assays
In the MES 23.5 cultures, DA and L-DOPA induce a dose- and       time-dependent cytotoxicity, as determined by tetrazolium salt and trypan blue       assays.
In the MES 23.5 cultures, DA and L-DOPA induce a dose- and       time-dependent cytotoxicity, as determined by tetrazolium salt and  @OBJECT$  @PREDICAT$  @SUBJECT$ .