419 results on '"van der Merwe S"'
Search Results
102. PND33 REFILL-ADHERENCE RATES OF ANTIPARKINSON MEDICATION IN THE PRIVATE HEALTH CARE SECTOR OF SOUTH AFRICA
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Van der Merwe, S, primary, Lubbe, MS, additional, Du Plessis, JM, additional, and Bekker, E, additional
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- 2010
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103. South African native trees increasingly threatened by diseases
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Roux, J., primary, Van der Merwe, S., additional, Malan, E., additional, Van Rooyen, M.W., additional, and Wingfield, M.J., additional
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- 2010
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104. An investigation of the determinants of estate and retirement planning in intergenerational family businesses
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Van Der Merwe, S. P., primary
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- 2009
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105. Determinants of family employee work performance and compensation in family businesses
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Van Der Merwe, S. P., primary
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- 2009
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106. A Large-Scale Automated Method for Hepatocyte Isolation: Effects on Proliferation in Culture
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Nieuwoudt, M. J., primary, Kreft, E., additional, Olivier, B., additional, Malfeld, S., additional, Vosloo, J., additional, Stegman, F., additional, Kunneke, R., additional, Van Wyk, A. J., additional, and Van Der Merwe, S. W., additional
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- 2005
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107. Reply to Matsumoto et al.
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van der Merwe, S. W., primary, Duncan, I. C., additional, Bond, R. P., additional, and Kok, K., additional
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- 2004
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108. Distal Embolization and Local Vessel Wall Ulceration after Gastric Variceal Obliteration with N-Butyl-2-Cyanoacrylate: a Case Report and Review of the Literature
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Kok, K., primary, Bond, R., additional, Duncan, I., additional, Fourie, P., additional, Ziady, C., additional, van den Bogaerde, J., additional, and van der Merwe, S., additional
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- 2004
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109. Inventory of free-ranging lions Panthera leo in Africa
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Bauer, H., primary and Van Der Merwe, S., additional
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- 2004
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110. A Model-Based Techno-Economic Comparison of Optical Access Technologies.
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van der Merwe, S., Gruber, C.G., Grigoreva, Y., and Kessler, T.
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- 2009
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111. The cytotoxic effects of a traditional Zulu remedy, impila (Callilepis laureola)
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Stewart, M J, primary, Steenkamp, V, additional, Van der merwe, S, additional, Zuckerman, M, additional, and Crowther, N J, additional
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- 2002
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112. Evaluation of a Novel Heminested PCR Assay Based on the Phosphoglucosamine Mutase Gene for Detection of Helicobacter pylori in Saliva and Dental Plaque
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Goosen, C., primary, Theron, J., additional, Ntsala, M., additional, Maree, F. F., additional, Olckers, A., additional, Botha, S. J., additional, Lastovica, A. J., additional, and van der Merwe, S. W., additional
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- 2002
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113. The effect of Senecio latifolius a plant used as a South African traditional medicine, on a human hepatoma cell line
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Steenkamp, V, primary, Stewart, M.J, additional, van der Merwe, S, additional, Zuckerman, M, additional, and Crowther, N.J, additional
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- 2001
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114. Anaerobic Bacteremia and Necrotizing Fasciitis in a Patient with Crohn's Disease
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van der Merwe, S. W., primary, Pretorius, E., additional, Elloitt, E., additional, and Blaine, R., additional
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- 2001
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115. Synchronization of estrus in sheep using progestagen and inseminating with chilled semen during the breeding season
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Greyling, J.P.C., primary, Erasmus, J.A., additional, Taylor, G.J., additional, and van der Merwe, S., additional
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- 1997
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116. Totale welstand: 'n Nuwe dimensie in die beheer van gesondheidsorg-,werkersafwesigheids- en personeelomsetkostes
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Dreyer, L. I., primary, Strydom, G. L., additional, and Van der Merwe, S., additional
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- 1997
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117. Die voorkoms van lewenstylverwante koronêre risikofaktore by Suid-Afrikaanse bestuurslui
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Dreyer, L.I., primary, Strydom, G.L., additional, and Van der Merwe, S., additional
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- 1996
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118. 6-Thioguanine Treatment in Inflammatory Bowel Disease: A Critical Appraisal by a European 6-TG Working Party.
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De Boer, N. K. H., Reinisch, W., Teml, A., Van Bodegraven, A. A., Schwab, M., Lukas, M., Ochsenkühn, T., Petritsch, W., Knoflach, P., Almer, S., Van Der Merwe, S. W., Herrlinger, K. R., Seiderer, J., Vogelsang, H., and Mulder, C. J. J.
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INFLAMMATORY bowel diseases ,ULCERATIVE colitis ,CROHN'S disease ,HEPATOTOXICOLOGY ,THERAPEUTICS - Abstract
Recently, the suggestion to use 6-thioguanine (6-TG) as an alternative thiopurine in patients with inflammatory bowel disease (IBD) has been discarded due to reports about possible (hepato) toxicity. During meetings arranged in Vienna and Prague in 2004, European experts applying 6-TG further on in IBD patients presented data on safety and efficacy of 6-TG. After thorough evaluation of its risk-benefit ratio, the group consented that 6-TG may still be considered as a rescue drug in stringently defined indications in IBD, albeit restricted to a clinical research setting. As a potential indication for administering 6-TG, we delineated the requirement for maintenance therapy as well as intolerance and/or resistance to aminosalicylates, azathioprine, 6-mercaptopurine, methotrexate and infliximab. Furthermore, indications are preferred in which surgery is thought to be inappropriate. The standard 6-TG dosage should not exceed 25 mg daily. Routine laboratory controls are mandatory in short intervals. Liver biopsies should be performed after 6–12 months, three years and then three-yearly accompanied by gastroduodenoscopy, to monitor for potential hepatotoxicity, including nodular regenerative hyperplasia (NRH) and veno-occlusive disease (VOD). Treatment with 6-TG must be discontinued in case of overt or histologically proven hepatotoxicity. Copyright © 2006 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]
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- 2006
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119. Short Report Molecular diagnosis of hereditary hemochromatosis: application of a newly-developed reverse-hybridization assay in the South African population.
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Kotze, M.J., de Villiers, J.N.P., Bouwens, C.S.H., Warnich, L., Zaahl, M.G., van der Merwe, S., and Oberkanins, C.
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HEMOCHROMATOSIS ,MOLECULAR diagnosis ,GENETIC mutation ,CAUCASIAN race ,ENZYME analysis - Abstract
Kotze MJ, de Villiers JNP, Bouwens CSH, Warnich L, Zaahl MG, van der Merwe S, Oberkanins C. Molecular diagnosis of hereditary hemochromatosis: application of a newly-developed reverse-hybridization assay in the South African population. A recently developed strip-assay for hemochromatosis provides a rapid method for simultaneous detection of multiple mutations, which among others includes the HFE gene mutations V53M, V59M, H63D, H63H, S65C, Q127H, E168Q, and C282Y, previously detected in the general South African population using gel-based mutation-screening methods. The objective of the study was to determine the frequency of the relatively rare mutations in samples selected for altered iron parameters or a family history of hereditary hemochromatosis (HH) as part of the validation process of the assay for routine diagnostic purposes. The study population consisted of 451 individuals previously screened for mutations C282Y and H63D by restriction enzyme analysis in order to confirm or possibly exclude a diagnosis of HH. These individuals were subjected to mutation screening using the commercially available hemochromatosis strip-assay. Previous positive results for mutations C282Y and H63D in 233 individuals confirmed the accuracy of the reverse-hybridization assay. Mutation S65C was detected in 13 Caucasians, including three compound heterozygotes. These constituted 2% (13/600) of the chromosomes without mutations C282Y or H63D. The African-specific HFE mutation V53M was detected in one out of 11 (9%) African subjects screened. Mutation E168Q was detected in a single Caucasian individual together with mutation H63D. Our data demonstrate the value of the strip-based technology in providing a rapid and reliable comprehensive test for simultaneous analysis of multiple mutations. [ABSTRACT FROM AUTHOR]
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- 2004
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120. A once-a-day dosage form for the delivery of insulin through the nasal route: in vitroassessment and in vivoevaluationElectronic supplementary information (ESI) available: Confocal light microscopy images of propidium iodide staining of the Transwell©inserts to visualise cell death. Glucose-lowering effects of non-insulin loaded intranasal formulations have also been presented. See DOI: 10.1039/c2bm00132b
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NazarPresent address: Department of Pharmacy, H., Health, Wellbeing, Sunderland, University of, Sunder, Caliceti, P., Carpenter, B., El-Mallah, A. I., Fatouros, D. G., Roldo, M., van der Merwe, S. M., and Tsibouklis, J.
