Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
03 August 2020 | Story Nitha Ramnath | Photo Supplied
Prof Ivan Turok.

The University of the Free State is pleased to announce that the Human Sciences Research Council’s (HSRC) Prof Ivan Turok has been awarded a research chair by the South African Research Chairs Initiative (SARChI). Prof Turok is one of South Africa’s most cited social scientists. He will hold the Research Chair in City-Region Economies in the Department of Economics and Finance and the Centre for Development Support at the UFS. The UFS is now home to six SARChI chairs.  

The research chair is the first partnership of its kind between a South African university and the HSRC. The chair will seek to understand how cities can accelerate economic growth and inclusive development in SA. It will analyse why some cities are more successful than others, and what policies and practices can improve conditions for citizens and communities. It will also provide funding to increase research capacity through the appointment of postdoctoral, PhD, and master’s students.

SARChI is a government intervention aimed at strengthening the scientific research and innovation capacity of South African universities. It was established by the Department of Science and Technology in 2006 and is managed by the National Research Foundation (NRF). According to the NRF, its prestigious research chair is awarded to established researchers who are recognised internationally for their research contributions.  

“Prof Turok’s appointment as Research Chair is a great honour for the university. He is a highly rated researcher and his knowledge of city-region economies will be of exceptional value to the university’s research portfolio, as well as to the country’s agenda of transforming urban areas. Our country is in dire need of research in this area, in which Prof Turok will be playing a significant role,” said Prof Francis Petersen, Rector and Vice-Chancellor of the UFS. 

According to Prof Lochner Marais, Head of the UFS Centre for Development Support, the research chair will have four main themes: The Urban System – Demographics and Economics; Economic Sectors in Space; Dynamic Places; and Strategic Urban Assets. The chair brings together research from the Departments of Economics and Finance, Urban and Regional Planning, and the Centre for Development Support. The long-term goal is to develop the chair into a centre of excellence.

“The chair is co-funded by the South African Cities Network. All research will speak directly to the South African Cities Network’s agenda of transforming urban areas in the country,” Prof Marais adds.

In congratulating Prof Turok, the CEO of the Human Sciences Research Council, Prof Crain Soudien, said, “It is fitting that this research chair has been awarded to Prof Turok.  It is a culmination of many years of work in the area of city regions through which he has earned a sterling reputation as a scholar in this area of work.”

Prof Turok has authored more than 150 peer-reviewed publications and 11 books/monographs. He holds an NRF B1-rating and is the former Editor-in-Chief of the top international journal, Regional Studies. He is currently Executive Director: Economic Performance and Development at the Human Sciences Research Council and was Chairman of the Durban City Planning Commission. He was formerly Professor of Urban Economic Development, and Director of Research: Department of Urban Studies at the University of Glasgow. Prof Turok was also a Mellon Fellow at the University of Cape Town and Professor of Urban and Regional Planning at the University of Strathclyde. He is an occasional adviser to the United Nations, OECD, African Development Bank, UNECA, and several national governments. His recent books include Transitions in Regional Economic Development (2018, Routledge), Value Chains in Sub-Saharan Africa (2019, Springer), and Restoring the Core: Central City Decline and Transformation in the South (2020, Elsevier). He has a PhD in Economics from the University of Reading.

News Archive

Research eradicates bacteria from avocado facility
2017-01-17

 Description: Listeria monocytogenes Tags: Listeria monocytogenes

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.

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept