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Predicting olive phenology in Portugal in a warming climate
Melo-Abreu, J.P.; Cordeiro, A.M.; Maia, F.B.; Barba, N.G.; Barros, F.; Ribeiro, A.C.; Neves, A.; Vilallobos, F.; Nunes, L.F.; Cardoso, R.M.Prediction of flowering of olive trees should account for chilling requirements, using an appropriate chilling unit for the accounting of chilling accumulation. After chilling requirements are satisfied, dormancy break takes place. Thereafter, the trees enter the forcing phase, in which the thermal time approach is used, but an appropriate base temperature must be determined. Such a model was developed, calibra...
Propane oxidation on Pt-WO3/gamma -AL2O3 catalytic systems
Silva,M.A.Pereira da; Cardoso,R.M.; Schmal,M.The oxidation of propane on was studied with Pt-xWO3/Al2O3 catalysts was studied ,by varying the concentration of tungsten sublayer. Thermal analysis and XRD in situ showed that the enrichment of tungsten at the surface is associated with the formation of HxWO3 bronze. FTIR results with C3H8 and O2 indicated that the catalyst surface properties and the interaction between W and Pt were modified. These modified ...
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