Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
11 June 2021 | Story Rulanzen Martin | Photo Supplied
Prof Joy Owen believes in the mutual intellectual push between research supervisor and student.

Prof Joy Owen, Head of the Department of Anthropology, and two of her students, Ingrid Juries, PhD student and Mamokoena Mokoena, Master’s student, presented a paper exploring the experiences of migrants, at the virtual Oxford Migration Conference that took place from 10 to 11 May 2021 under the theme Borders and Justice.

According to Prof Owen, their paper Bordering on complexity? African migrants’ narratives of boundary creation and dissolution, “tries to make a particular intervention in the transnational migration literature – inclusive of diasporic and refugee studies – which speaks to the complexity of reception in ‘host’ countries”.   Their paper and presentation were included in Routed, a special conference magazine. 

The mainstream portrayal of migrants and residents is that of one-sided aversion and sometimes violence, which gives rise to xenophobic attacks. However, the work done by Prof Owen, Mokoena, and Juries illustrates the ‘rather messy experiences’ of both migrants and citizens and the interpersonal relationships that may result from it.  “These relationships are not merely riddled with negative experiences, but also positive, life-affirming experiences for both migrant and citizen,” says Prof Owen.

 

Xenophobia in South Africa

South Africa in particular, has seen a rise in xenophobic attacks and xenophobia in general, which begs the questions – do we need more research on the matter? Prof Owen says no. “There’s vast literature on xenophobia, and more recently xenophilia – ‘the love of the other’. We need more research that demonstrates the ways in which non-citizens have become part of the South African socio-economic and political fabric,” says Prof Owen.


The complexities of our history in South Africa, that of migration and settlement. “How we narrate those stories, and what we focus on, confirms how we define ourselves as contemporary South Africans, inclusive of migrants in our midst,” says Prof Owen.

 

Mutual intellectual push

For Prof Owen, it is important to reiterate that although Juries and Mokoena are under her supervision, they were also her collaborators for the conference presentation. “Their contemporary knowledge and understanding of the intricate and embattled experiences of migrants in South Africa is growing,” she says. It is a privilege for her to witness the fast, immediate intellectual growth of her students and their academic prowess while being pushed intellectually herself. “That is fundamentally the role of education, is it not? To keep pushing beyond the knowledge we have accrued in service to society,” Prof Owen says. 


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
 

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