1. International aspects of biotechnology

   • Lynton K. Caldwell

   Guest Editorial and Review Pages: 245 - 258

2. African fermented foods: from art to science

   • S. A. Odunfa

   Review Pages: 259 - 273

3. Rapid method for isolation and purification of protoplasts from epidermal tissue ofVicia faba L. leaves

   • Laura P. Zanello
   • Nestor R. Curvetto
   • Francisco J. Barrantes

   Research Papers Pages: 275 - 283

4. Ecology of microalgae in a high rate pond for piggery effluent purification in Singapore

   • Tiow-Suan Sim
   • Anthony Goh

   Research Papers Pages: 285 - 297

5. Methane fermentation of water hyacinth: effect of solids concentration and inoculum source

   • H. A. Dirar
   • H. B. El Amin

   Research Papers Pages: 299 - 312

6. Methane fermentation of water hyacinth: effect of retention time and temperature

   • H. B. El Amin
   • H. A. Dirar

   Research Papers Pages: 313 - 326

7. Purification and some properties of a thermostable protease ofThermoactinomyces thalpophilus

   • F. J. C. Odibo
   • S. K. C. Obi

   Research Papers Pages: 327 - 332

8. Incidence and enterotoxigenicity of enterotoxigenic (Escherichia coli) from uncooked meat sausages

   • L. K. Gupta
   • I. M. Wadhawan
   • R. P. Tiwari

   Research Papers Pages: 333 - 337

9. Higher protective activity of Fab' fragment compared to F(ab')₂ and IgG on experimental tetanus

   • Celidéia A. C. Vaz
   • H. Ferreira
   • Vera L. G. Calich

   Research Papers Pages: 339 - 348

10. The viability and infectivity ofToxocara canis infective larvae after a prolonged period of storage at different temperatures

    • Abdul-Rahman A. Al-Tae
    • Nada M. Al-Bashir

    Research Papers Pages: 349 - 355

11. A single-step purification of an extracellular fungal laccase

    • E. Grotewold
    • G. E. Taccioli
    • N. D. Judewicz

    Research Papers Pages: 357 - 363

12. Nitrogen fixation in bambara groundnut,Voandzeia subterranea (L.) Thouars

    • Mamadou Gueye
    • Lucien M. Bordeleau

    Research Papers Pages: 365 - 375