| Random Term |
surfactant |
| a compound that stabilizes an emulsion by acting at the surface between two immiscible substances |
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| February 4 in chemistry |
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 1896 - Friedrich Hund born: Hund's rules for electron configurations, the first of which predicts maximum multiplicity of spin; molecular-orbital theory (Hund-Mulliken approach). |
| 1902 - Thomas A. Edison was issued a U.S. patent for a "Reversible Galvanic Battery", a design for a permanent battery with a large capacity per unit of weight. Finely divided cadmium is used as the oxidizable element. An oxide of nickel or cobalt is used as the depolarizer, mixed with a flake-like conducting substance such as graphite. According the patent, "the oxid of nickel or cobalt is raised to a superperoxid condition when charged. In discharging the nickel or cobalt oxid will be reduced to a lower state of oxidation, while the metallic cadmium will be oxidized." The active materials are packed under pressure in perforations of a conducting plate. The nickel oxide is preferred as less costly and less soluble in the alkaline electrolyte. |
| 1915 - Joseph Goldberger begins the experiment that demonstrates that pellagra is a dietary disease. |
| 1936 - John Jacob Livingood made radium (Bi - 210) by bombarding common bismuth with deuterons, the first synthetis of a radioactive substance in the US. |
sources: http://webserver.lemoyne.edu/faculty/giunta/week.html, http://todayinsci.com
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