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Degradation rate vs. time for Mg-0.3Ca, powder pressed and sintered at 642 °C, exposed to DMEM Glutamax+ 10% FBS cell culture medium (red dots: calculated data according to Equation (5) and Equation (6); blue dots: approximated data by step-wise numerical differentiation of measured data, Equation (4); blue line: nearly constant degradation rate at higher immersion times).
