Articles by Keyword: Microscopy

Search results for Microscopy

We found 12 results for you
  1. Leaf scorch on <em>Pennisetum clandestinum</em> dryland pastures induced by liquid urea ammonium nitrate fertilizer

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Transmission electron (TEM) and scanning electron microscopy (SEM) demonstrated that the application of liquid urea ammonium nitrate (UAN 32) fertilizer, in concentrated form, to dryland pastures resulted in leaf scorch and subsequent necrosis, irrespective of the level and concentration of...
  2. Morphogenesis of <em>Malus domestica</em> cv. Starking flower buds

    Morphogenesis of <em>Malus domestica</em> cv. Starking flower buds

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Differentiation of reproductive buds of the Starking apple (Malus domestica) was studied by scanning electron microscopy. Differentiation of reproductive structures was initiated during the first week of January when the shoot apex flattened. In terminal flower primordia, sepal primordia were...
  3. Light, scanning and transmission electron microscopy studies on the conidiogenesis of <em>Cercospora zeae-maydis</em> on maize

    Light, scanning and transmission electron microscopy studies on the conidiogenesis of <em>Cercospora zeae-maydis</em> on maize

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Light, scanning and transmission electron microscopy were used to study conidiophore formation and conidiogenesis by Cercospora zeae-maydis Tehon & Daniels, the causal organism of grey leaf spot on maize, Zea mays L. Hyphae aggregate in the substomatal cavity and give...
  4. DIGESTION OF <em>MICROCYSTIS AERUGINOSA</em> BY <em>OREOCHROMIS MOSSAMBICUS</em>

    DIGESTION OF <em>MICROCYSTIS AERUGINOSA</em> BY <em>OREOCHROMIS MOSSAMBICUS</em>

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The mean assimilation efficiency of aquarium acclimatized Oreochromis mossambiaue fed on a diet of Microcystis aeruginosa collected from Hartbeespoort Dam was determined as 50,8% for total organic matter, 63,7% for protein and 75,5% for phosphorus. Transmission electron microscopic examination of...
  5. DEVELOPMENTS IN TWENTY-FIVE YEARS OF DIATOM (BACILLARIOPHYCEAE) RESEARCH IN SOUTH AFRICA

    DEVELOPMENTS IN TWENTY-FIVE YEARS OF DIATOM (BACILLARIOPHYCEAE) RESEARCH IN SOUTH AFRICA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Diatom research in South Africa can be divided into four distinct periods. The first period covers a span of some seventy years, beginning with Shadbolt's (1854) account of diatoms from Port Natal, and continuing with brief notes and reports on...
  6. The role of ornamental goldfish <em>Carassius auratus</em> in transfer of some viruses and ectoparasites to cultured fish in Egypt: comparative ultra-pathological studies

    The role of ornamental goldfish <em>Carassius auratus</em> in transfer of some viruses and ectoparasites to cultured fish in Egypt: comparative ultra-pathological studies

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Goldfish, common carp and Nile tilapia were sampled between September 2002 and May 2003 to investigate lesions induced by viral diseases and ectoparasites. Goldfish exhibited neoplasms, Dermocystidium sp., Ichthyophthirius multifiliis (Ich), Trichodina reticulata, Lernaea cyprinacea and systemic infections. Neoplastic and...
  7. Seed quality characteristics of a bambara groundnut (<em>Vigna subterranea</em> L.) landrace differing in seed coat colour

    Seed quality characteristics of a bambara groundnut (<em>Vigna subterranea</em> L.) landrace differing in seed coat colour

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Bambara groundnut (Vigna subterranea L.) is an underutilised African legume that fits the same ecological niche as Arachis hypogea. It is still cultivated using landraces and little is known about their seed quality. The current study evaluated seed quality characteristics...
  8. Ultrastructure of epididymal spermatozoa in three social African mole-rats of the genus <em>Cryptomys</em> (Rodentia: Bathyergidae): conservatism in sperm morphology

    Ultrastructure of epididymal spermatozoa in three social African mole-rats of the genus <em>Cryptomys</em> (Rodentia: Bathyergidae): conservatism in sperm morphology

    Item type: Journal Article • Journal: African Zoology
    The morphology, size and three-dimensional structure of spermatozoa from three representatives of the genus Cryptomys were investigated. To date, there has been no study to either elucidate the morphological features or relative dimensions of spermatozoa in the genus Cryptomys specifically,...
  9. An ultrastructural investigation of <em>Argulus personatus</em> Cunnington, 1913 (Crustacea: Branchiura) from Lake Tanganyika, northern Zambia

    An ultrastructural investigation of <em>Argulus personatus</em> Cunnington, 1913 (Crustacea: Branchiura) from Lake Tanganyika, northern Zambia

    Item type: Journal Article • Journal: African Zoology
    Sixteen male and one female specimen of Argulus personatus Cunnington, 1913, were collected from Bathybates ferox Boulenger, 1898, from Lake Tanganyika in northern Zambia. Light and scanning electron microscopy (SEM) examinations documented a thickening of cuticle located on the dorsal...
  10. A comparison of techniques employed in detection of avian malaria infection, South Africa

    A comparison of techniques employed in detection of avian malaria infection, South Africa

    Item type: Journal Article • Journal: African Zoology
    Avian malaria remains an obscure and mostly unknown avian infection despite the socio-economic threat it poses for poultry industries and its potential to hinder conservation efforts. Therefore, diagnostics for the infection should be expedient, efficient and flexible in applicability. We...