1. Ethical principles and guidelines for experiments on animals

   Swiss Academy of Medical Sciences and Swiss Academy of Sciences Pages: 1 - 3

2. Parental care in terrestrial gastropods

   • B. Baur

   Reviews Pages: 5 - 14

3. Nematodes and the spleen: An immunological relationship

   • J. L. John

   Reviews Pages: 15 - 22

4. Steady-state kinetic studies with the polysulfonate U-9843, an HIV reverse transcriptase inhibitor

   • I. W. Althaus
   • J. J. Chou
   • F. Reusser

   Research Articles Pages: 23 - 28

5. The antimitotic drug 4,6-dimethyl-2-amino-3,4,5-trimethoxyphenyl-pyrimidine inhibits the nucleoside transport system of cells from various animal species

   • A. Pani
   • P. Obino
   • P. La Colla

   Research Articles Pages: 29 - 33

6. Hemoglobin catabolism and the killing of intraerythrocyticPlasmodium falciparum by chloroquine

   • A. U. Orjih
   • J. S. Ryerse
   • C. D. Fitch

   Research Articles Pages: 34 - 39

7. Leukocyte mobilization from the guinea pig spleen by muscarinic cholinergic stimulation

   • G. Sandberg

   Research Articles Pages: 40 - 43

8. Epifluorescence microscopy ofAnabaena sp.: Nucleoid configurations and evidence for inclusion-associated DNA

   • A. Pinevich
   • I. Grigoryeva

   Research Articles Pages: 44 - 48

9. Vanadium induced hemolysis of vitamin E deficient erythrocytes in Hepes buffer

   • T. Hamada

   Research Articles Pages: 49 - 53

10. Retention ofB. burgdorferi pathogenicity and infectivity after multiple passages in a co-culture system

    • E. S. Güner

    Research Articles Pages: 54 - 59

11. Induction of cyst formation by low temperature in the dinoflagellateGonyaulax polyedra Stein: Dependence on circadian phase and requirement of light

    • R. Hardeland

    Research Articles Pages: 60 - 62

12. A novel mechanism for jumping in the indian antHarpegnathos saltator (Jerdon) (Formicidae, Ponerinae)

    • C. Baroni Urbani
    • G. S. Boyan
    • T. M. Musthak Ali

    Research Articles Pages: 63 - 71

13. Variability of sterol utilization in stored-products insects

    • J. A. Svoboda
    • W. R. Lusby

    Research Articles Pages: 72 - 74

14. Naja siamensis, a cryptic species of venomous snake revealed by mtDNA sequencing

    • W. Wüster
    • R. S. Thorpe

    Research Articles Pages: 75 - 79

15. Elemental sulphur (S₈) in higher plants — biogenic or anthropogenic origin

    • H. Kylin
    • S. Atuma
    • S. Jensen

    Research Articles Pages: 80 - 85