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07 August 2024 | Story André Damons | Photo André Damons
Dr Alba du Toit
Dr Alba du Toit, Senior Lecturer in the Department of Sustainable Food Systems and Development, is leading the newly established Innovative ARC-DALLRD-UFS Agro-processing for Climate-smart Food System research chair at the UFS.

The Innovative Agro-processing for Climate-smart Food System research chair, one of four ARC-DALLRD-UFS research chairs recently established at the University of the Free State (UFS), will focus on innovative agro-processing technologies that could affect food and nutrition security. The chair’s work will also focus on improving food systems that can impact socioeconomic development.

In a concerted effort to address the challenges and effects of climate change in Southern Africa, the UFS, together with the Agricultural Research Council (ARC) and the Department of Agriculture, Land Reform and Rural Development (DALRRD), established four new research chairs within the Faculty of Natural and Agricultural Sciences (NAS).

The other research chairs are Climate Change and Agriculture, Agriculture Risk Financing and Sustainable Livestock Production and together with the Innovative Agro-processing for Climate-smart Food System research chair, and fall under the umbrella of climate change. They will also be part of the centre of excellence of the ARC and DALRRD on Climate Smart Agriculture.

Dr Alba du Toit, Senior Lecturer in the Department of Sustainable Food Systems and Development, will lead the Innovative Agro-processing for Climate-smart Food System research chair and says the chair allows researchers to dedicate their time and effort towards research. It consolidates expertise, resources, and facilities to strengthen the research team’s capacity and will have a strong foundation for sustainable development goals. The chair provides a hub for collaboration between the UFS, ARC and DALLRD to focus on regionally engaged research with maximum societal impact.

The chair, which officially started on 1 July, also allows researchers to do trans- and multi-disciplinary, relevant and cutting-edge research.

Nixtamalisation could transform the food system

“We believe that nixtamalisation could transform the food system. However, the consumer’s willingness to adopt and embrace new products and techniques is dependent on the success of the initiative.

“Thus, innovations in new product development must be consumer-led since the consumer is constantly evolving, making it imperative to understand consumer behaviour and motivations behind decision-making,” says Dr Du Toit.

The nixtamalisation process, she explains, is a multistep technique commonly employed in Mexico, Central America and the southern regions of the US to transform maize into food products. The nixtamalisation process alters the physicochemical, nutritional and sensory properties of maize products by increasing protein quality, improving the content of calcium, magnesium and potassium and reducing mycotoxin levels.”

According to Dr Du Toit, by using the principles of circular food design, they will develop products that could provide solutions and support the food system. It involves using processing technologies that could be applied and implemented by anyone with access to a basic kitchen.

“This would benefit rural farmers and communities, small-scale and emerging farmers to provide food for themselves and become economically active small business owners. We believed the right product could not only influence the food security and well-being of individual households but also stimulate entrepreneurial action, which could benefit the community and overcome barriers to make nixtamalisation an acceptable practice for all,” says Dr Du Toit.

Maize and sorghum

“Maize and sorghum are staple crops in South Africa that are not being utilised to their full potential. South Africa is well known for its maize production, and it is the staple for most of the population in the form of pap. However, the reliance on pap exaggerates the issues of food and nutrition insecurity because pap cooked from Super Maize Meal is deficient in nutrients and often consumed in isolation without diversification in the diet.

“Sorghum is another cereal crop that is climate-smart, drought-resistant and suited in South Africa’s arid and semi-arid areas, while it offers good nutritional value. However, most consumers are not familiar with the crop except for its application as an instant porridge.  Nixtamalisation is a process that could benefit consumers as maize and sorghum could be transformed into nutritious, safe meals directly from the farm to the fork,” explains Dr Du Toit.

Home-grown dried whole maize kernels, she continues, could be converted into safe and delicious meals in homes using basic equipment as it is widely and effectively done in Mexico by rural women. The research will determine if consumers would accept the process of nixtamalisation, whether the products would be acceptable, and if the nutritional value would be comparable to commercial products.

