Details

Autor(en) / Beteiligte

• Miller, Danika K.
• Acevedo, Nuria C.
• Lonergan, Steven M.
• Sebranek, Joseph G.
• Tarté, Rodrigo

Titel

Rheological characteristics of mechanically separated chicken and chicken breast trim myofibril solutions during thermal gelation

Ist Teil von

• Food chemistry, 2020-03, Vol.307, p.125557-125557, Article 125557

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2020

Quelle

MEDLINE

Beschreibungen/Notizen

• •Myofibrils from CBT and both types of MSC exhibited gelation in the range of 50 to 55 °C.•Higher peak G′ and G″ in CBT than both MSCs indicates formation of stronger elastic gel network.•Fiber type differences were observed between all three materials.•Greater protein fragmentation was observed in MSC than in CBT. Mechanically separated chicken (MSC) was obtained by two different separation methods (MSC1, Beehive separator, 3–5 d-old bones; MSC2, Poss separator, fresh bones) and compared to chicken breast trim (CBT). Rheological attributes of myofibrillar protein solutions during thermal gelation and cooling were evaluated. All sources exhibited gelation with increased temperature (decreased δ). In all three treatments, a peak, decline, and subsequent increase in both the G′ and G″ was observed in the 50–55 °C range, with peak values being higher for CBT than for both MSCs. G′ slopes on both sides of the peak (S2, S3) and following the decline (S4) were significantly different between CBT and both MSCs (P < 0.05) and indicated greater instability of the solid-like structure in the temperature range of 50–55 °C (myosin rod denaturation). Myofibrillar protein profiles confirmed fiber type differences among materials, as well as greater myosin fragmentation or modification in the MSC samples.