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From 1992 to 2008, antimicrobial consumption per kilogram of pig produced in Denmark decreased by > 50%. Furthermore, there was improvement in productivity, suggesting that long-term swine productivity was not negatively impacted by a ban on AGP use.

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An order parameter is proposed for the uniaxial-biaxial transition in nematic-liquid crystals. The Landau-Ginzburg part of the free energy and the linearized equations of motion for the order parameter and hydrodynamic variables in the uniaxial phase are then derived. The equations are used to predict the power spectrum of light scattering above the uniaxial-biaxial transition.