The data on ZIÍczFíHz/RczFiHi with added Nz at 391°K may well be better represented by a small positive intercept at ~0.05, but it is apparent that a large number of runs would have to be performed (see for instance ref 22) to permit a clear-cut determination as to the existence of an intercept, or not.(32) Similarly, so did plots of ñcia/ñczFsHs and Rtram/RciFtSi, although any difference in behavior of these two functions would certainly not be anticipated.(33) The data in Figure 7 only show the ratio of the products, but the absolute amount of elimination products is, of course, reduced with increasing pressure.