Conveners
AfLS2: Block 2b
- Kenenth Evans-Lutterodt (Brookhaven National Labs)
AfLS2: AfLS2 : Block 3b
- Philip Oluseyi Oladijo (Botswana International University of Science and Technology)
AfLS2: Block 6b
- Lawrence Norris (National Society of Black Physicists)
AfLS2: Block7b
- Tabbetha Dobbins (Rowan University)
AfLS2: Block 10c
- There are no conveners in this block
Dr
Thierry d'Almeida
(CEA France)
29/01/2019, 11:00
AfLS2 track
Oral Presentations
X-ray experimental and analysis techniques are indispensable tools for addressing major challenges in many fields, including health, energy, agriculture and environment. Hence, building a Light Source Facility somewhere in Africa in the near future is a key priority that is being addressed through the efforts of both the African Light Source Foundation and the Light Source for Africa, the...
Dr
Dodoo-Arhin David
(University of Ghana)
29/01/2019, 11:30
AfLS2 track
Oral Presentations
The Whole Powder Pattern Modelling technique was employed to investigate the microstructure changes in Cuprous Oxide powders milled in a vibrating cup mill. The effect of milling on the microstructure evolution was investigated using Synchrotron Radiation XRD and standard XRD line profile analysis supported with HRTEM and ESEM techniques. The reduction in the average size of coherently...
Prof.
Diouma Kobor
(University Assane Seck of Ziguinchor)
29/01/2019, 11:45
AfLS2 track
Oral Presentations
PZN-PT single crystals showed properties up to 10 times more interesting than
those of the ferroelectric perovskite materials currently used. However, the
greatest difficulty to use PZN-4.5PT single crystals on electronic devices is to
achieve them in thin layers form because of their incongruent melting property.
In this work we fabricate with success thin films by dispersing...
Dr
Bjorn von der Heyden
(Stellenbosch University)
29/01/2019, 12:00
AfLS2 track
Oral Presentations
Recent advancements in synchrotron technology have resulted in the advent of an era in which ultra-high brilliance "Fourth Generation" synchrotron light sources promise to contribute significantly to high-level scientific research. These X-rays provide tuneable, high energy, and high brilliance X-rays that can measure sub-ppm elemental concentrations on spatial scales approaching 10 nm....
Dr
Philip Oluseyi Oladijo
(Botswana International University of Science and Technology)
29/01/2019, 12:15
AfLS2 track
Oral Presentations
High-velocity oxy-fuel (HVOF) thermal spraying is also a common deposition method used, producing coatings of thickness ranging between 200 to 500 μm on engineering components. Despite the attention received by HVOF over the years, studies have shown that there is less attention given to the development of thick coatings for repair applications, most especially within the aerospace industry....
Prof.
Ralf Flaig
(Diamond Light Source)
29/01/2019, 12:30
AfLS2 track
Oral Presentations
CryoEM is now a major driver of structural biology, especially for complex systems. It is possible to obtain structures at better than 2 A resolution in favourable cases, and also possible to obtain 3 A structures of complexes larger than 100 MDa in mass. Beyond this, new methods are emerging which allow lower resolution visualisation of complex structures within living cells. Most structural...
Dr
Kudakwashe Jakata
(University of the Witwatersrand)
29/01/2019, 14:00
AfLS2 track
Oral Presentations
Fossils remains of animals that existed in periods such as the Permian, Triassic and Jurassic eras have been discovered in Africa. There is also an extensive collection of human ancestral remains from a few million years ago or less that have been found such as Australopithecus Sediba, Turkana Boy (Homo ergaster), Zinjathropus (Parantropus boisei) and Sahelanthropus tchadensis which have added...
Prof.
Wolf-Dieter Schubert
(University of Pretoria)
29/01/2019, 14:30
AfLS2 track
Oral Presentations
Review of Bioscience highlights from Africa and the START programme from a Bioscience perspective
Prof.
mario campanelli
(UCL)
29/01/2019, 15:00
AfLS2 track
Oral Presentations
One of the missions of particle physics laboratories is to foster public interest in the discipline, explain to the public the results of the research and create a link between the scientists and the public. CERN has a long-standing tradition in outreach and communication with the public, recently revamped by the use of social media and new initiatives specifically targeting schools. This...
