the electron microscope allowed scientists to see the surface.
the electron microscope allowed scientists to see the surface.
what did the electron microscope allow scientists to see?
the surface
while david was still serving in the air force, prof. aharon katzir from the weizmann institute of science in rehovot, asked david to rebuild the institute's electron microscope which had been damaged while researchers tried to activate it. for a few months, david was working as a military doctor during the day and at the weizmann institute of science at night. in 1955, upon his completion of military service, he began working in the department of polymers of the weizmann institute. in addition to restoring the function of the electron microscope, he developed and prepared the microtome and other devices necessary for the operation of the electron microscope. later he founded the electron microscopy laboratory at the weizmann institute. his pearly research in the institute's electron microscopy laboratory involved the membrane structure of erythrocytes, their adherence and thrombocytes. in 1957, while working at the weizmann institute david danon founded with dr. kalman the department of physiology and anatomy of animals, at the faculty of agriculture in rehovot where he taught until 1962. his research during this period continued to focus on erythrocytes and thrombocytes, as well as the interaction between these cells and the influenza virus. in 1964 he was appointed head of the section for biological ultrastructure at the weizmann institute. in 1967 he was assigned the title of "professor of biology." prof. danon was the founder and first president of the israeli society for electron microscopy and president of the israeli society of hematology and blood transfusion. at this time he developed and built fragiligraph, – a device that enables automatic registration of osmotic fragility curve of erythrocytes, later produced by "elron".
david danon
in the following year, 1933, ruska built the first electron microscope that exceeded the resolution attainable with an optical (light) microscope. four years later, in 1937, siemens financed the work of ernst ruska and bodo von borries, and employed helmut ruska, ernst's brother, to develop applications for the microscope, especially with biological specimens. also in 1937, manfred von ardenne pioneered the scanning electron microscope. siemens produced the first commercial electron microscope in 1938. the first north american electron microscope was constructed in 1938, at the university of toronto, by eli franklin burton and students cecil hall, james hillier, and albert prebus. siemens produced a transmission electron microscope (tem) in 1939. although current transmission electron microscopes are capable of two million-power magnification, as scientific instruments, they remain based upon ruska’s prototype.
electron microscope