We discuss the reaction ep → ep̃X in the one-photon exchange approximation, where it is in essence the reaction γ∗p → p̃X. A large rapidity gap is required between the particle or particles of the proton remnant p̃ and those of X. We define a suitable azimuthal angle φ between a leptonic and a hadronic plane. The dependence of the cross section on φ is given explicitly and can be used to extract c...

Gold-thiolate/disulfide exchange reactions of (p-SC(6)H(4)Cl)(2) with Ph(3)PAu(SC(6)H(4)CH(3)), dppm(AuSC(6)H(4)CH(3))(2), and dppe(AuSC(6)H(4)CH(3)) (2) were investigated. The rate of reactivity of the gold-thiolate complexes with (p-SC(6)H(4)Cl)(2) is: dppm(AuSC(6)H(4)CH(3))(2)>> dppe(AuSC(6)H(4)CH(3))(2)>Ph(2)PAu (SC(6)H(4)CH(3)). This order correlates with conductivity measurements and two ...

Radical-induced degradation of proton exchange membranes limits the durability proton-exchange membrane fuel cells. Cerium is widely used as a radical scavenger, but migration cerium ions to the...

Distribution of contact pressure between the bipolar plate and gas diffusion layer considerably affect the performance of proton exchange membrane fuel cell. In this regard, an adaptive neuro-fuzzy inference system (ANFIS) is developed to predict the contact pressure distribution on the gas diffusion layer due to dimensional errors of the bipolar plate ribs in a proton exchange membrane fuel ce...

Enhanced electrocatalysis of the oxygen reduction reaction (ORR) on carbon-supported binary and ternary alloys of Pt in phosphoric acid fuel cells has been reported previously. This investigation focuses on the electrocatalysis of the ORR on some binary alloys of Pt (Pt+Ni, Pt+Cr and Pt+Co) at interfaces with proton exchange membranes (Dow perfluorinated sulfonic acids). Comparison of the resul...

Integration of a reformer and a proton exchange membrane fuel cell (PEMFC) is problematic due to the presence in the gas from the reforming process of a slight amount of carbon monoxide. Carbon monoxide poisons the catalyst of the proton exchange membrane fuel cell subsequently degrading the fuel cell performance, and necessitating the sublimation of the reaction gas before supplying to fuel ce...

The subject of this thesis is the search for Odderon induced contributions to exclusive -production in photoproduction events with proton dissociation at the HERA accelerator facility. The search for the Odderon is based on data taken with the detector H1 during the years 1999 and 2000, with special emphasis on the VLQ-calorimeters. An essential part of this thesis is the construction, the comm...

We point out that the measurement of target spin depolarization Dnn in the p̄p → Λ̄Λ reaction may test dynamical mechanisms invoked to explain the proton spin puzzle revealed by polarized deep–inelastic scattering experiments. In particular, models with negatively polarized s̄s pairs in the proton wave function predict Dnn < 0, whereas models with positively polarized gluons would predict Dnn > 0....