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Now showing items 63-82 of 2116
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Alteration of Bax-to-Bcl-2 ratio modulates the anticancer activity of methanolic extract of Commelina benghalensis (Commelinaceae) in Jurkat T cells
(Academic Journals, 2008)Stem extracts of Commelina benghalensis (Linn.), although not extensively documented, are frequently used in traditional medicine for the treatment of ailments such as skin malformations and outgrowths. Accordingly, the ... -
Alternative perspectives on orality, literacy and education: a view from South Africa.
(Routledge, 2001)The question of the 'great divide' between orality and literacy has been critically addressed by various scholars of literacy, including social literacy theorists. This paper uses the notions of primary and secondary ... -
Alzheimer's disease: a nursing-perspective
(University of the Western Cape, 2007)INTRODUCTION: Alzheimer's disease presents a challenge for nursing, nurses, formal and informal carer's of person's with Alzheimer's disease. Theoretical knowledge provides insight and understanding into the bio-psycho-social ... -
Am I my brother’s keeper? on personal identity and responsibility
(Philosophical Society of Southern Africa, 2013)The psychological continuity theory of personal identity has recently been accused of not meeting what is claimed to be a fundamental requirement on theories of identity - to explain personal moral responsibility. Although ... -
The ambiguity of Johan Heyns: Sitting at Bavinck's left or right hand?
(SUN, 2013)Following some biographic introductory comments, the argument of this contribution proceeds in two steps. First, the distinction between Herman Bavinck's left and right hand is clarified, amongst others with reference ... -
The ambiguity of Johan Heyns: sitting at Bavinck's left or right hand? : the Reformed Churches in South Africa and the struggle for justice : remembering 1960-1990
(2013)Following some biographic introductory comments, the argument of this contribution proceeds in two steps. First, the distinction between Herman Bavinck’s left and right hand is clarified, amongst others with reference to ... -
Amino acids 1055 to 1192 in the S2 Region of severe acute respiratory syndrome Coronavirus S Protein induce neutralizing antibodies: Implications for the development of vaccines and antiviral agents
(American Society for Microbiology, 2005)The spike (S) protein of the severe acute respiratory syndrome coronavirus (SARS-CoV) interacts with cellular receptors to mediate membrane fusion, allowing viral entry into host cells; hence it is recognized as the primary ... -
Amorphous Pt@dCu/CNT catalyst for methanol elextrooxidation
(South African Chemical Institute (SACI), 2013)A multi-walled carbon nanotube-supported, Pt decorated nano-sized amorphous PdCu alloy cores (denoted as Pt@PdCu/CNT) catalyst with lower Pt loading is synthesized via a galvanic displacement reaction. The structure is ... -
Amphibious Horses: Beings in the Littoral and Liminal Contact Zones
(2013)Horses galloping in littoral zones are represented as embodying wildness, freedom and a prelapsarian quality. Roy Campbell’s ‘The Horses of the Camargue’ includes themes which recur in texts about littoral horses: the ... -
An investigation into current attitudes towards English at the University of the Western Cape
(Stellenbosch University, 1997)This work-in-progess paper describes the writer's current research into the language attitudes, preferences and usage of the student speech community at the University of the Western Cape. It specifically looks at responses ... -
An overview of recent changes to corporate governance frameworks as it pertains to executive remuneration
(University of Fort Hare, 2012) -
An unconditionally stable nonstandard finite difference method applied to a mathematical model of HIV infection
(De Gruyter Open, 2013)We formulate and analyze an unconditionally stable nonstandard finite difference method for a mathematical model of HIV transmission dynamics. The dynamics of this model are studied using the qualitative theory of dynamical ... -
Anaerobes and bacterial vaginosis in pregnancy: virulence factors contributing to vaginal colonisation
(Multidisciplinary Digital Publishing Institute, 2014)The aetiology and pathogenesis of bacterial vaginosis (BV) is unclear but it appears to be associated with factors that disrupt the normal acidity of the vagina thus altering the equilibrium between the normal vaginal ... -
Analysing the professional development of teaching and learning from a political ethics of care perspective
(Routledge, 2014)This paper uses Tronto’s political ethics of care as a normative framework to evaluate a model of teaching and learning professional development. This framework identifies five integrated moral elements of care – ... -
Analysis of human resources for health strategies and policies in 5 countries in Sub-Saharan Africa, in response to GFATM AND Pepfar-funded HIV-activities
(BioMed Central -The Open Access Publisher, 2013)BACKGROUND: Global Health Initiatives (GHIs), aiming at reducing the impact of specific diseases such as Human Immunodeficiency Virus (HIV), have flourished since 2000. Amongst these, PEPFAR and GFATM have provided ... -
The analysis of indexed astronomical time series – X. Significance testing of O − C data
(Oxford University Press, 2006)It is assumed that O − C (‘observed minus calculated’) values of periodic variable stars are determined by three processes, namely measurement errors, random cycle-to-cycle jitter in the period, and possibly long-term ... -
The analysis of indexed astronomical time series – XI. The statistics of oversampled white noise periodograms
(Oxford University Press, 2015)The distribution of the maxima of periodograms is considered in the case where the time series is made up of regularly sampled, uncorrelated Gaussians. It is pointed out that if there is no oversampling, then for large ... -
The analysis of indexed astronomical time series – XII. The statistics of oversampled Fourier spectra of noise plus a single sinusoid
(Oxford University Press, 2015)With few exceptions, theoretical studies of periodogram properties focus on pure noise time series. This paper considers the case in which the time series consists of noise together with a single sinusoid, observed at ... -
The analysis of irregularly observed stochastic astronomical time-series – I. Basics of linear stochastic differential equations
(Oxford University Press, 2005)The theory of low-order linear stochastic differential equations is reviewed. Solutions to these equations give the continuous time analogues of discrete time autoregressive time-series. Explicit forms for the power ... -
An analysis of pulsation periods of long period
(Royal Statistical Society, 2007)Summary: We report the results of a period change analysis of time series observations for 378 pulsating variable stars. The null hypothesis of no trend in expected periods is tested for each of the stars. The tests are ...
