When Leonard Hayflick began his cell culture work at the Wistar Institute in the 1950s, the field was facing a nagging problem. Culture flasks were so big, that microscope objective lenses couldn't ...
The earliest surgical microscopes in the operating room. Brinell-Leitz monocular microscope used by Carl Olof Nyle?n (left), the modified Brinell microscope (center) and Zeiss binocular microscope ...
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