New abundance tables have been compiled for Cl chondrites and the solar photosphere and corona, based on a critical review of the literature to mid-1988. The meteorite data are generally accurate to +5-10%. Significant discrepancies between Sun and meteorites occur only for Fe, Mn, Ge, Pb, and W; other well-determined elements agree to &90/o on the average. There is no evidence for group fracti...

The chemical quality of groundwater in six district of the eastern region beneath the different types of land use areas of Ghana was examined to evaluate the effects of human activities on groundwater. Analyses indicate that groundwater in the studied area is fresh and generally suitable for most uses. The groundwater is generally characterised by a chemical facies of Ca-HCO3-, Na-Cl and mixed ...

A bstract Coherence violation is an interesting and counter-intuitive phenomenon in QCD. We discuss the circumstances under which occurs observables sensitive to soft radiation arrive at conclusion that almost all such hadron colliders will violate coherence some degree. illustrate our discussion by considering gaps-between-jets observable, where super-leading, then we generalise other observab...