Journal
MEAT SCIENCE
Volume 92, Issue 1, Pages 8-15Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2012.03.012
Keywords
Functional ingredients; Vegetable oils; Pork emulsion; TPA; Rheology; Scanning microscopy
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Funding
- Seneca Foundation (Consejeria de Educacion y Cultura. CC.AA. Murcia, Spain)
- Animal and Food Science Departments of the University of Kentucky
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Textural, rheological and microstructural properties of frankfurters made with 20% pork backfat, 20% canola or 20% canola-olive (3:1) oils, including rice bran (RB) and walnut extract (WE) as macronutrients (2.5%) were investigated. Textural parameters, including hardness, gumminess and rupture-force, were highly (P<0.05) influenced by the fat-oil composition. Addition of RB or WE in vegetable oil emulsions improved textural consistency (P<0.05). However, RB addition reduced gelling capacity, suggesting antagonistic interactions between fiber and oil droplets. Vegetable oil addition favored gel network formation, and, when combined with WE, showed the highest improvement of gel elasticity. These textural and gelling properties were corroborated by frankfurter micrographs, which revealed interactions between vegetable oils, RB, or WE with protein matrix and fat globules affecting these parameters. The results suggest that functional plant-derived ingredients can be valuable to the modification of frankfurter formulations for improved nutrition and as well as textural quality. (C) 2012 Elsevier Ltd. All rights reserved.
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