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05 September 2018
Excellent start for Kovsies and Mamburu
Khomotso Mamburu (right on photo) has been the star for the Kovsies in their first two matches of the Varsity Netball Series.

The Kovsie netball team – Khomotso Mamburu in particular – has had an excellent start to Varsity Netball 2018. Mamburu, who plays goal defence and wing defence, became the first Kovsie player in the history of the series to bag two Player of the Match awards consecutively.

The Kovsies won both their opening matches with ease. Their big win over the defending champions, Tuks, by 68-43 in August, was the biggest defeat the Pretoria students have ever suffered in the competition. 

The Kovsie netball team, who are the two-time champions of 2013 and 2014, also earned a bonus-point victory in August when they drubbed the University of Johannesburg by 69-29. The Kovsies are now joint first on the log.

They faced the Vaal University of Technology in the Callie Human Centre this past Sunday, followed by a meeting against the University of the Western Cape on Monday afternoon.

Khomotso, an LLB Law student who was voted Player of the Varsity Series last year, has received three Player of the Match awards, which is just one less than the Kovsie record of four held by Karla Pretorius, playing for the team from 2013 to 2015. 

Meanwhile Karla, a postgraduate student, is making huge strides overseas. Her club, Sunshine Coast Lightning, won the Australian league for a second consecutive year on Sunday. She was named in the Team of the Tournament as goal defence. Karla finished the tournament with 50 incepts, which were the most in the tournament. 

News Archive

Prof Tredoux turns theories regarding the formation of metals on its head
2013-09-17

 

Prof Marian Tredoux
17 September 2013

The latest research conducted by Prof Marian Tredoux of the Department of Geology, in collaboration with her research assistant Bianca Kennedy and their colleagues in Germany, placed established theories regarding how minerals of the platinum-group of elements are formed, under close scrutiny.

The article on this research of which Prof Tredoux is a co-author – ‘Noble metal nanoclusters and nanoparticles precede mineral formation in magmatic sulphide melts’ – was published in Nature Communications on 6 September 2013. It is an online journal for research of the highest quality in the fields of biological, physical and chemical sciences.

This study found that atoms of platinum and arsenic create nanoclusters, long before the mineral sperrylite can crystallise. Thus, the platinum does not occur as a primary sulphur compound. The research was conducted at the Steinmann Institute of the University of Bonn, Germany, as well as here in Bloemfontein.

Monetary support from Inkaba yeAfrica – a German-South African multidisciplinary and intercultural Earth Science collaborative of the National Research Foundation (NRF) – made this research possible. Studies are now also being conducted on other metals in the precious metal group, specifically palladium, rhodium and ruthenium.

The discovery of the nanoclusters and the combination with arsenic can have far-reaching consequences for the platinum mine industry, if it can be utilised to recover a greater amount of platinum ore and therefore less wastage ending up in mine dumps. This will signify optimal mining of a scarce and valuable metal, one of South Africa’s most important export products.

For Prof Tredoux, the research results also prove thoughts she already had some twenty years ago around the forming of platinum minerals. “Researchers laughed in my face, but the evidence had to wait for the development of technology to prove it.” Young researchers were very excited at recent congresses about the findings, since the new models can bring new insights.

“Chemistry researchers have been talking about platinum element clusters in watery environments for quite a while, but it was thought that these would not appear in magmas (molten rock) due to the high temperatures (>1 000 degrees celsius).”

Prof Tredoux has already delivered lectures at congresses in Scotland, Hungary, Sweden and Italy on this research.

Read the article at: http://www.nature.com/ncomms/2013/130906/ncomms3405/full/ncomms3405.html

 

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