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http://dx.doi.org/10.5851/kosfa.2012.32.3.323

Evaluation of Rheological Properties of Pork Myofibrillar Protein with Tapioca Starch and its Utilization to the Pork Model Sausages  

Shon, Se-Ra (Department of Animal Science and Functional Foods Research Institute, Chonnam National University)
Chin, Koo-Bok (Department of Animal Science and Functional Foods Research Institute, Chonnam National University)
Publication Information
Food Science of Animal Resources / v.32, no.3, 2012 , pp. 323-329 More about this Journal
Abstract
In order to investigate the rheological properties of myofibrillar protein (MP) mixed with tapioca starch (TS; 0, 1, and 2%) at various salt concentrations (0.1, 0.3, and 0.45 M), viscosity, gel strength, differential scanning calorimeter (DSC) and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) were measured. Viscosity of MP increased with increasing salt concentrations (p<0.05), but not with the addition of TS. The addition of TS improved gel strength and cooking yield at all salt concentrations (p<0.05). DSC results demonstrated that the starting peak of TS gelation was observed at $55^{\circ}C$, however, no differences in peak were observed with various salt and TS levels (p>0.05). SDS-PAGE profile also showed no differences in protein bands for pork myofibrillar protein with various salt and TS levels. Based on the model study, pork model sausages with various levels of tapioca (0, 1, and 2%) and TG (1%) were manufactured. The pork model sausages with 2% TS increased pH and water holding capacity (p<0.05), while those with TGase (1%) increased most textural properties, regardless of the addition of TS. Thus, the combination of 1% TG with 2% TS improved the gel strength and water holding capacity in the meat products.
Keywords
rheological properties; tapioca starch; various salt concentrations; pork model sausages;
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