Percorrer por autor "Santos, Gladston Rafael de Arruda"
A mostrar 1 - 2 de 2
Resultados por página
Opções de ordenação
- Allometric growth of ½ Dorper + ½ Santa Inês lambs slaughtered with different subcutaneous fat thicknessesPublication . Santos, Camilo Azevedo; Macedo, Francisco de Assis Fonseca de; Santos, Gladston Rafael de Arruda; Santos, Anselmo Domingos Ferreira; Melo, Maria Julia Araujo Feitosa; Passetti, Ludmila Couto Gomes; Teixeira, Alfredo; Mora, Natália Holtz Alves PedrosoThe objective of this work was to evaluate the allometric growth, the correlation of the cuts with the half carcasses, and the muscularity index of the leg of ½ Dorper + ½ Santa Inês lambs slaughtered with 2.0, 3.0, and 4.0 mm of subcutaneous fat thickness (SFT). Twenty-four non-castrated male lambs were used, being distributed according to their weight into three collective pens. Slaughtering occurred as the lambs reached the SFT predetermined by ultrasound. The half carcasses were weighed, dissected, and separated into five cuts: neck, shoulders, rib, loin, and leg. These cuts were dissected and weighed into muscle, subcutaneous fat, intermuscular fat, and bone. In the shoulders, lambs with 2.0 and 4.0 mm SFT showed early growth. In the rib, this early precocity was observed in lambs with 4.0 mm SFT. The leg showed isogonic growth in lambs with 3.0 and 4.0 mm SFT and was the cut that best correlated with the half carcass, regardless of the SFT. The slaughter of ½ Dorper + ½ Santa Inês lambs with 4.0 mm of subcutaneous fat allows obtaining a better allometric growth of the shoulder, rib, and leg cuts, as well as a better leg muscularity index.
- Physicochemical characteristics of dry aged beef from younger Nellore bulls slaughtered at different body weightsPublication . Passetti, Rodrigo Augusto Cortêz; Prado, Ivanor Nunes do; Macedo, Francisco de Assis Fonseca de; Teixeira, Alfredo; Cardoso, Claudia Andréa Lima; Santos, Gladston Rafael de Arruda; Santos, Camilo AzevedoReducing slaughter age can improve meat quality and reduce costs, while an ageing process can result in more standardized products. Thus, the objective of this paper was to measure the physicochemical characteristics of dry aged meat from younger Nellore bulls slaughtered at different body weights. Twenty-four Longissimus thoracis from young bulls (14 months of age) finished in a feedlot at body weights of 350, 400 and 450 kg were used. Fromeach group (N = 8), samples were divided into three portions for 0, 14 and 28 days of dry ageing. After the samples reached their dry aged period weight, pH and colour were measured. Next, water losses, shear force, the chemical composition and the fatty acids profile of the meat were measured. Reducing slaughter weight (350 kg) of young bulls did not affect meat tenderness but increased saturated fatty acids contents at day 1 of dry ageing. During the dry ageing process, drip loss increased, but thawing losses were reduced. Colour parameter was reduced by dry ageing and meat becomes darker, but meat tenderness was increased. Dry ageing increased the ash content. Dry ageing increased saturated fatty acid and reduced the monounsaturated and saturated fatty acid ratio (MUFA/SFA), but did not change the polyunsaturated fatty acids. Nellore young bulls (14 months) can be slaughtered with 400 or 450 kg without compromising physicochemical characteristics, while dry ageing improved meat tenderness but increased saturated fatty acids and changed meat colour.