Kenenth Evans-Lutterodt
(Brookhaven National Labs)
29/01/2019, 15:15
AfLS2 track
Oral Presentations
Studying materials with high energy ( > 50 keV ) X-ray photons brings some advantages for materials characterization. For example, the pair distribution function method (PDF) gets better real space resolution with higher energy photons. The ability to focus X-ray beams of high energy photons brings further experimental benefits for materials characterization, including greater flux on small...
Dr
Saphina Biira
(Busitema University Uganda)
29/01/2019, 15:30
AfLS2 track
Oral Presentations
High temperature nuclear reactors use TRISO (tristructural isotropic) fuel particles for
containment of radioactive fission products. TRISO particles consist of uranium oxide coated
uniformly with low density pyrocarbon, high density inner pyrocarbon, silicon carbide (SiC), and
dense outer pyrocarbon. In these particles, SiC is the main barrier for containing solid fission
products. These...
Dr
Mashikoane Mogodi
(European Synchrotron Radiation Facility (ESRF))
29/01/2019, 15:45
AfLS2 track
Oral Presentations
Keywords: borophosphates, high-temperature, dehydration, thermal-induced amorphisation, in-
situ synchrotron XRPD
Theme: Crystal Engineering and Structural Chemistry
Four CZP (chiral zincophosphate) zeolite topology compounds [1] with the general formula
MIMII (H2O)2[BP2O8].yH2O (MI = Na, NH4 and MII = Mn, Co, y = 0.5, 1) have been prepared
under mild hydrothermal conditions (at 180...
Dr
Ian Swainson
(IAEA)
30/01/2019, 10:30
AfLS2 track
Oral Presentations
IAEA supports a variety of activities concerning large scale facilities. With respect to neutrons, our activities include technical meetings and coordinated research projects on topics such as neutron detection, and modern cold moderators for research reactors and accelerator-based neutron sources. We also support via national Technical Cooperation projects the development of neutron...
Dr
Mkwizu Tumaini
(University of the Witwatersrand)
30/01/2019, 11:00
AfLS2 track
Oral Presentations
START - Synchrotron Techniques for African Science and Technology, is Research Councils United Kingdom (RCUK) funded research consortium under its Global Change Research Fund (GCRF) programme, primarily to facilitate access and collaboration around the use of Synchrotron Techniques. Towards this end, the consortium is organised two distinct thematic lines, that address their respective needs...
Dr
Thabsile Thabethe
(University of Pretoria)
30/01/2019, 11:15
AfLS2 track
Oral Presentations
The irradiation effect of swift heavy ions on palladium (Pd) films deposited on 6H-SiC was investigated. The samples were irradiated by Xe26+ ions with the energy of 167 MeV at fluences of 1 × 1013 cm-2 and 3 × 1014 cm-2 at room temperature. Phase identification, residual stress and surface morphology were investigated with X-ray...
Prof.
Paul Kingsley Buah-Bassuah
(Laser and Fibre Optics Centre (LAFOC) Department of Physics University of Cape Coast, Ghana)
30/01/2019, 11:30
AfLS2 track
Oral Presentations
Laser sources have undergone a lot of innovation covering almost all the electromagnetic
spectrum. The use of lasers in Agriculture, industry, medicine, material science, molecular
biology, holography and energy turns to put a better price on investing into such technology.
This paper attempts to introduce photonics as a main tool in Laser applications and the
fabrication of free electron...
Prof.
Tabbetha Dobbins
(Rowan University)
30/01/2019, 11:45
AfLS2 track
Oral Presentations
Our research uses several specialized synchrotron X-ray techniques to elucidate the interactions between transition metal salts additives and hydride host structures. The presentation will describe those techniques and their use in describing the physical and chemical processes occurring between the hydrides and catalysts.
Dr
Loredana Casalis
(Elettra Sincrotrone Trieste)
30/01/2019, 12:00
AfLS2 track
Oral Presentations
Cell signalling, strongly involves plasma cell membranes, is at the basis of any cell communication process: errors in signalling interactions cause the development of diseases. The number of complex and dynamical interactions between the molecules involved is huge. Therefore model systems are required to reduce such complexity.
In order to mimic lipid and protein organization of cellular...
Prof.
