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