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The method to determine the adhesion characteristics of fine drug particles for dry powder inhalation (DPI) was established using a colloid probe which mounted a 1-3 μm drug particle on a commercial atomic force microscope (AFM) cantilever. A new preparation system of colloid probes for fine particles smaller than 2.5 μm in diameter was developed with the aid of a micromanipulator and a video microscope...
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