Conveners
Scientific Talks: Block 1
- Herman Winick (SLAC National Accelerator Laboratory, Stanford University)
Scientific Talks: Block 2
- Tshepo Ntsoane (Necsa)
Scientific Talks: Block 3
- Krystle McLaughlin (Lehigh University)
Scientific Talks: Block 4
- Schadrack Nsengiyumva (Rhodes University)
Scientific Talks: Block 5
- Diouma KOBOR (University Assane Seck of Ziguinchor)
Scientific Talks: Block 6
- Paul Dumas (SOLEIL Synchrotron)
Scientific Talks: Block 7
- PROSPER Ngabonziza (University of Twente, MESA+ Institute for nanotechnology)
Scientific Talks: Block 8
- Hafida Boutefnouchet (Laboratoire de Métallurgie et Génie des Matériaux)
Dr
Hester du Plessis
(Sasol)
16/11/2015, 09:50
Main
Oral Presentations
Sasol is an international integrated energy and chemical company that develops and commercializes chemical technologies. The company is listed on the Johannesburg and New York stock exchanges. Sasol’s experience and understanding of Fischer Tropsch synthesis provides us with a unique reliable energy value proposition nationally and internationally. Sasol’s global presence includes a number of...
Prof.
Ralf Seemann
(Saarland University & MPI-DS, Göttingen)
16/11/2015, 10:20
Main
Oral Presentations
The forced imbibition or drainage of an aqueous phase into an initially oil filled bead matrix is studied. The advancement of the water front is imaged in real-time using ultrafast x-ray tomography. The 3d time series are analysed in terms of oil saturation, front area and morphology of the pore-throat filling behaviour. The displacement behaviour hardly depends on gravitational effects and...
Prof.
Sine Larsen
(University of Copenhagen)
16/11/2015, 11:30
Main
Oral Presentations
An overview will be given of how synchrotron radiation has revolutionized structural biology. To day the experiments are facilitated by the highly automated beamlines for diffraction and small angle scattering, and through partnerships like the PSB (Partnership for Structural Biology) in Grenoble complementary techniques are made available. These advances will be illustrated by our studies of...
Mr
Prosper Ngabonziza
(University of Twente, MESA+ Institute for nanotechnology)
16/11/2015, 12:00
Main
Oral Presentations
In the first half of this talk will focus on three-layered strontium ruthenate single crystals. Strontium ruthenates of the Ruddlesden-Popper (R-P) series Srn+1RunO3n+1 have been subject to intensive research since they exhibit distinct collective physical phenomena that are due to the change of the number n of the RuO6 octahedra layers in the unit...
Dr
Andrew Venter
(Research and Development Division Necsa SOC Limited; DST-NRF Centre of Excellence in Strong Materials)
16/11/2015, 12:20
Main
Oral Presentations
Residual stress is a double-edged sword since tensile stresses, especially when existing close to surfaces, can lead to component failure due to stress corrosion cracking, whist compressive stresses mitigate against crack formation and propagation. Diffraction techniques enable analyses of the prevailing residual stress conditions from direct investigation of the lattice plane spacing. By...
Dr
Mohammed Elmallah
(Department of Chemistry - Faculty of Science - Helwan University)
16/11/2015, 12:40
Main
Oral Presentations
Prion diseases, also called transmissible spongiform encephalopathies (TSEs), comprise a group of fatal neurodegenerative disorders that affect both humans and animals. Human forms of prion disease include Creutzfeldt-Jakob disease (CJD), Gerstmann-Sträussler-Scheinker syndrome (GSS), fatal familial insomnia (FFI), and kuru. Prion diseases affecting animals include scrapie in sheep and goat as...
Dr
Qun Shen
(Brookhaven National Laboratory)
16/11/2015, 14:20
Main
Oral Presentations
The 12th International Conference on Synchrotron Radiation Instrumentation (SRI2015) was hosted by National Synchrotron Light Source II (NSLS-II) and held in New York City, July 6-10, 2015. This triennial conference brought together scientists and engineers from around the world to highlight the most exciting science and technology developments in the synchrotron and free-electron laser light...
Mr
Igor Likhachev
(NRC "Kurchatov Institute")
16/11/2015, 14:50
Main
Oral Presentations
X-ray methods for diagonostic of nanosized heterostructures are long proved reliable instrument for analysis of real structure of multilayer heterocompositions and determination of parameters for single layers and interfaces.
In given work we used high-resolution x-ray diffraction and x-ray reflectivity methods for the analysis of spintronic maultilayer heterosystems. Spintronic is a new...
