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Radočaj Olga F.; Dimić Etelka B.; Vujasinović Vesna B. (2011)
Publisher: Faculty of Technology, Novi Sad
Journal: Acta Periodica Technologica
Languages: English
Types: Article
Subjects: Technology (General), hull-less pumpkin seed press-cake, instrumental texture profile analysis, optimization, response surface methodology, T1-995, fat-based spread
Hull-less pumpkin seed press-cake, a by-product of the pumpkin oil pressing process, was used to formulate a fat-based spread which resembled commercial peanut butter; both in the appearance and in texture. In this study, response surface methodology was used to investigate the effects of a commercial stabilizer and cold-pressed hemp oil added to the pumpkin seed press-cake, on the texture of the formulations using instrumental texture profile analysis. The responses were significantly affected by both variables tested in a central composite, two factorial experimental design on five levels. Strong and firm spreads, without visible oil separation were formed and had an appearance and texture comparable to commercial peanut butter. In terms of the primary food texture attributes such as hardness, cohesiveness and adhesiveness, determined by the instrumental texture analysis, the optimum combination of variables with 1-1.2% of added stabilizer and 20- 40% of added hemp oil (in the oil phase) produced desirable spreads.
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