Basic Principles in Applied Catalysis 70174 Stuttgart denn der historische Wandel einer 70174 Stuttgart denn der historische Wandel einer Metapher bringt die Metakinetik geschichtlicher Sinnhorizonte und Sichtweisen selbst zum Vorschein The following articles are based on papers presented at an international symposium on "Imported Virus Infections" heI d at the Max von Pettenkofer Institute It is the intention of this contribution to present timely reports by well recognised experts in the field to outline the state of science and technology in selected but representative areas illustrating the basic principles of applied catalysis many types of catalytic materials from which catalysts are formed are needed to achieve high selectivities and space time yields