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An in situthermogelling, mucoadhesive formulation based on N-trimethyl chitosan chloride has been evaluated for its potential to affect the transmucosal delivery of insulin viathe nasal route. In vitrostudies at a physiologically relevant temperature (ca. 35 °C) have shown that the formulation releases most of its insulin load (ca. 70%) in a non-Fickian manner during the timescale over which the sol-to-gel transition (ca. 8 min) takes place, and also that, once gelation is complete, the release of the remainder of the therapeutic content follows first order kinetics over at least sixty minutes. Investigations on the effects of the application of the same formulation to a modelled nasal mucosa (Calu-3 cell monolayer) have indicated the capability of the formulation to induce the transient opening of tight junctions. Cytotoxic investigations have shown that the formulation exhibits negligible detrimental effects to the integrity of these monolayers. The in vivopotential of the nasal formulation to act as a once-a-day dosage form for the intranasal delivery of insulin has been demonstrated in a diabetic-rat model.
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- 2013
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121. The Agricultural Economy of the Highveld Region.
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VAN DER MERWE, S. W.
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- 1965
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122. SOME ASPECTS OF MODERN DENTIFRICES.
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VAN DER MERWE, S. W.
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DENTIFRICES ,ORAL hygiene ,TOOTH abrasion ,DENTAL literature ,TOOTHPASTE ,DENTAL enamel - Abstract
The article discusses the use of dentifrices in dental care and hygiene and examines dental literature on dentifrices. The effects of advertising and toothpaste taste on dentifrice usage are explored. The abrasion of dental enamel caused by dentifrice usage is examined and a classification of the abrasiveness of various available dentifrices is presented.
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- 1927
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123. Evaluation of a Novel Heminested PCR Assay Based on the Phosphoglucosamine Mutase Gene for Detection of Helicobacter pyloriin Saliva and Dental Plaque
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Goosen, C., Theron, J., Ntsala, M., Maree, F. F., Olckers, A., Botha, S. J., Lastovica, A. J., and van der Merwe, S. W.
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ABSTRACTA novel heminested PCR protocol was developed for the specific detection of Helicobacter pyloriat low copy numbers. A set of primers specific for the phosphoglucosamine mutase gene (glmM) of H. pyloriproduced a 765-bp fragment that was used as template for the heminested primer pair delineating a 496-bp fragment. By using agarose gel electrophoresis for detection of the heminested PCR-amplified products, amplification of H. pylorigenomic DNA was achieved at concentrations as low as 0.1 pg, equivalent to 5 × 102bacteria. A study was subsequently undertaken to evaluate the heminested PCR for detection of H. pyloriin dental plaque and saliva. Specimens collected from 58 individuals were cultured, and PCR was subsequently performed on the oral cultures. Identification of H. pyloriin the same series of saliva and dental plaque specimens was carried out with PCR using a primer pair specific for the H. pyloriurease B gene and by the heminested PCR assay. The identity of the amplified products was confirmed by DNA sequencing. Our results demonstrate that the heminested PCR assay was specific for detection of H. pylori, yielding no false-positive results, and that H. pylorihad a low prevalence (approximately 3%) in specimens obtained from the oral cavity.
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- 2002
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124. DIE HERBEIFÜHRUNG DES VERSICHERUNGSFALLS (Veröffentlichungen des Seminars für Versicherungswissenschaft der Universität Hamburg und des Versicherungswissenschaftlichen Vereins in Hamburg e.V.; Neue Folge Heft 31) ASCAN PINCKERNELLE
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VAN DER MERWE, S. W. J.
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- 1968
125. WOMEN AS MANAGERS-THE CURRENT ATTITUDES AND PROGRAMS OF CANADIAN BUSINESSMEN
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VAN DER MERWE, S.
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Women ,Businesswomen -- Canada ,Business ,Business, general ,Business, international - Published
- 1979
126. A case of primary malignant melanoma of the Œsophagus.
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Fleming, P. C. and van der Merwe, S. B.
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- 1958
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127. Gene symbol: DCYTB/CYBRD1. Disease: primary iron overload
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Mg, Zaahl, At, Merryweather-Clarke, Martha Kotze, van der Merwe S, Warnich L, and Kj, Robson
128. Effect on tuberculosis outcomes of educational outreach to South African clinics during two randomised trials
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Mo, Bachmann, Lr, Fairall, Lombard C, Timmerman V, van der Merwe S, Ed, Bateman, and Merrick Zwarenstein
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Adult ,Male ,Inservice Training ,Public Sector ,Primary Health Care ,Antitubercular Agents ,Middle Aged ,South Africa ,Treatment Outcome ,Retreatment ,Humans ,Tuberculosis ,Female ,Nurse Practitioners ,Clinical Competence ,Randomized Controlled Trials as Topic ,Retrospective Studies - Abstract
Public sector primary care clinics in Free State Province, South Africa.To investigate the effects of on-site in-service clinical skills training for nurse practitioners on tuberculosis (TB) treatment outcomes in the same clinics.Analysis of TB programme data from clinics taking part in two consecutive randomised trials of educational outreach aimed at improving respiratory and human immunodeficiency virus/acquired immune-deficiency syndrome care based on the Practical Approach to Lung Health. We compared treatment outcomes between control and intervention clinics among all patients diagnosed with TB during either trial.During the two trials, participating clinics treated 4187 and 2333 TB patients, respectively. Neither intervention was associated with better outcomes overall. However, among retreatment patients, cure or completion rates in intervention clinics were significantly higher during the second trial (OR 1.78, 95%CI 1.13-2.76). Patients in clinics that had received both interventions had higher cure or completion rates (OR 1.99, 95%CI 1.53-2.58) and lower default rates (OR 0.25, 95%CI 0.097-0.63) than patients in clinics that had received neither intervention.Although not primarily focused on TB treatment, the interventions appeared to improve successful treatment completion rates among TB retreatment cases. Integrated care programmes support attainment of important TB programme goals.
