Does ractopamine interact with immunological castration on pork lean and fat quantities?

Does ractopamine interact with immunological castration on pork lean and fat quantities?
A. Martins, R. Formighieri, D. S. Lucas, L. C. C. Silva, E. T. F. Silveira, S. R. Oliveira, J. C. C. Balieiro and P. E. de Felício