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The USP 2 apparatus set-up including a 150 mL mini vessel and PTFE-coated mini paddle which are immersed in an aquarium holding water heated to 37 °C. The motorized stirrer rotates at a constant 65 RPM during experiments. a) shows the entire apparatus, while b) zooms in on the USP vessel. The Techne™ white plastic balls (Fischer Science) assist in maintaining an even 37 °C across the apparatus.
