The initial concentrations of these constituents in the broth and {HEAD ~ the order} of mixing {TAIL ~ these chemicals} are important 
of mixing
The initial concentrations of these constituents in the broth and { HEAD ~ the order } of mixing { TAIL ~ these chemicals } are important
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH