1. Editorial

   EditorialNotes Pages: 267 - 267

2. Announcements

   Announcement Pages: 268 - 268

3. Cultivation of filamentous fungi in the disc fermenter

   • J. A. Blain
   • J. G. Anderson
   • M. Divers

   OriginalPaper Pages: 269 - 274

4. Increased methane production in biogas

   • T. K. Ghose
   • A. Singh
   • S. N. Mukhopadhyay

   OriginalPaper Pages: 275 - 280

5. An improved method for characterization of citrate production by conidia ofAspergillus niger

   • M. Rohr
   • P. J. Stadler
   • C. P. Kubicek

   OriginalPaper Pages: 281 - 286

6. Mass culture of spirulina using low-cost nutrients

   • C. V. Seshadri
   • Sebastian Thomas

   OriginalPaper Pages: 287 - 291

7. Production of glucose isomerase by different strains ofStreptomyces

   • K. Demnerová
   • S. Pospíšil
   • J. Káš

   OriginalPaper Pages: 293 - 298

8. Genetic improvement of glucose isomerase production inStreptomyces nigrificans by ultraviolet irradiation

   • K. Demnerová
   • S. Pospíšil
   • J. Káš

   OriginalPaper Pages: 299 - 304