129. Gene symbol: SLC40A1. Disease: Primary iron overload
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Mg, Zaahl, At, Merryweather-Clarke, Martha Kotze, van der Merwe S, Warnich L, and Kj, Robson
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Iron Overload ,Amino Acid Substitution ,Mutation, Missense ,Humans ,Cation Transport Proteins
130. Arginine Gene Clusters in the Proteus-Providence Group
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PROZESKY, O. W., primary, GRABOW, W. O. K., additional, VAN DER MERWE, S., additional, and COETZEE, J. N., additional
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- 1973
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131. Gastric cancers of Western European and African patients show different patterns of genomic instability
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Mulder Chris JJ, Grabsch Heike, Ylstra Bauke, Carvalho Beatriz, Tijssen Marianne, van Grieken Nicole CT, Louw Melanie, Buffart Tineke E, van de Velde Cornelis JH, van der Merwe Schalk W, and Meijer Gerrit A
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Internal medicine ,RC31-1245 ,Genetics ,QH426-470 - Abstract
Abstract Background Infection with H. pylori is important in the etiology of gastric cancer. Gastric cancer is infrequent in Africa, despite high frequencies of H. pylori infection, referred to as the African enigma. Variation in environmental and host factors influencing gastric cancer risk between different populations have been reported but little is known about the biological differences between gastric cancers from different geographic locations. We aim to study genomic instability patterns of gastric cancers obtained from patients from United Kingdom (UK) and South Africa (SA), in an attempt to support the African enigma hypothesis at the biological level. Methods DNA was isolated from 67 gastric adenocarcinomas, 33 UK patients, 9 Caucasian SA patients and 25 native SA patients. Microsatellite instability and chromosomal instability were analyzed by PCR and microarray comparative genomic hybridization, respectively. Data was analyzed by supervised univariate and multivariate analyses as well as unsupervised hierarchical cluster analysis. Results Tumors from Caucasian and native SA patients showed significantly more microsatellite instable tumors (p < 0.05). For the microsatellite stable tumors, geographical origin of the patients correlated with cluster membership, derived from unsupervised hierarchical cluster analysis (p = 0.001). Several chromosomal alterations showed significantly different frequencies in tumors from UK patients and native SA patients, but not between UK and Caucasian SA patients and between native and Caucasian SA patients. Conclusions Gastric cancers from SA and UK patients show differences in genetic instability patterns, indicating possible different biological mechanisms in patients from different geographical origin. This is of future clinical relevance for stratification of gastric cancer therapy.
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- 2011
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132. Recent developments in drinking water standards: worldwide trends
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van der Merwe, S. W., Rillaerts, F., Hydes, O., and Hoffbuhr, J. W.
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- 1998
133. New WHO recommendations for water quality standards. Impact on water treatment practices (International Report)
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Van Der Merwe, S. W.
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- 1996
134. At home in God's world: a transforming paradigm for being human and for social involvement.
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van der Merwe, S. J.
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The article reviews the book "At Home in God's World: A Transforming Paradigm for Being Human and for Social Involvement," by B. J. Van der Walt.
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- 2010
135. Agreement on endoscopic ultrasonography-guided tissue specimens: Comparing a 20-G fine-needle biopsy to a 25-G fine-needle aspiration needle among academic and non-academic pathologists
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Priscilla A. Riet, Djuna L. Cahen, Katharina Biermann, Bettina Hansen, Alberto Larghi, Guido Rindi, Giovanni Fellegara, Paolo Arcidiacono, Claudio Doglioni, Nicola Liberta Decarli, Julio Iglesias‐Garcia, Ihab Abdulkader, Hector Lazare Iglesias, Masayuki Kitano, Takaaki Chikugo, Satoru Yasukawa, Hans Valk, Nam Quoc Nguyen, Andrew Ruszkiewicz, Marc Giovannini, Flora Poizat, Schalk Merwe, Tania Roskams, Erwin Santo, Silvia Marmor, Kenneth Chang, Fritz Lin, James Farrell, Marie Robert, Juan Carlos Bucobo, Alan Heimann, Francisco Baldaque‐Silva, Carlos Fernández Moro, Marco J. Bruno, Fabia Attili, Harry Aslanian, Adebowale Adeniran, John G. Lee, Mariachiara Petrone, Erwan Bories, Erez Scapa, Jonathan M. Buscaglia, Maoxin Wu, van Riet, Pa, Cahen, Dl, Biermann, K, Hansen, B, Larghi, A, Rindi, G, Fellegara, G, Arcidiacono, P. G., Doglioni, C, Liberta Decarli, N, Iglesias-Garcia, J, Abdulkader, I, Lazare Iglesias, H, Kitano, M, Chikugo, T, Yasukawa, S, van der Valk, H, Nguyen, Nq, Ruszkiewicz, A, Giovannini, M, Poizat, F, van der Merwe, S, Roskams, T, Santo, E, Marmor, S, Chang, K, Lin, F, Farrell, J, Robert, M, Bucobo, Jc, Heimann, A, Baldaque-Silva, F, Fernández Moro, C, Bruno, Mj., Gastroenterology & Hepatology, Urology, and Surgery
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medicine.medical_specialty ,MULTICENTER ,Endoscopic ultrasonography ,Endosonography ,Fine needle biopsy ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,GASTROENTEROLOGY EUROPEAN-SOCIETY ,Randomized controlled trial ,PRECISION MEDICINE ,law ,Biopsy ,medicine ,Humans ,DIAGNOSTIC-ACCURACY ,Radiology, Nuclear Medicine and imaging ,Endoscopic Ultrasound-Guided Fine Needle Aspiration ,Pancreas ,ULTRASOUND ,METAANALYSIS ,Science & Technology ,LESIONS ,Gastroenterology & Hepatology ,medicine.diagnostic_test ,business.industry ,Gastroenterology ,Liver, Biliary tract and Pancreas ,Reproducibility of Results ,CORE BIOPSY ,Pancreatic Neoplasms ,Pathologists ,Sample quality ,Fine-needle aspiration ,ROC Curve ,FNA ,030220 oncology & carcinogenesis ,FNB ,22-GAUGE ASPIRATION ,Original Article ,Surgery ,030211 gastroenterology & hepatology ,pathology ,Clinical Competence ,Radiology ,interobserver agreement ,ORIGINAL ARTICLES ,business ,Life Sciences & Biomedicine - Abstract
BACKGROUND AND AIM: A recently carried out randomized controlled trial showed the benefit of a novel 20-G fine-needle biopsy (FNB) over a 25-G fine-needle aspiration (FNA) needle. The current study evaluated the reproducibility of these findings among expert academic and non-academic pathologists. METHODS: This study was a side-study of the ASPRO (ASpiration versus PROcore) study. Five centers retrieved 74 (59%) consecutive FNB and 51 (41%) FNA samples from the ASPRO study according to randomization; 64 (51%) pancreatic and 61 (49%) lymph node specimens. Samples were re-reviewed by five expert academic and five non-academic pathologists and rated in terms of sample quality and diagnosis. Ratings were compared between needles, expert academic and non-academic pathologists, target lesions, and cytology versus histological specimens. RESULTS: Besides a higher diagnostic accuracy, FNB also provided for a better agreement on diagnosing malignancy (ĸ = 0.59 vs ĸ = 0.76, P
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- 2019
136. Gastrointestinal mucosal damage in patients with COVID-19 undergoing endoscopy: an international multicentre study
