作者单位:Nanovis Inc, W Lafayette, IN 47907 USA[1]Purdue Univ, Dept Anim Sci, W Lafayette, IN 47907 USA[2]Purdue Univ, Dept Hlth & Kinesiol, W Lafayette, IN 47907 USA[3]Purdue Univ, Sch Nucl Engn, W Lafayette, IN 47907 USA[4]Purdue Univ, Dept Agr & Biol Engn, W Lafayette, IN 47907 USA[5]