Sentence:  When 1 ml of conjugate was passed through a column ( * * f ) , the first and second milliliter fractions collected were the most specific and gave no nonspecific staining in some experiments , and very <WSD>little</WSD> in others . 
Meaning of the word marked with <WSD> tags:  (quantifier used with mass nouns) small in quantity or degree; not much or almost none or (with `a') at least some