Dr
Paul Dumas
(SOLEIL Synchrotron)
16/11/2015, 15:10
Main
Oral Presentations
Infrared spectroscopy and microscopy may look an exotic analytical tool in biology. It’s rather known for identification of molecular vibrational motion in chemistry , physics, geology, space science…. But, the technique has clearly showed its potential when a synchrotron source was thought to be used instead of a traditional thermal source (also called lab-source).
Vibrational spectroscopy...
Dr
Elena Tereschenko
(NRC Kurchatov Institute, Institute of Crystallography RAS)
16/11/2015, 16:10
Main
Oral Presentations
The grazing incidence x-ray standing wave technique (XSW) is widely used for thin layered structure investigation. It is based on simultaneous analysis of x-ray reflectivity and x-ray fluorescence yield modulated by standing wave field formed due to the interference of the incident and reflected beams. While the reflectivity is sensitive to general distribution of electron density the angular...
Mr
Tshepo Ntsoane
(Necsa)
16/11/2015, 16:30
Main
Oral Presentations
Hydroxyapatite coatings (HAp composed of Ca10(PO4)6OH2), deposited by air-plasma spray onto cylindrical Ti6Al4V rods were investigated in the as-coated and fatigued conditions. Through-thickness characterisation was carried out using conventional X-ray (near surface in reflection mode) and Synchrotron radiation (depth dependence in...
Dr
Ehab Essawy
(Lecturer of Biochemistry, Chemistry Dept., Faculty of science, Helwan University.)
16/11/2015, 16:50
Main
Oral Presentations
Protein Crystallography is a highly throughput technique used to assess the structure-function relationship of biological macromolecules. Obtaining accurate and reliable three-dimensional structures are the basic prerequisites for rational drug design. Childhood Acute Lymphoblastic Leukemia (ALL), cancer of white blood is our goal. It comprises the most common kind of childhood cancer. Many...
Prof.
Luc SALVO
(SIMAP-GINP-UGA)
17/11/2015, 09:00
Main
Oral Presentations
X-ray tomography is becoming a standard characterisation in a numerous materials science research field : room or high temperature damage in composites of metals, solidification, sintering …[1] More than 3D images it is possible since several years to perform 4D investigation providing dedicated experimental set up are developed. For example 4D studies were performed in various domains :...
Dr
Roman Senin
(NRC "Kurchatov institute")
17/11/2015, 09:30
Main
Oral Presentations
Synchrotron source of NRC “Kurchatov Institute” has a long story. It was found as a light source for microelectronic production later it was transformed into scientific facility. Years of development led to multidisciplinary scientific institution. The upgrade Phase-I gave possibility extend experimental hall and supporting labs, install new, modern beamlines and insertion devices. During the...
Dr
Simon Kimber
(ESRF)
17/11/2015, 09:50
Main
Oral Presentations
The imaging of catalysts and other functional materials under reaction conditions has advanced significantly in recent years. The combination of the computed tomography (CT) approach with methods such as X-ray diffraction (XRD), X-ray fluorescence (XRF), and X-ray absorption near edge spectroscopy (XANES) now enables local chemical and physical state information to be extracted from within the...
Dr
Kristian Carlson
(Evolutionary Studies Institute, University of the Witwatersrand)
17/11/2015, 10:20
Main
Oral Presentations
While possibilities exist for using high resolution X-ray based technology (e.g., microCT) in South Africa, synchrotron technology offers a number of additional, crucial advantages to palaeoscientists that create unique opportunities for addressing scientific questions. Its non-destructive nature and high resolution imaging capability (e.g., submicron spatial resolutions) are especially...
Dr
Oliver Seeck
(Deutsches Elektronensynchrotron DESY)
17/11/2015, 11:10
Main
Oral Presentations
Today's societies are eminently depending on the access to permanently available energy sources. However, more than 80% of the worldwide energy consumption is based on ultimately finite resources such as fossil fuels and nuclear power. Therefore, huge efforts are taken to provide the growing world population with permanent sustainable energy.
One of these energy sources is the sunlight...
Dr
Alexander Trigub
(NRC "Kurchatov Institute")
17/11/2015, 11:40
Main
Oral Presentations
Gold in ores of hydrothermal and magmatic origin deposits in the form of its own crystalline phase (usually in the form of an alloy with the silver - electrum) or dispersed in sulfides as isomorphic impurity, nanosized particles Au° or chalcogens and compounds with semimetals (As, Sb, Bi, Te). Scattered ("invisible") form of gold is much more difficult to remove when ore processing, and most...
Dr
Krystle McLaughlin
(Lehigh University)
17/11/2015, 12:00
Main
Oral Presentations
Towards Structural Characterization of Novel Mycobacteriophage Proteins
Interest in bacteriophages- viruses that infect bacterial hosts- has been increasing as the potential for bacteriophages to serve as alternatives to antibiotics is being investigated once more. Isolation and genomic annotation of mycobacteriophages that infect Mycobacterium smegmatis, a closely related strain of the...
