Analysis of methanogenic populations in anaerobic digesters : development and application of cofactor assays / Leonardus Gerardus Maria GorrisHydrogenosomes and methanogenic endosymbionts in sapropelic ciliates / Nicolaas Karel GoosenRedox-sensitive enzyme activities involved in methyl group transfer and coenzyme F420 conversion in Methanobacterium thermoautotrophicum / Servatius Wilhelmus Maria KengenInterrelations between sulfate-reducing and methane-producing bacteria in bottom deposits of a fresh-water lake / by Thomas Ernst CappenbergCorrinoid-dependent methyl group transfer reactions in methylotrophic methanogens / Wilhelmus Marinus Hermanus van de WijngaardMethanogenic coenzymes : structure, function and biotechnological application / Petronella Catharina Raemakers-FrankenAcetate metabolism in Methanothrix soehngenii / Michaël Silvester Maria JettenStructure and stability of methanogenic granular sludge / J.T.C. GrotenhuisMobile genetic elements in Methanobacterium thermoformicium / J. NöllingTetrahydromethanopterin-dependent enzymes involved in methanogenesis / Bernardus Wilhelmus Josef te BrömmelstroetPhosphate metabolism in Methanobacterium thermoautotrophicum (strain →d⇋H) / Gerardus Johannes Wilhelmus Maria van AlebeekFactor F390 : a novel signal transduction system in methanogenic bacteria / Paul VermeijMethanogenesis : studies of the process and the micro-organisms involved in methane formation / door Theodorus Jacobus Henri Mari HuttenCoenzymes of methanogenesis / door Johannes Theodorus Maria KeltjensStructure and function of methanopterin / Patrick van BeelenMethanol conversion by methanogenic and acetogenic bacteria / Peter van der MeijdenMethanogenic bacteria as endosymbionts of sapropelic protozoa / Johan Jacobus Albert van Bruggen