Prof.
Edward Mitchell
(ESRF)
17/11/2015, 18:00
Main
Poster Presentations
The creation and tailoring of new materials are at the heart of current industry challenges. New materials must meet ever more stringent requirements of performance, whilst fitting into the modern cradle-to-grave cycle of material production, use, and recycling. The properties and function expected of materials depend heavily upon their composition and their micro- or even nano-structure....
Ms
Jennifer Channell
(ESRF/ILL/Keele University)
17/11/2015, 18:02
Main
Poster Presentations
Cluster of differentiation 4 (CD4) plays an important role in the adaptive immune response. CD4 is also the primary receptor for the HIV-1 envelope glycoprotein 120 (gp120). CD4 contains a metastable disulphide bond in its second domain which enables this protein's redox activity. CD4 binds the gp120 component of the viral envelope protein in a partially reduced state as shown by biochemical...
Dr
Schadrack Nsengiyumva
(Rhodes University)
17/11/2015, 18:04
Main
Poster Presentations
Stress migration of point and open-volume defects in materials is an important problem in a wide variety of applications, including radiation damage and ion beam modification of materials. This study aims to contribute to a better understanding of the basic processes underlying the effects of stress-assisted diffusion and ion-beam induced stress relaxation in metals. The stress profile in...
Dr
Diouma KOBOR
(University Assane Seck of Ziguinchor)
17/11/2015, 18:06
Main
Poster Presentations
The performance of transducers can be significantly increased by the use of active materials with large piezoelectric coefficients (dij) and large coupling factors (kij) [1]. Recently, high levels of piezoelectricity have been published in Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) and Pb(Zn1/3Nb2/3)O3-PbTiO3...
Dr
Hafida Boutefnouchet
(LMGM, University of Annaba)
17/11/2015, 18:08
Main
Poster Presentations
Combustion synthesis commonly called SHS (for self-propagating high-temperature synthesis) is a promising method employed for the synthesis of many advanced materials, such as ceramics, composites, intermetallics, etc. This method is based on the use of the heat released during exothermic reactions in order to preheat raw materials and to obtain a self-sustained system.
The main advantages of...
Mr
Vinesh JUGNARAIN
(ESRF/ILL/SYNTHELIS/WITS/UJF)
17/11/2015, 18:10
Main
Poster Presentations
Membrane proteins constitute up to 30% of the genome and have extremely important roles in many biological processes such as signal transduction, or the substrate transport energy production. Economically, existing drugs targeting GPCRs generate annually nearly $ 25 billion in the world economy. It is therefore essential to have a thorough understanding of their structures and their dynamics...
Prof.
Simon Connell
(University of Johannesburg)
17/11/2015, 18:12
Main
Poster Presentations
Synthetic diamond of exceptional quality is required for many high technology applications. An example from high performance electronics is the so-called δ-doped diamond envisaged as an electrical switch in FETs, operating at high power and high frequencies. Another example is 111-oriented diamond plates that are needed at synchrotrons such as the ESRF to serve as a beam splitter...
Mr
Mashikoane Mogodi
(University of the Witwatersrand)
17/11/2015, 18:14
Main
Poster Presentations
In this work we present the synthesis and structure-property investigation of anhydrous non-porous borophsophates BPO4 and hydrated porous (NH4)0.5Co1.25(H2O)2(BP2O8)(H2O)0.5 phases. Cristobalite-type BPO4 crystallizes in the tetragonal lattice, space group I-4 (No. 82) [1]. Variable-Temperature Powder X-ray...
Dr
Jürgen Härtwig
(European synchrotron Radiation Facility (ESRF))
, Prof.
Simon Connell
(University of Johannesburg)
17/11/2015, 18:16
Main
Poster Presentations
A crystal undulator is similar to a normal undulator as typically found at a synchrotron for the production of extremely brilliant X-ray beams. The difference is the magnetic lattice is realized by the periodic electrostatic potential of a crystal lattice seen from the reference frame of the GeV range electron or positron beam. The extremely relativistic incident particle beam is captured in...
Ms
Safiyyah Iqbal
(University of the Witwatersrand, Evolutionary Studies Institue)
17/11/2015, 18:18
Main
Poster Presentations
Therapsids were severely affected by the Permian-Triassic mass extinction event and only a few lineages were able to survive. One of the main behavioural responses that may have aided in Therapsid survival across the extinction was fossorialism. Several fossilized skeletons of the non-mammaliaform cynodont, Thrinaxodon were found in curled up position and assumed to have died in a burrow,...
Ms
Martine Moulin
(Institut Laue-Langevin, 38042 Grenoble, France,)
17/11/2015, 18:20
Main
Poster Presentations
Moringa oleifera is a tropical plant that belongs to the Moringaceae family and is native to northern India. The tree grows quickly and is cultivated in tropical areas. Moringa oleifera is also called The Miracle Tree1 because many of its parts have valuable applications. In particular, seed extracts from the plant have been used in traditional water treatment throughout Africa. The...
