All Stories

  1. Productive knowledge, scaling, enterprise richness and poverty in a group of small U.S. counties

    Article • Cogent Social Sciences, December 2018, Taylor & Francis

    Dr Danie Francois Toerien

  2. Linking economic value addition, employment and entrepreneurship in local authorities.

    Article • Cogent Social Sciences, June 2015, Taylor & Francis

    Dr Danie Francois Toerien

  3. Enterprise richness as an important characteristic of South African towns

    Article • South African Journal of Science, January 2014, Academy of Science of South Africa

    Dr Danie Francois Toerien

  4. Regional order in the enterprise structures of selected Eastern Cape Karoo towns

    Article • South African Geographical Journal, December 2012, Taylor & Francis

    Dr Danie Francois Toerien

  5. Proportionality in enterprise development of South African towns

    Article • South African Journal of Science, May 2012, Academy of Science of South Africa

    Dr Danie Francois Toerien

  6. Evidence of Island Effects in South African Enterprise Ecosystems

    Article • April 2012, IntechOpen

    Dr Danie Francois Toerien

  7. Enterprise Proportionalities in the Tourism Sector of South African Towns

    Article • April 2012, IntechOpen

    Dr Danie Francois Toerien

  8. Ecology, water and enterprise development in selected rural South African towns

    Article • Water SA, March 2011, African Journals Online (AJOL)

    Dr Danie Francois Toerien

  9. The enterprise ecology of towns in the Karoo, South Africa

    Article • South African Journal of Science, May 2010, Academy of Science of South Africa

    Dr Danie Francois Toerien

  10. Limnological aspects of small sewage ponds

    Article • Water Research, January 1990, Elsevier

    Dr Danie Francois Toerien

  11. Enhanced Biological Phosphorus Removal in Activated Sludge Systems

    Article • January 1990, Springer Science + Business Media

    Dr Danie Francois Toerien

  12. Fish production in small oxidation ponds

    Article • Water Research, October 1988, Elsevier

    Dr Danie Francois Toerien

  13. Recirculation in a small sewage pond system

    Article • Water Research, October 1988, Elsevier

    Dr Danie Francois Toerien

  14. Quality of algal material produced on a fertilizer-tap water medium in outdoor plastic-enclosed systems

    Article • Aquaculture, February 1988, Elsevier

    Dr Danie Francois Toerien

  15. An investigation of a fertilizer-tap water medium for mass algal production in outdoor plastic-enclosed systems

    Article • Biotechnology and Bioengineering, August 1987, Wiley

    Dr Danie Francois Toerien

  16. Bacterial activity in soils of a sub-antarctic island

    Article • Soil Biology and Biochemistry, January 1987, Elsevier

    Dr Danie Francois Toerien

  17. Pollution of water supplies

    Article • Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie, March 1986, AOSIS Open Journals

    Dr Danie Francois Toerien

  18. Laboratory studies on the suitability of a fertilizer-tap water medium for mass culture of algae

    Article • Biotechnology and Bioengineering, November 1985, Wiley

    Dr Danie Francois Toerien

  19. Carbon flow in a small turbid man-made impoundment

    Article • Hydrobiologia, February 1985, Springer Science + Business Media

    Dr Danie Francois Toerien

  20. Utilization of short chain monocarboxylic acids in an effluent of a petrochemical industry byAcinetobacter calcoaceticus

    Article • Biotechnology and Bioengineering, February 1985, Wiley

    Dr Danie Francois Toerien

  21. Microbial heterotrophy in an effluent treatment system using macrophytes

    Article • Agricultural Wastes, January 1985, Elsevier

    Dr Danie Francois Toerien

  22. Preliminary studies on the treatment of sorghum beer brewery effluent in an integrated bacterial/algal/fish/macrophyte culture system

    Article • Agricultural Wastes, January 1985, Elsevier

    Dr Danie Francois Toerien

  23. Influence of the growth rate on the macromolecular composition of in carbon-limited chemostat culture

    Article • FEMS Microbiology Letters, June 1984, Oxford University Press (OUP)

    Dr Danie Francois Toerien

  24. Influence of the growth rate on the macromolecular composition of Acinetobacter calcoaceticus in carbon-limited chemostat culture

    Article • FEMS Microbiology Letters, June 1984, Oxford University Press (OUP)

