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Hair sheep lamb meat ageing a sensory odour and taste analysis

Albarracín, William H.; Sánchez, Iván CB.; Restrepo, Luz (2016)

Background: Flavor is defined as being the result of stimulating two senses simultaneously: odour and taste and this usually consists of human evaluation. This sensory parameter is affected by different animal conditions ...
Hair sheep lamb meat ageing a sensory texture analysis

Albarracín, William H.; Sánchez, Iván CB.; Restrepo, Luz (2016)

Background: Texture is a variety of sensations given by hardness and softness related to mastication, cut and penetration which are related to water holding capacity, pH, connective tissue and muscle fibers state. Objective: ...
Hair sheep lamb meat ageing an instrumental texture analysi

Albarracín, William H.; Sánchez, Iván CB.; Villegas, Camilo (2016)

Background: The shortening produced during rigor-mortis is an important meat problem due to variation in ageing conditions as a consequence of isometric tension induced by storage conditions which could be improved by ...
Hair sheep lamb meat ageing-a sensory color analysis

Albarracín, William H.; Sánchez, Iván CB.; Restrepo, Luz (2016)

Antecedentes: el color de la carne puede modificarse por factores fisiológicos o de proceso, como especies, género, cantidad de fibras musculares, características genéticas y edad, produciendo diferencias que el consumidor ...
Hair sheep lamb meat ageing-an instrumental color analysis

Albarracín, William H.; Sánchez, Iván CB.; Villegas, Camilo (2016)

Background: The color of meat may be modified by physiological or process factors such as species, gender, the amount of muscle fibers, genetic characteristics and age, producing differences that can be observe by the ...
Hair sheep lamb meat ageing-an instrumental odour analysis

Albarracín, William H.; Sánchez, Iván CB.; Villegas, Camilo (2016)

Background: The electronic nose is a system of sensors which is far from a real nose’s sensitivity, it is a device based on chemical, biological and electro chemical responses from the compounds present in food products ...

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Hair sheep lamb meat ageing a sensory odour and taste analysis
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Albarracín, William H. | 2016

Background: Flavor is defined as being the result of stimulating two senses simultaneously: odour and taste and this usually consists of human evaluation. This sensory parameter is affected by different animal conditions including animal breeds, animal production and in some cases the slaughter process. Objective: The aim of this work was to evaluate the effect of feeding system and ageing times on odour sensory response. Materials: Fiftyfour 10-week-old Dorper X Colombian lambs were used in 2 feeding systems: grazing and semi-feedlot (n=27). Samples were analyzed in 3 ageing conditions (0, 7 and 15 days). Meat samples were cooked in a preheated oven at 170°C until reaching an internal 72°C temperature. These were then cut into 2cm square cubes and evaluated by trained sensory panel. Results Obtained results shown that booth feeding systems do not affect the odour response, but in taste analysis is important to take in account that sensory response shown worst acceptation in semi-feedlot system in special at 15 ageing days. Conclusions: The grazing or semi-feedlot systems did not affect the sensory panel response in odour evaluation, which implies that this parameter does not generate influence in sensory responses, contrary to taste in which case semi-feedlot could influence costumer’s acceptance.

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Hair sheep lamb meat ageing a sensory texture analysis
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Albarracín, William H. | 2016

Background: Texture is a variety of sensations given by hardness and softness related to mastication, cut and penetration which are related to water holding capacity, pH, connective tissue and muscle fibers state. Objective: The aim of this work was to evaluate the effect of feeding system, fasting period and ageing times on sensory texture response. Methods: Fifty-four 10-week-old Dorper X Colombian lambs were used in 2 feeding systems: grazing and semi-feedlot (n=27). Samples were analyzed in 3 ageing conditions (0, 7 and 15 days). Each feeding group was divided into 3 fasting groups (6, 12 and 18 hours) prior to slaughter. Meat samples were cooked in a preheated oven at 170°C until reaching an internal 72°C temperature. These were then cut into 2cm square cubes and covered in aluminum foil again being evaluated by trained sensory panel. Results: The obtained results showed that lamb meat analyzed exhibits a tender texture that depends on ageing that was significant at 7 days of ageing; later times showed worst sensorial scores. Conclusions: The trend in the texture of lamb generates an undesirable change in the valuations of this parameter, which is affected by the preferences of the panelists who consider soft lamb meat as a defect.

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Hair sheep lamb meat ageing an instrumental texture analysi
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Albarracín, William H. | 2016

Background: The shortening produced during rigor-mortis is an important meat problem due to variation in ageing conditions as a consequence of isometric tension induced by storage conditions which could be improved by processing conditions. Texture is a variety of sensations given by hardness and softness related to mastication, cut and penetration which are related to water holding capacity, pH, connective tissue and muscle fibers state. Objective: The aim of this work was to evaluate the effect of feeding system, fasting period and ageing times on instrumental texture behavior. Methods: Fiftyfour 10-week-old Dorper X Colombian lambs were used in 2 feeding systems: grazing and semi-feedlot (n=27). Samples were analyzed in 3 ageing conditions (0, 7 and 15 days). Each feeding group was divided into 3 fasting groups (6, 12 and 18 hours) prior to slaughter. Meat samples were cooked in a preheated oven at 170°C until reaching an internal 72°C temperature. Samples were subjected to Warner Bratzler shear force and texture profile analysis (TPA). Results: Warner Bratzler results shown that the feeding system and time of ageing were the factors that presented statistical differences. Similar results were obtained from TPA analysis describing that both feeding system and ageing time played a significant role on almost every TPA parameters. Conclusion: Grazing and semi feedlot feeding systems have an important influence in lamb meat texture behavior parameters being grazing system which offer a best instrumental texture meat quality, if this quality means softer meat.