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Avik Sarkar, Francesco Azzolini, James J. Farrell, Fabio Ciceri, Michiel Bronswijk, Francesco Buttitta, Stefano Angeletti, Per Alberto Testoni, Michel Kahaleh, Emilio Di Giulio, Amy Tyberg, Kofi Oppong, Franco Bazzoli, Emanuele Dilaghi, Serena Porcari, Carolina Tomba, Gabriele Capurso, Guido Costamagna, Salvatore Greco, Cesare Burti, Ioannis S. Papanikolaou, Aurelio Mauro, Fabiana Zingone, P. Fracasso, Julio Iglesias-Garcia, Paolo Giorgio Arcidiacono, Edi Viale, Maria Elena Riccioni, Haroon Shahid, Govind Nair, Edoardo Savarino, Ivo Boškoski, Giuseppe Vanella, Leonardo Henry Eusebi, Philip Roelandt, Jin Woo Gene Yoo, Patrizia Rovere-Querini, Lorella Fanti, Luigi Ricciardiello, Antonio Di Sabatino, Everson L.A. Artifon, Maria Chiara Petrone, Schalk Van der Merwe, R Alexander Speight, Lieven Pouillon, Andre Lino, Daniel De la Iglesia-García, Vanella, G., Capurso, G., Burti, C., Fanti, L., Ricciardiello, L., Souza Lino, A., Boskoski, I., Bronswijk, M., Tyberg, A., Krishna Kumar Nair, G., Angeleti, S., Mauro, A., Zingone, F., Oppong, K. W., De La Iglesia-Garcia, D., Pouillon, L., Papanikolaou, I. S., Fracasso, P., Ciceri, F., Rovere-Querini, P., Tomba, C., Viale, E., Eusebi, L. H., Riccioni, M. E., Van Der Merwe, S., Shahid, H., Sarkar, A., Yoo, J. W. G., Dilaghi, E., Speight, R. A., Azzolini, F., Buttitta, F., Porcari, S., Petrone, M. C., Iglesias-Garcia, J., Savarino, E. V., Di Sabatino, A., Di Giulio, E., Farrell, J. J., Kahaleh, M., Roelandt, P., Costamagna, G., De Almeida Artifon, E. L., Bazzoli, F., Testoni, P. A., Greco, S., Arcidiacono, P. G., Vanella, Giuseppe, Capurso, Gabriele, Burti, Cesare, Fanti, Lorella, Ricciardiello, Luigi, Souza Lino, Andre, Boskoski, Ivo, Bronswijk, Michiel, Tyberg, Amy, Krishna Kumar Nair, Govind, Angeleti, Stefano, Mauro, Aurelio, Zingone, Fabiana, Oppong, Kofi W., de la Iglesia-Garcia, Daniel, Pouillon, Lieven, Papanikolaou, Ioannis S., Fracasso, Pierluigi, Ciceri, Fabio, Rovere-Querini, Patrizia, Tomba, Carolina, Viale, Edi, Eusebi, Leonardo Henry, Riccioni, Maria Elena, van der Merwe, Schalk, Shahid, Haroon, Sarkar, Avik, Yoo, Jin Woo (Gene), Dilaghi, Emanuele, Speight, R. Alexander, Azzolini, Francesco, Buttitta, Francesco, Porcari, Serena, Petrone, Maria Chiara, Iglesias-Garcia, Julio, Savarino, Edoardo V., Di Sabatino, Antonio, Di Giulio, Emilio, Farrell, James J., Kahaleh, Michel, Roelandt, Philip, Costamagna, Guido, de Almeida Artifon, Everson Luiz, Bazzoli, Franco, Testoni, Per Alberto, Greco, Salvatore, and Arcidiacono, Paolo Giorgio
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covid-19 ,endoscopy ,gastrointestinal tract ,mucosal infection ,aged ,COVID-19 ,colitis, ischemic ,cross-sectional studies ,duodenum ,female ,gastric mucosa ,gastrointestinal hemorrhage ,humans ,male ,middle aged ,pandemics ,prospective studies ,risk factors ,SARS-CoV-2 ,stomach ulcer ,endoscopy, gastrointestinal ,Male ,Cross-sectional study ,colitis ,RC799-869 ,Gastroenterology ,Endoscopy, Gastrointestinal ,law.invention ,0302 clinical medicine ,law ,Risk Factors ,030212 general & internal medicine ,Prospective Studies ,Prospective cohort study ,medicine.diagnostic_test ,Diseases of the digestive system. Gastroenterology ,Middle Aged ,Intensive care unit ,Exact test ,medicine.anatomical_structure ,Cohort ,030211 gastroenterology & hepatology ,Female ,Gastrointestinal Hemorrhage ,Colitis, Ischemic ,medicine.medical_specialty ,Duodenum ,Settore MED/12 - GASTROENTEROLOGIA ,ischemic ,COVID-19, Endoscopy, pandemic, ischemic lesions ,03 medical and health sciences ,Internal medicine ,medicine ,Humans ,Stomach Ulcer ,Colitis ,Pandemics ,Aged ,business.industry ,medicine.disease ,gastrointestinal ,Endoscopy ,Cross-Sectional Studies ,Gastric Mucosa ,business - Abstract
BackgroundAlthough evidence suggests frequent gastrointestinal (GI) involvement during coronavirus disease 2019 (COVID-19), endoscopic findings are scarcely reported.AimsWe aimed at registering endoscopic abnormalities and potentially associated risk factors among patients with COVID-19.MethodsAll consecutive patients with COVID-19 undergoing endoscopy in 16 institutions from high-prevalence regions were enrolled. Mann-Whitney U, χ2 or Fisher’s exact test were used to compare patients with major abnormalities to those with negative procedures, and multivariate logistic regression to identify independent predictors.ResultsBetween February and May 2020, during the first pandemic outbreak with severely restricted endoscopy activity, 114 endoscopies on 106 patients with COVID-19 were performed in 16 institutions (men=70.8%, median age=68 (58–74); 33% admitted in intensive care unit; 44.4% reporting GI symptoms). 66.7% endoscopies were urgent, mainly for overt GI bleeding. 52 (45.6%) patients had major abnormalities, whereas 13 bled from previous conditions. The most prevalent upper GI abnormalities were ulcers (25.3%), erosive/ulcerative gastro-duodenopathy (16.1%) and petechial/haemorrhagic gastropathy (9.2%). Among lower GI endoscopies, 33.3% showed an ischaemic-like colitis.Receiver operating curve analysis identified D-dimers >1850 ng/mL as predicting major abnormalities. Only D-dimers >1850 ng/mL (OR=12.12 (1.69–86.87)) and presence of GI symptoms (OR=6.17 (1.13–33.67)) were independently associated with major abnormalities at multivariate analysis.ConclusionIn this highly selected cohort of hospitalised patients with COVID-19 requiring endoscopy, almost half showed acute mucosal injuries and more than one-third of lower GI endoscopies had features of ischaemic colitis. Among the hospitalisation-related and patient-related variables evaluated in this study, D-dimers above 1850 ng/mL was the most useful at predicting major mucosal abnormalities at endoscopy.Trial registration numberClinicalTrial.gov (ID: NCT04318366).
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- 2021
137. EUS-guided gastroenterostomy: Less is more! The wireless EUS-guided gastroenterostomy simplified technique
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Paolo Giorgio Arcidiacono, Michiel Bronswijk, Maria Chiara Petrone, Hannah van Malenstein, Schalk Van der Merwe, Wim Laleman, Giuseppe Vanella, Bronswijk, M., van Malenstein, H., Laleman, W., Van der Merwe, S., Vanella, G., Petrone, M. C., and Arcidiacono, P. G.
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Gastroenterology ,medicine ,Radiology, Nuclear Medicine and imaging ,Radiology ,Gastroenterostomy ,business ,Letter to the Editor ,WEST, wireless EUS-guided gastroenterostomy simplified technique - Abstract
ispartof: VideoGIE vol:5 issue:9 pages:442- ispartof: location:United States status: Published online
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- 2020
138. Helicobacter Pylon in Developing Countries. World Gastroenterology Organisation Global Guideline.
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Hunt, R. H., Xiao, S. D., Megraud, F., Leon-Barua, R., Bazzoli, F., van der Merwe, S., Vaz Coelho, L. G., Fock, M., Fedail, S., Cohen, H., Malfertheiner, P., Vakil, N., Hamid, S., Goh, K. L., Wong, B. C. Y., Krabshuis, J., and Le Mair, A.
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DISEASE prevalence , *HELICOBACTER pylori , *HELICOBACTER pylori infections , *DRUG resistance in microorganisms , *HEALTH & social status , *VACCINATION , *THERAPEUTICS ,DEVELOPING countries - Abstract
The article focuses on the high prevalence of helicobacter pylori (Hp) in developing countries. It states that Hp prevalence was variable due to ethnicity, geography, age, and socioeconomic factors. It mentions that Hp infection could only be treated through therapeutic vaccination. Furthermore, factors in treating such infection were discussed, along with choosing treatment regimens such as its resistance to antibiotics and bismuth availability.
