Two theoretical studies in particle physics: I.~Calculability in quark flavor mixing.~II.~Forward proton proton and proton antiproton scattering at high energies

I. We consider the origin of the flavor mixings and calculability of mixing parameters in the quark sector of the standard model. The Fritzsch type quark mass matrices are analysed and the results are tested against experiments, predicting the mass of the t-quark as large as 80.8 GeV.; II. In connection with the recent UA4 experiment on {dollar}pbar p{dollar} scattering we reexamine the existence of the odderon and we speculate on the opening of a new threshold.