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A Cayley-Hamilton trace identity for 2 × 2 matrices over Lie-solvable rings

Meyer J. Szigeti J. van Wyk L. (2012-01-18)

First we construct an algebra satisfying the polynomial identity [[x,y],[u,v]]=0, but none of the stronger identities [x,y][u,v]=0 and [[x,y],z]=0. Then we exhibit a Cayley-Hamilton trace identity for 2×2 matrices with ...

Accelerated skeletal muscle recovery after in vivo polyphenol administration

Myburgh K.H. Kruger M.J. Smith C. (2012-02-15)

Acute skeletal muscle damage results in fiber disruption, oxidative stress and inflammation. We investigated cell-specific contributions to the regeneration process after contusion-induced damage (rat gastrocnemius muscle) ...

A CFD study of wind patterns over a desert dune and the effect on seed dispersion

Joubert E.C. Harms T.M. Muller A. Hipondoka M. Henschel J.R. (2011)

A critique of the dragonfly delusion hypothesis: Why sampling exuviae does not avoid bias

Bried J.T. D'Amico F. Samways M.J. (2012-01-18)

A cross-species comparison of escape from X inactivation in Eutheria: implications for evolution of X chromosome inactivation

Al Nadaf S. Deakin J.E. Gilbert C. Robinson T.J. Graves J.A.M. Waters P.D. (2011)

Acute and sublethal effects of sequential exposure to the pesticide azinphos-methyl on juvenile earthworms (Eisenia andrei)

Jordaan M.S. Reinecke S.A. Reinecke A.J. (2011)

The use of organophosphate pesticides is an integral part of commercial farming activities and these substances have been implicated as a major source of environmental contamination and may impact on a range of non-target ...

Addiction Research Centres and the Nurturing of Creativity: The Alcohol & Drug Abuse Research Unit at the South African Medical Research Council - strengthening substance abuse research and policy in South Africa Charles Parry etal. Alcohol and Drug Abuse Research Unit, South Africa

Parry C. Morojele N. Myers B. Pluddemann A. (2012-01-18)

Alcohol consumption among HIV-positive pregnant women in KwaZulu-Natal, South Africa: Prevalence and correlates

Desmond K. Milburn N. Richter L. Tomlinson M. Greco E. van Heerden A. van Rooyen H. Comulada W.S. Rotheram-Borus M.J. (2011-10-13)

Background: HIV-positive pregnant women who drink put their children at risk of both HIV and fetal alcohol spectrum disorders. The province of KwaZulu-Natal (KZN) has the highest prevalence of HIV in South Africa, but has ...

Alcohol-induced psychotic disorder: brain perfusion and psychopathology-before and after anti-psychotic treatment

Jordaan G.P. Warwick J.M. Nel D.G. Hewlett R. Emsley R. (2011)

A mathematical modelling approach to assessing the reliability of biomarkers of glutathione metabolism

Geenen S. du Preez F.B. Reed M. Frederik Nijhout H. Gerry Kenna J. Wilson I.D. Westerhoff H.V. Snoep J.L. (2011-10-13)

One of the main pathways for the detoxification of reactive metabolites in the liver involves glutathione conjugation. Metabolic profiling studies have shown paradoxical responses in glutathione-related biochemical pathways. ...

Analytical techniques for wine analysis : an African perspective; a review

de Villiers A. Alberts P. Tredoux A.G.J. Nieuwoudt H.H. (2012-02-22)

Analytical chemistry is playing an ever-increasingly important role in the global wine industry. Chemical analysis of wine is essential in ensuring product safety and conformity to regulatory laws governing the international ...

An analytical pore-scale, shear stress model for purely viscous non-Newtonian fluids traversing porous media

Cloete M. Smit G.J.F. (2011-10-13)

An analytical model for incompressible, generalized Newtonian fluids traversing different types of porous media is proposed. This model is based on the volume averaging of the governing equations. Interstitial quantities ...

An effective fabrication method for ultra thin aluminum structures

de Jager N.J. Perold W.J. Buttner U. (2011-10-13)

In this paper we discuss the various effects on resistivity of thin metal films, concluding that grain boundary scattering and the material's electron-mean-free-path are the dominant factors. We also present an effective ...

A new antigen scanning strategy for monitoring HIV-1 specific T-cell immune responses

Malnati M.S. Heltai S. Cosma A. Reitmeir P. Allgayer S. Glashoff R.H. Liebrich W. Vardas E. Imami N. Westrop S. Nozza S. Tambussi G. Butto S. Fanales-Belasio E. Ensoli B. Ensoli F. Tripiciano A. Fortis C. Lusso P. Poli G. Erfle V. Holmes H. (2012-01-18)

Delineation of the immune correlates of protection in natural infection or after vaccination is a mandatory step for vaccine development. Although the most recent techniques allow a sensitive and specific detection of the ...

An experimental evaluation of the leaching kinetics of PGM-containing Ni-Cu-Fe-S Peirce Smith converter matte, under atmospheric leach conditions

van Schalkwyk R.F. Eksteen J.J. Petersen J. Thyse E.L. Akdogan G. (2011-05-15)

In a first stage atmospheric leach in a typical Sherritt Ni-Cu matte leach process, a Ni-Cu-Fe-S Peirce Smith converter matte is contacted with recycled copper spent electrolyte (an aqueous copper sulphate/sulphuric acid ...

An Investigation into the Influence of Socioeconomic Variables on Gestational Body Mass Index in Pregnant Women Living in a Peri-Urban Settlement, South Africa

Davies H.R. Visser J. Tomlinson M. Rotherham-Borus M.J. LeRoux I. Gissane C. (2011)

Maternal and child mortality rates are still unacceptably high in South Africa. The health status of women in peri-urban areas has been influenced by political and socio-economic factors. Examining socio-economic variables ...

A Note on the Five Lemma

Michael F.I. (2011)

An Overview of Nitrogen Cycling in a Semiarid Savanna: Some Implications for Management and Conservation in a Large African Park

Coetsee C. Jacobs S. Govender N. (2011)

Antibodies reactive to Plasmodium falciparum serine repeat antigen in children with Burkitt lymphoma from Ghana

Guech-Ongey M. Yagi M. Palacpac N.M.Q. Emmanuel B. Talisuna A.O. Bhatia K. Stefan D.C. Biggar R.J. Nkrumah F. Neequaye J. Tougan T. Horii T. Mbulaiteye S.M. (2011-10-13)

The role of protective immunity to Plasmodium falciparum (Pf) malaria in Burkitt lymphoma (BL) is unknown. We investigated the association between BL and antibodies reactive to SE36 antigen, a recombinant protein based on ...

An ultrastructural investigation of the surface microbiota present on the leaves and reproductive structures of the resurrection plant Myrothamnus flabellifolia

Moore J.P. Waldron M. Lindsey G.G. Farrant J.M. Brandt W.F. (2011-05-15)

The leaves, flower and stems of the southern African angiosperm resurrection plant Myrothamnus flabellifolia were investigated at the ultrastructural level to determine the source of previously reported fungal contamination. ...

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