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Hair sheep lamb meat ageing-a sensory color analysis
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Albarracín, William H. | 2016

Antecedentes: el color de la carne puede modificarse por factores fisiológicos o de proceso, como especies, género, cantidad de fibras musculares, características genéticas y edad, produciendo diferencias que el consumidor puede observar. Objetivo: Este trabajo tuvo como objetivo evaluar el efecto de un sistema de alimentación en el análisis sensorial de color para corderos de ovejas de pelo cruzados con razas colombianas en respuesta al análisis sensorial Métodos: Se utilizaron 54 corderos colombianos Dorper X de 10 semanas de edad en 2 sistemas de alimentación. : pastoreo y semi-feedlot (n = 27). Las muestras se analizaron en 3 condiciones de envejecimiento (0, 7 y 15 días). El panel de análisis sensorial evaluó el atributo de color de las muestras de carne cruda en comparación con una escala de Pantone normalizada como su tabla de colores guía. Resultados: Los resultados mostraron que la respuesta de tri-estímulo dada por los miembros del panel usando la escala Pantone puede ser comparable con los valores obtenidos instrumentalmente que también estaban relacionados con la interpretación del valor ΔE con respecto al grado de ser "notable" o "ligero". Conclusiones: La respuesta de tri-estímulo dada por los miembros del panel usando la escala de Pantone puede tener una tendencia comparable a los valores obtenidos instrumentalmente y relacionados con la interpretación del valor de Delta E con respecto al grado de ser "notable" o "ligero", lo que implica que el tiempo de envejecimiento y la alimentación El sistema puede afectar la respuesta sensorial del color. © 2016, Universidad de Antioquia. Todos los derechos reservados. La respuesta de tri-estímulo dada por los miembros del panel que usan la escala Pantone puede tener una tendencia comparable a los valores obtenidos instrumentalmente y relacionados con la interpretación del valor de Delta E con respecto al grado de ser "notable" o "ligero", lo que implica que el tiempo de envejecimiento y el sistema de alimentación pueden afectar la respuesta sensorial del color. © 2016, Universidad de Antioquia. Todos los derechos reservados. La respuesta de tri-estímulo dada por los miembros del panel que usan la escala Pantone puede tener una tendencia comparable a los valores obtenidos instrumentalmente y relacionados con la interpretación del valor de Delta E con respecto al grado de ser "notable" o "ligero", lo que implica que el tiempo de envejecimiento y el sistema de alimentación pueden afectar la respuesta sensorial del color.

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Hair sheep lamb meat ageing-an instrumental color analysis
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Albarracín, William H. | 2016

Background: The color of meat may be modified by physiological or process factors such as species, gender, the amount of muscle fibers, genetic characteristics and age, producing differences that can be observe by the consumer. Objectives: This work was aimed at evaluating the effect of a feeding system in instrumental Color parameters for hair sheep lambs crossed with Colombian breeds Methods: Fifty-four 10-week-old Dorper X Colombian lambs were used in 2 feeding systems: grazing and semi-feedlot (n=27); each feeding group was divided into 3 fasting groups (6, 12 and 18 hours) prior to slaughter. Samples were analyzed in 3 ageing conditions (0, 7 and 15 days), using L*, a* and b* color values obtained by instrumental evaluation. Results: There were only significant differences between the feeding systems at days 7 ageing (p<0.05). Instrumental L* values increased with ageing. Conclusions: Ageing time and feeding system affect the color results in the studied lambs, this differences implies that this variables should be had in account in order to obtain lamb meat quality.

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Hair sheep lamb meat ageing-an instrumental odour analysis
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Albarracín, William H. | 2016

Background: The electronic nose is a system of sensors which is far from a real nose’s sensitivity, it is a device based on chemical, biological and electro chemical responses from the compounds present in food products known as the aromatic footprint which might discriminate different food states. Objective: The aim of this work was to evaluate the effect of feeding system and ageing times in meat samples taken from Doper X Colombian lambs by electronic nose analysis Methods: Fiftyfour 10-week-old Dorper X Colombian lambs were used in 2 feeding systems: grazing and semifeedlot (n=27). Samples were analyzed in 3 ageing conditions (0, 7 and 15 days). 10 g of sample was weighed, vacuum-packed and cooked until reaching 72°C internal temperature and stored at 4°C. The samples were placed in 40 mL vials closed with 22 mm PTFE-silicone septa to start the analysis and then placed at 16°C for 10 minutes. Afterwards, they were incubated at 35.5°C for 20 minutes, a 100 mL/min flow was selected to avoid presenting low responses in the sensors. 40°C was established to prevent water condensate formation that could have interfered in the sensors’ response. Results: The obtained results showed that discrimination was possible between PC1 with 90.6% and PC2 with 72.6% (data variability) in feeding systems with 88.89% (correct discriminating function) due to the volatile compounds forming the aromatic profile of cooked lamb meat, especially sulphur aromatic ones. Conclusions: A greater number of sensors were necessary for discriminating between different ageing times on account of the multiple aroma-producing reactions.

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