Prediction of the sensory texture of a yam thick paste (amala) using instrumental and physicochemical parameters

Akissoé Noël H., Mestres Christian, Hounhouigan Joseph D., Nago Mathurin Coffi. 2006. Prediction of the sensory texture of a yam thick paste (amala) using instrumental and physicochemical parameters. Journal of Texture Studies, 37 (4) : 393-412.

Résumé : Amala is a traditional thick paste consumed in West Africa (Nigeria, Bénin, Togo). It is prepared from blanched dried yam flour and has a particular texture. The texture attributes of amala pastes obtained from market and prepared in laboratory were sensorily evaluated. Both compression and extrusion tests were done from which maxima force and slope were calculated. The physical (particle size), starch characteristics and functional properties (solubility, swelling power [Sp], viscosity) of yam flours were also determined to establish a predictive model for amala sensory texture attributes. The main amala sensory attributes were stickiness, .firmness and smoothness. Stickiness and firmness could be assessed by uniaxial extrusion test: These attributes were highly correlated with the maximum extrusion slope (r = -0.60 and r = 0.53, respectively). Stickiness was associated with yam flour Sp, which in turn was related to gelatinization temperature and enthalpy changes. In addition, soluble matter and soluble amylose were found to be indicators of amala sensory stickiness. No clear relationships were observed between sensory firmness and yam flour physicochemical characteristics or functional properties.

Mots-clés Agrovoc : igname, propriété physicochimique, texture, propriétaire foncier, farine, fermeté

Mots-clés géographiques Agrovoc : Afrique occidentale

Mots-clés complémentaires : Pâte

Classification Agris : Q02 - Traitement et conservation des produits alimentaires

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Akissoé Noël H., UNB (BEN)
• Mestres Christian, CIRAD-CA-CALIM (BEN)
• Hounhouigan Joseph D., UNB (BEN)
• Nago Mathurin Coffi, UAC (BEN)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/533740/)

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