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Light lamb meat quality packed under modified atmospheres: effect of stunning systems (electrically v. gas)

Published online by Cambridge University Press:  02 September 2009

M. B. Linares  and
H. Vergara
M. B. Linares
Affiliation:
Departamento de Ciencia y Tecnología Agroforestal y Genética, Escuela Técnica Superior de Ingenieros Agrónomos, University of Castilla-La Mancha, Campus Universitario, 02071 Albacete, Spain Sección de Calidad Alimentaria, Instituto de Desarrollo Regional, University of Castilla-La Mancha, Campus Universitario, 02071 Albacete, Spain
H. Vergara*
Affiliation:
Departamento de Ciencia y Tecnología Agroforestal y Genética, Escuela Técnica Superior de Ingenieros Agrónomos, University of Castilla-La Mancha, Campus Universitario, 02071 Albacete, Spain Sección de Calidad Alimentaria, Instituto de Desarrollo Regional, University of Castilla-La Mancha, Campus Universitario, 02071 Albacete, Spain
*
†E-mail: [email protected]
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Abstract

In the present study, the effect of type of stunning (electrical v. gas) and the gas mixtures in a modified atmosphere (MA) packing system (MA-A: 30% CO2 + 70% O2; MA-B: 30% CO2 + 69.3% N2 + 0.7% CO; MA-C: 40% CO2 + 60% N2) on light lamb meat quality, obtained by 20 males of Manchego Spanish breed, was evaluated at 7, 14 and 21 days post packing. For all ageing times, gas-stunned groups reached the highest pH (P < 0.001) and shear force (SF) values (P < 0.05), and at 21 days, water losses were highest; in contrast, meat colour coordinates were lower (P < 0.001). In general, MA-B showed the highest stability for colour coordinates whereas the lowest tenderness (high SF) was found on MA-A. In this study, the gas mixture with a low carbon monoxide level (MA-B) promoted a higher colour stability and good tenderness, in comparison to the other two blends. In contrast, the conventional packaging system (type A, high oxygen levels) had a reduced tenderness and major colour instability.

Keywords

stunningmeatlight lambmodified atmospherecarbon monoxide
Type
Full Paper
Information
animal , Volume 3 , Issue 12 , December 2009 , pp. 1763 - 1771
Copyright
Copyright © The Animal Consortium 2009

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