1. To Hermann Druckrey on the occasion of his 80th birthday

   Announcement Pages: 1 - 2

2. Some actual aspects of tumor induction and promotion

   • E. Boyland

   Guest Editorial Pages: 3 - 5

3. Exposures associated with cancer in humans

   • L. Tomatis

   Guest Editorial Pages: 6 - 10

4. Sequential cellular changes during chemical carcinogenesis

   • P. Bannasch

   Guest Editorial Pages: 11 - 22

5. Immuno-slot-blot: A highly sensitive immunoassay for the quantitation of carcinogen-modified nucleosides in DNA

   • P. Nehls
   • J. Adamkiewicz
   • M. F. Rajewsky

   Original Papers Pages: 23 - 29

6. Repair and replication of DNA in rat brain and liver during foetal and post-natal development, in relation to nitroso-alkyl-urea induced carcinogenesis

   • Valda M. Craddock
   • Anthony R. Henderson
   • Stephen Gash

   Original Papers Pages: 30 - 35

7. O⁶-methylguanine repair in liver cells in vivo: Comparison between G₁- and S-phase of the cell cycle

   • H. M. Rabes
   • R. Kerler
   • R. Wilhelm

   Original Papers Pages: 36 - 45

8. Species differences in nitrosamine carcinogenesis

   • William Lijinsky

   Original Papers Pages: 46 - 55

9. DNA methylation in maternal, fetal and neonatal rat tissues following perinatal administration of procarbazine

   • O. D. Wiestler
   • P. Kleihues
   • S. Ivankovic

   Original Papers Pages: 56 - 59

10. Carcinogenicity of diethylnitrosamine in newborn, infant, and adult mice

    • S. D. Vesselinovitch
    • M. Koka
    • K. V. N. Rao

    Original Papers Pages: 60 - 65

11. The metabolism of N-nitrosomethylaniline

    • H. M. Pylypiw
    • J. R. Zubroff
    • G. W. Harrington

    Original Papers Pages: 66 - 70

12. Comparative metabolism and carcinogenicity of ring-halogenated 3,3-dimethyl-1-phenyltriazenes

    • G. F. Kolar
    • M. Habs

    Original Papers Pages: 71 - 75

13. Alcoholdehydrogenase as an activating enzyme for N-nitrosodiethanolamine (NDELA): In vitro activation of NDELA to a potent mutagen in Salmonella typhimurium

    • G. Eisenbrand
    • E. Denkel
    • B. Pool

    Original Papers Pages: 76 - 80

14. Dose-response study of the carcinogenicity of tobacco-specific N-nitrosamines in F344 rats

    • D. Hoffmann
    • A. Rivenson
    • S. S. Hecht

    Original Papers Pages: 81 - 86

15. Pharmacokinetics and mechanism of action of detoxifying low-molecular-weight thiols

    • N. Brock
    • P. Hilgard
    • S. Orrenius

    Original Papers Pages: 87 - 97

16. On the active principles of the spurge family (Euphorbiaceae)

    • M. Hergenhahn
    • S. Kusumoto
    • E. Hecker

    Original Papers Pages: 98 - 109

17. A study of betel quid carcinogenesis

    • G. Wenke
    • K. D. Brunnemann
    • S. V. Bhide

    Original Papers Pages: 110 - 113

18. Tumors of the nasal cavities induced in rats by 2,2-dioxopropyl-N-Propylnitrosamine

    • A. Cardesa
    • J. Traserra
    • U. Mohr

    Original Papers Pages: 114 - 120

19. Occurrence in human urine of new sulphur-containing N-nitrosamino acids N-nitrosothiazolidine 4-carboxylic acid and its 2-methyl derivative, and their formation

    • H. Ohshima
    • I. K. O'Neill
    • H. Bartsch

    Original Papers Pages: 121 - 128

20. Metabolism of methylazoxymethanol acetate in the F344 rat and strain-2 guinea pig and its inhibition by pyrazole and disulfiram

    • Emerich S. Fiala
    • Callie Stathopoulos

    Original Papers Pages: 129 - 134

21. Biochemical mechanisms on species differences in gastric carcinogenesis

    • Jack Chen
    • William S. Barnes
    • John H. Weisburger

    Original Papers Pages: 135 - 140

22. The level of DNA interstrand crosslinking in bone marrow parallels the extent of myelosuppression in mice treated with four chloroethylnitrosoureas

    • Philip Bedford
    • Martin R. Berger
    • Dietrich Schmähl

    Original Papers Pages: 141 - 147

23. Evaluation of new estrogen-linked 2-chloroethylnitrosoureas

    • M. R. Berger
    • J. Floride
    • G. Eisenbrand

    Original Papers Pages: 148 - 153

24. Carcinogenic activity of condensate from coloquint seeds (Citrullus colocynthis) after chronic epicutaneous administration to mice

    • M. Habs
    • S. A. A. Jahn
    • D. Schmähl

    Original Papers Pages: 154 - 156

25. Volatile nitrosamines in the main stream smoke of black tobacco

    • R. Truhaut
    • Nguyen Phu Lich
    • C. Martin

    Original Papers Pages: 157 - 159

26. Contamination of toiletries and cosmetic products with volatile and nonvolatile N-nitroso carcinogens

    • B. Spiegelhalder
    • R. Preussmann

    Original Papers Pages: 160 - 163

27. Cytostatic activity of steroid linked nitrosoureas

    • W. J. Zeller
    • J. Schreiber
    • G. Eisenbrand

    Original Papers Pages: 164 - 168

28. Dose-response study of urinary bladder carcinogenesis in rats by N-butyl-N-(4-hydroxybutyl)nitrosamine

    • N. Ito
    • T. Shirai
    • M. Hirose

    Original Papers Pages: 169 - 173

29. A two-stage mouse skin carcinogenesis study of lyngbyatoxin A

    • H. Fujiki
    • M. Suganuma
    • T. Sugimura

    Short Communication Pages: 174 - 176