释义 |
ractopamine in British English (rækˈtəʊpəˌmiːn) nouna synthetic food additive used in some countries to promote rapid muscle growth in animals Examples of 'ractopamine' in a sentenceractopamine There was an average increase of 6.09% in the bonus index when ractopamine was used.Daily feed intake presented a linear reduction when the level of dietary ractopamine was increased.At relatively high concentrations, ractopamine exhibited more severe toxicity than clentuberol on nematodes.The β-adrenergic most used in beef cattle are ractopamine hydrochloride and zilpaterol hydrochloride.The treatments were composed of 0, 5, 10 and 20 ppm of ractopamine levels.Therefore, ractopamine was to be prohibited in any concentration.By increasing the dietary ractopamine concentration, the serum cortisol level was elevated.No differences were found among the doses of ractopamine utilized.Daily weight gain increased and feed conversion improved by adding ractopamine to the diets. |