Cephalostatin Analogues – Synthesis and Biological Activity (Timo Flessner/Rolf Jautelat/Ulrich Scholz/Ekkehard Winterfeldt) Introduction • Synthesis of Bissteroidal Pyrazines • A-D-Ring Functionalization • The Spiroketal Area of Cephalostatins, Summary • Acknowledgements • References Siderophores of the Pseudomonadaceae sensu stricto (Fluorescent and Non-Fluorescent Pseudomonas spp.) (Herbert Budzikiewicz) Introduction • The Typical Siderophores of the Fluorescent Pseudomonads – the Pyoverdins • Other Siderophores of Fluorescent Pseudomonads • Iron Sequestering • Pseudomonas and Health • Pseudomonas and Agriculture • Pseudomonas and Environmental Problems • Acknowledgements • Abbreviations • Appendices: Bacterial Species, Bacterial Culture Collections • References: Books, Chapters and Review Articles, Original Publications Author Index Subject Index