Before revision:  The reversible binding kinetics are assumed to follow the standard model for linear springs \mbox{%DIFAUXCMD Dembo1988 that large floc aggregates are possible with more tensile ligands due to efficient inter-floc collisions ( measured via the collision factor).
After revision:  The reversible binding kinetics are assumed to follow the standard model for linear springs \mbox{%DIFAUXCMD Dembo1988 that large floc aggregates are possible with more tensile ligands due to efficient inter-floc collisions ( or a large, non-zero collision factor).