Robert Feulgen
Joachim Wilhelm Robert Feulgen ( 2 September 1884 – 24 October 1955 ) was a German physician and chemist who , in 1914 , developed a method for staining DNA ( now known as the Feulgen stain ) and who also discovered plant and animal nuclear DNA ( "thymonucleic acid" ) congeniality . 
<triplet> Robert Feulgen <subj> 2 September 1884 <obj> date of birth <subj> 24 October 1955 <obj> date of death <triplet> DNA <subj> nuclear <obj> part of <triplet> DNA <subj> nuclear <obj> part of