BACKGROUND: Old laying hens are more prone to dietary calcium (Ca) and phosphorus (P) deficiencies as they absorb Ca and P less efficiently than younger hens. OBJECTIVES: In a 2×2 factorial design, the influence of diets with two levels of available phosphorus (AP) and phytase enzyme on the laying performance, egg quality and tibia bone characteristics of laying hens at their late 2nd productio...

The superspace formulation of eleven-dimensional supergravity with a seven-form field strength is given. CERN-TH/96-159 March 22, 2008 Permanent address: Dept. of Mathematics, King’s College, London The superspace formulation of eleven-dimensional supergravity [1] was given in [2]. The superspace constraints can be understood as being required by kappa-symmetry of the supermembrane action [3] a...

We investigate the optical conductivity of a Hubbard ring in presence of an impurity by means of exact diagonalization using the Lanczos algorithm. We concentrate thereby on the first excited, open shell state, i.e. on twisted boundary conditions. In the metallic phase a substantial part of the spectral weight lies in the Drude peak, σ(ω) = Dcδ(ω)+σreg . In the non-interacting system, the Drude...