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Now showing items 3070-3089 of 11784
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The effect of different diets on the reproduction of two species of mosquitoes, Aedes aegypti and Culex pipiens.
(2013-11-11)Larvae of Culex quinquefasciatus and Aedes aegypti were raised on five different diets and the effects thereof on various parameters was studied. The diets used were: A = Pronutro and Tastee wheat, B = Epo 1 rat cubes, C= ... -
The effect of different furrow irrigation regimes on infiltration and sugarcane (Saccharum officinarum L.) yield at Ubombo Swaziland.
(2014-11-28)In surface irrigation, the soil serves as a medium for infiltration and for conveying water from the upstream to the downstream end of a field. Soil infiltration characteristics are therefore extremely important for ... -
The effect of different methods of controlling urolithiasis on ovine mineral metabolism.
(2015-01-27)The widespread use of high-energy, low roughage diets among feedlot sheep has lead to the development of several production diseases (Bide et al., 1973). One of the least easily identifiable is urolithiasis, yet it is ... -
The effect of diluent on the bacterial reaction to disinfectants.
(2015-04-07)No abstract available. -
Effect of displacement feedback control on the frequencies of cantilevered beams with tip mass and axial load using piezo actuators.
(2014-09-05)This work provides a study of the natural frequencies of a cantilevered beam with tip mass and axial load. Displacement feedback control is applied using piezo actuators attached to the top and bottom of the beam. The ... -
The effect of distance from clinics on maternal and child health (MCH) service utilization and MCH status.
(2004)There is strong evidence from developing countries to support the hypothesis that physical accessibility of health services, particularly absolute distance from clinics, is a major determinant of health service utilization ... -
The effect of education on smallholder pig farmers' knowledge, practices and pig productivity in the Angónia District, Mozambique.
(2015)Smallholder pig production provides an important contribution for farmer livelihoods in many African developing countries. However, there are many constraints that limit pig performance and thus financial outcome. The ... -
The effect of elevated atmospheric CO2 on the growth and physiology of Chromolaena odorata.
(2008)Rising atmospheric CO2 (Ca) concentrations have generated concern among scientists, mainly because of CO2’s role as a greenhouse gas and its influence on plant growth and development. Previous research has suggested that ... -
The effect of elevated CO2 levels on the growth of two Acacia species.
(2001)Climate change, induced by increases in the concentration of greenhouse gases in the atmosphere, can affect the growth and community structure of ecosystems in two ways. Firstly directly through changes in atmospheric ... -
The effect of elevated glutathione reductase and superoxide dismutase activities in stressed transgenic tobacco.
(1996)Life as we know it would be impossible in the absence of oxygen. However, too much oxygen can be toxic to the aerobic organisms which depend on it for their very existence. This apparent paradox arises as a result of ... -
The Effect of exhaustive exercise on lymphocyte apoptosis.
(2001)Post exercise lymphocytopenia is a well documented phenomenon. Studies have reported exercise induced DNA damage in leucocytes and have postulated a possible link to apoptosis. Five subjects of differing fitness levels ... -
The effect of feed type and diet quality on kinetics of digestion : the degradation properties of certain protein supplements, and the effect of concentrate supplementation and basal roughage quality on eating behaviour and particle passage from the rumen of sheep.
(2014-12-17)The unique anatomical structure of the ruminant animals' digestive tract allows them to convert forages containing high levels of fibre into the valuable products of meat, milk and wool. At the same time, an interdependent ... -
Effect of fermentation and nutritional conditions on the profile of flavour active ester compounds in beer.
(2013-06-04)During fermentation, the yeast Saccharomyces cerevisiae produces a broad range of aroma-active esters that are important for the desirable complex flavour of beer. The sensory threshold levels of these esters in beer are ... -
Effect of fire frequency on herbivore distribution and behaviour in the Kruger National Park, South Africa.
(2013-11-14)Fire plays an important role in structuring and maintaining savanna grassland ecosystems. Although regular fires are a characteristic feature of savannas, the effects of fire frequency on these systems are less well ... -
The effect of form of nitrogen on the efficiency of protein synthesis by rumen bacteria in continuous culture.
(2015-02-12)The aim of this study was to examine the effect of the form of nitrogen available to mixed rumen bacteria on the efficiency of microbial protein synthesis. A novel, solid substrate, continuous culture fermentor which ... -
The effect of fretting marks introduced during strand winding on the fatigue performance of transmission line conductors.
In this research, the Elasto-plastic interlayer contact of the TERN ACSR conductor used on Eskom’s 400kV transmission lines is investigated. Characterization of the elliptical contact marks using eucentric tilting in SEM ... -
The effect of Gamma radiation (60Co) on the postharvest physiology of Musa acuminata collar cv. Dwarf Cavendish.
(1991)Bananas are climacteric fruits and show climacteric patterns with respect to both their ethylene production and respiration rates during the ripening process. Treatment with ethylene accelerated the ripening process, ... -
The effect of genetic improvement, fertilisation, weed control and regeneration method on the establishment and performance of Eucalyptus macarthurii and Eucalyptus nitens.
(2005)Eucalyptus grandis was introduced into South Africa in the 19th century, and has since become the most important of the hardwood plantation tree species grown for pulp. Until the late 1980's E. grandis was virtually the ... -
The effect of genotype, drying conditions and microbial enzyme supplementation of the nutritive value of hybrid and open pollinated maize grain for broiler feeding.
(2014-12-17)Three experiments were conducted to examine the effects of tannin inclusion in the diet; heat treatment of maize; and maize genotype and sex of broilers; on the nutritive value of maize-soyabean based diets, as affected ... -
The effect of group size and floor-space allowance on the efficiency of lysine utilisation by growing pigs.
(2005)Two experiments were conducted for this thesis, to determine whether an animal should be fed to its genetic potential in spite of this not being achievable due to an on-farm constraint. The first experiment was designed ...
