Search Results - "Johnson, Quinton"
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Consumption of Sutherlandia frutescens by HIV-Seropositive South African Adults: An Adaptive Double-Blind Randomized Placebo Controlled Trial
Published in PloS one (17-07-2015)“…Sutherlandia frutescens (L.) R. Br. is widely used as an over the counter complementary medicine and in traditional medications by HIV seropositive adults…”
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Ethnobotanical survey of medicinal plants used to manage High Blood Pressure and Type 2 Diabetes Mellitus in Bitterfontein, Western Cape Province, South Africa
Published in Journal of ethnopharmacology (24-12-2016)“…The aim of this study was to identify and document medicinal plants used to manage High Blood Pressure and Type 2 Diabetes Mellitus in Bitterfontein, Western…”
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Analysis of the interdependent relationship between porosity, deformation, and crack growth during compression loading of LPBF AlSi10Mg
Published in Materials science & engineering. A, Structural materials : properties, microstructure and processing (05-09-2022)“…For parts loaded in tension and shear, it is clear that voids created during manufacturing generally decrease part strength and ductility. This study examines…”
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Mapping 3D grain and precipitate structure during in situ mechanical testing of open-cell metal foam using micro-computed tomography and high-energy X-ray diffraction microscopy
Published in Materials characterization (16-11-2022)“…Open-cell metal foams are ultra-low-density cellular metals with complex hierarchical structures that span bulk, cell, ligament, and sub-ligament scales and…”
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Mapping 3D grain and precipitate structure during in situ mechanical testing of open-cell metal foam using micro-computed tomography and high-energy X-ray diffraction microscopy
Published in Materials characterization (01-01-2023)“…•3D grain structure is mapped and tracked during loading of open-cell metal foam.•Challenges included sample size relative to beam size and large ligament…”
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Immunomodulating polysaccharides from Lessertia frutescens leaves: Isolation, characterization and structure activity relationship
Published in Journal of ethnopharmacology (14-03-2014)“…Sutherlandia frutescens (syn. Lessertia frutescens) is an indigenous plant in Southern Africa and has been extensively studied from the ethnobotanical point of…”
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Three-Dimensional In-Situ Characterization of Microscale Features During Compression Loading of Open-Cell Aluminum Foam and Laser Powder Bed Fusion AlSi10Mg
Published 01-01-2020“…Failure in ductile metals is heavily influenced by microstructural features (e.g., grain structure, porous defects, and second phase precipitates)…”
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Dissertation -
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Quantitative determination of flavonoids and cycloartanol glycosides from aerial parts of Sutherlandia frutescens (L.) R. BR. by using LC-UV/ELSD methods and confirmation by using LC–MS method
Published in Journal of pharmaceutical and biomedical analysis (05-06-2010)“…This paper describes the first analytical method for the determination of four flavonoids (sutherlandins A–D) and four cycloartanol glycosides…”
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Cycloartane Glycosides from Sutherlandia frutescens
Published in Journal of natural products (Washington, D.C.) (01-10-2008)“…Four new cycloartane glycosides, sutherlandiosides A−D (1−4), were isolated from the South African folk medicine Sutherlandia frutescens and their structures…”
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Efficacy of Artemisia afra phytotherapy in experimental tuberculosis
Published in Tuberculosis (Edinburgh, Scotland) (01-12-2009)“…Summary Artemisia afra [Jacq] (Asteraceae) phytotherapy is widely used for its medicinal properties in traditional practices. In this study we investigated…”
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Flavonol glycosides from the south African medicinal plant Sutherlandia frutescens
Published in Planta medica (01-01-2010)“…Phytochemical investigation of the leaves of Sutherlandia frutescens led to the isolation of four new 3-hydroxy-3-methylglutaroyl-containing flavonol…”
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Consumption of Sutherlandia frutescens by HIV-Seropositive South African Adults: An Adaptive Double-Blind Randomized Placebo Controlled Trial: e0128522
Published in PloS one (01-07-2015)“…Background Sutherlandia frutescens (L.) R. Br. is widely used as an over the counter complementary medicine and in traditional medications by HIV seropositive…”
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Journal Article -
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Erratum to “Quantitative determination of flavonoids and cycloartanol glycosides from aerial parts of Sutherlandia frutescens (L.) R. BR. by using LC-UV/ELSD methods andconfirmation by using LC–MS method” [Journal of Pharmaceutical and Biomedical Analysis. Volume (52) 173-180]
Published in Journal of pharmaceutical and biomedical analysis (01-09-2010)Get full text
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Polysaccharides from the South African medicinal plant Artemisia afra: Structure and activity studies
Published in Fitoterapia (01-01-2018)“…Artemisia afra (Jacq. Ex. Willd), is an indigenous plant in South Africa and other parts of the African continent, where it is used as traditional medicine…”
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A randomized, double-blind, placebo-controlled trial of Lessertia frutescens in healthy adults
Published in PLoS clinical trials (27-04-2007)“…Indigenous medicines are widely used throughout Africa, despite a lack of scientific evidence for their safety or efficacy. The aims of this study were: (a) to…”
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Capacity for clinical research on herbal medicines in Africa
Published in The journal of alternative and complementary medicine (New York, N.Y.) (01-06-2012)“…An electronic survey was used to assess the training needs of clinical and public health researchers who have been involved, and/or plan to become involved, in…”
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Tulbaghia alliacea phytotherapy: a potential anti‐infective remedy for candidiasis
Published in Phytotherapy research (01-10-2006)“…The reproductive health of individuals is severely compromised by HIV infection, with candidiasis being the most prevalent oral complication in patients…”
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Journal Article