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• Business: Chemicals  (5,408)
• Science: Technology: Materials  (414)

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• BlueObelisk - Project to develop resources for chemistry based around the concepts of open data, open standards and open source. Members list, details of activities, mailing list, news, and publications.
• Chemical Forums - Discussion boards for all areas of chemistry, at levels ranging from high school to graduate school and practicing chemists. Site also includes web directory, periodic table, articles, and reference tables.
• CHEMINFO: Chemical Information Sources from Indiana University - Site designed to help people find and learn how to use chemical information resources on the Internet and elsewhere. Email discussion list available.
• Molecule of the Day - Weblog explains the relationship between chemistry and real life to non+chemists.
• The Periodic Table of Videos + University of Nottingham - Short streaming videos about most every element on the periodic table.
• Sci.Chem FAQ - A fairly comprehensive list of frequently asked questions and answers about chemistry and related topics.