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Three Vice-Deans appointed in the Faculty of Natural and Agricultural Sciences

29 September 2023 | Story Veena Naidoo | Photo Supplied

NAS Vice Deans — From left to right: Prof Johan van Niekerk (Vice-Dean for Agriculture), Prof Liezel Herselman (Vice-Dean for Teaching and Learning) and Prof Samuel Adelabu ( Vice-Dean for Research and Postgraduate Studies).

The University of the Free State is proud to introduce three esteemed academics who have been appointed as Vice-Deans within the Faculty of Natural and Agricultural Sciences. These appointments, effective from 1 September 2023, mark a significant milestone in enriching our academic leadership and promoting excellence in teaching, research, and innovation. The distinguished individuals selected for these roles bring a wealth of experience, expertise, and dedication, promising to elevate our institution to new heights.

Prof Johan van Niekerk: Vice-Dean for Agriculture

Prof Johan van Niekerk is a prominent figure in the field of Sustainable Food Systems and Development. With a PhD in Sustainable Agriculture and extensive experience in academia, Prof Van Niekerk is well-positioned to lead as the Vice-Dean for Agriculture at the University of the Free State. He has a strong vision for steering the Faculty of Natural and Agricultural Sciences towards financial sustainability and global recognition.

One of Prof Van Niekerk's primary goals as Vice-Dean is diversifying funding sources for the faculty, aiming to extend beyond government funding by establishing strategic partnerships with industries and foundations. His active involvement in regional and global agricultural forums underscores his commitment to collaborative research initiatives, further enhancing our faculty's reputation.

In response to the pressing issue of climate change, Prof Van Niekerk's research vision is centred on sustainable agricultural production. He plans to leverage the Paradys Experimental Farm, integrating research, teaching, and practical experiences to fortify our foundation for sustainable agricultural innovation. This approach is designed to equip our students for a rapidly evolving employment market and aligns with the university's Vision 130 and the UN Sustainable Development Goals (SDGs).

On his appointment, Prof Van Niekerk said, “I am excited about this position's prospects and am confident that agriculture will help deliver the SDGs and the UFS Vision 130. I look forward to contributing to the continued success of the Faculty of Natural and Agricultural Sciences.”

Prof Liezel Herselman: Vice-Dean for Teaching and Learning

Prof Liezel Herselman, a distinguished academic with nearly three decades of experience, has assumed the role of Vice-Dean for Teaching and Learning. Her extensive academic journey, including various leadership roles within the university, showcases her dedication to education and academic advancement.

In this vital role, Prof Herselman will focus on strategic matters, curriculum innovation, and compliance with academic regulations. Her objective is to align the curricula with Vision 130, making the Faculty of Natural and Agricultural Sciences the preferred choice for prospective students. Prof Herselman emphasises digital transformation and entrepreneurial projects to provide a cutting-edge educational experience for students, ensuring they meet industry needs and are ready for future employability challenges.

On assuming her new position as Vice-Dean Prof Herselman said, “I am honoured and excited about receiving this opportunity to make a positive and constructive contribution to our faculty. I am still to learn the ropes of some of the teaching and learning processes, but I am looking forward to expanding my knowledge and having to move out of my current comfort zone.”

Prof Samuel Adelabu: Vice-Dean for Research and Postgraduate Studies

Prof Samuel Adelabu, an esteemed expert in Geography, has been appointed as the Vice-Dean for Research and Postgraduate Studies. Prof Adelabu has a profound interest in the application of remote sensing and geographic information systems, making him well-suited to lead research and postgraduate activities within the Faculty of Natural and Agricultural Sciences.

His portfolio includes promoting impactful research and postgraduate initiatives in line with the university's Vision 130, with a special focus on visibility, renewal, and reimagination. Prof Adelabu's leadership is anticipated to foster a thriving research culture and enrich the postgraduate experience at the UFS.

Commenting on his appointment Prof Adelabu remarked, “I am excited about the opportunity to bring my expertise and leadership as Vice-Dean for Research and Postgraduate Studies to the faculty, and work with a team of dedicated professionals to advance the institution's research and postgraduate agenda.”

Future endeavours

These appointments underscore the university’s unwavering commitment to fostering a culture of excellence, research innovation, and enhanced learning experiences. The collective expertise and dedication of Prof Johan van Niekerk, Prof Liezel Herselman, and Prof Samuel Adelabu promise a bright future for their respective faculties and the university at large. We extend our hearty congratulations and eagerly anticipate the positive impact they will bring to our academic community.

News Archive

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.

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