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General Science and Chemistry

Periodic Table of Elements A very professional look at all the elements. Tons of very accurate data.
Classic Papers from the History of Chemistry Here you can read papers by Avogadro, Br?sted, Bohr, Planck and many others.
Enzyme Manual from Worthington In depth descriptions of nature's catalysts.
The Online-Macromolecular Museum A nice collection of structure of macromolecules (DNA, proteins), Requires plug-ins.
 
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