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- 2011
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139. A multicenter randomized trial comparing a 25-gauge EUS fine-needle aspiration device with a 20-gauge EUS fine-needle biopsy device
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Erwan Bories, Andrew Ruszkiewicz, Erez Scapa, Masayuki Kitano, Flora Poizat, Carlos Fernández Moro, Erwin Santo, Takaaki Chikugo, Guido Rindi, Jonathan M. Buscaglia, M C Petrone, Djuna L. Cahen, Marco J. Bruno, Fabia Attili, Harry R. Aslanian, Adebowale J. Adeniran, Priscilla A. van Riet, Maoxin Wu, Francisco Baldaque-Silva, Silvia Marmor, Julio Iglesias-Garcia, Claudio Doglioni, Nam Q. Nguyen, Paolo Giorgio Arcidiacono, Schalk Van der Merwe, Nicole S. Erler, Marie E. Robert, Ihab Abdulkader, Tania Roskams, Juan Carlos Bucobo, Alan Heimann, Katharina Biermann, Marc Giovannini, John G. Lee, Fritz Lin, Alberto Larghi, Jan-Werner Poley, Kenneth J. Chang, James J. Farrell, van Riet, Pa, Larghi, A, Attili, F, Rindi, G, Nguyen, Nq, Ruszkiewicz, A, Kitano, M, Chikugo, T, Aslanian, H, Farrell, J, Robert, M, Adeniran, A, Van Der Merwe, S, Roskams, T, Chang, K, Lin, F, Lee, Jg, Arcidiacono, P. G., Petrone, M, Doglioni, C, Iglesias-Garcia, J, Abdulkader, I, Giovannini, M, Bories, E, Poizat, F, Santo, E, Scapa, E, Marmor, S, Bucobo, Jc, Buscaglia, Jm, Heimann, A, Wu, M, Baldaque-Silva, F, Moro, Cf, Erler, N, Biermann, K, Poley, Jw, Cahen, Dl, Bruno, Mj., Gastroenterology & Hepatology, Epidemiology, and Pathology
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Image-Guided Biopsy ,Male ,medicine.medical_specialty ,Lymphoma ,Gastrointestinal Stromal Tumors ,Lymphadenopathy ,Adenocarcinoma ,Malignancy ,Sensitivity and Specificity ,Endosonography ,Fine needle biopsy ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,law ,Pancreatitis, Chronic ,Intestinal Neoplasms ,Biopsy ,Odds Ratio ,Clinical endpoint ,medicine ,Carcinoma ,Humans ,Radiology, Nuclear Medicine and imaging ,Endoscopic Ultrasound-Guided Fine Needle Aspiration ,Aged ,medicine.diagnostic_test ,business.industry ,Gastroenterology ,Middle Aged ,medicine.disease ,Pancreatic Neoplasms ,Clinical trial ,Neuroendocrine Tumors ,Fine-needle aspiration ,Needles ,Lymphatic Metastasis ,030220 oncology & carcinogenesis ,Multivariate Analysis ,Carcinoma, Squamous Cell ,Female ,030211 gastroenterology & hepatology ,Biopsy, Large-Core Needle ,Radiology ,business - Abstract
Several studies have compared EUS-guided FNA with fine-needle biopsy (FNB), but none have proven superiority. We performed a multicenter randomized controlled trial to compare the performance of a commonly used 25-gauge FNA needle with a newly designed 20-gauge FNB needle.Consecutive patients with a solid lesion were randomized in this international multicenter study between a 25-gauge FNA (EchoTip Ultra) or a 20-gauge FNB needle (ProCore). The primary endpoint was diagnostic accuracy for malignancy and the Bethesda classification (non-diagnostic, benign, atypical, malignant). Technical success, safety, and sample quality were also assessed. Multivariable and supplementary analyses were performed to adjust for confounders.A total of 608 patients were allocated to FNA (n = 306) or FNB (n = 302); 312 pancreatic lesions (51%), 147 lymph nodes (24%), and 149 other lesions (25%). Technical success rate was 100% for the 25-gauge FNA and 99% for the 20-gauge FNB needle (P = .043), with no differences in adverse events. The 20-gauge FNB needle outperformed 25-gauge FNA in terms of histologic yield (77% vs 44%, P .001), accuracy for malignancy (87% vs 78%, P = .002) and Bethesda classification (82% vs 72%, P = .002). This was robust when corrected for indication, lesion size, number of passes, and presence of an on-site pathologist (odds ratio, 3.53; 95% confidence interval, 1.55-8.56; P = .004), and did not differ among centers (P = .836).The 20-gauge FNB needle outperformed the 25-gauge FNA needle in terms of histologic yield and diagnostic accuracy. This benefit was irrespective of the indication and was consistent among participating centers, supporting the general applicability of our findings. (Clinical trial registration number: NCT02167074.).
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- 2019
140. The calling of the Reformed Church in Mozambique towards gender equality in church and society
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Nobre, M. J. C., Van der Merwe, S.J., 10257543 - Van der Merwe, Sarel Jacobus (Supervisor), and Van der Merwe, S. J., Prof
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missiology ,society ,Reformed Church in Mozambique ,church ,missio Dei ,gender equality - Abstract
PhD (Missiology), North-West University, Potchefstroom Campus This study has emerged from the observation that there is not a single ordained female minister in the Reformed Church in Mozambique, which is in contrast with the fact that the female gender has attained significant success with regard to their position worldwide. In comparison to the times when women had no rights at all in the family circle or in the church and society at large, the above-mentioned success of women has been a struggle, fought not only by women, but by men as well (Chiziane, 2014:22). Though the female gender has made significant strides, the researcher strongly believes that at the present stage much has still to be investigated regarding the field of gender equality, either in church or society at large. The assumption is that the Reformed Church in Mozambique can partake in the missio Dei by transforming the church and society towards gender equality. The study firstly considers the revelational biblical and missiological narrative in order to gain knowledge on gender relationships therein. Secondly, the study is confined to the context of Mozambican society to determine gender relationships, given that some of the challenges that women (girls) face start or occur within the immediate family circle, which is the nucleus of the society. Then the history of the Reformed Church in Mozambique, which is now officially 107 years old (Gouws, 2005:19), is taken into consideration to establish a background to gender issues in this church. In ecclesiastical circles, where gender discrimination would not be expected to occur, women are still being sidelined to this day. As observed by Magagula (2014), there are no women serving in the pastoral offices of the church and since 1994, when the Reformed Church in Mozambique founded HEFSIBA, the church’s pastors training college, not a single woman has been trained so far. The ultimate purpose of this study is to assess how the Reformed Church in Mozambique can participate in the missio Dei by promoting gender equality in the church and society as well to develop a preliminary paradigm in order to help the church in this task. Doctoral
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- 2019
141. A conceptual framework for sustainable community development
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Niesing, Christina Maria, Van der Merwe, S.P., 10065458 - Van der Merwe, Stephanus Petrus (Supervisor), and Van der Merwe, S P
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Conceptual framework ,Income-generating community projects ,Sustainable community development ,Poverty ,Bottom-up approach - Abstract
PhD (Business Administration), North-West University, Potchefstroom Campus, 2017 One of the main challenges facing South African citizens in terms of sustainable community development, remains the fight against poverty. One of the strategies implemented by the South African government to eradicate poverty, is the implementation of income-generating community projects. The advantages of the development of such interventions include the development of skills in conjunction with financial benefits stimulated by economic activities in communities. The expectation exists that income-generating community projects should develop into sustainable businesses after the initial skill development and donor funding. Unfortunately, this expectation is unrealistic, because income-generating community projects fail to develop into sustainable businesses and have a limited life span. However, they do facilitate sustainable community development in terms of skills development, development of entrepreneurs and economic development. The main objective of this study was to construct a conceptual framework to guide the planning and implementation of income-generating community projects to facilitate sustainable community development through the use of income-generating community projects. The case study of the Holding Hands income-generating community project provided an opportunity to study the development, implementation and functioning of an income-generating community project to develop a framework for the development and implementation of future income-generating community projects. The methodology consisted of a qualitative approach to explore a case study in order to develop constructivist grounded theory. A document analysis of the available documents on the planning, development and implementation of the Holding Hands income-generating community project was used as the first phase of data analysis with the assistance of ATLAS.ti. This resulted in the development of 10 themes and 33 codes. The gaps identified in the data were filled with in-depth interviews conducted with the participants of the Holding Hands income-generating community project. The in-depth interviews confirmed that a SWOT analysis can be a useful tool to assist community mapping and that a social network analysis of the participants can provide required networks to enhance the impact of interventions on sustainable community development. The literature review provided additional information to support the identified codes and themes. The findings of the data analysis and the literature review were integrated to develop a conceptual framework based on four core principles consisting of five phases, ten steps and thirty-three actions to guide the planning, implementation and measurement and evaluation of income-generating community projects to facilitate sustainable community development. The limitation of the study was mainly rooted in the fact that it consisted of a single case study within a specific context. This provides an opportunity to test the conceptual framework in future research Doctoral
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- 2016
142. An investigation of entrepreneurial driving forces and motivators
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Coetzee, Cornelius Johannes, Van der Merwe, S.P., 10065458 - Van der Merwe, Stephanus Petrus (Supervisor), and Van der Merwe, S P