Prof.
Edward Mitchell
(ESRF)
, Dr
Juliette Devos
(ILL)
, Dr
Kubendran Naidoo
(University of the Witwatersrand and NHLS)
, Dr
Michael Haertlein
(ILL)
, Prof.
Theresa L Coetzer
(University of the Witwatersrand and NHLS)
, Prof.
V. Trevor Forsyth
(Keele University and ILL)
17/11/2015, 18:22
Main
Poster Presentations
Plasmodium falciparum is responsible for the vast majority of malaria cases and deaths, especially in sub-Saharan Africa. Progress towards malaria elimination is hampered by the lack of an effective vaccine, the rapid development of drug-resistant parasites and insecticide-resistant Anopheles mosquito vectors, and insufficient knowledge of the biology of the parasite, in particular of the...
Dr
Gavin Owen
(HIV Pathogenesis Research Unit, Department of Molecular Medicine and Haematology, University of the Witwatersrand)
17/11/2015, 18:24
Main
Poster Presentations
The HPRU has focused on the development of an effective prophylactic HIV vaccine which utilizes a novel immunogen called gp120-2dCD4S60C that consists of a human two domain CD4 with a S60C mutation covalently bound to monomeric gp120. This covalent complex acts as a “super immunogen” in pre-clinical studies in rabbits, where it elicits potent and broadly protective neutralizing antibody...
Mr
Sidiki Zongo
(College of Science, Engineering and Technology, UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology,University of South Africa)
17/11/2015, 18:26
Main
Poster Presentations
The present research introduces an environment friendly and rapid method for synthesis of CuO nanoparticles [1-3] for potential NLO applications. Copper oxide nanoparticles were synthesized from copper sulphate in the presence of natural saffron dye extracts at room temperature. TEM, SEM and EDX were initially used to characterize the biosynthesized nanoparticles. Spherical nanoparticles with...
Mr
Kaitano Dzinavatonga
(North West University)
17/11/2015, 18:28
Main
Poster Presentations
The aim of this was work was to assess the oxidative degradation risk and suggest conservation methods of certain historical documents. All the documents studied were obtained from the National Library of South Africa except one that was obtained from a private library at the city of Timbuktu, Mali. The Abbey pH pen method was used to check the pH level of all the samples. It was found that...
Ms
Oratile KGAODI
(BOTSWANA INTERNATIONAL UNIVERSITY OF SCIENCE & TECHNOLOGY)
17/11/2015, 18:30
Main
Poster Presentations
Letlhakane Mine DK/1 belongs to a cluster of about 85 kimberlite pipes, Orapa Kimberlitic Cluster, located approximately 240km west of the Francistown in the Boteti District of Central Botswana. It is one of the Orapa (AK/1) Letlhakane and Damtshaa (OLDM) diamond mines operated by Debswana Diamond Company.
The OLDM are experiencing a huge variance coefficient of rock strength within the same...
Ms
Ai Woon Yee
(ILL)
17/11/2015, 18:32
Main
Poster Presentations
Transthyretin (TTR) amyloidosis is the most common hereditary form of amyloidosis that is characterised by extracellular deposition of insoluble amyloid fibrils derived from misfolded protein in one or more organ systems in the body. It is an irreversible and progressive disease and is fatal within 10 years of onset. Autosomal dominant mutations in the TTR gene alter the protein stability...
Ms
Thabsile Thabethe
(University of pretoria)
17/11/2015, 18:34
Main
Poster Presentations
Tungsten (W) thin film was deposited on bulk single crystalline 6H-SiC substrate and annealed in H2 and Ar ambient at temperatures ranging from 700 to 1000 ºC for 1 hour. The resulting solid-state reactions, phase composition and surface morphology were investigated by Rutherford backscattering spectroscopy (RBS), grazing incidence X-ray diffraction (GIXRD) and scanning electron microscopy...
Prof.
Herman Winick
(SLAC National Accelerator Laboratory, Stanford University)
17/11/2015, 18:36
Main
Poster Presentations
Africa is the only habitable continent without a synchrotron light source. Many African scientists use facilities abroad. Even though South Africa has become a member of ESRF, the number of users is limited by distance and travel cost. A light source in Africa would give many more African scientists access to this tool. Momentum is now building for an African light source, as a collaboration...
Mr
Benjamin Brocco
(UJF)
17/11/2015, 18:38
Main
Poster Presentations
In bacteria, up to 30% of all proteins are translocated into or through the bacterial membrane. This mechanism relies on the trimeric SecYEG (translocon) complex, which forms a pore through the membrane and can open laterally in order to integrate trans-membrane protein into the lipid bilayer1. The energy required to perform the translocation is provided either by the ribosome...