Institute of Pharmaceutical Technology and Regulatory Affairs University of Szeged Szeged H-6720 Hungary;
Institute of Pharmaceutical Sciences Pharmaceutical Technology and Biopharmacy University of Graz Universitätsplatz 1 Graz A-8010 AustriaResearch Center Pharmaceutical Engineering GmbH Inffeldgasse 13 Graz A-8010 Austria;
Institute of Pharmaceutical Technology and Regulatory Affairs University of Szeged Szeged H-6720 Hungary;
Institute of Pharmaceutical Sciences Pharmaceutical Technology and Biopharmacy University of Graz Universitätsplatz 1 Graz A-8010 AustriaResearch Center Pharmaceutical Engineering GmbH Inffeldgasse 13 Graz A-8010 Austria;
Institute of Pharmaceutical Technology and Regulatory Affairs University of Szeged Szeged H-6720 Hungary;
Dry powder inhaler; Ethanol; Particle engineering; Roughness; Aerodynamic properties;