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20 February 2024 | Story Lacea Loader | Photo SUPPLIED
Prof Bob Frater
The late Prof Robert Frater, after whom the Robert WM Frater Cardiovascular Research Centre at the UFS was named.

The Robert WM Frater Cardiovascular Research Centre (the Frater Centre) at the University of the Free State (UFS) received the sad news of the passing of Prof Robert (Bob) Frater at the age of 95 on 29 January 2024 in New York. 

“Prof Frater was and will continue to be regarded as an international icon in heart surgery, especially in mitral valve repair where he described the use of artificial chordae, which is still the international standard today.  Since 2006, he has been intimately involved in the establishment of the research programme in the Department of Cardiothoracic Surgery at the UFS, which culminated in the establishment of the Frater Centre in 2015. This would not have been possible without the combined efforts of the UFS and the generous financial support by Glycar – a Pretoria-based company established by Prof Frater,” says Prof Francis Smit, Director of the Robert WM Frater Cardiovascular Research Centre and Head of the Department of Cardiothoracic Surgery at the UFS.

Prof Frater was born in Cape Town and attended Bishops Diocesan College from 1937 to 1946. He excelled at school, both academically and as a sportsman. He was a prefect, captained the tennis team, and played first team rugby. He studied medicine at the University of Cape Town (UCT), achieving a first class in Surgery. He qualified as a cardiothoracic surgeon at the Mayo Clinic and after a stint back in Cape Town, spent the rest of his illustrious career at the Einstein and Montefiore university hospitals in New York. Despite this distance, Prof Frater always maintained and cherished his South African roots, palpably demonstrated by his notable collection of Africana books and art.

“He was an inspiring mentor and educator, and constructively influenced generations of cardiothoracic surgeons trained at the UFS and internationally. His enthusiasm for scientific research and deep understanding of heart valves and tissue engineering have largely determined the research focus of the Frater Centre to this day.  He received an honorary doctorate in Medicine from the UFS in 2011 in recognition of his immense contributions to cardiothoracic surgery during his lifetime. Apart from his international recognition and awards, the other outstanding award he received and cherished in South Africa, was the Robert Gray Medal from his old school, Bishops Diocesan College,” says Prof Smit.

At the UFS, he was Prof Smit’s promotor for his PhD on human heart valve transplants (homografts) and inspired an additional five PhD studies (four of which addressed tissue engineering, and one in re-designing a poppet mechanical heart valve, which was named the Frater valve).  Studies on heart valve mechanics and hydrodynamics conducted at the Frater Centre in support of these valve developments resulted in three cum laude Master of Engineering degrees awarded by Stellenbosch University.  Over time, the Robert WM Frater Cardiovascular Research Centre’s research output steadily increased in scope and quality, mainly due to the values of curiosity, excellence, integrated interdisciplinary collaborative teams, integrity, and mutual respect instilled by Prof Bob Frater.

“Prof Frater was always received ostentatiously in Bloemfontein. The registrars crowded around him, our research team was inspired, wisdom was gained from his vast experience in surgery and research, and no-one was left untouched by the deep humanity of this remarkable man. He was truly an exceptional individual, and a memorable South African.”

We wish to express our sincerest condolences and deepest sympathy to his wife Eileen, sons Hugh, Dirk, and the rest of the family,” says Prof Smit.

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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