In-situ studies of atmospheric-pressure dielectric barrier plasma treatment of zinc alloys and zinc oxides / submitted by Mr. Steffen Knust, M. Sc. ; [First examiner and the first referee: Herr Prof. Dr.-Ing. Guido Grundmeier, Second examiner and the second referee: Herr Prof. Dr. Jörg Lindner, Third examiner: Herr PD. Dr. Hans Egold]