Some of the news consumer-acceptable products already developed, include maize chips, dehydrated phutu pap, and corndogs. Currently, the team is working on maize-milk, maize-milk frozen dessert and a custard tart. Maize products have the advantage of being lactose- and gluten-free and thus would appeal to consumers of plant-based products.

Societal impact

Dr Du Toit says she is excited about the societal impact this project will have on communities and the country and is hopeful that they will be able to influence policymakers and the industry to provide more nutritious staples that could be “game-changers” for the sake of society. She is looking forward to collaborating with DALRRD, the ARC and the grain industry to ensure that partnerships are strengthened and new opportunities are created for the staff and students.

Prof Wilna Oldewage-Theron, a Professor of Nutrition in the College of Human Sciences at Texas Tech University, will join the research chair next year as the co-leader. She has experience in community nutrition research in Africa, and her research interests include the factors contributing to household food insecurity and malnutrition in resource-poor communities. She will be focused on the nutritional benefits of soy for human health.

Prof Maryke Labuschagne, who is leading the NRF SARChI Chair in Diseases and Quality of Field Crops and who is passionate about impacting malnutrition, has been appointed as mentor for the chair.

News Archive

Harvard couple to present lectures on Biostatistics and Mathematics at the UFS
2015-12-07


Professor Donald Rubin

Prof Donald Rubin (John L. Loeb Professor of Statistics at Harvard University) and Elizabeth Zell (MStat - mathematical statistician in the Division of Bacterial Diseases) will visit the University of the Free State (UFS) where they will present lectures on their respective work.

Over his prestigious academic career, Prof Don Rubin’s 400 publications and 13 books have earned him around 180 000 citations at an h-index of 113. He is one of the most cited statisticians/mathematicians/economists/psychologists in the world over the last 10 -15 years. He has supervised 35 PhD candidates as sole-supervisor, 17 more as co-supervisor, with a further eight in the pipeline.

Prof Rubin who will meet with UFS academics in the Department of Mathematics and Actuarial Sciences will also deliver a lecture: Rerandomisation to improve covariate balance in experiments.

Randomised experiments are the “gold standard” for estimating causal effects, yet in practice, chance imbalances often exist in covariate distributions between treatment groups. If covariate data are available before units are exposed to treatments, these chance imbalances can be mitigated by first checking covariate balance before the physical experiment takes place. Provided a precise definition of imbalance has been specified in advance, unbalanced randomisations can be discarded, followed by a rerandomisation. This process can continue until a randomisation yielding balance according to the definition is achieved. By improving covariate balance, rerandomisation provides more precise and trustworthy estimates of treatment effects.

Prof Rubin received an honorary professorship from the Faculty of Natural and Agricultural Sciences at the UFS.


Elizabeth Zell

The lecture will take place on:
Date: Tuesday 8 December 2015
Time: 16:00
Venue: Albert Wessels Auditorium, Bloemfontein Campus

Zell earned her Master’s degree in Statistics at North Carolina State University, and for more than two decades, was an active bio-statistical researcher in various offices of the Centers for Disease Control (CDC). Since 2013, she has been the Principal Statistician and President of Stat-Epi Associates, Inc. Her 150+ publications have earned her 14 500 citations at an h-index of over 50. She is a Fellow of the American Statistical Association, and, in 2010, she received the Statistics Section Government Award for outstanding contributions to statistics and public health by the American Public Health Association. During her career at the CDC, she earned more than 20 CDC research awards and honours.

She will deliver two lectures at the UFS. The first is entitled A Potential Outcomes Approach to Documenting the Public Health Impact of the Introduction of PCV13 for the Prevention of Invasive Pneumococcal Disease. The topic of her second lecture is: Assessing the Effectiveness of Intrapartum Antibiotic Prophylaxis for Prevention of Early-Onset Group B Streptococcus Disease through Propensity Score Design

Elizabeth’s lectures will take place on:
Date: Wednesday 9 December 2015
Time: 10:45 and 13:00
Venue: West Block 111, Bloemfontein Campus

For more information, please contact Dr Michael von Maltitz at VMaltitzMJ@ufs.ac.za.

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