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21 January 2020 | Story Leonie Bolleurs | Photo Leonie Bolleurs
Prof Danie Vermeulen, Prof Arno Hugo, and master’s student in Consumer Sciences, Mandisa Masuku in the newly renovated sensory laboratory in the Agricultural Building on the UFS Bloemfontein Campus.
Prof Danie Vermeulen, Prof Arno Hugo, and master’s student in Consumer Sciences, Mandisa Masuku in the newly renovated sensory laboratory in the Agricultural Building on the UFS Bloemfontein Campus.

Imagine all food tasting the same …

Fortunately, this is not the case, as consumers like to enjoy what they eat. Tasting food is important because it enables suppliers to adapt food products to consumers’ preferences.

According to Prof Arno Hugo of the Department of Microbial, Biochemical and Food Biotechnology at the University of the Free State (UFS), it is important for food companies to make sure that new food products are acceptable to consumers before launching such products. Often, companies also want to confidentially compare and profile their new or even established products against their competitors’ products. Lately, food companies also have the need to adapt European or North American food products for the local consumer (Africanisation of food products). Independent sensory laboratories are needed for such work. 

Dr Carina Bothma, Senior Lecturer and sensory science expert – also from the Department of Microbial, Biochemical and Food Biotechnology – who manages the sensory laboratory, says the laboratory at the university performs sensory analysis, which is a scientific discipline used to evoke reactions from humans regarding the five senses of sight, smell, touch, taste, and hearing. These reactions can be captured from first bite to complete mastication and are then statistically analysed and interpreted by a sensory analyst.

With the support of the Dean of the Faculty of Natural and Agricultural Sciences, Prof Danie Vermeulen, a project to the value of R3 million to upgrade the existing sensory laboratory in the Agricultural Building on the UFS Bloemfontein Campus, is nearing completion. Minor improvements will be completed by June 2020.

According to Dr Bothma, upgrades were done in three sections, including a training area (with seating for 12 trained panellists); a computerised 12-booth tasting area (with a three-light communication system); and a preparation area. The latter consists of a walk-in fridge and walk-in freezer, a 10-rack industrial steam-jet oven, a ventilation system to control and maintain a negative pressure in the preparation area – so that odours do not move to the tasting area, two mobile units with four gas plates in each unit, and a sputum and control area equipped with a computer.

Prof Hugo, who is mainly responsible for planning trials and statistical analyses of sensory data, says the sensory laboratory is truly a fantastic facility and big asset for the university. “I think it is one of the best-planned and best-equipped sensory laboratories in South Africa.”

Alternative food products profiled

He continues: “Several sensory studies have been done regarding the influence of salt reduction on the meat quality of various meat products, as well as the effect of different feed supplements on meat quality. Meat was also evaluated, comparing the meat quality of animals from different production systems.”

Dr Bothma states that food products to be evaluated vary and may include new products in product development. “Several interesting food products have been tested in the lab so far. Underutilised vegetables such as amaranth and cactus pears, and newly introduced crops such as edamame, have been evaluated.  Ancient grains such as fonio have also been profiled.  An African staple, amagwinya, is currently being profiled, as well as food products containing insect flour,” she says.

Testing and teaching

According to Dr Bothma, a trained panel consisting of 10 to 12 panellists is highly trained to verbally describe a food product or characteristic.  For other tests, consumers of a specific food product to be tested, are sourced. Such a panel can consist of between 75 and 300 persons, depending on the requirements of the client.  Panels can also be compiled according to specific demographics. All demographic information remains anonymous.  

Sensory analysis forms part of academic research projects and a number of PhD and master’s degrees have been done in the laboratory. 

She says: “Postgraduate students work in the sensory lab under supervision of the sensory analyst. They personally recruit panellists on the campus, referred to as 'convenience sampling'. These assistants do the preparation for the tasting, preparing up to 500 individual samples for a test that has 100 panellists and five products.  They attend to the panellists, serve the samples, collect and decode ballot sheets, and enter data into Excel for statistical analysis.”

