Sentence:  Treatment of all the sera with sweet clover proteins greatly reduced nonspecific fluorescence , especially when the treated <WSD>conjugate</WSD> was diluted to 1 : 2 with 0.85 % saline . 
Meaning of the word marked with <WSD> tags:  a mixture of two partially miscible liquids A and B produces two conjugate solutions: one of A in B and another of B in A