Articles by Author: George John

Search results for George John

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  1. Effect of garlic, black seed and Biogen as immunostimulants on the growth and survival of Nile tilapia, <em>Oreochromis niloticus</em> (Teleostei: Cichlidae), and their response to artificial infection with <em>Pseudomonas fluorescens</em>

    Effect of garlic, black seed and Biogen as immunostimulants on the growth and survival of Nile tilapia, <em>Oreochromis niloticus</em> (Teleostei: Cichlidae), and their response to artificial infection with <em>Pseudomonas fluorescens</em>

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Three dosage levels of black seed, garlic and commercial Biogen were administered for three months in summer and six months in winter to test their stimulation effect on growth, survival and response to challenge infection in Oreochromis niloticus. At the...
  2. Terms of address usage by police officers at Mbare Police Station, Harare, in conversation with complainants

    Terms of address usage by police officers at Mbare Police Station, Harare, in conversation with complainants

    Item type: Journal Article • Journal: South African Journal of African Languages
    This article describes terms of address usage by police officers at Mbare Police Station, Harare, in conversation with members of the public who came to report cases from 3 June 2010 to 12 October 2010. The researchers visited the police...
  3. The Use of Roots to Test N, P and K Deficiencies in <em>Eucalyptus</em> Nutrition

    Item type: Journal Article • Journal: South African Forestry Journal
    Bioassays have been developed which can provide diagnostics of the nutritional status of trees. They measure the flux of N, P or Rb for K into roots from standard solutions where the rate of influx is inversely related to nutrient...
  4. Postflexion and transforming larvae of <em>Gonorynchus gonorynchus</em> (Linnaeus, 1766)

    Postflexion and transforming larvae of <em>Gonorynchus gonorynchus</em> (Linnaeus, 1766)

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Postflexion larvae of Gonorynchus gonorynchus, previously undocumented, are described from the South-East Atlantic. Comparisons with descriptions of larval G. abbreviatus and larvae of another, still unidentified, species of Gonorynchus suggest slight to conspicuous differences in pigmentation between species.
  5. Development of a doubled haploid mapping population and linkage map for the bread wheat cross Kariega × Avocet S

    Development of a doubled haploid mapping population and linkage map for the bread wheat cross Kariega × Avocet S

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A doubled haploid wheat population of 150 lines was constructed from the F1 of a cross between cultivars Kariega and Avocet S using the wheat-maize technique. Segregation and linkage analysis of 203 DNA markers, two storage protein markers and the...
  6. Disaggregation of land types using terrain analysis, expert knowledge and GIS methods

    Disaggregation of land types using terrain analysis, expert knowledge and GIS methods

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Soil maps’ value is increasingly recognised for enabling the optimal management of ecosystems. Digital soil mapping (DSM) can overcome the cost constraints of traditional mapping methods, but requires local area-specific research. As South Africa is blessed with the land type...