1. l-Usnic acid: Tumor inhibitor isolated from lichens

   • S. Morris Kupchan
   • Herbert L. Kopperman

   Specialia 01 June 1975 Pages: 625 - 625

2. Microheterogeneity of complex glycosides of bilirubin from human bile

   • C. C. Kuenzle

   Specialia 01 June 1975 Pages: 626 - 627

3. Evidence of major role of the intestine in cholesterol synthesis in the adult male rat

   • F. Chevallier
   • T. Magot

   Specialia 01 June 1975 Pages: 627 - 629

4. The oak leaf roller (Archips semiferanus Walker) sex pheromone complex: Field and laboratory evaluation of requisite behavioral stimuli

   • L. B. Hendry
   • J. Jugovich
   • M. E. Anderson

   Specialia 01 June 1975 Pages: 629 - 631

5. Effect of spermine on adenyl cyclase activity of spermatozoa

   • G. V. Shah
   • A. R. Sheth
   • Shanta S. Rao

   Specialia 01 June 1975 Pages: 631 - 632

6. Cerebral uptake of noradrenaline in vitro; Occurence of different uptake systems and effect of partial external sodium substitution

   • J. P. Natali
   • P. Joanny
   • F. Blanquet

   Specialia 01 June 1975 Pages: 632 - 634

7. Variation in the total content of alkaline RNAse in mouse lymphocytes from different organs

   • D. Maor
   • N. Vardinon
   • P. Alexander

   Specialia 01 June 1975 Pages: 634 - 635

8. Evidence for the allosteric nature of IAA oxidase system inPhaseolus mungo hypocotyls

   • K. K. Nanda
   • K. Gurumurti
   • R. N. Chibbar

   Specialia 01 June 1975 Pages: 635 - 637

9. Inhibition of cathepsin A activity by the potato protease inhibitor

   • K. Worowski

   Specialia 01 June 1975 Pages: 637 - 638

10. Differences in RNA content related to mating type inAscobolus immersus

    • C. Hamelin
    • G. H. Cousineau

    Specialia 01 June 1975 Pages: 638 - 639

11. The karyotype ofDusicyon griseus (Carnivora canidae)

    • M. Gallardo
    • J. R. Formas

    Specialia 01 June 1975 Pages: 639 - 640

12. The effect of object distance on pattern preferences in the walking fly,Drosophila melanogaster

    • R. Wehner
    • E. Horn

    Specialia 01 June 1975 Pages: 641 - 643

13. Lysis of zoospores ofPhytophthora palminora induced by concanavalin A

    • V. O. Sing
    • S. Bartnicki-Garcia

    Specialia 01 June 1975 Pages: 643 - 644

14. The proposal of an unified model for the interpretation of the activity of different classes ofβ-adrenergic agents

    • H. L. Ammon
    • A. Balsamo
    • W. E. Keefe

    Specialia 01 June 1975 Pages: 644 - 646

15. Properties of Ca²⁺, Mg²⁺-dependent endonuclease from sea urchin eggs ofArbacia punctulata

    • S. S. Koide
    • L. Burzio
    • Y. Tanigawa

    Specialia 01 June 1975 Pages: 646 - 648

16. Effect of territorial conditions on the maintenance of pair contact in duetting birds

    • D. Todt

    Specialia 01 June 1975 Pages: 648 - 649

17. Symbionts in the female tsetse flyGlossina morsitans morsitans

    • Pamela E. Pell
    • D. I. Southern

    Specialia 01 June 1975 Pages: 650 - 651

18. Hybridization of incompatible poplars following solvent treatment of stigmas

    • M. I. Whitecross
    • R. R. Willing

    Specialia 01 June 1975 Pages: 651 - 653

19. A23187 and red cells: Changes in deformability, K⁺, Mg²⁺, Ca²⁺ and ATP

    • F. H. Kirkpatrick
    • D. G. Hillman
    • P. L. La Celle

    Specialia 01 June 1975 Pages: 653 - 654

20. Failure to demonstrate the presence of a sodium transport inhibiting factor in the serum of uremic patients

    • D. Querido
    • V. Levin
    • L. C. Isaacson

    Specialia 01 June 1975 Pages: 655 - 656

21. Is there a single cell code for background light levels?

    • G. D. Ritchie
    • A. A. Lee
    • R. M. Hill

    Specialia 01 June 1975 Pages: 656 - 657

22. Age dependent variation of serum creatine phosphokinase levels in pigs

    • J. J. A. Heffron
    • G. Mitchell

    Specialia 01 June 1975 Pages: 657 - 658

23. Gastrointestinal hormones and neural interaction within the central nervous system

    • N. Dafny
    • R. H. Jacob
    • E. D. Jacobson

    Specialia 01 June 1975 Pages: 658 - 660

24. Increased erythrocytes sodium efflux in genetic hypertensive rats of the Hebrew University strain

    • D. Ben-Ishay
    • A. Aviram
    • R. Viskoper

    Specialia 01 June 1975 Pages: 660 - 662

25. Inhibitors of the adhesiveness of enteropathogenicE. coli

    • D. A. Rivier
    • M. R. Darekar

    Specialia 01 June 1975 Pages: 662 - 664

26. Quinine stimulation of Ca⁴⁵ efflux from arthropod skeletal muscle in relation to quinine effects on fibre calcium translocation and binding

