1. Wer verschmutzt wessen Luft in Europa? Schadstofftransport in der Atmosphäre

   • Adolf Ebel

   OriginalPaper Pages: 49 - 64

2. Natural hybridization in freshwater animals Ecological implications and molecular approaches

   • Bruno Streit
   • Thomas Städler
   • Bernd Schierwater

   OriginalPaper Pages: 65 - 73

3. Chromatinstruktur und Genregulation

   • Wolfram Hörz

   OriginalPaper Pages: 74 - 78

4. Discovery of cretaceous arboreal eutherians

   • M. Godinot
   • G. V. R. Prasad

   Short Communications Pages: 79 - 81

5. Frequency spectra of atmospherics over the North Atlantic

   • J. Eichmeier
   • H. Baumer
   • W. Sönning

   Short Communications Pages: 81 - 83

6. Periodic melatonin in the drinking water synchronizes circadian rhythms in sparrows

   • S. Heigl
   • E. Gwinner

   Short Communications Pages: 83 - 85

7. Growth of dendritic zinc oxide crystals by rapid condensation of high temperature ultrasuper-saturated gas

   • K. Yamada

   Short Communications Pages: 85 - 86

8. Identification of allatotropin-secreting cells in the brain of an insect larva

   • M. I. Bogus
   • K. Scheller

   Short Communications Pages: 87 - 89

9. How do outgrowing electrosensory nerve fibers find their peripheral electroreceptor sites?

   • A. Roth

   Short Communications Pages: 89 - 91

10. Buchbesprechungen

    • L. Jaenicke
    • J. Kranz

    BookReview Pages: 91 - 93

11. Naturwissenschaften aktuell

    News Pages: 94 - 96