Efeitos de dois níveis de sulfato de cobre e cobre metionina no metabolismo e oxidação de lipídios em ovinos

Abstract

Antioxidantes 2. Colesterol 3. Enzimas 4. Minerais. I. Título. 12 months for study of oxidative stability. After that, steaks of m. longissimus were collected and exposed to "display life" (DL) (4°C) to study oxidative stability which was accompanied by TBARS values on days 0, 3 and 6. The copper supplementation resulted in higher concentration and accumulation of Cu in the liver (P<0.05), however, the concentration of Cu in muscle was not altered by supplementation (P>0.05). There was no significant effect (P>0.05) for fat thickness, serum triglycerides, total cholesterol, HDL and LDL between control and copper supplementation regardless of the source. The copper supplementation altered the fatty acid profile of the meat (P<0.05), with an increase in the proportion of lauric acid (C12: 0) in the control group compared with the other treatments (P<0.05). Copper supplementation reduced cholesterol concentration in m. longissimus (P<0.05) in supplemented lambs compared to the control group, this reduction was accompanied by reduction concentrations of GSH (P<0.05) and increasing of oxidized glutathione (GSSG) in the liver (P<0.05). There was no effect of Cu supplementation for TBARS in the liver however, there was significant effect on m. longissimus collected during sawing (P<0.10). There was no effect of Cu supplementation for TBARS in the m. longissimus exposed in the "Display Life after 12 months vacuum freezing (P>0.05), but there was a linear increase in TBARS values during this period. Cu supplementation increased the activity of SOD and GP-x (P<0.05) in the liver. These results suggest that copper can be used to improve meat quality without affecting the oxidative stability.

Efeitos de fontes orgânicas de cobre e enxofre sobre a interação cobre, molibdênio e enxofre na alimentação de ovinos

“…Os dados estão dentro da normalidade e de acordo com os apresentados por Garrine (2013) onde os ovinos apresentaram semelhança no peso de abate e rendimento de carcaça (41,82 0,51 kg e 49,53 0,70% respectivamente) independente dos tratamentos (doses e fontes de cobre).…”