1. Fließgewässergefährdung durch Insektizide

   • Peter Zwick

   OriginalPaper Pages: 437 - 442

2. Experimente zum Quantenchaos

   • Hans Jürgen Stöckmann

   OriginalPaper Pages: 443 - 449

3. Hydratkomplexe in wäßrigen Tensidsystemen

   • Rudolf Heusch

   OriginalPaper Pages: 450 - 456

4. Die Problematik der Gülledüngung in der Landwirtschaft

   • Amir Barekzai

   OriginalPaper Pages: 457 - 461

5. Cochlea size in extant chiroptera and middle eocene microchiropterans from messel

   • J. Habersetzer
   • G. Storch

   Short Communications Pages: 462 - 466

6. The hydrazinium ion coordinating trivalent rhenium in (NH₄)_0.5 (H₂O)_0.5[Re₃Cl₁₀(N₂H₅)Cl_0.5(H₂O)_0.5] · 3H₂O

   • A. Möller
   • G. Meyer

   Short Communications Pages: 466 - 467

7. Direction-selective neurons with tonic and phasic response profiles contribute to the optokinetic system ofApis mellifera

   • M. R. Ibbotson

   Short Communications Pages: 467 - 470

8. Coexistence and dominance among queens and mated workers in the antPachycondyla tridentata

   • K. Sommer
   • B. Hölldobler

   Short Communications Pages: 470 - 472

9. The antiglucocorticoid RU 38486 reverses the wasting syndrome in newborn rats

   • G. Lazar Jr.
   • G. Lazar
   • M. K. Agarwal

   Short Communications Pages: 472 - 473

10. Seasonal changes in adult mammalian brain weight

    • E. Weiler

    Short Communications Pages: 474 - 476

11. Evidence for lecithotrophic viviparity in the living coelacanth

    • H. Fricke
    • J. Frahm

    Short Communications Pages: 476 - 479

12. A universal constant in temporal segmentation of human speech

    • M. Vollrath
    • J. Kazenwadel
    • H.-P. Krüger

    Letter to the Editors Pages: 479 - 480

13. Buchbesprechungen

    • H. Pfanz

    BookReview Pages: 480 - 481

14. Naturwissenschaften aktuell

    News Pages: 482 - 484