    Dr Danie Francois Toerien

  25. Potential bacterial-algal interactions of a pond system for the treatment of cattle feedlot effluent

    Article • Agricultural Wastes, January 1984, Elsevier

    Dr Danie Francois Toerien

  26. Some enterobacterial isolates from a pond system for the treatment of cattle feedlot effluent

    Article • Agricultural Wastes, January 1984, Elsevier

    Dr Danie Francois Toerien

  27. The bacteriological quality of water and fish of a pond system for the treatment of cattle feedlot effluent

    Article • Agricultural Wastes, January 1984, Elsevier

    Dr Danie Francois Toerien

  28. Growth models for Salvinia molesta

    Article • Aquatic Botany, June 1983, Elsevier

    Dr Danie Francois Toerien

  29. Oxygen dynamics and heterotrophic aspects of a pond treatment system for cattle feedlot effluent

    Article • Agricultural Wastes, January 1983, Elsevier

    Dr Danie Francois Toerien

  30. THE TEMPERATURE-GROWTH RATE RELATIONSHIPS OF AEROBIC HETEROTROPHIC BACTERIA ISOLATED FROM A SILT-LADEN IMPOUNDMENT

    Article • Journal of the Limnological Society of Southern Africa, January 1982, Taylor & Francis

    Dr Danie Francois Toerien

  31. Growth parameters of Acinetobacter calcoaceticus on acetate and ethanol

    Article • September 1981, Springer Science + Business Media

    Dr Danie Francois Toerien

  32. The Identification of Enterobacteriaceae from Breweries: Combined Use and Comparison of API 20E System, Gel Electrophoresis of Proteins and Gas Chromatography of Volatile Metabolites

    Article • Journal of Applied Bacteriology, August 1981, Wiley

    Dr Danie Francois Toerien

  33. PHENOTYPIC PROPERTIES, METABOLIC ACTIVITIES AND ELECTROPHORETIC PROTEIN PATTERNS OFKlebsiella oxytocaANDKlebsiella pneumoniaeSTRAINS ISOLATED FROM LAGER BEER BREWERIES

    Article • Journal of the Institute of Brewing, July 1981, Wiley

    Dr Danie Francois Toerien

  34. A PRELIMINARY LIMNOLOGICAL STUDY OF BUFFELSPOORT DAM AND ITS CATCHMENT

    Article • Journal of the Limnological Society of Southern Africa, January 1979, Taylor & Francis

    Dr Danie Francois Toerien

  35. VIABLE HETEROTROPHIC BACTERIAL POPULATION STRUCTURE OF A TURBID MAN-MADE IMPOUNDMENT

    Article • Journal of the Limnological Society of Southern Africa, January 1979, Taylor & Francis

    Dr Danie Francois Toerien

  36. ENTEROBACTER AGGLOMERANS-A NEW BACTERIAL CONTAMINANT ISOLATED FROM LAGER BEER BREWERIES

    Article • Journal of the Institute of Brewing, November 1978, Wiley

    Dr Danie Francois Toerien

  37. AN INTRODUCTION TO THE LIMNOLOGY OF ROODEPLAAT DAM

    Article • Journal of the Limnological Society of Southern Africa, January 1978, Taylor & Francis

    Dr Danie Francois Toerien

  38. FACTORS INFLUENCING VIABLE BACTERIA IN A TURBID MAN-MADE IMPOUNDMENT

    Article • Journal of the Limnological Society of Southern Africa, January 1978, Taylor & Francis

    Dr Danie Francois Toerien

  39. A LIMNOLOGICAL INVESTIGATION OF LAKE LIAMBEZI, CAPRIVI

    Article • Journal of the Limnological Society of Southern Africa, January 1978, Taylor & Francis

    Dr Danie Francois Toerien

  40. BOOK REVIEW

    Article • Journal of the Limnological Society of Southern Africa, January 1977, Taylor & Francis

    Dr Danie Francois Toerien

  41. SILICA, NITROGEN AND PHOSPHORUS REQUIREMENTS OF SOME SOUTHERN AFRICAN DIATOMS

    Article • Journal of the Limnological Society of Southern Africa, January 1977, Taylor & Francis

    Dr Danie Francois Toerien

  42. THE SUMMER CONDITION OF THREE EASTERN TRANSVAAL RESERVOIRS AND SOME CONSIDERATIONS REGARDING THE ASSESSMENT OF TROPHIC STATUS

    Article • Journal of the Limnological Society of Southern Africa, January 1977, Taylor & Francis