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Entrepreneurial skills ,Entrepreneurial drivers ,Entrepreneurial characteristics ,Entrepreneurship ,Entrepreneurial motivators ,Entrepreneurial risk ,Entrepreneurial success - Abstract
MBA, North-West University, Potchefstroom Campus, 2017 This study takes a look at entrepreneurial drivers and motivators for entrepreneurship and if the changing climate of business and the economy allows for new drivers and motivators to come forward. The study will determine if the current driving forces and motivators for entrepreneurship through the change economy and environment will change and if so try, and establish the degree of change. The literature review looks at the theoretical information regarding entrepreneurship, who the entrepreneur is, defining entrepreneurship together with the skills required for entrepreneurship, the characteristics of an entrepreneur, entrepreneurial drivers and motivators and the entrepreneurial risk associated with entrepreneurship. This qualitative study then interviewed a total number of 8 entrepreneurs which is situated in Gauteng South Africa whose business is three years and older to see if their drivers and motivators had changed, remained the same and what role technology had played in their respective businesses. The empirical evidence showed that the drivers and motivators for entrepreneurship had stayed the same. The core of the business has stayed the same, but the role of technology as an influencer in how business was conducted was vast and undeniable. Technology is used to speed things up in businesses and assists in making the business decision making and environment easier. Technology is seen as an internal influencer on the business. This study finds that entrepreneurs require a lot of skills which can be learned and taught when required by the entrepreneurs to move their businesses forward. Entrepreneurial characteristics are what the entrepreneur has, something that can be enhanced but not taught, the entrepreneur has character and certain characteristics. Entrepreneurs also define success in their ability to help other people live a better live rather than chasing wealth. According to the entrepreneurs, their view of risk is different than for someone working at a typical job. According to the entrepreneurs the typical definition of a stable job is actually more risky due to the economic climate of uncertainty and retrenchments Masters
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- 2016
143. An assessment of the impact of entrepreneurial orientation on the success of selected public secondary schools
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Malan, Jan Harm, Van der Merwe, S.P., 10065458 - Van der Merwe, Stephanus Petrus (Supervisor), and Van der Merwe, S P
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Principal ,School management ,Secondary schools ,Intrapreneur ,Success ,Entrepreneurial leadership ,Entrepreneurial orientation - Abstract
PhD (Business Administration), North-West University, Potchefstroom Campus, 2017 Entrepreneurship has been hailed as the new engine of economic growth in both developed and developing countries. It is paradigmatically referred to as the process of innovatively exploring and exploiting opportunities in the midst of risks and uncertainty, by synthesising resources to create novel outputs, often within the context of new organisational formation. Exalted as the driving force of innovation, entrepreneurship offers the benefits of increased economic efficiencies, alleviation of poverty, bringing, innovation to the market, job creation, and sustained employment. Traditionally, entrepreneurship was associated with the private sector and for-profit businesses, with entrepreneurial innovations considered to be those directed toward the marketplace. Therefore, the phenomenon initially received marginal attention in public school management. Schools are state-appointed suppliers of a service, funded by the government, and are considered as domesticated organisations, therefore their survival is seldom at doubt. On the other hand, schools are operating in an environment of increasing uncertainty. This uncertainty stems from their openness and consequent exposure to rapid environmental changes. It was found that public schools face various challenges, including a lack of entrepreneurial spirit and a fragmented approach regarding their visions, missions and strategic thrust. This study, through literature research and a quantitative empirical research, focused on the identification of the dimensions of entrepreneurial orientation (independent variables) and the factors related to perceived school success (dependent variables). Furthermore, the study exploits the relationship between the dependent variables and the independent variables to determine the impact of entrepreneurial orientation on perceived school success in three predetermined groups of secondary schools in Gauteng. Factors measuring entrepreneurial orientation were extracted from the literature review, and identified as autonomy, innovativeness, risk-taking, competitive aggressiveness and pro-activeness. Factors measuring perceived school success were identified in order to develop a measure of school success. The 13 identified dependent variables were classified into four different groups. After grouping, the four main categories were school leadership (leadership, evaluating school performance and staff development), teaching and learning (emphasis on academics, class size and high quality of teaching and learning), learner behaviour (safe and orderly schools, discipline and parental involvement) and learners (learner self-esteem, monitoring pupil performance, feedback and high expectations). The study was based on a sample of 800 educators, heads of departments, deputy principals and principals at selected public secondary schools in the province of Gauteng in South Africa, who completed a structured questionnaire. The majority of the respondents were between the ages of 50 and 59 and 74% of the respondents were female. The primary unit of measurement was public secondary schools, and as expected, respondents were mostly educated, with 97.6% in possession of post-matric qualifications. Only 74.1% had a degree or higher qualification though. A total of 79.3% of the respondents were educators on post level 1 and regarding the population group, 83.5% were White. The effect of each of the independent variables on each of the measures of perceived school success, as the dependent variable, was measured through 13 multiple regression coefficients, after the independent variable was proven reliable and valid through drawing a pattern matrix of Oblimin rotated-principal component factor analysis, Kaiser-Meyer-Olkin measures of sampling adequacy, and Bartlett‘s test of sphericity. The measurement instrument utilised in this study was proven to be reliable and valid. None of the factors loaded significantly onto the independent variable, risk-taking. A Hierarchical Linear Modeling was performed to determine whether there were significant differences between the school groups in terms of selected variables. A Spearman rho was also performed to determine the correlation between the independent variables and the four main groups of dependent variables. During the empirical research, it was found that significant relationships exist between leadership, autonomy, innovativeness, and competitive aggressiveness; evaluating school performance, autonomy, and innovativeness; staff development, autonomy, innovativeness, and competitive aggressiveness; emphasis on academics, autonomy, innovativeness, and competitive aggressiveness; class size, pro-activeness and competitive aggressiveness; quality of teaching and learning, autonomy and innovativeness; safe schools, autonomy, innovativeness and competitive aggressiveness; discipline, autonomy, innovativeness and pro-activeness; parental involvement, pro-activeness and competitive aggressiveness; learner self-esteem, innovativeness and pro-activeness; monitoring pupil performance, autonomy and innovativeness; feedback, autonomy, innovativeness; and high expectations, autonomy and innovativeness. In relation to the Hierarchical Linear Modeling of the independent variables, differences between the three groups of schools were found in terms of innovativeness (practical visible and practical significant differences), pro-activeness (practical visible difference), and competitive aggressiveness (practical visible difference). The results of the dependent variables indicate practical significant differences in terms of emphasis on academics and parental involvement. The results of the Spearman rho indicated that the four groups of dependent variables were reliable after determining the Cronbach alpha coefficients. Practical significant correlations were found between innovativeness, school leadership, teaching and learning and learner behaviour; competitive aggressiveness, school leadership, teachingand learning and learner behaviour. Practical visible correlations were found between autonomy, school leadership, teaching and learning, learner behaviour and learners; Innovativeness and learners; pro-activeness, school leadership, teaching and learning and learner behaviour; and competitive aggressiveness and learners. Both primary and secondary objectives were met and all research questions were answered. All criteria were met to ensure that the research was conducted according to research principles. Through this research, school principals and school management teams in South Africa can gain insight into the creation of entrepreneurial success as well as the measurements of perceived school success, in order to create sustainability and a competitive advantage. It is recommended that future research should include non-functional or poor performing schools Doctoral
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- 2016
144. World Gastroenterology Organisation Global Guideline
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H. Cohen, Nimish Vakil, Khean-Lee Goh, S. Hamid, Franco Bazzoli, S. D. Xiao, A. Le Mair, M. Fock, Francis Mégraud, Justus Krabshuis, Benjamin C.Y. Wong, S. W. van der Merwe, L. G. Vaz Coelho, S. Fedail, Richard H. Hunt, Raúl León-Barúa, Peter Malfertheiner, Hunt, R.H, Xiao, S.D., Megraud, F., Leon-Barua, R., Bazzoli, F., Van Der Merwe, S., Vaz Coelho, L.G., Fock, M., Fedail, S., Cohen, H., Malfertheiner, P., Vakil, N., Hamid, S., Goh, K.L., Wong, B.C.Y., Krabshuis, J., and Le Mair, A.
