1. HERA: a Supermicroscope for Investigating the Structure of the Proton

   • Gerd W. Buschhorn

   Review Article Pages: 565 - 574

2. Cardiac Contractility: How Calcium Activates the Myofilaments

   • J. Caspar Rüegg

   REVIEW ARTICLES Pages: 575 - 582

3. Coupling Physiology and Gene Regulation in Bacteria: The Phosphotransferase Sugar Uptake System Delivers the Signals

   • Jörg Stülke
   • Wolfgang Hillen

   REVIEW ARTICLES Pages: 583 - 592

4. Direct Genetic Evidence for Local Mate Competition in Ants

   • Jes S. Pedersen
   • Jacobus J. Boomsma

   SHORT COMMUNICATIONS Pages: 593 - 595

5. The Mandibular Gland, Probably the Source of the Alarm Substance in Leptanilla sp. (Hymenoptera, Formicidae)

   • J. Billen
   • F. Ito
   • E. D. Morgan

   SHORT COMMUNICATIONS Pages: 596 - 597

6. Stable Isotopes of Nitrogen in Fossil Cladoceran Exoskeletons: Implications for Nitrogen Sources in the Central Baltic Sea During the Past Century

   • Ulrich Struck
   • Maren Voss
   • Nicolai Mumm

   SHORT COMMUNICATIONS Pages: 597 - 603

7. A Biomimetic Electron Releasing Device: Capacitively Connected Glow Discharge Electrode

   • K. Miyake
   • H. Sakurai
   • Y. Ito

   SHORT COMMUNICATIONS Pages: 603 - 605

8. Wissenschaftsbeziehungen zwischen Deutschland und der Voksrepublik China

   NATURWISSENSCHAFTEN AKTUELL Pages: 606 - 608