Articles by Author: Tamar Janelidze Gray

Search results for Tamar Janelidze Gray

We found 42 results for you
  1. A note on admissibility of closed Galois structures

    A note on admissibility of closed Galois structures

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We present a new admissibility theorem for Galois structures in the sense of G. Janelidze. It applies to relative exact categories satisfying a suitable relative modularity condition, and extends the known admissibility theorem in the theory of generalized central extensions...
  2. The effect of stocking rate and grazing system on the performance of beff steers grazing an

    The effect of stocking rate and grazing system on the performance of beff steers grazing an

    Animal average daily growth shows a characteristic drop in the spring/early summer period (until 31 December), a slight increase over the mid‐summer period (January/February) and a rapid decline in autumn (March). Growth ranges from 0,8 to 0,5 kg/animal/day in spring/early...
  3. The performance of tropical pastures in the drier phase of the Highland sourveld of Natal

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Several tropical grasses (Acroceras macrum, Cenchrus ciliaris, Cyndon sp., Digitaria sp. and Pennisetum clandestinum) and legumes (Desmodium uncinatum and Lotononis bainesii) were evaluated at the Kokstad Research Station (Bioclimatic sub‐region 4f of Natal) over a period of seven years. The...
  4. The influence of nitrate and ammonium forms of nitrogen fertilizer on the growth and osmoregulation of <em>digitaria eriantha</em> and <em>Chloris gayana</em> grown under saline conditions

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Digltaria eriantha and Chloris gayana were grown under controlled conditions for three months and were treated with a nutrient solution containing 150 mMol NaCl and the following nitrogen sources: 25 or 200 mg/l NH4 +‐N or NO3 −‐N or no...
  5. The performance of beef cows on <em>Digitaria eriantha</em> silage

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Digitaria eriantha silage, ensiled when the plants were in the late flowering stage (March), was fed ad lib to mature, non‐pregnant, dry Hereford cows from mid‐May to mid‐September. The average daily gain during a 98‐day feeding period was 0,35 kg/cow...
  6. Cabbage seed germination for the assessment of adjuvant effects on 2, 4-D iso-octyl ester volatility

    Cabbage seed germination for the assessment of adjuvant effects on 2, 4-D iso-octyl ester volatility

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The germination rate of cabbage seeds (Brassica oleracea cv. Hercules) exposed to the vapour of the 2,4-dichlorophenoxy iso-octyl ester (2,4-D IOE) was used in a bioassay to determine the effectiveness of commercial adjuvants in reducing the volatility of this hormonal...
  7. ON FLATNESS RELATIVE TO A TORSION THEORY

    ON FLATNESS RELATIVE TO A TORSION THEORY

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    For a torsion radical, σ, σ-flatness (as defined in [8]) is studied. Many of the properties of flat modules are shown to extend and σ-flat modules are characterized under certain restrictions on the associated filter, Lσ. We also define semi-σ-flat...
  8. ON RELATIVE INJECTIVITY

    ON RELATIVE INJECTIVITY

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We investigate the σ-injectivity of O. Goldman and other related types of relative injectivity when σ is an arbitrary torsion radical, and when the associated filter satisfies some standard finiteness conditions.
  9. Rawls’s Principle of Justice as Fairness and Its Application to the Issue of Same-Sex Marriage

    Rawls’s Principle of Justice as Fairness and Its Application to the Issue of Same-Sex Marriage

    Item type: Journal Article • Journal: South African Journal of Philosophy
    This essay applies the principle of justice as fairness to the issue of same-sex marriage. I will outline Rawls’s theory of justice, including the original position and the veil of ignorance as the means by which choosers craft a just...
  10. THE EFFECTS OF DESIGN AND OPERATION ON THE EFFICIENCY OF HOSEPIPES AS WATER COLUMN SAMPLERS FOR PHYTOPLANKTON

    THE EFFECTS OF DESIGN AND OPERATION ON THE EFFICIENCY OF HOSEPIPES AS WATER COLUMN SAMPLERS FOR PHYTOPLANKTON

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The efficiency of 5 different hosepipe samplers in providing representative water column samples was tested by comparing the chlorophyll a concentrations in these samples with those obtained by integrating discrete depth samples collected with a Van Dorn sampler, in two...