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Peptic ,Population ,Developing country ,Disease ,Gastroenterology ,Helicobacter Infections ,Developing Countrie ,Young Adult ,Risk Factors ,Internal medicine ,Prevalence ,medicine ,Global health ,Humans ,Child ,education ,Developing Countries ,Aged ,Aged, 80 and over ,education.field_of_study ,Helicobacter pylori ,biology ,business.industry ,Risk Factor ,Incidence (epidemiology) ,Infant ,Middle Aged ,biology.organism_classification ,digestive system diseases ,Child, Preschool ,Female ,business ,Helicobacter Infection ,Developed country ,Human - Abstract
Helicobacter pylori (Hp) is found in half the population of the world. Its prevalence is highly variable in relation to geography, ethnicity, age, and socioeconomic factors high in developing countries and lower in the developed world. In general, however, there has been a decreasing trend in the prevalence of Hp in many parts of the world in recent years. Direct epidemiologic comparisons of peptic ulcer disease (PUD) between developing and developed countries are complex, as peptic ulcers may be asymptomatic and the availability and accessibility of the tests required for diagnosis vary widely. In developing countries, Hp infection is a public-health issue. The high prevalence of the infection means that public-health interventions may be required. Therapeutic vaccination is probably the only strategy that would make a decisive difference in the prevalence and incidence of Hp throughout the world. The short-term approach, however provided that resources allow for this would be a test-andtreat strategy for those who are at risk for peptic ulcer disease or gastric cancer, as well as for those with troublesome dyspepsia. EDuCATION IN GASTROENTEROLOGy
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- 2011
145. Persistent Microbial Translocation and Immune Activation in HIV‐1–Infected South Africans Receiving Combination Antiretroviral Therapy
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Susan Malfeld, Theresa M. Rossouw, Schalk W. van der Merwe, Sharon Cassol, Massimo Alfano, Guido Poli, Christopher J. Seebregts, Phetole Walter Mahasha, Edana Cassol, Cassol, E, Malfeld, S, Mahasha, P, van der Merwe, S, Cassol, S, Seebregts, C, Alfano, M, Poli, Guido, and Rossouw, T.
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Chemokine ,biology ,medicine.medical_treatment ,T cell ,Monocyte ,virus diseases ,Inflammation ,Virology ,Infectious Diseases ,Cytokine ,medicine.anatomical_structure ,Immunopathology ,Immunology ,medicine ,biology.protein ,Immunology and Allergy ,Tumor necrosis factor alpha ,medicine.symptom ,Viral load - Abstract
Background. Microbial translocation contributes to immune activation and disease progression during chronic human immunodeficiency virus type 1 (HIV-1) infection. However, its role in the African AIDS epidemic remains controversial. Here, we investigated the relationship between markers of monocyte activation, plasma lipopolysaccharide (LPS), and HIV-1 RNA in South Africans prioritized to receive combination antiretroviral therapy (cART). Methods. Ten HIV-1–negative African controls and 80 HIV-1–infected patients with CD4 T cell counts !200 cells/mL were sampled prior to ( ) or during ( ) receipt of effective cART. Viral load was measured n p 60 n p 20 by Nuclisens; LPS by the Limulus amoebocyte lysate assay; monocyte and T cell subsets by flow cytometry; and soluble CD14, cytokines, and chemokines by enzyme-linked immunosorbent assay and customized Bio-Plex plates. Results. Three distinct sets of markers were identified. CCL2, CXCL10, and CD14 + CD16 + monocyte levels were positively correlated with HIV-1 viremia. This finding, together with cART-induced normalization of these markers, suggests that their upregulation was driven by HIV-1. Plasma interleukin-6 was associated with the presence of opportunistic coinfections. Soluble CD14 and tumor necrosis factor were linked to plasma LPS levels and, as observed for LPS, remained elevated in patients receiving effective cART. Conclusions. Microbial translocation is a major force driving chronic inflammation in HIV-infected Africans receiving cART. Prevention of monocyte activation may be especially effective at enhancing therapeutic outcomes.
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- 2010
146. The neglected hepatitis C virus genotypes 4, 5 and 6: an international consensus report
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Geoffrey Dusheiko, Nizar N. Zein, Adrián Gadano, Jean-Michel Pawlotsky, Rami Moucari, Samir Haffar, E. Jenny Heathcote, Patrick Marcellin, Nabil Antaki, Antonio Craxì, Schalk Van der Merwe, Sanaa M. Kamal, Ching-Lung Lai, Antaki, N, Craxi, A, Kamal, S, Moucari, R, Van der Merwe, S, Haffar, S, Gadano, A, Zein, N, Lai, CL, Pawlotsky, JM, Heathcote, EJ, Dusheiko, G, and Marcellin, P
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medicine.medical_specialty ,Genotype ,Hepatitis C virus ,Hepacivirus ,medicine.disease_cause ,chemistry.chemical_compound ,Pharmacotherapy ,Pegylated interferon ,Internal medicine ,Epidemiology ,Prevalence ,medicine ,Humans ,Hepatology ,business.industry ,Transmission (medicine) ,Ribavirin ,virus diseases ,Hepatitis C ,medicine.disease ,Virology ,digestive system diseases ,chemistry ,HCV ,business ,Viral hepatitis ,medicine.drug - Abstract
Hepatitis C virus (HCV) genotypes 4, 5 and 6 represent20% of all HCV cases worldwide. HCV-4 is mainly seen in Egypt, where it represents 90% of all HCV cases. Antischistosomal therapy was the main cause of contamination there, followed by procedures performed by informal providers and traditional healers such as dental care, wound treatment, circumcision, deliveries, excision and scarification. It is also highly prevalent in sub-Saharan Africa and in the Middle East. In Europe, its prevalence has recently increased particularly among intravenous drug users and in immigrants. HCV-5 is mainly found in South Africa, where it represents 40% of all HCV genotypes, but four pockets of HCV-5 were found in France, Spain, Syria and Belgium and sporadic cases were found elsewhere. The mode of transmission is mainly iatrogenic and transfusion. HCV-6 is found in Hong Kong, Vietnam, Thailand and Myanmar and also in American and Australian from Asian origin. The response to treatment in HCV-4 is intermediate between HCV-1 and HCV-2 and HCV-3. A sustained viral response is achieved in 43-70% with pegylated interferon and ribavirin. It is higher in Egyptians than Europeans and Africans and is negatively related to insulin resistance and to the severity of fibrosis. It increases to80% with 24 weeks of therapy only if a rapid virological response is achieved. In HCV-5, a sustained virological response is achieved in60% with 48 weeks of therapy. HCV-6 is also considered an easy-to-treat genotype, leading to a response in 60-85% of cases.
