Determination of the South American snake-necked turtle Hydromedusa tectifera Cope, 1869 (Testudines: Chelidae) plasma protein concentrations by refractometry and the biuret method - Schmidt, Elizabeth Moreira dos Santos [UNESP]; Lange, Rogerio Ribas; Hoppe, E. G. L.; Paulillo, Antonio Carlos (My University, 2009)