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17 May 2024
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Story Anthony Mthembu
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Photo Supplied
Prof Magdalena Sobon from Poland and Michael Jackson Blebo from Ghana shared their expertise with staff and students during their visit to the Department of Fine Arts at the University of the Free State.
In a concerted effort to solidify its identity in South Africa and abroad, the Department of Fine Arts at the University of the Free State (UFS) recently played host to two distinguished artists: Prof Magdalena Sobon from the Wladyslaw Strzeminski Academy of Fine Arts in Lodz, and the Ghanaian multidisciplinary artist, Michael Jackson Blebo.
Dr Adelheid Von Maltitz, Senior Lecturer in the Department of Fine Arts at UFS, lauded the visits, held between 19 and 29 March 2024, as an enriching learning experience for the faculty and students within the department.
The visit highlights
During their visit to UFS, Prof Sobon and Blebo actively engaged with the department’s staff and students. Prof Sobon, an acknowledged paper-making artist, conducted a comprehensive two-day workshop, imparting extensive knowledge in this craft. As a direct outcome of this workshop, the department has procured the requisite equipment and materials, enriching the students’ capabilities in this medium. Blebo on the other hand, conducted a demonstration on clay bust modelling and both artists participated in critique sessions with the fourth-year students. Dr Von Maltitz underlined the significance of Blebo’s African heritage, noting, ‘’For our students to interact with a young, accomplished artist of his calibre is of benefit to them in terms of how they may envision their art careers.’’ Of particular note were Prof Sobon’s interactions with the students, wherein she shared her own artistic practices from her student years during her lectures.
In addition to their engagements with the students, Prof Sobon and Blebo also had the opportunity to present their research to second-year sculpture students at the Richmond Land Art Project, an off-campus initiative fostering art creation centred on socio-economic and other pertinent issues.
Future collaborations
Dr Von Maltitz emphasised the importance of maintaining ties with these eminent artists for the department’s growth and global outreach. Prof Sobon’s visit has paved the way for two department members to visit the Wladyslaw Strzeminski Academy of Fine Arts in Lodz in the near future. ‘’These individuals will get an opportunity to learn about studio setups and network with fellow academics, creative researchers, and artists,’’ stated Dr Von Maltitz. She hailed the visit by the two artists as both stimulating and fruitful, particularly for the students.
Research eradicates bacteria from avocado facility
2017-01-17
Listeria monocytogenes as seen under an electron
microscope. The photo was taken with a transmission
electron microscope at the microscopy unit of the UFS.
Bacteriophages (lollipop-like structures) can be seen
next to the bacterial cells.
Photo: Supplied
“The aim of my project was to identify and characterise the contamination problem in an avocado-processing facility and then to find a solution,” said Dr Amy Strydom, postdoctoral fellow in the Department of Microbial Biochemical and Food Biotechnology at the University of the Free State (UFS).
Her PhD, “Control of Listeria monocytogenes in an Avocado-processing Facility”, aimed to identify and characterise the contamination problem in a facility where avocados were processed into guacamole. Dr Strydom completed her MSc in food science in 2009 at Stellenbosch University and this was the catalyst for her starting her PhD in microbiology in 2012 at the UFS. The research was conducted over a period of four years and she graduated in 2016. The research project was funded by the National Research Foundation.
The opportunity to work closely with the food industry further motivated Dr Strydom to conduct her research. The research has made a significant contribution to a food producer (avocado facility) that will sell products that are not contaminated with any pathogens. The public will then buy food that is safe for human consumption.
What is Listeria monocytogenes?
Listeria monocytogenes is a food-borne pathogenic bacterium. When a food product is contaminated with L. monocytogenes, it will not be altered in ways that are obvious to the consumer, such as taste and smell. When ingested, however, it can cause a wide range of illnesses in people with impaired immune systems. “Risk groups include newborn babies, the elderly, and people suffering from diseases that weaken their immune systems,” Dr Strydom said. The processing adjustments based on her findings resulted in decreased numbers of Listeria in the facility.
The bacteria can also survive and grow at refrigeration temperatures, making them dangerous food pathogens, organisms which can cause illnesses [in humans]. Dr Strydom worked closely with the facility and developed an in-house monitoring system by means of which the facility could test their products and the processing environment. She also evaluated bacteriophages as a biological control agent in the processing facility. Bacteriophages are viruses that can only infect specific strains of bacteria. Despite bacteriophage products specifically intended for the use of controlling L. monocytogenes being commercially available in the food industry, Dr Strydom found that only 26% of the L. monocytogenes population in the facility was destroyed by the ListexP100TM product. “I concluded that the genetic diversity of the bacteria in the facility was too high and that the bacteriophages could not be used as a control measure. However, there is much we do not understand about bacteriophages, and with a few adjustments, we might be able to use them in the food industry.”
Microbiological and molecular characterisation of L. monocytogenes
The bacteria were isolated and purified using basic microbiological culturing. Characterisation was done based on specific genes present in the bacterial genome. “I amplified these genes with polymerase chain reaction (PCR), using various primers targeting these specific genes,” Dr Strydom said. Some amplification results were analysed with a subsequent restriction digestion where the genes were cut in specific areas with enzymes to create fragments. The lengths of these fragments can be used to differentiate between strains. “I also compared the whole genomes of some of the bacterial strains.” The bacteriophages were then isolated from waste water samples at the facility using the isolated bacterial strains. “However, I was not able to isolate a bacteriophage that could infect the bacteria in the facility.