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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

Government supports the UFS's transformation push
2009-09-04

The Minister of Higher Education and Training, Dr Blade Nzimande (pictured), has lauded the University of the Free State (UFS) for the progress it has made in increasing access for black students.

However, the minister also acknowledged that the UFS has failed in some respects to make important changes.

“The continued racial segregation of the hostels is something that is unacceptable 15 years after the introduction of a democratic order and has no doubt contributed to the kinds of attitudes that led to the notorious incident at the Reitz Hostel last year,” he said.

Dr Nzimande was delivering the JN Boshoff Commemorative Lecture on the Main Campus in Bloemfontein last night.

He said the Rector and Vice-Chancellor of the UFS, Prof Jonathan Jansen, has assured him that he will speed up this issue of residence integration and that he was confident he will do so successfully with the support of the overwhelming majority of the university community.

“He has my support in his new role and he will succeed in taking the university forward decisively along the path towards greater academic excellence and to serving its students and staff, the Free State province and South Africa as a whole, including its poorest and most disadvantaged citizens,” he said.

He said the UFS is an important national asset and “not an asset for some to the exclusion of others”.

“We will play our part as the Department of Higher Education and Training to support you in pursuing transformation, but we won’t keep quiet when we see that there are things that are developing that are actually undermining the realization of the UFS as a national asset,” he said.

Despite the fact that all our universities, he said, have policies in place to combat racism and discrimination, the Soudien Report shows that there is a disconnection between policy and actual discriminatory practice at universities.

“This is a serious problem because this disjuncture is not only because of the actions of maverick individuals on the ground, but includes the universities’ leadership, including even University Councils which are guilty of making policy in order to comply with legislation but expect that policy to be ignored in practice,” he said.

The Soudien Report is a Report of the Ministerial Committee on Transformation and Social Cohesion and the Elimination of Discrimination in Public Higher Education Institutions commissioned by the Department of Education last year.

Dr Nzimande also raised the fact that universities have neglected the Further Education and Training (FET) college sector in terms of research and teaching.

“There is not enough research by the universities on the FET college sector and yet this is the sector that we are prioritizing to absorb many of our young people who can’t make it to universities,” he said.

“We want to try and fight against this notion that in order to proceed in life university is the only place. We want to turn these FET colleges into colleges of choice and universities must help us, not only to research them but also to train FET colleges lecturers.”

He also announced that he will be calling a meeting of all the chairpersons of the Institutional Forums of the universities later this month as he feels that the role and status of these forums have been “eroded”.

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt.stg@ufs.ac.za  
04 September 2009
 

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