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Browsing Faculty of Natural Sciences@PUK by Title

Now showing items 223-242 of 709

Erratum to "Observations of the sagittarius dwarf galaxy by HESS experiment and search for a dark matter signal" [Astropart. Phys. 29(1) (2008) 55–62]

Aharonian, F; Bazer-Bachi, A R; Benbow, W; Bolz, O; Rowell, G; Schwanke, U; Braun, I; De Jager, Ocker Cornelis; Hermann, G; Jacholkowska, A (Elselvier, 2010)
Erratum: 'The first fermi large area telescope catalog of gamma-ray pulsars''

Venter, Christo (IOP Publishers, 2011)
Estimating an effect size in one-way multivariate analysis of variance (MANOVA)

Ellis, Susanna M; Steyn, H S (Psychology Press, 2009)
Estimating the birth period of pulsars through GLAST LAT observations of their wind nebulae

De Jager, Ocker C (IOP Publishing LimitedAmerican Astronomical Society, 2008)
Estimation of human body concentrations of DDT from indoor residual spraying for malaria control

Bornman, Riana; Bouwman, Hindrik; Fritsche, Lukas; Gyalpo, Tenzing; Scheringer, Martin (Elsevier, 2012)

Inhabitants of dwellings treated with DDT for indoor residual spraying show high DDT levels in blood and breast milk. This is of concern since mothers transfer lipid-soluble contaminants such as DDT via breastfeeding to ...
Ethanol production from tropical sugar beet juice

Brandling, Janine Ellen; Marx, Sanette; Van der Gryp, Percy (Academic journals, 2012)

Starch and sugar resources have been extensively researched to find a suitable renewable source of energy to supplement the world’s ever increasing demand for energy while also abating global warming by stemming the addition ...
Eustigmaeus setiferus, n. sp. (Acari: Stigmaeidae) from Iran

Ueckermann, Edward Albert; Bagheri, Mohammad; Saber, Moosa; Ghorbani, Hamed; Navaei, Reza (Taylor & Francis, 2011)
Evaluating threats to an endangered species by proxy: Air pollution as threat to the blue swallow (Hirundo atrocaerulea) in South Africa

Bouwman, Henk; Evans, Steven William; Kylin, H (Springer, 2010)
Evaluation of charge density and the theory for calculating membrane potential for a nano-composite nylon-6,6 nickel phosphate membrane

Arfin, T.; Falch, A.; Kriek, R.J. (Royal Society of Chemistry, 2012)

A new crystalline organic–inorganic nano-composite nylon-6,6 nickel phosphate membrane was synthesised subsequent to which (a) the physico-chemical characteristics of the membrane were evaluated employing FTIR, SEM, EDX, ...
Evaluation of organic matter stability in wood compost by chemical and thermogravimetric analysis

Friedrich, A.; Blumenstein, O.; Nada, W.M.; Van Rensburg, L.; Claassens, S.; Claassens, S. (University of Tehran (Graduate Faculty of Environment), 2012)

This study investigated maturation and stability levels during composting of Quercus robur (QR) woodchips mixed with different nitrogen sources (horse manure, HM and lake mud, LM) for potential agronomic utilisation. The ...
The evolution of environmental assessment debates: critical perspective from South Africa

Retief, Francois Pieter (Imperial College Press, 2010)
Experiences in monitoring and assessment of sustainable land management

Kellner, Klaus (John Wiley & Sons, Ltd., 2010)
Experimental and reaction kinetic investigation of 1-octene metathesis reaction with Hoveyda-Grubbs first generation precatalyst

Van der Gryp, Percy; Marx, Sanette; Vosloo, Hermanus C.M. (Elsevier, 2012)

In this study we report the catalytic performance, reaction engineering kinetics and elucidation of the reaction mechanism using density functional theory (DFT) for the metathesis reaction of 1-octene in the presence of ...
The experimental evaluation and molecular dynamics simulation of a heat-enhanced transdermal delivery system

Otto, Daniel P.; De Villiers, Melgardt M. (2013)

Transdermal delivery systems are useful in cases where preferred routes such as the oral route are not available. However, low overall extent of delivery is seen due to the permeation barrier posed by the skin. Chemical ...
Experimental rodent models of Type 2 Diabetes: A Review

Loots, Du Toit; Islam, M S (Thomson Reuters, 2009)
Experimental, DFT and kinetic study of 1-octene metathesis with Hoveyda-Grubbs second generation precatalyst

Van der Gryp, Percy; Marx, Sanette; Vosloo, Hermanus C.M. (Elsevier, 2012)

In this study we report the catalytic performance, reaction engineering kinetics and elucidation of the reaction mechanism using density functional theory (DFT) for the metathesis reaction of 1-octene in the presence of ...
Experiments to improve forecasting accuracy of regression models with minimal assumptions

Van der Westhuizen, Magderie; Hattingh, Giel; Kruger, Hennie (Tadbir Operational Research Group, 2010)

The forecasting accuracy of a regression model relies heavily on the applicability of the assumptions made by the model builder. In addition, the presence of outliers may also lead to models that are not reliable and thus ...
An exploratory study of some of the determinants of managements succession planning in family businesses

Ellis, Susanna M; Van der Merwe, Stephan; Venter, Elmarie (Southern African Institute for Management Scientists, 2009)

This study highlights the importance of management succession planning in small and medium-sized family businesses. The primary objective of this study is twofold : firstly to identify the potential influence of selected ...
Exploring a SNR/molecular cloud association within HESS J1745-303

Aharonian, F.; Raubenheimer, Barend; Venter, Christo; Holleran, Mathew; Büsching, I.; De Jager, Ocker (EDP Sciences, 2008)
Exploring differences of soil quality as related to management in semiarid rangelands in the western Bophirima Distrct, North West province, South Africa

Moussa, Abdoulaye Saley; Kellner, Klaus; Van Rensburg, Leon; Bationo, A (Taylor & Francis, 2009)