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24 August 2018 Photo Igno van Niekerk
Chemistry changing the world to create a better future
These practical applications of Chemistry are part of the relevant and practically applicable research Prof André Roodt (far left) and his research group are involved in. With him are Dr Ebrahiem Botha, Post-doctoral fellow; Pheelo Nkoe, PhD student; Shaun Redgard, MSc student; and Dr Orbett Alexander, Post-doctoral fellow

Some people have a gift for explaining the most complex concepts in a way anyone could understand. Combine this gift with passion, energy, and enthusiasm, and you are close to describing a meeting with Prof André Roodt

Prof Roodt not only teaches Chemistry, he lives it. He has published more than 320 papers, lectured internationally more than 100 times, and has guided 35 PhD and 48 MSc students to complete their degrees. These figures are likely to conjure up visions of a dusty academic working on pie-in-the-sky theories. 

Adding value

Within minutes you are made aware of the fact that Chemistry is not only a subject confined to classrooms and labs. It is a means of changing the world through research to create a better future. In academic terms, Prof Roodt and his team are involved in ‘Homegeneous Catalysis’, ‘Radiopharmacy: Theranostics’, ‘Metal Benefication’, and ‘Conversion of carbon dioxide and water’. And just when you start to remember how terrifying high-school Chemistry was, Prof Roodt explains the practical nature of what they are doing.

Few of us are aware of the exact processes that produce fuel for our cars, although we probably know that these processes have side effects which are usually detrimental to the environment; but what if the by-products of these processes can be turned into speciality chemicals which could add value in different ways?

Ever wondered how medication know where to go in your body? Well – just imagine highly specialised (clever) pharmaceutical agents giving off their own ‘light’, knowing exactly where to go, showing you where they are going, and knowing what to do in order to provide information and interact with specific cells in your body to assist in healing cells and fighting disease. Exciting.

Passionate people

But, as they say in the ads, that is not all; imagine better ways to generate power, using the natural processes in plants to increase natural oxygen where needed, and to be able to change oxygen levels in the environment.

These practical applications of Chemistry are part of the relevant and practically applicable research Prof Roodt and his research group are involved in.

When you leave Prof Roodt’s office, you realise that this is what the UFS is all about: Global impact. World-class research. Passionate people. And seizing the opportunity to create the future.

News Archive

UFS study shows playing time in Super Rugby matches decreasing
2016-12-19

Description: Super Rugby playing time Tags: Super Rugby playing time 

The study by Riaan Schoeman, (left), Prof Robert Schall,
and Prof Derik Coetzee from the University of the Free State
on variables in Super Rugby can provide coaches with
insight on how to approach the game.
Photo: Anja Aucamp

It is better for Super Rugby teams not to have the ball, which also leads to reduced overall playing time in matches.

This observation is from a study by the University of the Free State on the difference between winning and losing teams. Statistics between 2011 and 2015 show that Super Rugby winning teams kick more and their defence is better.

These statistics were applied by Riaan Schoeman, lecturer in Exercise and Sport Sciences, Prof Derik Coetzee, Head of Department: Exercise and Sport Sciences, and Prof Robert Schall, Department of Mathematics and Actuarial Sciences. The purpose of the study, Changes in match variables for winning and losing teams in Super Rugby from 2011 to 2015, was to observe changes. Data on 30 games (four from each team) per season, supplied by the Cheetahs via Verusco TryMaker Pro, were used.

About two minutes less action
“We found that the playing time has decreased. This is the time the ball is in play during 80 minutes,” says Schoeman. In 2011, the average playing time was 34.12 minutes and in 2015 it was 31.95.

“The winning team has less possession of the ball and doesn’t want it. They play more conservatively. They dominate with kicks and then they play,” says Prof Coetzee, who was the conditioning coach for the Springboks in 2007 when they won the World Cup.

Lineouts also more about kicking
As a result, the number of line-outs also increased (from 0.31 per minute in 2011 to 0.34 in 2015) and the winning teams are better in this regard.

“The winning team has less possession of the ball
and doesn’t want it. They play a more conservative
game. They dominate with kicks and then they play.”

Schoeman believes that rule changes could also have contributed to reduced playing time, since something like scrum work nowadays causes more problems. “When a scrum falls, the time thereafter is not playing time.”

According to Prof Coetzee, rucks and mauls have also increased, (rucks from 2.08 per minute in 2011 to 2.16 in 2015 and mauls from 0.07 per minute in 2011 to 0.10 in 2015). “The teams that win, dominate these areas,” he says.

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