Rare “X-Ray Pioneer" David Harker Hand Written Letter On 4X6 Card For Sale

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Rare “X-Ray Pioneer" David Harker Hand Written Letter On 4X6 Card:
$279.99

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. 

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