here, indicates that the mobilization of carbon from maize and C<sub>3</sub> resources over time is the critical variable in residue formation and the resulting bulk δ<sup>13</sup>C value. This is influenced by the form of maize being cooked.</p>
10aBulk δ13C10aMaize history10aPottery residue10aPrehistoric cooking techniques1 aHart, J., P.1 aUrquhart, G., R.1 aFeranec, R., S.1 aLovis, W., A.  uhttp://dx.doi.org/10.1016/j.jas.2009.06.005