1. Agroforestry in Mexico: Can the past be a guarantee for the future?

   • H. Puig

   Reviews Pages: 621 - 625

2. Zinc, copper and selenium in reproduction

   • R. S. Bedwal
   • A. Bahuguna

   Reviews Pages: 626 - 640

3. Diurnal variation of hue discriminatory capability under artificial constant illumination

   • T. Morita
   • M. Ohyama
   • H. Tokura

   Research Articles Pages: 641 - 643

4. AfricanClarias catfish elicits long-lasting weak electric pulses

   • V. D. Baron
   • A. A. Orlov
   • A. S. Golubtsov

   Research Articles Pages: 644 - 647

5. Efficacy of tumor cell vaccine after incorporating monophosphoryl lipid A (MPL) in tumor cell membranes containing tumor-associated ganglioside

   • M. H. Ravindranath
   • S. M. Brazeau
   • D. L. Morton

   Research Articles Pages: 648 - 653

6. Effect of xanthurenic acid on P-450-dependent biotransformation by molting glands in vitro

   • M. Ohnishi
   • Y. Naya

   Research Articles Pages: 654 - 657

7. S-adenosyl-L-homocysteine: A non-cytotoxic hypomethylating agent

   • S. F. De Cabo
   • M. J. Hazen
   • J. Fernández-Piqueras

   Research Articles Pages: 658 - 659

8. Alteration of mitochondrial bioenergetics due to intravenous injection of a perfluorocarbon emulsion

   • D. Branca
   • S. M. Chiarelli
   • G. Scutari

   Research Articles Pages: 660 - 663

9. Identification of organ-specific glycosylation of a membrane protein in two tissues using lectins

   • M. Benallal
   • B. M. Anner

   Research Articles Pages: 664 - 668

10. UV guided dendritic growth patterns and the networking of melanocytes

    • B. Iyengar

    Research Articles Pages: 669 - 672

11. An efficient method for purification of cuprozinc superoxide dismutase from bovine erythrocytes

    • Y. Kumagai
    • M. Shinyashiki
    • M. Sagai

    Research Articles Pages: 673 - 676

12. Microdialysis study of ischemia-induced hydroxyl radicals in the canine heart

    • A. A. Timoshin
    • O. V. Tskitishvili
    • E. K. Ruuge

    Research Articles Pages: 677 - 679

13. Effect of urochordamines on larval metamorphosis of ascidians

    • S. Tsukamoto
    • H. Hirota
    • N. Fusetani

    Research Articles Pages: 680 - 683

14. Okadaxanthin, a novel C₅₀-carotenoid from a bacterium,Pseudomonas sp. KK10206C associated with marine sponge,Halichondria okadai

    • W. Miki
    • N. Otaki
    • N. Shimidzu

    Research Articles Pages: 684 - 686

15. Haptoglobin development in newborn infants from diabetic mothers

    • P. Borgiani
    • F. Gloria-Bottini
    • E. Bottini

    Research Articles Pages: 687 - 690

16. Population genetics of a colonizing lizard: Loss of variability in introduced populations ofPodarcis sicula

    • M. Capula

    Research Articles Pages: 691 - 696

17. A magnetic pulse leads to a temporary deflection in the orientation of migratory birds

    • W. Wiltschko
    • U. Munro
    • R. Wiltschko

    Research Articles Pages: 697 - 700

18. Plant uptake of aluminium from calcareous soils

    • G. Tyler

    Research Articles Pages: 701 - 703

19. Erratum

    Erratum Pages: 704 - 704