University of Port Elizabeth

About: University of Port Elizabeth is a based out in . It is known for research contribution in the topics: Population & Estuary. The organization has 1067 authors who have published 1538 publications receiving 38560 citations. The organization is also known as: UPE & Universiteit van Port Elizabeth.

A DSC study of curative interactions. I, The interaction of ZnO, sulfur, and stearic acid

Abstract: The interaction between combinations of sulfur, stearic acid, and ZnO were studied by differential scanning calorimetry in the absence of rubber. The only reaction observed was between ZnO and stearic acid. A small amount of zinc stearate formed as soon as the stearic acid melted, but the solid product blocked further reaction, which was only completed at 154°C. Water played a major role in the reaction, and in the presence of water, the reaction went to completion at lower temperatures. Sulfur, too, affected the temperature of the ZnO/stearic acid reaction. The preparation of zinc stearate by a number of routes was investigated.

Childhood Career Development Scale: Scale Construction and Psychometric Properties.

Abstract: The purpose of this investigation was to construct a theoretically driven and psychometrically sound childhood career development scale to measure career progress in fourth- through sixth-grade chi...

Seasonal variation of diet and faeces composition of Black Rhinoceros Diceros Bicornis in the Addo Elephant National Park

Abstract: The feeding habits of black rhinoceros were studied in the Addo Elephant National Park, Republic of South Africa, using the "feeding track" method and recording bites taken. A total sample of 59 feeding tracks, 5 540 plants and 17 191 bites were recorded from June 1976 to March 1977. The rhino fed largely on woody shrubs but also took forbs, grass and succulent plants. During dry periods the rhino were selecting succulent plants with a high moisture content rather than woody plants. A total of 111 plant species were utilized. During dry months the feeding rate was greater than wet months. Physical analysis of faeces composition confirmed conclusions drawn from observations. Chemical analyses of faeces indicated that mean crude protein values varied with rainfall and herbage quality, ash values were strongly influenced by the intake of plant roots and dust during dry periods, acid detergent fibre was highest during unfavourable periods and low during favourable periods.

The challenge of motivating top management: a need satisfaction perspective

Abstract: The effective participation of South African firms in the global economy depends on how competitively affordable and quality goods and services can be produced by the productive utilisation of materials, machines, money and human resources. Opsomming Die doekreffende deelname deur Suid-Afrikaanse firmas aan die wereldekonomie hang at van hoe mededingend kwaliteit en bekostigbare goedere en dienste gelewer kan word deur die produktiewe aanwending van grondstowwe, masjinerie, geld en arbeid.