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Up for sale "X-Ray Pioneer" David Harker Hand Written Letter On 4X6 Card.
ES-4072E
David Harker (October 19, 1906
– February 27, 1991) was an American medical researcher who according to
the New York Times was
"a pioneer in the use of X-rays to decipher the structure of critical
substances in the life process of cells". He is also well known
for Harker–Kasper inequalities (statistical relationships between the phases
of structure factors), which
he devised in collaboration with John S. Kasper. Harker made seminal
discoveries in the field of chemical crystallography. His lab solved the
structure of the pancreatic enzyme ribonuclease A, the third protein structure ever solved by
protein crystallography. Harker was a member of the National Academy of
Sciences, director of the protein structure program at the Polytechnic Institute of
Brooklyn, director of the Center for Crystallographic Research
at Roswell Park Cancer Institute (RPCI),
and the head of the crystallography division of General Electric.[6] After retirement from RPCI in 1976, he Research Institute (HWI), then known as the Medical
Foundation of Buffalo. He remained there until his death in 1991. His research
interests while at HWI turned towards mathematical aspects of crystallography, including color space
groups and nfinite polyhedra. Harker was awarded
the Gregori Aminoff Prize from
the Swedish Academy in
1984.
