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Browsing by Author "Toerien, DF"

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  • Toerien, DF; Walters, NM; Swart, DH; Hofmeyr, HP (Bureau Scientific Publications, 1993-01)
    Lutjeharms and Thompson decided that it was the opportune to assess critically what had been wrought by the “dramatic organisational and cultural changes” t o “the largest scientific organisation in Africa” the South African ...
  • Steyn, DJ; Toerien, DF; Visser, JH (Water Research Commission, 1976-01)
    Algal bioassays indicated that the waters of Roodeplaat dam are severely eutrophied since algal growth potentials (AGP) of up to 200 mg/l and batch culture algal growth rate of up to 2,2 d were registered with selemastrm ...
  • Steyn, DJ; Toerien, DF; Visser, JH (Water Research Commission, 1976-04)
    The purpose of this study was to determine the present eutrophication levels of the Vaal dam, to determine how it might be affected by increased discharged of secondary treated sewage effluents
  • Toerien, DF; Grobbelaar, JU; Walmsley, RD (1987)
    Interest in the mass cultivation of micro-algae as feed and foodstuff has existed since the turn of the century (Robinson and Toerien, 1962). Experiments using algae in photosynthetic research (Warburg, 1919) also led to ...