1. Teaching of microbiology in Brazil: progress or stagnation?

   • J. R. Jardim Freire
   • W. Gambale

   Guest Editorial Pages: 307 - 310

2. Phenotypic variation in exopolysaccharide production in the marine, aerobic nitrogen-fixing unicellular cyanobacterium Cyanothece sp.

   • K. J. Reddy
   • B. W. Soper
   • R. L. Bradley

   Research Pages: 311 - 318

3. Encapsulation as a response of Azospirillum brasilense sp7 to zinc stress

   • P. Mangala Gowri
   • S. Srivastava

   Research Pages: 319 - 322

4. Effect of chlorobenzoates on the degradation of polychlorinated biphenyls (PCB) by Pseudomonas stutzeri

   • B. Vrana
   • K. Dercová
   • A. Ševčíková

   Research Pages: 323 - 326

5. Natural genetic engineering of plant cells: the molecular biology of crown gall and hairy root disease

   • K. Weising
   • G. Kahl

   Research Pages: 327 - 351

6. Molecular cloning and transposition of a kanamycin resistance determinant from Campylobacter jejuni between replicons in Escherichia coli

   • R. Son
   • A. Ansary

   Research Pages: 353 - 356

7. Ethanol production by fermentation of sweet-stem sorghum juice using various yeast strains

   • B. Bulawayo
   • J. M. Bvochora
   • R. Zvauya

   Research Pages: 357 - 360

8. Comparison of two sympatric Pasteuria populations isolated from a tropical vertisol soil

   • S. B. Sharma
   • K. G. Davies

   Research Pages: 361 - 366

9. Selection and preliminary characterization of a Pseudomonas aeruginosa strain mineralizing selected isomers in a branchedchain dodecylbenzenesulphonate mixture

   • G. Soberón-Chávez
   • J. Campos
   • J. Ortigoza

   Research Pages: 367 - 372

10. Cephalosporin C acylase and penicillin V acylase formation by Aeromonas sp. ACY 95

    • B. S. Deshpande
    • S. S. Ambedkar
    • J. G. Shewale

    Research Pages: 373 - 378

11. Changes in nitrogen resources with increases in temperature during production of mushroom compost

    • J. -M. Savoie
    • J. -M. Olivier
    • J. Laborde

    Research Pages: 379 - 384

12. Effect of wastewater stabilization ponds on antimicrobial susceptibility and haemolysin occurrence among motile Aeromonas strains

    • B. Imziln
    • Y. M. O. Lafdal
    • M. Jana

    Research Pages: 385 - 390

13. Biofilm formation in water cooling systems

    • M. T. S. Lutterbach
    • F. P. de França

    Research Pages: 391 - 394

14. Activity of an isothiazolone biocide against Hormoconis resinae in pure and mixed biofilms

    • P. S. Guiamet
    • C. C. Gaylarde

    Research Pages: 395 - 397

15. Thermotolerant strain of Bacillus licheniformis producing lipase

    • H. Khyami-Horani

    Research Pages: 399 - 401

16. Starter culture for the production of ‘soyiru’

    • H. A. Suberu
    • J. A. Akinyanju

    Short Communication Pages: 403 - 404

17. Restriction fragment length polymorphism (RFLP) of Salmonella organisms

    • S. I. Koh-Luar
    • S. T. Chew
    • S. B. Chua

    Short Communication Pages: 405 - 407

18. Continuous anaerobic phenol degradation using an adapted mixed culture

    • R. Satsangee
    • P. Ghosh

    Short Communication Pages: 409 - 411

19. Exocellular hydrolases from Penicillium ulaiense

    • V. B. Rajal
    • L. Carrillo
    • C. M. Cuevas

    Short Note Pages: 413 - 414

20. Ethanol yields during the feeding phase in fed-batch fermentation of sugar-cane blackstrap molasses

    • W. Borzani

    Short Note Pages: 415 - 416

21. Short communications: Effect of water activity on cell growth and phenol oxidase production by Streptomyces cyneus var. viridochromogenes in surface culture

    • M. Berrocal
    • S. Huerta
    • M.E. Arias

    Erratum Pages: 417 - 418

22. Meeting announcements

    Events Pages: 419 - 420