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Stegmann Gallery hosts Sam Nhlengethwa collection in virtual exhibition

19 August 2020 | Story Rulanzen Martin | Photo Supplied

Art in itself is a journey of self-exploration; with a global pandemic raging, art lovers can now explore this journey virtually. The Johannes Stegmann Gallery at the University of the Free State (UFS) is happy to announce the (second) virtual exhibition of Leeto: a Sam Nhlengethwa Print Retrospective until 4 September 2020.

Sam Nhlengethwa, Tribute to Lemmy 'Special' Mabaso, 2002, Seven colour lithograph, 76 x 106 cm,
^{Artwork courtesy of the artist and the Goodman Gallery.}

The exhibition features a collection of Sam Nhlengethwa’s print work to be interrogated, his artistic evolution to be mapped out, and his personal aesthetics to be interpreted, while surveying this renowned artist’s print work from 1978 to 2018. The underlying theme of the exhibition is jazz, an early influence in Nhlengethwa’s works from the underground jazz community of the townships. His brother was a jazz musician and he started collecting jazz records from the early age of 17.

Leeto is a Setswana/Sesotho word for ‘journey’ and, as the word suggests, the exhibition explores the ongoing artistic footsteps of the artist. The collection was curated by Boitumelo Tlhoaele, a doctoral fellow in the Africa Open Institute for Music, Research, and Innovation at Stellenbosch University.

^{Dedicated to Victor Ndlazilwana, 1994, Colour lithograph, 40 x 60 cm}
^{Artwork courtesy of the artist and the Goodman Gallery.}

About the artist:

Nhlengethwa began his career in 1976 during one of South Africa’s most tumultuous socio-political eras. In 1978, he completed a two-year diploma at the Evangelical Lutheran Church Art and Craft Centre, Rorke’s Drift, KwaZulu-Natal, where printmaking was a prominent feature of the centre’s activities. Nhlengethwa’s work spans a variety of mediums, from painting, drawing to collage, and some of his works have been translated into tapestries. One of his big cityscape works was translated into a mosaic. In addition to all the afore-mentioned mediums, Nhlengethwa also produced an impressive and sizeable body of printmaking works.

He has collaborated with several South African printmaking studios, such as The Artists’ Press, Artist Proof Studio, David Krut Print Workshop, LL Editions Fine Art Lithography Studio, MK and Artist Print Workshop, Mo Editions Printmaking Studio, and Sguzu Printmaker’s Workshop. Since 1994, he has produced 163 prints in collaboration with The Artists’ Press, making it his longest and most productive affiliation.

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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