    • H. Huddart
    • Mary West

    Specialia 01 June 1975 Pages: 665 - 667

27. ³H-Nortriptyline uptake and tissue-binding in vitro and its effect on³H-noradrenaline uptake

    • B. Hamberger
    • J. R. Tuck

    Specialia 01 June 1975 Pages: 667 - 668

28. Monoamine oxidase inhibitors antagonize the acceleration of brain dopamine synthesis induced by neuroleptic drugs in vivo: Implications for the treatment of tardive dyskinesia

    • B. K. Koe

    Specialia 01 June 1975 Pages: 669 - 671

29. Increased vascular permeability induced in synovialis of the rat by histamine, serotonin and bradykinin

    • L. P. Bignold
    • A. W. J. Lykke

    Specialia 01 June 1975 Pages: 671 - 672

30. Increased catecholamine excretion in the rat after administration ofα-methyl-tyrosine

    • M. Beauvallet
    • J. Roffi
    • M. Legrad-Tissot

    Specialia 01 June 1975 Pages: 672 - 674

31. Amphetamine-induced changes in body temperature and glycogen content of the encephalon in the chicken

    • T. K. Hevor
    • P. R. Lehr
    • J. Gayet

    Specialia 01 June 1975 Pages: 674 - 676

32. Effect of drug-induced increase of brain GABA levels on penicillin focus

    • Z. Elazar
    • Zehava Gottesfeld

    Specialia 01 June 1975 Pages: 676 - 678

33. Effect of ethanol on toxicity and metabolism of amphetamine in the mouse

    • F. Iverson
    • B. B. Coldwell
    • L. W. Whitehouse

    Specialia 01 June 1975 Pages: 679 - 680

34. In vivo and in vitro studies on irreversible binding of halothane metabolites to proteins

    • V. Hempel
    • H. Remmer

    Specialia 01 June 1975 Pages: 680 - 681

35. The assessment of tobacco smoke toxicity in organ culture. II. Ultrastructural studies on the immediate response of foetal rabbit tracheal epithelium to short-term exposures of whole smoke

    • P. Davies
    • G. S. Kistler

    Specialia 01 June 1975 Pages: 682 - 684

36. The sperm bundles of honeybeeApis cerana indica fabr

    • S. R. Bawa
    • R. K. Marwaha

    Specialia 01 June 1975 Pages: 684 - 686

37. Synchronized liver cells: A new tool for analysis of cell-cycle dependent carcinogenbinding to DNA in vivo

    • H. M. Rabes
    • G. Iseler
    • R. Kerler

    Specialia 01 June 1975 Pages: 686 - 687

38. Effect of iododeoxyuridine on tumor induction in X-irradiated rats

    • D. K. Myers

    Specialia 01 June 1975 Pages: 687 - 688

39. Effects of ether anesthesia on plasma prolactin sampling

    • C. E. Simonel
    • C. L. Brooks
    • C. W. Welsch

    Specialia 01 June 1975 Pages: 688 - 689

40. Thyroxine formation by fish kidney soluble supernatant ofAnabas testudineus

    • S. Bhattacharya
    • P. Dasgupta

    Specialia 01 June 1975 Pages: 689 - 691

41. Juvenile hormone promotes dominance behavior and ovarian development in social wasps (Polistes annularis)

    • R. H. Barth
    • L. J. Lester
    • R. Hearn

    Specialia 01 June 1975 Pages: 691 - 692

42. The effect of electrical stimulation on the cephalic neurosecretory system in the last instar nymph of the dragonfly,Orthetrum chrysis (Selys) (Odonata; Libellulidae)

    • V. K. Thakare
    • D. B. Tembhare

    Specialia 01 June 1975 Pages: 693 - 694

43. Artificial feeding of simuliids (Simulium venustum): Factors associated with probing and gorging

    • J. F. Sutcliffe
    • Susan B. McIver

    Pro Experimentis 01 June 1975 Pages: 694 - 695

44. A scanning electron microscope method for the examination of glass microelectrode tips either before or after use

    • D. M. Fry

    Pro Experimentis 01 June 1975 Pages: 695 - 697

45. A simple method for the microscopic examination of unsquashed, stained organs of insects

    • H. Messthaler

    Pro Experimentis 01 June 1975 Pages: 697 - 698

46. A technique for chromosome analysis of small rodents without sacrificing the animal

    • Martha S. Bianchi
    • Susana Merani
    • N. O. Bianchi

    Pro Experimentis 01 June 1975 Pages: 698 - 699

47. Simple method for a medium-cell separation

    • M. Jurovčík

    Pro Experimentis 01 June 1975 Pages: 699 - 700

48. Technique immunohistochimique rapide d'identification des cellules lymphoïdes de la lignée B

    • D. Schmitt
    • J. Viac
    • J. Thivolet

    Pro Experimentis 01 June 1975 Pages: 700 - 702

49. A plea for more ecological ethics in development aid

    • J. Kühnau

    Oecologica Humana 01 June 1975 Pages: 702 - 704

50. Congressus

    Announcement 01 June 1975 Pages: 704 - 704