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- 2010
147. An investigation of the success factors of black commercial farmers in the North West Province
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Peach, Yolande, Van der Merwe, S.P., 10065458 - Van der Merwe, Stephanus Petrus (Supervisor), and Van der Merwe, S P
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Perceived success ,Land reform ,Black farmer ,Commercial farmer ,Success factor - Abstract
MBA, North-West University, Potchefstroom Campus, 2016 South Africa’s agriculture sector is characterised by two very different constituents: a small number of very modern mechanised commercial farmers and a much larger number of small-scale farmers. This dualism was a product of the Apartheid legacy that began with the controversial Natives Land Act (No 27) of 1913 followed by almost 70 years of Government policies and subsidies to advance white commercial agriculture on 84% of the land area. In contrast, black farmers were forced off their land and prohibited to farm on a large scale. The land issue in South Africa is sensitive and emotional and to add to this emotion in the current day, the land reform process in South Africa is slow to correct the unequal land distribution of the past. To ensure black commercial farmers are successful the government and the private sector should provide adequate support to improve their success rate and ultimately protect food security in South Africa. To understand what will constitute adequate support for these farmers, the role players in the industry should first understand what factors impacts on their success. The primary objective of this study is firstly to investigate the factors that influence the success of black commercial farmers in the North West Province and secondly to provide recommendations to industry role players and policy makers to ensure that their support structures will be suitable to increase the success of these farmers. In order to achieve the objective a semi-structured interview questionnaire was performed with 14 successful black commercial farmers in the North West Province. Conclusions were drawn from this study on the outcomes of the factors influencing the perceived success of black commercial farmers in the North West Province. Finally, a critical evaluation was done and practical recommendations are suggested to improve the success rate of black commercial farmers in South Africa. Masters
- Published
- 2015
148. Assessing women entrepreneurship in the information communication technology industry
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Khojane, Prudence Mashamatla, Van der Merwe, S P, Van der Merwe, S.P., and 10065458 - Van der Merwe, Stephanus Petrus (Supervisor)
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Women entrepreneurship ,Information Communication and Technology (ICT) ,Small and Medium-sized Enterprise (SME) - Abstract
MBA, North-West University, Potchefstroom Campus, 2015 Entrepreneurship has a significant role in the economy of South Africa, hence it is important to embrace entrepreneurship especially women entrepreneurs because there is a lot of stereotyping around women entrepreneurs. However, woman inherited historical imbalances because of the history of South Africa, and this create women entrepreneurs to be faced with unique challenges and barriers as compare to men entrepreneurs. The Information Technology and Communication (ICT) industry is a male dominated industry, meaning a lot of businesses are owned by man as compared to women. This industry requires a lot of technical background which is normally acquired by men. Therefore, a lot of women entrepreneurs face a lot of challenges and barriers in this industry. This research investigated the unique challenges and barriers faced by women entrepreneurs in the ICT industry. The literature study provided information on entrepreneurship and the process of entrepreneurship on how to identify opportunities. The literature also included background information on women entrepreneurs and what motivates them to be self-employed. The characteristics of a woman entrepreneur were explored, and the unique challenges or barriers a woman entrepreneur faces. The empirical study was researched by a questionnaire developed by North-West University, specifically the Potchefstroom Business School (PBS). A total of 70 printed copies of the questionnaires were distributed and two were sent via email to the women entrepreneurs. The data from the questionnaires was converted into useful outputs such as percentage graphs and frequency tables. The percentage graphs and frequency tables were used to make recommendations and conclusions regarding the assessment of women entrepreneurs in the ICT industry. Women entrepreneurs that participated in the research indicated the need for marketing support as well as the growth support. Government and all other relevant stakeholders should promote public awareness and ensure that resources for programs to foster entrepreneurship are decentralised; this will also have to include awareness on ICT industry. Masters
- Published
- 2015
149. The implications of Missio Dei for transforming the ideal of well-being of the Sangha Baka Pygmies (Republic of Congo)
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Van Rooyen, Jacobus Louis Stephanus, Van der Merwe, S., Knoetze, H., and 10257543 - Van der Merwe, Sarel Jacobus (Supervisor)
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lnculturation ,Missio Dei ,Wellbeing ,African ,Contextualisation ,Worldview ,Baka ,Pygmy ,Obedience ,Poor ,Dualism ,Brueggemann ,Syncretism ,Biblical wellbeing ,Relativism ,Prayer - Abstract
MA (Missiology), North-West University, Mafikeng Campus, 2014 It is a common myth that "natural man" seeks God or lives in harmony with the Creator. Contrasting the "praetercolonial"1 Baka Pygmies'2 conception of wellbeing with the true ideal of wellbeing, depicted in the New Testament (specifically in John 6 and Philippians 4), it becomes evident that they lack an important aspect, shared with the rest of humanity: total reliance on the Creator. The New Testament ideal of wellbeing is closely related to a reliance on the mercy of God, born from the realisation of inadequacy and the need for redemption. The Gospel speaks of a God that not only offers that redemption, but in effect became redemption. This contradicts a common African belief that God abandoned His creation and that humanity is now at the mercy of the spiritual powers confined to a naturalistic world. Applying Brueggemann's three-storied worldview shows that God is actively involved in humanity, thereby contradicting the false notion of a distant Creator. The Baka do not consider themselves sinful and share the rest of humanity's unwillingness to surrender their independence to the mercy of God (Luke 18:9-14). They are consequently vulnerable to manipulation by spirits and powers in their search to interact with "superhuman" forces, in an effort to achieve an idealised state of wellbeing. Missiologically speaking, by transforming this subjective, anthropocentric ideal of wellbeing, the praetor colonial Baka is led to a new ideal based upon the surrender of self- reliance that leads to comprehensive salvation in Jesus Christ, avoiding vestiges of syncretism, relativism and dualism in new converts. Masters
- Published
- 2014
150. Guideline for the diagnosis and treatment of chronic pancreatitis.
- Author
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Bornman, P. C., Botha, J. F., Ramos, J. M., Smith, M. D., van der Merwe, S., Watermeyer, G. A., and Ziady, C. C. M.
- Subjects
- *
MEDICAL care standards , *PANCREATITIS treatment , *GASTROENTEROLOGY , *ENDOSCOPIC gastrointestinal surgery , *DISEASE management , *SOCIETIES - Abstract
The article offers information on the guidelines to follow in the diagnosis and treatment of chronic pancreatitis (CP). It states that the Hepato-Pancreatic-Biliary Association (HPBASA) and the South African Gastroenterology Society (SAGES) guidelines provide assistance on the standard of care for the management of the disease. It cites that the guidelines give recommendations to help in the diagnosis, medical management as well as endoscopic and surgical interventions for CP treatment.
- Published
- 2012
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