|(in 14th- and 15th-century England) a substantial landholder of free but not noble birth|
|[C13: from Anglo-French fraunclein, from Old French franc free, on the model of |
|1.||Aretha (əˈriːθə) born 1942, US soul, pop, and gospel singer|
|2.||Benjamin 1706--90, American statesman, scientist, and author. He helped draw up the Declaration of Independence (1776) and, as ambassador to France (1776--85), he negotiated an alliance with France and a peace settlement with Britain. As a scientist, he is noted particularly for his researches in electricity, esp his invention of the lightning conductor|
|3.||Sir John. 1786--1847, English explorer of the Arctic: lieutenant-governor of Van Diemen's Land (now Tasmania) (1836--43): died while on a voyage to discover the Northwest Passage|
|4.||Rosalind. 1920--58, British x-ray crystallographer. She contributed to the discovery of the structure of DNA, before her premature death from cancer|
Franklin Frank·lin (frāngk'lĭn), Rosalind. 1920-1958.
British biophysicist. Her x-ray diffraction studies of DNA led to the description of the full structure of DNA by James Watson and Francis Crick.
American public official, scientist, inventor, and writer who fully established the distinction between negative and positive electricity, proved that lightning and electricity are identical, and suggested that buildings could be protected by lightning conductors. He also invented bifocal glasses, established the direction of the prevailing storm track in North America and determined the existence of the Gulf Stream.
|Franklin, Rosalind Elsie 1920-1958. |
British x-ray crystallographer whose diffraction images, made by directing x-rays at DNA, provided crucial information that led to the discovery of its structure as a double helix by Francis Crick and James D. Watson.
Our Living Language : James D. Watson and Francis Crick's famous double helix model of the structure of DNA is rightly considered one of the greatest scientific discoveries ever made. While Watson and Crick became famous the world over, later sharing the Nobel Prize for physiology or medicine, the contributions of Rosalind Franklin are less well-known, even though her work was crucial to their discovery. Franklin's x-ray photograph depicting the double-helix shape of DNA gave Watson and Crick the essential experimental evidence they needed to determine DNA's structure. Born in London in 1920 to a wealthy Anglo-Jewish family, Franklin attended the University of Cambridge, where she earned a doctorate in physical chemistry. It was there that she learned x-ray crystallography, a process used to determine the structure of molecules by bombarding them with x-rays and analyzing the resultant diffraction patterns. Franklin later accepted a post at King's College London in 1951 to study DNA, thus entering the race to discover the molecule's structure. Without her knowledge, a close colleague at King's, Maurice Wilkins, showed her unpublished research to Watson and Crick, who were then able to establish DNA's configuration and soon after published their findings in the journal Nature. When Franklin saw the model produced by Watson and Crick, she accepted it immediately, as it fit with her experimental data. Franklin left King's in 1953 and continued a distinguished career, studying the structure of viruses. She died of ovarian cancer at 37, never knowing how her own work had contributed to their important discovery.