"X-Ray Pioneer" David Harker Hand Written Letter On 4X6 Card Todd Mueller COA

Description

Up for auction
"X-Ray Pioneer" David Harker Hand Written Letter On 4X6 Card.
This item is certified authentic by Todd Mueller Autographs and comes with their Certificate of Authenticity.
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 joined the
Hauptman-Woodward Medical 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.