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