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09 May 2023 | Story Leonie Bolleurs | Photo Supplied
Prof André Roodt
Prof Andreas Roodt was recently awarded the MT Steyn Prize for Natural Science and Technology Excellence from the SA Akademie vir Wetenskap en Kuns. He will receive the prize, sponsored by Sanlam, at a function scheduled for September this year.

Prof Andreas Roodt, former Head of the Department of Chemistry at the University of the Free State (UFS) and retired Distinguished Professor in the same department, was recently awarded the MT Steyn Prize for Natural Science and Technology Excellence from the SA Akademie vir Wetenskap en Kuns.

The prize, a major recognition of his life's work, was presented to him for his contribution to the exploration and sustained development of natural science and technology and the successful application thereof in broader society.

Impacting society

About receiving the prize, he says it was a big surprise, but he is very proud to be honoured with this special award, “being an Afrikaans kid from a ‘platteland’ school outside Bloemfontein.”

Prof Roodt’s research focuses on understanding the reaction mechanisms of mainly inorganic coordination chemical systems that are critical to different industrial, medical, environmental, and metal beneficiation processes.

His research, for instance, contributes to important compounds and processes relevant to nuclear medicine and potential cancer therapy. Not so long ago, he registered a patent on this in Europe, Japan, and the USA that could help to diagnose and potentially treat cancer-related tumours in the future.

In addition, he continues to work on several projects aimed at developing cleaner industrial processes in the South African petrochemical industry. He is also focusing on more efficient ways of accessing the country’s mineral resources.

Career highlights

Throughout his academic career, Prof Roodt has achieved many significant milestones. He was extensively involved in crystallography for more than 30 years. One of his career highlights was being elected as the President of the European Crystallographic Association from 2012 to 2015, an organisation with more than 35 member countries.

In this field, he established an X-ray crystallographic facility in the UFS Department of Chemistry, which was officially named the ‘Roodt XRD Lab’ at the end of 2021.

He also sees his journey with the diverse group of 41 PhD and 54 MSc students (Afrikaans, English, Sesotho, Setswana, and isiXhosa) as another notable achievement in his career.

Other outstanding moments in Prof Roodt's career were his collaborations with research leaders from countries such as the USA, UK, Switzerland, Italy, Sweden, France, Croatia, India, Japan, Russia, the Netherlands, Germany, and Tunisia. These collaborations have allowed him to be recognised by peers worldwide and have demonstrated that Africa and South Africa can produce high-quality and relevant research that can compete on an international level.

The future

Despite his appointment as a Distinguished Professor and his commitment to finishing uncompleted work and assisting younger colleagues both in South Africa and abroad, Prof Roodt retired more than a year ago. He is now enjoying his retirement with his wife, children, and grandchildren, while also devoting time to his passion for collecting aloe plants and generating new hybrids.

News Archive

Well-established root system important for sustainable production in semi-arid grasslands
2015-02-24

Plot layout where production and root studies were done
Photo: Supplied

The importance of a well-established root system for sustainable production in the semi-arid grasslands cannot be over-emphasised.

A study of Prof Hennie Snyman from the Department of Animal and Wildlife and Grassland Sciences at the University of the Free State is of the few studies in which soil-water instead of rainfall has been used to estimate above- and below-ground production of semi-arid grasslands. “In the past, plant ecological studies have concentrated largely on above-ground parts of the grassland ecosystem with less emphasis on root growth. This study is, therefore, one of the few done on root dynamics in drier areas,” said Prof Snyman.

The longevity of grass seeds in the soil seed bank is another aspect that is being investigated at present. This information could provide guidelines in grassland restoration.

“Understanding changes in the hydrological characteristics of grassland ecosystems with degradation is essential when making grassland management decisions in arid and semi-arid areas to ensure sustainable animal production. The impact of grassland degradation on productivity, root production, root/shoot ratios, and water-use efficiency has been quantified for the semi-arid grasslands over the last 35 years. Because of the great impact of sustainable management guidelines on land users, this study will be continuing for many years,” said Prof Snyman.

Water-use efficiency (WUE) is defined as the quantity of above- and/or below-ground plant produced over a given period of time per unit of water evapotranspired. Sampling is done from grassland artificially maintained in three different grassland conditions: good, moderate, and poor.

As much as 86, 89 and 94% of the roots for grasslands in good, moderate and poor conditions respectively occur at a depth of less than 300 mm. Root mass is strongly seasonal with the most active growth taking place during March and April. Root mass appears to be greater than above-ground production for these semi-arid areas, with an increase in roots in relation to above-ground production with grassland degradation. The mean monthly root/shoot ratios for grasslands in good, moderate, and poor conditions are 1.16, 1.11, and 1.37 respectively. Grassland degradation lowered above- and below-ground plant production significantly as well as water-use efficiency. The mean WUE (root production included) was 4.79, 3.54 and 2.47 kg ha -1 mm -1 for grasslands in good, moderate, and poor conditions respectively.

These water-use efficiency observations are among the few that also include root production in their calculations.

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