In Figure 4, the polarization curves of the FC incorporating one of the prepared GDEs at the anode or cathode are compared with the reference assembly with Ref.
In this latter case, the so-called gas diffusion electrode (GDE) is obtained, which is a multilayer structure with a quite complex composition.
Because the Pt load primarily affects the oxygen reduction reaction (ORR) occurring at the cathode, the somewhat lower amount of catalyst in GDE2 partly explains the poor performances of the assemblies tested with this GDE. However, the nominal Pt load and the Pt-particle size of the reference do not justify the worsening of the cell performances in the high CD region.
(1998) detected a moderate association between AFLP and COP-based GDEs (r = 0.55), and between sequence-tagged site PCR and COP-based GDEs (r = 0.65).
Two genetic diversity estimates (GDEs) were calculated for each pairwise comparison.
Although reported comparisons of pedigree and molecular marker-based genetic diversity estimates (GDEs) have detected significant associations between estimates generated from the two types of data; correlations were generally weak and GDEs based on pedigree information were larger in magnitude than molecular marker-based estimates (Cox et al., 1985b; Kim and Ward, 1997; Burkhamer et al., 1998).
Since this technology was recently developed, the relationship between AFLP-based GDEs and diversity estimates generated from pedigree information has not been determined.
MDS stress quantifies the discrepancy between MDS-assigned Euclidean distances among cultivars and actual GDEs, thus measuring accuracy of the scatterplot's representation of actual values in the GDE matrix.
2) of the combined data matrix is in general agreement with the hierarchical arrangement of diversity suggested by the GDEs. The first bifurcation separates a cluster with exclusively spring cultivats from a cluster with all the winter cultivars and `Urquie', a facultative SWS cultivar near the SWW cultivar `Gaines'.
The mean GDEs reported above and in Table 4 suggest there may be a general, hierarchical diversity pat tern within hexaploid wheat cultivars adapted to the PNW, with cultivars nested within market class, and market classes nested within growth habit.
* k [greater than or equal to] 5; the GDE
must last at least five years.