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One Of A Kind "Historic Scientists" Multi Signed (X3) Announcement For Sale
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One Of A Kind "Historic Scientists" Multi Signed (X3) Announcement: $279.99
Up for sale a RARE! "Historic Scientists" Multi Signed Announcement. Signers are; Lars Gunnar Sillen (Chemistry), John S Hall (Astronomy) and Chang-Yung Fan (Physics).
ES-4869E Bo Lars Gunnar Sillén, born July 11, 1916 in Stockholm, died July 23, 1970, was a Swedish chemist. Sillén defended her dissertation in 1940 in analytical chemistry at Stockholm University, and from 1950 was professor of inorganic chemistry at the Royal Institute of Technology. In his early career, he mostly worked with X-ray diffraction as a method of determining mineral phases, especially in the case of bismuth compounds. He then became an internationally known solution chemist. Several of his publications are considered standard works in geochemistry, and his work influenced other well-known geochemists such as Robert Garrels and Werner Stumm. Sillén was a pioneer, especially when it came to understanding the chemical composition of oceans. Previously, it was thought that the chemistry of seawater was determined by weathering from various minerals. Sillén was able to show that precipitation reactions were also significant, and his hypothesis was that the composition of seawater could be calculated from nine different equilibrium reactions. Furthermore, Sillén was very active in the compilation of thermodynamic data for equilibrium reactions, and in the 1960s was a pioneer in using computer calculations to process equilibrium data from various measurement sources. He also published textbooks. He also occasionally worked for FOA. Sillén was elected in 1964 as a member of both the Academy of Sciences and the Academy of Engineering Sciences.
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