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Humada M.J.,Research Center rmacion Agrarias Cifa | Sanudo C.,University of Zaragoza | Serrano E.,Research Center rmacion Agrarias Cifa
Meat Science | Year: 2014

The effects of production system (SE: pasture based vs. IN: concentrate based) and slaughter age (12 vs. 14. months) on chemical composition, vitamin E and myoglobin contents, lipid oxidation at 0, 3 and 6. days of display, colour and cooking losses at 2 and 7. days postmortem from thirty-three Tudanca calves were studied. SE animals showed lower IMF and greater vitamin E contents (1.2 vs. 2.9% and 4.1 vs. 1.8. μg/g, respectively). Thiobarbituric acid reactive substances (TBARS) increased (p≤ 0.001) with display time and was greater in the IN system. After 6. days display, IN animals presented twofold TBARS values (1.4 vs. 0.8. mg malonaldehyde/kg meat). At 7. days postmortem, SE groups presented greater (p≤ 0.05) L* and lower (p≤ 0.05) b* and H° than IN groups. Myoglobin increased with age (3.4 to 3.9. mg/g meat), but differences (p≤ 0.05) on a* and C* values were observed only between 12 and 14. months at 2. days postmortem. © 2013 Elsevier Ltd.


Humada M.J.,Research Center rmacion Agrarias Cifa | Serrano E.,Research Center rmacion Agrarias Cifa | Sanudo C.,University of Zaragoza | Rolland D.C.,Agriculture and Agri Food Canada | Dugan M.E.R.,Agriculture and Agri Food Canada
Meat Science | Year: 2012

Thirty-three young bulls from Tudanca local breed were used to investigate the effect of two production systems (semi-extensive vs. intensive) and two slaughter ages (12 vs. 14. months) on meat fatty acid (FA) composition. Longissimus thoracis from semi-extensive animals had a lower percentage of intramuscular fat (p≤ 0.001), saturated FAs (p≤ 0.05), trans-18:1 (p≤ 0.001), n-6/n-3 ratio (p≤ 0.001) and a higher percentage of branched chain FAs (p≤ 0.001), polyunsaturated FAs (p≤ 0.001) and conjugated linoleic acid (CLA) (p≤ 0.001). Few differences were observed in FA composition between slaughter ages. Hence, meat from semi-extensive animals slaughtered at 12 or 14. months displayed a healthier FA profile from a consumer's point of view. © 2011 Elsevier Ltd.


Soto S.,University of León | Soto S.,Autonomous University of the State of Hidalgo | Serrano E.,Research Center rmacion Agrarias Cifa | Humada M.J.,Research Center rmacion Agrarias Cifa | And 4 more authors.
Grasas y Aceites | Year: 2015

Grazing ruminants and their production systems have been associated with lower environmental impact and higher animal welfare, along with distinctive meat quality characteristics when compared to intensively reared animals. Recent studies have been aimed at finding compounds in ruminant meat and fat which could be used as tracers of herbage feeding. This study determined and compared the volatile composition of the perirenal fat from Tudanca-breed calves reared on semi-extensive (SE; n=8) or intensive (I; n=8) systems. The volatile compounds of perirenal fat were analyzed using simultaneous distillation-extraction and gas chromatography coupled with mass spectrometry (GC/MS) with the mass spectra detector operating in full scan mode. Terpenes were also determined using solid-phase micro-extraction and GC/MS operating in the selective ion monitoring mode. The SE system resulted in decreased levels of octanal, 2-octenal and 2,4-decadienal, and increased levels of 2,3-octanedione and skatole. The levels of α-pinene, aromadendrene, α-phellandrene, eucalyptol and α-gurjunene were higher for the SE system. Fenchene, eucalyptol and α-gurjunene have not been reported in previous studies on beef volatiles. The study showed the possibility of using several terpenes of perirenal fat as indicators of pasture-feeding in Tudanca calves. © 2015 CSIC.


The effects of production system (SE: pasture based vs. IN: concentrate based) and slaughter age (12 vs. 14 months) on chemical composition, vitamin E and myoglobin contents, lipid oxidation at 0, 3 and 6 days of display, colour and cooking losses at 2 and 7 days postmortem from thirty-three Tudanca calves were studied. SE animals showed lower IMF and greater vitamin E contents (1.2 vs. 2.9% and 4.1 vs. 1.8 g/g, respectively). Thiobarbituric acid reactive substances (TBARS) increased (p 0.001) with display time and was greater in the IN system. After 6 days display, IN animals presented twofold TBARS values (1.4 vs. 0.8 mg malonaldehyde/kg meat). At 7 days postmortem, SE groups presented greater (p 0.05) L* and lower (p 0.05) b* and H than IN groups. Myoglobin increased with age (3.4 to 3.9 mg/g meat), but differences (p 0.05) on a* and C* values were observed only between 12 and 14 months at 2 days postmortem.


PubMed | Research Center rmacion Agrarias Cifa
Type: Journal Article | Journal: Meat science | Year: 2011

Thirty-three young bulls from Tudanca local breed were used to investigate the effect of two production systems (semi-extensive vs. intensive) and two slaughter ages (12 vs. 14months) on meat fatty acid (FA) composition. Longissimus thoracis from semi-extensive animals had a lower percentage of intramuscular fat (p0.001), saturated FAs (p0.05), trans-18:1 (p0.001), n-6/n-3 ratio (p0.001) and a higher percentage of branched chain FAs (p0.001), polyunsaturated FAs (p0.001) and conjugated linoleic acid (CLA) (p0.001). Few differences were observed in FA composition between slaughter ages. Hence, meat from semi-extensive animals slaughtered at 12 or 14months displayed a healthier FA profile from a consumers point of view.

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