Does the LFIR-LHCN correlation hold for low LFIR isolated galaxies?
  Low $L_{FIR}$ Isolated Galaxies (IGs) from the AMIGA sample have low level of
Star Formation (SF) activity. We observed the HCN(1-0) emission in a sample of
IGs in order to test whether they follow the tight relation between $L_{HCN}$
and $L_{FIR}$ found for galaxies with more active SF.
