Sentence:  In the <WSD>present</WSD> work whole sera have been fractionated by chromatography on DEAE-cellulose using single gradients similar to those described by Sober and Peterson , and certain chemical and serological properties of the fractions containing antibodies of the ABO and Rh systems have been described . 
Meaning of the word marked with <WSD> tags:  temporal sense; intermediate between past and future; now existing or happening or in consideration