Articles by Author: Gc O Brien

Search results for Gc O Brien

We found 15 results for you
  1. Acidic iron oxide waste as a conditioner for calcareous soils

    Acidic iron oxide waste as a conditioner for calcareous soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A fine-grained iron oxide (hematite, (α-Fe2O3), containing 1.2% hydrochloric acid by mass, is the main by-product of an acid recovery plant at Saldanha Bay. The alkalinity of calcareous soils in this semi-arid region causes plant deficiencies in many trace elements,...
  2. SHORT NOTES

    SHORT NOTES

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
  3. The rise and fall of HIV prevalence in Zimbabwe: the social, political and economic context

    The rise and fall of HIV prevalence in Zimbabwe: the social, political and economic context

    Item type: Journal Article • Journal: African Journal of AIDS Research
    For more than 10 years Zimbabwe has experienced social, political and economic instability, including the near collapse in 2008 of its health system. Paradoxically, this period has also seen a fall in estimated HIV prevalence, from 25.6% in 1996 to...
  4. Comparative behavioural assessment of an established and a new tigerfish <em>Hydrocynus vittatus</em> population in two man-made lakes in the Limpopo River catchment, southern Africa

    Comparative behavioural assessment of an established and a new tigerfish <em>Hydrocynus vittatus</em> population in two man-made lakes in the Limpopo River catchment, southern Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    With the continued establishment of man-made lakes within the natural distribution range of tigerfish in southern Africa, many artificial tigerfish populations now exist in the region. Very little of the behavioural ecology of these artificial but ecologically important populations is...
  5. Validation of the periodicity of growth increment deposition in otoliths from the larval and early juvenile stages of two cyprinids from the Orange–Vaal river system, South Africa

    Validation of the periodicity of growth increment deposition in otoliths from the larval and early juvenile stages of two cyprinids from the Orange–Vaal river system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    This study tested the hypothesis that growth increments in larval largemouth yellowfish Labeobarbus kimberleyensis and smallmouth yellowfish L. aeneus from the Orange–Vaal river system, South Africa, are deposited daily. The periodicity of increment formation was determined by regular sampling and...
  6. Stress And Coping In Families With A Mentally Or Physically Handicapped Child

    Stress And Coping In Families With A Mentally Or Physically Handicapped Child

    Exposure to stress is intrinsic to family life. Specific characteristics of children, for example, mental and physical handicaps, may influence the amount of stress that the family experiences. These characteristics are relatively unalterable and thus the stress experienced by the...
  7. Ecological integrity assessment of the fish assemblages of the Matigulu/Nyoni and Umvoti estuaries, KwaZulu-Natal, South Africa

    Ecological integrity assessment of the fish assemblages of the Matigulu/Nyoni and Umvoti estuaries, KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The estuarine fish community index (EFCI) and an estuarine fish guild assessment (EFGA) were used in 2004 and 2008 to determine the ecological state and effects of selected ecosystem variables on the Umvoti and Matigulu/Nyoni estuaries. The EFCI indicated that...
  8. Anaesthesia for scoliosis correction surgery complicated by severe recalcitrant bradycardia upon prone positioning in an adolescent with Prader-Willi syndrome

    Anaesthesia for scoliosis correction surgery complicated by severe recalcitrant bradycardia upon prone positioning in an adolescent with Prader-Willi syndrome

    Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia
    A 13-year-old adolescent presented for correction of an 85-degree idiopathic thoracic scoliosis. She was known to have Prader-Willi syndrome. Previous general anaesthesia for non-spinal surgery had been uneventful. On two occasions following uneventful induction and total intravenous anaesthesia (TIVA) maintenance,...