Prof.
Simon Billinge
(Columbia University)
17/11/2015, 12:20
Main
Oral Presentations
The discovery of new materials lies at the heart of future technologies, whether they are high energy density batteries for next generation electric cars, or locally sustainably manufacturable photovoltaics for off-grid African villages. Since materials derive their properties from the atomic arrangements, a starting point is characterize the structure and relate it to properties and...
Mr
Bjorn von der Heyden
(Stellenbosch University)
17/11/2015, 12:50
Main
Oral Presentations
L-edge XANES spectroscopy has been used to identify the speciation of iron (Fe) in natural samples. The majority of previous analyses are limited to the identification of Fe(II) versus Fe(III) speciation in complex natural samples however, these spectra are rarely used to identify different mineral phases in soils and sediments. Using the fine spectral variations between different crystalline...
Dr
Loïc BERTRAND
(IPANEMA, CNRS, MCC, Paris-Saclay)
17/11/2015, 14:30
Main
Oral Presentations
IPANEMA, the research platform for ancient materials located in Paris-Saclay, is a centre for the development of advanced methodologies of material characterization in archaeology, past environments, paleontology and cultural heritage, and the support of synchrotron research through external users hosted on the platform. IPANEMA develops and provides a set of techniques for preparing...
Mr
Kinnock Vundawaka Munthali
(University of Pretoria and University of Namibia)
17/11/2015, 15:00
Main
Oral Presentations
Light-emitting diodes (LEDs) are semiconductor devices that emit light in a narrow-band spectrum with wavelengths ranging from the infrared to the ultraviolet. This paper will look at the fabrication techniques and characterisation of high temperature operating LEDs from silicon carbide (SiC). SiC has a wide band gap and high thermal conductivity. These unique properties make SiC an ideal...
Prof.
David Billing
(University of the Witwatersrand)
17/11/2015, 15:20
Main
Oral Presentations
Synchrotron radiation has and will undoubtedly continue to play a vital role in the advancement of many important scientific and technological endeavours. However there remain huge obstacles and limitations to it becoming more generally usable, especially to this African researchers.
Mr
Ian Eliovich
(IC RAS)
17/11/2015, 15:40
Main
Oral Presentations
My report focuses on the proposal, development and successful testing of the controlled elements for X-ray optics based on the lithium niobate crystals structures. Using such elements allows to achieve a scanning range of hundreds of angular seconds, even at low supply voltage. In addition, experiments that demonstrate the absence of hysteresis in such elements were performed. In this case it...
Dr
Paul Tafforeau
(ESRF)
, Dr
Vincent Fernandez
(European Synchrotron Radiation Facility)
17/11/2015, 16:30
Main
Oral Presentations
Palaeontologists have always sought for new techniques aiming to retrieve more and more information from the fossils they discovered. Until recently, one of the most difficult problems to overcome was the non-destructive visualization of inner structures, to access the numerous information for the understanding of life evolution on Earth. Using X-rays to scrutinize fossils rapidly appeared as...
Mr
Andrew Gotz
(ESRF)
, Mr
Jean-Michel Chaize
(ESRF)
17/11/2015, 17:00
Main
Oral Presentations
TANGO is a toolkit for building control systems. It started originally at the ESRF in 1999 and has reached maturity since a while but keeps on being improved. It is a Free Open Source toolkit which can be downloaded and installed on Linux, Windows or Macintosh. Binary packages exist for Debian Linux and Windows. TANGO is used on many sites in Europe including synchrotrons, lasers, wind...
Dr
O.P. Oladijo
((1) Department of Chemical, Materials and Metallurgical Engineering, Botswana International University of Science and Technology, Palapye, Botswana (2) School of Chemical and Metallurgical Engineering, University of the Witwatersrand, South Africa (3) DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand South Africa)
17/11/2015, 17:20
Main
Oral Presentations
The investigation was conducted to determine the residual stresses of thermally sprayed HVOF WC-17Co coatings on different alloy substrates by non-destructive techniques. Non-destructive determination of residual stresses in the WC-Co coated systems was exceptionally challenging because coatings were only about 200 microns thick. The best-suited techniques for investigation of the WC coatings...
Dr
Nikoletta Bathori
(Cape Peninsula University of technology)
17/11/2015, 17:40
Main
Oral Presentations
The enantiomeric purity of a chemical entity is important in various industries, such as analytical, food, pesticide and pharmaceutical. When a compound is produced as a racemic modification typically only one of the enantiomers exhibits the required biological effect. One of the main resolution method is based on the formation of diastereomeric salts. The full understanding of the mechanism...
