Quality parameters and oxidative stability of lamb during ageing
The aim was to determine the quality parameters and oxidative stability of colour, lipids and proteins (formation of carbonyls) of vacuum packed lamb at a constant temperature of 2 °C ±1 °C up to 15 days post mortem. The suitability of lamb loin (longissimus lumborum) for ageing and optimal ageing p...
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Veröffentlicht in: | Meso 2020, Vol.22 (5), p.357-367 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The aim was to determine the quality parameters and oxidative stability of colour, lipids and proteins (formation of carbonyls) of vacuum packed lamb at a constant temperature of 2 °C ±1 °C up to 15 days post mortem. The suitability of lamb loin (longissimus lumborum) for ageing and optimal ageing period to obtain optimum sensory properties, especially tenderness and aroma was determined. A sample of 100 g lamb meat contains 23.48 g protein, 69.66 g water and 5.48 g fat. Lamb samples were the most tender after 11 days (both, sensory assessed and instrumentally measured – share force decreased by 61%) and had the best aroma after 15 days post mortem. In the meantime, the lamb became significantly brighter and more saturated (higher L*, a* and b* values), the content of secondary lipid oxidation products increased (1.7 times higher amount of malondialdehyde), and the content of protein carbonyls decreased to the initial value, despite an initial increase observed 11 days post mortem. We found that lamb loin is suitable piece for ageing; the optimal duration of ageing of loins is 15 days post mortem.
Cilj rada bio je odrediti značajke kvalitete i oksidacijsku stabilnost boje, lipida te bjelančevina (stvaranje karbonila) janjetine pakirane u vakuumu, starosti do 15 dana nakon klanja, pri stalnoj temperaturi od 2 °C ± 1 °C. Utvrđivana je primjerenost janjećeg filea (longissimus lumborum) za zrenje te optimalno vrijeme zrenja, a kojima se postižu najbolja senzorička svojstva, posebice mekoća i aroma. Uzorak od 100 g janjetine sadrži 23,48 g bjelančevina, 69,66 g vode i 5,48 g masti. Uzorci janjetine su bili najmekši 11 dana nakon klanja (senzorička procjena i mekoća utvrđena instrumentima – udio sile smanjen je za 61 %), pri čemu je najbolja aroma utvrđena 15 dana nakon klanja. Janjetina je starenjem postala značajno svjetlija i zasićenija (veće vrijednosti L*, a* i b*), povećao se sadržaj sekundarnih produkata oksidacije lipida (1,7 puta veća količina malondialdehida), dok se sadržaj proteinskih karbonila, po početnom povećanju zabilježenom 11 dana nakon klanja, smanjio na početnu vrijednost. U svrhu objektivnije procjene brzine oksidacije bjelančevina u janjetini, valja napomenuti da je sedmodnevno smrzavanje mesa prije analize značajno smanjilo sadržaj proteinskih karbonila (32 %). Utvrđeno je da je janjeći file primjeren za produženo zrenje, pri čemu optimalno trajanje zrenja filea iznosi 15 dana nakon klanja.
Das Ziel der Arbeit war es, die Qualitätsparamet |
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ISSN: | 1332-0025 1848-8323 |
DOI: | 10.31727/m.22.5.2 |