immunochemistry

concentration, focus

to concentrate, to focus on

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

chemistry (branch of natural science)

a piece of research, a study, investigation

to research, to study

(immunology) immunity / habituation