Effects of different ageing techniques on beef quality

Kabir Adesina Taiwo

Diplomová práce

Abstract:

This study was carried out to evaluate the effect of different ageing techniques; wet ageing (WA), dry ageing (DA), and semi-permeable bag ageing (SBA) on the physical, chemical, and sensory qualities of beef. The meat samples were taken from the longissimus lumborum (LL) muscles region, from six adult Fleckvieh cattle steers of a final age average of 444 ± 14 days and slaughter weight average of 581.2 ± 30.43kg. The samples of meat were randomly divided into three ageing treatments (WA, SBA, and DA) which were then aged over 14 or 28 days period in a controlled chamber, at a temperature of 2°C and relative humidity of 80% and air exchange within the chamber being at 15% per hour. The WA technique produced meat with a brighter and lighter colour than the SBA and DA meat samples, and the lowest moisture losses during ageing was the DA meat samples followed by SBA and then WA. The WA had the highest cooking loss percentage in both ageing periods compared to the SBA and DA. The shear force (WSBF) of the meat shows no difference among the ageing methods, however, WSBF decreased as the ageing period increases across all the three ageing methods. Interestingly, SBA and DA meat recording highest juiciness score than the other ageing techniques at D14 and D28. The SBA treatment appears to be a suitable alternative for DA, decreasing moisture losses but improving sensory qualities of Fleckvieh beef. Furthermore, it is recommended that, more research should be conducted to evaluate the effects of microbial activities on the physical, chemical, and sensory attributes of Fleckvieh cattle meat under these ageing methods.

Keywords

Fleckvieh cattle, tenderness, juiciness, cooking loss, shear force, longissimus lumborum

Jazyk práce: angličtina

Datum vytvoření / odevzdání či podání práce: 1. 5. 2024

Obhajoba závěrečné práce

• Obhajoba proběhla 6. 6. 2024
• Vedoucí: doc. Tersia Needham, Ph.D.
• Oponent: Eva Kudrnáčová, Ph.D.

Česká zemědělská univerzita v Praze

Fakulta tropického zemědělství

Magisterský studijní program:
Tropical Farming Systems