188,286 research outputs found
Letter from field cornet H.P.N. Pretorius to Colonel Owen Lanyon
No full textleyds-60-7410.pdf created from original pamphlet in the WJ Leyds Collection held in the Africana Section of the Stellenbosch University Library and Information Service.Field cornet, H.P.N. Pretorius' letter to Colonel Owen Lanyon on the subject of probable hostilities
Assimilable nitrogen utilisation and production of volatile and non-volatile compounds in chemically defined medium by Saccharomyces cerevisiae wine yeasts
No full textSurveys conducted worldwide have shown that a significant proportion of grape musts are suboptimal for yeast nutrients, especially assimilable nitrogen. Nitrogen deficiencies are linked to slow and stuck fermentations and sulphidic off-flavour formation. Nitrogen supplementation of grape musts has become common practice; however, almost no information is available on the effects of nitrogen supplementation on wine flavour. In this study, the effect of ammonium supplementation of a synthetic medium over a wide range of nitrogen values on the production of volatile and non-volatile compounds by two high-nitrogen-demand wine fermentation strains of Saccharomyces cerevisiae was determined. To facilitate this investigation, a simplified chemically defined medium that resembles the nutrient composition of grape juice was used. Analysis of variance revealed that ammonium supplementation had significant effects on the concentration of residual sugar, L-malic acid, acetic acid and glycerol but not the ethanol concentration. While choice of yeast strain significantly affected half of the aroma compounds measured, nitrogen concentrations affected 23 compounds, including medium-chain alcohols and fatty acids and their esters. Principal component analysis showed that branched-chain fatty acids and their esters were associated with low nitrogen concentrations, whereas medium-chain fatty esters and acetic acid were associated with high nitrogen concentrations.M. Vilanova, M. Ugliano, C. Varela, T. Siebert, I. S. Pretorius and P. A. Henschk
Meningiomas occurring during long-term survival after treatment for childhood cancer
No full textChildhood cancer is rare but improvements in treatment over the past five decades have resulted in a cohort of more than 30,000 long-term survivors of childhood cancer in the UK with more added annually. These long-term survivors are at risk of late effects of cancer treatment which replace original tumour recurrence as the leading cause of premature death. Second neoplasms are a particular risk and in the central nervous system meningiomas occur increasingly with increased radiation dose to central nervous system tissue and length of time after exposure, resulting in a 500-fold increase above that expected in the normal population by 40 years of follow up. This multidisciplinary author group and others met to discuss the issue. Our pooled information, and consensus that screening should only follow symptoms, was published online by the Royal College of Radiologists in 2013. We outline here the current knowledge and management of these neoplasms secondary to childhood cancer treatment
Responsible Investment: A Vehicle for Environmentally Sustainable Economic Growth in South Africa
No full textThis paper explores whether any investment products or strategies in South Africa take environmental sustainability into account. By looking at how environmental, social, and governance (ESG) criteria are used in investment decision making, we found that most socially-responsible investment products and responsible investment strategies largely focus on infrastructure, development, and black economic empowerment. Environmental criteria do not yet receive comparable attention from South African asset managers and owners. Mainstreaming responsible investment principles will need to come from either an increase in demand for such practices by asset owners or from company positions on ESG issues.responsible investment, socially responsible investment, pension funds, asset managers, screening, active share ownership
Ouditkunde : akademiese ontwikkeling van 'n professionele bedrewenheid / J.P.S. Pretorius
No full textPretorius Street, showing Transvaal Hotel and Opera House, Pretoria
No full textColoured postcard printed at the beginning of the 20th century, from the thesis "A Pretoria City Block" by A. P. S. Voutsas and R. Findlay, presented for the degree of Bachelor of Architecture at the University of the Witwatersrand in 1949.Forms part of the A.P.S. Voutsas Collection.View down Pretorius Street in Pretoria in early 1900, showing the Transvaal Hotel and the Opera House
Plan of Clifton, Pretorius Kloof, Sneeuwbergen
No full text247.A.1.A.5.1(38).jpg derived from archival TIFF file. Digital copies were created from a selection of drawings in the original James Walton manuscript collection (MS 247) held in the Manuscripts Section of the Stellenbosch Library and Information Service Collection.This illustration was published in Homesteads and villages of South Africa by James Walton. Pretoria : Van Schaik, 1965, p.58.Sketch plan of Clifton (Pretorius Kloof), depicting detail of a stoep, 3 bedrooms, a voorhuis, a livingroom, an arch, 3 rooms, 2 hearths, a store, an achterhuis and a kitchen. Detail is also provided of the original building and later additions
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Supplemental Material - Exploring the contextual factors that impact the dementia family caregiving experience in Soweto township, South Africa
No full textSupplementary Material for Exploring the contextual factors that impact the dementia family caregiving experience in Soweto township, South Africa by Aqeela Mahomed and Chrisma Pretorius in Dementia</p
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