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| Estrada Godoy, Jesús. |
| Se ha tratado de encontrar el menor nivel de proteína cruda (PC) en dietas sorgo-pasta de soya adicionada con AA sintéticos que mantenga los resultados productivos de la dieta estándar; también se ha tratado de encontrar un aditivo capaz de mejorar la respuesta productiva de cerdos alimentados con dietas con baja proteína (DBP). Uno de estos aditivos podría ser el compuesto β-adrenérgico Ractopamina (RAC). Por ello, se realizó un experimento para evaluar el comportamiento productivo (ganancia diaria de peso, GDP; consumo de alimento, CAL; conversión alimenticia, CA; ganancia de carne magra, GCM), las características de la canal (área del músculo longissimus, AML; grasa dorsal, GD; porcentaje de carne magra, %CM) y la concentración de urea en plasma de 36... |
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Palavras-chave: Cerdos; Dietas con baja proteína; Ractopamina; Lisina; Concentración de urea en plasma; Pigs; Low-protein diets; Ractopamine; Lysine; Plasma urea nitrogen concentration. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/442 |
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| Estrada Godoy, Jesús. |
| Se ha tratado de encontrar el menor nivel de proteína cruda (PC) en dietas sorgo-pasta de soya adicionada con AA sintéticos que mantenga los resultados productivos de la dieta estándar; también se ha tratado de encontrar un aditivo capaz de mejorar la respuesta productiva de cerdos alimentados con dietas con baja proteína (DBP). Uno de estos aditivos podría ser el compuesto β-adrenérgico Ractopamina (RAC). Por ello, se realizó un experimento para evaluar el comportamiento productivo (ganancia diaria de peso, GDP; consumo de alimento, CAL; conversión alimenticia, CA; ganancia de carne magra, GCM), las características de la canal (área del músculo longissimus, AML; grasa dorsal, GD; porcentaje de carne magra, %CM) y la concentración de urea en plasma de 36... |
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Palavras-chave: Cerdos; Dietas con baja proteína; Ractopamina; Lisina; Concentración de urea en plasma; Pigs; Low-protein diets; Ractopamine; Lysine; Plasma urea nitrogen concentration. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/442 |
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| Asadi,H; Sadeghi,AA; Eila,N; Aminafshar,M. |
| ABSTRACT This study was conducted to evaluate the effects of coenzyme Q10, L-carnitine and ractopamine supplementation, alone and in combinations, on carcass traits and immune response of broiler chickens. Five hundred and twelve one-day-old Ross 308 male broiler chickens were randomly allocated into eight treatments with four replicates each. A 2×2×2 factorial arrangement was applied, with two levels of coenzyme Q10 (0 and 40 mg/kg), two levels of L-carnitine (0 and 200 mg/kg) and two levels of ractopamine (0 and 10 mg/kg). The birds were reared until day 42 of age under standard conditions. Blood samples were collected at the end of grower and finisher periods from the wing vein. Four birds per group were sacrificed at day 42 of age. Except for carcass... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coenzyme Q10; L-carnitine; Ractopamine; Broiler chicken. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400677 |
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| Romero Maya, Angel Martín. |
| Se realizó un estudio con el objetivo de evaluar el comportamiento productivo y características de la canal de ovinos Suffolk x Hampshire y Pelibuey al adicionar clorhidrato de ractopamina (RAC) en la dieta de corderos en la etapa de finalización. Se realizaron dos experimentos, en el primero se utilizaron 20 corderos machos Suffolk x Hampshire (S x H) con un peso inicial promedio de 37.01 ± 1.04 kg, y en el segundo 28 corderos machos Pelibuey (PB) con un peso inicial promedio 28.37 ± 0.66 kg. La prueba de engorda en corral fue de 45 días con un periodo de finalización de 30 días. Los corderos se alojaron en corraletas con comedero y bebedero individual, el alimento se ofreció a las 08:00 y 16:00 horas y el agua a libre acceso. El RAC se administró en la... |
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Palavras-chave: Ovinos; Ractopamine; Pelibuey; Suffolk x Hampshire; Lambs; Ganadería; Doctorado. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/600 |
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| COSTA E SILVA,Letícia Cristina; BARBOSA,Roger Darros; SILVEIRA,Expedito Tadeu Facco. |
| Abstract The effects of immunocastration and ractopamine in the diet on the belly quality were investigated from two crossbred pigs under different conditions of production, diet, management, and slaughter arranged in factorial design using two levels of addition of ractopamine in the diet, 0 and 7.5 ppm, and three genders (gilts, immunocastrated and barrows). The quality of bellies were analyzed for chemical composition, pH, meat and fat color, backfat thickness and fatty acid profile of the fat. The addition of ractopamine showed no significant influence on pH, color and chemical composition in two crossbred pigs. The immunocastrated had thicker belly backfat compared to the bellies of the gilts. The contents of fatty acids polyunsaturated, linoleic,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ractopamine; Immunocastration; Belly quality; Fatty acids. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000300404 |
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| Elmes,Claudia A; Bustamante,Ociel H; González,Fernando G; Larraín,Rafael E; Gandarillas,Mónica. |
| The aim of the study was to evaluate the effects of adding ractopamine (RAC) and amino acids (AA) to the diet on growth performance, carcass characteristics, commercial cuts yield, meat quality and residues in liver and muscle. Ninety-two crossbred castrated pigs (97.96 ± 2.32 kg) were randomly assigned to one of two dietary treatments: a Control diet with 0 mg kg-1 of RAC and a RAC+AA diet with 10 mg RAC kg-1, for the last 27 days. Pigs of RAC+AA group had greater average daily gain (ADG), gain to feed ratio (G:F) and final bodyweight (P≤0.05) and tended to have lower average daily feed intake (ADFI) (p=0.084) than Control pigs. Carcasses from RAC+AA animals were heavier than controls (P≤0.05). Dressing percentage and backfat depth... |
| Tipo: Journal article |
Palavras-chave: Carcass measurements; Finishing pigs; Meat cuts; Meat quality; Ractopamine; Residues. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300002 |
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| Lopes,Edna; Sousa,Raimundo Vicente de; Zangeronimo,Márcio Gilberto; Pereira,Andressa Naira de Jesus; Coelho,Mariana de Resende; Ferreira,Matheus Soares da Silva; Lima,Renato Ribeiro; Marcondes,Fernanda Klein; Napimoga,Marcelo Henrique; Pereira,Luciano José. |
| This study aimed at evaluating the effect of ractopamine (RAC) on metabolism, zootechnical performance, body composition, and behavior in Wistar rats submitted to acute and chronic restrain stress. The oral dose of 5 mg/kg of RAC was administered in periods of 0, 7, 14, 21, and 28 days. The elevated plus-maze test (EPMT) was used for behavioral assessment. Blood, carcass and viscera characteristics were evaluated. Insulin-dependent glucose transporters (GLUT-4) were semi-quantified by Western Blot in epididymal adipocytes. RAC periods associated with chronic stress increased the GLUT-4 protein expression in adipose tissue in a time-dependent manner (P=0.01), i.e., the longer the RAC addition period, the higher the GLUT-4 concentration in chronically... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β-adrenergic agonist; Ractopamine; Zootechnical performance; Metabolism; Elevated Plus-Maze Tests. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000300406 |
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