    Dr Danie Francois Toerien

  43. THE LIMNOLOGY OF SOME SOUTH AFRICAN IMPOUNDMENTS I. THE PHYSICO-CHEMICAL LIMNOLOGY OF HARTBEESPOORT DAM

    Article • Journal of the Limnological Society of Southern Africa, January 1977, Taylor & Francis

    Dr Danie Francois Toerien

  44. The retardment of algal growth in maturation ponds

    Article • Water Research, September 1974, Elsevier

    Dr Danie Francois Toerien

  45. Algal growth prediction using growth kinetic constants

    Article • Water Research, November 1973, Elsevier

    Dr Danie Francois Toerien

  46. The effect of carbon on algal growth—Its relationship to eutrophication

    Article • Water Research, June 1972, Elsevier

    Dr Danie Francois Toerien

  47. Population description of a denitrifying microbial system

    Article • Water Research, August 1971, Elsevier

    Dr Danie Francois Toerien

  48. Selection patterns in a denitrifying population

    Article • Water Research, June 1971, Elsevier

    Dr Danie Francois Toerien

  49. Population description of the non-methanogenic phase of anaerobic digestion—II. Hierarchical classification of isolates

    Article • Water Research, April 1970, Elsevier

    Dr Danie Francois Toerien

  50. Population description of the non-methanogenic phase of anaerobic digestion—III. Non-hierarchical classification of isolates by principal component analysis

    Article • Water Research, April 1970, Elsevier

    Dr Danie Francois Toerien

  51. Population description of the non-methanogenic phase of anaerobic digestion—IV. Intermediary metabolism of non-methanogenic bacteria

    Article • Water Research, April 1970, Elsevier

    Dr Danie Francois Toerien

  52. Enzymatic patterns in two denitrifying microbial populations

    Article • Water Research, February 1970, Elsevier

    Dr Danie Francois Toerien

  53. Population description of the non-methanogenic phase of anaerobic digestion—1. Isolation, characterization and identification of numerically important bacteria

    Article • Water Research, February 1970, Elsevier

    Dr Danie Francois Toerien

  54. Anaerobic digestion I. The microbiology of anaerobic digestion

    Article • Water Research, June 1969, Elsevier

    Dr Danie Francois Toerien

  55. The proteolytic bacteria present in the anaerobic digestion of raw sewage sludge

    Article • Water Research, April 1969, Elsevier

    Dr Danie Francois Toerien

  56. Factor analysis as an aid in an ecological study of anaerobic digestion

    Article • Water Research, February 1969, Elsevier

    Dr Danie Francois Toerien

  57. Enumeration studies on methanogenic bacteria

    Article • Water Research, September 1968, Elsevier

    Dr Danie Francois Toerien

  58. Enumeration, isolation and identification of sulphate-reducing bacteria of anaerobic digestion

    Article • Water Research, September 1968, Elsevier

    Dr Danie Francois Toerien

  59. Interrelations between biological and chemical characteristics in anaerobic digestion

    Article • Water Research, August 1968, Elsevier

    Dr Danie Francois Toerien

  60. A biological and chemical study of several anaerobic digesters

    Article • Water Research, March 1968, Elsevier

    Dr Danie Francois Toerien

  61. The effect of hexoses and a hexose polymer on the levels of some enzyme activities of a bacterium isolated from an anaerobic digester

    Article • Water Research, September 1967, Elsevier

    Dr Danie Francois Toerien

  62. The bacterial nature of the acid-forming phase of anaerobic digestion

    Article • Water Research, July 1967, Elsevier

    Dr Danie Francois Toerien

  63. A method for the enumeration and cultivation of anaerobic “acid-forming” bacteria present in digesting sludge

    Article • Water Research, June 1967, Elsevier

    Dr Danie Francois Toerien

  64. Biological changes during the adaptation of an anaerobic digester to a synthetic substrate

    Article • Water Research, April 1967, Elsevier

    Dr Danie Francois Toerien

  65. Enrichment culture studies on aerobic and facultative anaerobic bacteria found in anaerobic digesters

    Article • Water Research, February 1967, Elsevier

    Dr Danie Francois Toerien

  66. Direct-isolation studies on the aerobic and facultative anaerobic bacterial flora of anaerobic digesters receiving raw sewage sludge

    Article • Water Research, January 1967, Elsevier

    Dr Danie Francois Toerien