More than 20 accredited scientific articles have already been published from research done in this laboratory.

News Archive

An education system based on hope is what South Africa needs – Dr Beryl Botman
2016-05-26

Description: Hope revised Tags: Hope revised

Dr Beryl Botman, a postdoctoral research
fellow at the IRSJ, with Dr Willy Nel research associate
at the IRSJ and lecturer at the UFS
Faculty of Education.

HOPE is tangible and concrete construct that should be rooted in the learning and training of teachers,” said Dr Beryl Botman, a postdoctoral research fellow at the Institute for Reconciliation and Social Justice (IRSJ).

She presented her research paper Educators, praxis, and hope: A philosophical analysis of post-apartheid teacher education policy, based on the theoretical ideologies of Paulo Freire’s Pedagogy of the Oppressed. She explores ways in which oppression has been justified, and how it has been overcome through a mutual process between the oppressor and the oppressed, drawing on Paolo Freire’s theories and practices. The presentation was held at the University of the Free State’s (UFS) Faculty of Education, on the Bloemfontein campus on 13 May 2016.

From oppression to hope

Hope should be an educational construct for teacher education in South Africa. Dr Botman asserts that epistemology and ontology should be inseparable, as they are pivotal to an education system that is transformational.

The recent country-wide student protests and demonstrations are an indicant that education institutions need to seek understanding of mechanisms that fuel social conflict. Dr Botman claims that vast social inequalities make the process of democratisation difficult thus hindering transformation. She states that a critical consciousness is important for all South Africans, but more so for educators; it can be used as a tool to understanding the mechanisms of social conflict.

“Self-reflection and self-critique is vital for educators, we need to understand that we do not have all the answers because we ever-evolving beings, working on understanding ourselves and the people around us,” said Dr Botman.

The notion of hope
“I am a farmer. I have no hope for a future that is different from today. This quotation comes from Paulo Freire’s work," said Dr Botman. She said that the South African context and environment is similar. She said that people cannot live for today; one should live for tomorrow if hope is to manifest itself.

South African education environment needs to adopt a progressive consciousness that is future orientated, “You need to be hopeful, if you are radical. You need to be able to envision a new society and a new world,” said Dr Botman.

“You cannot only denounce the present, you need to also announce your hopes for a new society. South Africa needs education systems built on understanding. Although change is difficult, it is necessary for transformation,” Dr Botman added.

What makes hope educational?
“Hope is a vision for a tomorrow that is different, and vital for a transformative education system. To get out of a state of despair, people need to educate their hope. Lately, the issue of white privilege has been brought to the fore. You need to educate your hope, so that you understand the reality of others but, more importantly, of yourself,” said Dr Botman.

Dr Botma added that teacher education needs to adopt a Freirean pedagogy with a strong philosophy based on hope. The agency of teachers can either be hopeful or without hope. It is vital that education promotes hope.

“Teachers need to rely on their existential experience, the experiences of others, and the experiences of the children or students they teach. An understanding of all these experience reinforces the idea that people are life-long learners, always learning and adapting to society’s needs,” said Dr Botman.

Teachers as agents of hope

Dr Botman stated that current South African education policy is directed towards transformation but it does not stipulate means to achieve this objective. Further, she argues that educators need to put greater emphasis on self-knowledge, self-reflection, and self-education. Connecting with teachers, parents, students and the community engages with their self-knowledge and reflection.

Reorientation of teacher education
Dr Botman concluded by mentioning that rethinking ontological and epistemological aspects of education is important, and should be a pivotal point of teacher education. A renewed vision of hope-orientated philosophy and pedagogy needs to be adopted by the education institutions. A praxis, which is an informed action, when a balance between theory and practice is achieved. There is a need for an inclusive exploration of education philosophies and education systems not only European and Western but also African and Eastern as well.

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