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15 July 2022 | Story Lacea Loader

The Council of the University of the Free State (UFS) approved the lifting of the institution’s COVID-19 Regulations and Required Vaccination Policy with immediate effect.

“Since the declaration by the Government on 22 June 2022 that the COVID-19 regulations will be repealed, the UFS has conducted a risk assessment to determine the risk of exposure to staff and students. From the assessment, it was clear that the university’s COVID-19 infections are currently a low risk,” said Prof Francis Petersen, Rector and Vice-Chancellor of the UFS.

Factors that contributed to this low risk include the following:

  • No COVID-19 positive cases among UFS staff and students have been reported in the past month.
  • The high number of vaccinations among UFS stakeholders. In addition, the current national immunity level of the total South African population is high.
  • Certain faculties and postgraduate students are currently proceeding with hybrid/online learning, which minimises the risk of possible COVID-19 infections on the university’s three campuses.
  • In its correspondence of 23 June 2022, the UFS urged all staff and students to continue wearing masks should they have comorbidities and/or symptoms of illness, thus safeguarding other stakeholders.

“We believe that COVID-19 no longer poses an immediate threat to the safety of our staff and students, and that the pandemic is at a stage where they should take responsibility for their own safety. This can be mainly ascribed to the success of the implementation of the policy. Staff and students who still wish to wear masks are urged to do so at their own discretion. Those who have not yet been vaccinated against the virus and have no

known condition preventing them from doing so, are advised to get vaccinated for their own safety and protection,” said Prof Petersen.

The UFS COVID-19 Regulations and Required Vaccination Policy was approved by the University Council on 26 November 2021 and implemented on 6 December 2021. The university commenced restricting unvaccinated individuals from accessing its campuses as of 14 February 2022.

“If the national regulatory environment with respect to COVID-19 is changing to such an extent that the policy needs to be re-implemented, the university’s executive management will act accordingly, and hence the COVID-19 Regulations and Required Vaccination Policy remains a policy of the university as approved by the UFS Council on 26 November 2021.” said Prof Petersen.

 

Uplifting of the COVID-19 vaccination policy - mitigation strategies of the University of the Free State.

News Archive

Nanotechnology breakthrough at UFS
2010-08-19

 Ph.D students, Chantel Swart and Ntsoaki Leeuw


Scientists at the University of the Free State (UFS) made an important breakthrough in the use of nanotechnology in medical and biological research. The UFS team’s research has been accepted for publication by the internationally accredited Canadian Journal of Microbiology.

The UFS study dissected yeast cells exposed to over-used cooking oil by peeling microscopically thin layers off the yeast cells through the use of nanotechnology.

The yeast cells were enlarged thousands of times to study what was going on inside the cells, whilst at the same time establishing the chemical elements the cells are composed of. This was done by making microscopically small surgical incisions into the cell walls.

This groundbreaking research opens up a host of new uses for nanotechnology, as it was the first study ever in which biological cells were surgically manipulated and at the same time elemental analysis performed through nanotechnology. According to Prof. Lodewyk Kock, head of the Division Lipid Biotechnology at the UFS, the study has far reaching implications for biological and medical research.

The research was the result of collaboration between the Department of Microbial, Biochemical and Food Biotechnology, the Department of Physics (under the leadership of Prof. Hendrik Swart) and the Centre for Microscopy (under the leadership of Prof.Pieter van Wyk).

Two Ph.D. students, Chantel Swart and Ntsoaki Leeuw, overseen by professors Kock and Van Wyk, managed to successfully prepare yeast that was exposed to over-used cooking oil (used for deep frying of food) for this first ever method of nanotechnological research.

According to Prof. Kock, a single yeast cell is approximately 5 micrometres long. “A micrometre is one millionth of a metre – in laymen’s terms, even less than the diameter of a single hair – and completely invisible to the human eye.”

Through the use of nanotechnology, the chemical composition of the surface of the yeast cells could be established by making a surgical incision into the surface. The cells could be peeled off in layers of approximately three (3) nanometres at a time to establish the effect of the oil on the yeast cell’s composition. A nanometre is one thousandth of a micrometre.

Each cell was enlarged by between 40 000 and 50 000 times. This was done by using the Department of Physics’ PHI700 Scanning Auger Nanoprobe linked to a Scanning Electron Microscope and Argon-etching. Under the guidance of Prof. Swart, Mss. Swart en Leeuw could dissect the surfaces of yeast cells exposed to over-used cooking oil. 

The study noted wart like outgrowths - some only a few nanometres in diameter – on the cell surfaces. Research concluded that these outgrowths were caused by the oil. The exposure to the oil also drastically hampered the growth of the yeast cells. (See figure 1)  

Researchers worldwide have warned about the over-usage of cooking oil for deep frying of food, as it can be linked to the cause of diseases like cancer. The over-usage of cooking oil in the preparation of food is therefore strictly regulated by laws worldwide.

The UFS-research doesn’t only show that over-used cooking oil is harmful to micro-organisms like yeast, but also suggests how nanotechnology can be used in biological and medical research on, amongst others, cancer cells.

 

Figure 1. Yeast cells exposed to over-used cooking oil. Wart like protuberances/ outgrowths (WP) is clearly visible on the surfaces of the elongated yeast cells. With the use of nanotechnology, it is possible to peel off the warts – some with a diameter of only a few nanometres – in layers only a few nanometres thick. At the same time, the 3D-structure of the warts as well as its chemical composition can be established.  

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za  
18 August 2010
 

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