Abidemi Paul Kappo
(Biotechnology and Structural Biology (BSB) Group, University of Zululand, KwaDlangezwa, South Africa)
30/01/2019, 12:15
AfLS2 track
Oral Presentations
The formation of high quality and perfect crystals forms the bottleneck and rate-limiting step for structure determination by X-ray crystallography. Protein crystallography has formed an intricate part of the chemical, biotechnology and pharmaceutical industry as an important tool towards drug design, protein engineering and in understanding various biological systems. In this study, a...
Prof.
Simon Billinge
(Columbia University)
30/01/2019, 14:00
AfLS2 track
Oral Presentations
Shared facilities, such as synchrotron sources, are important and dynamic hubs for scientific collaboration and innovation. They also proved state of the art capabilites that can catapault science forwards and provide a focal point in scientific communities, as well as providing important capabilities for industry to develop new products. I will describe how we have used synchrotrons to...
Dr
Edward Mitchell
(ESRF)
30/01/2019, 14:30
AfLS2 track
Oral Presentations
The OPEN SESAME (www.opensesame-h2020.eu) project is supporting optimal exploitation of the Synchrotron light for Experimental Science and Applications in the Middle East (SESAME) light source. With this aim, OPEN SESAME has three key objectives:
1. To train SESAME staff in the storage ring and beamline instrumentation technology, research techniques and administration for optimal use of a...
Dr
Ernest malamud
(Co-founders, SciTech Science Center, Illinois)
, Ms
Olivia Diaz
(Co-founders, SciTech Science Center, Illinois)
30/01/2019, 15:00
AfLS2 track
Oral Presentations
In this talk, presented jointly, we will briefly summarize our multi-faceted experience over several decades of building resources to fund ambitious goals.
Some of these goals were establishing a new regional hands-on science center,
running an important political campaign and saving a treasured mountain lodge.
We will share the lessons learned of what worked and what didn’t work. The major...
Dr
Kirill Yusenko
(Bundesanstalt für Materialforschung und -prüfung (BAM))
30/01/2019, 15:30
AfLS2 track
Oral Presentations
The BAMline was the first hard X-ray beamline being installed at BESSY II in 2001 [1]. Owed to a 7 Tesla wavelength shifter (WLS) installed at the electron storage ring, a continuous broad energetic spectrum up to 100 keV is achieved. The available analytical methods fall into the three main groups: X-ray fluorescence spectroscopy (XRF), X-ray absorption spectroscopy (XAS) and X-ray computed...
Dr
Ana Buzanich Guilherme
(Bundesanstalt für Materialforschung und -prüfung (BAM)
30/01/2019, 15:45
AfLS2 track
Oral Presentations
The BAMline and the µSpot beamlines are hard X-ray multipurpose stations. The common X-ray source is a 7 Tesla wavelength shifter (WLS) installed at the Berlin Electron Storage Ring for Synchrotron Radiation (BESSY II). Such source enables a continuous broad energetic spectrum up to 100 keV, which is optimal for implementing various analytical methods. The BAMline was the first hard X-ray...
Dr
Francesco Sette
(European Synchrotron Radiation Facility (ESRF))
31/01/2019, 10:30
AfLS2 track
Oral Presentations
I will review the Operation of the ESRF during its last 30 years, highlighting its role in constructing the international community of synchrotron users
Prof.
Hitoshi Abe
(Photon Factory (PF), Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK))
31/01/2019, 11:25
AfLS2 track
Oral Presentations
X-ray Absorption Fine Structure (XAFS) is one of the most widely used methods at synchrotron facilities. XAFS is a suitable nondestructive method to observe chemical states elements and local structures around elements of interest in not only crystalline or solid but also amorphous or liquid samples. From a crystallographic point of view, If we have crystalline samples, it's good to perform...
Dr
Giorgio Paolucci
(SESAME)
31/01/2019, 11:50
AfLS2 track
Oral Presentations
Science at SESAME: Research highlights, Socio-economic impacts and insights for the AfLS
Prof.
Catlow Richard
(Richard Catlow; Department of Chemistry, University College London; School of Chemistry, Cardiff University; UK Catalysis Hub, Research Complex at Harwell, UK)
31/01/2019, 12:15
AfLS2 track
Oral Presentations
We will describe how the concerted use of synchrotron radiation methods with modelling techniques can yield unique information on structures, dynamics and mechanism in a range of catalytic and energy materials. Our discussion will concentrate on the the structures and reactivities of oxide supported nano-particulate catalysts, including insights in the re-structuring of nano-particles during...
