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a tool for predicting outcomes in cancer patients based on characteristics of the patient and of the tumor. It is produced by the Laboratory of Quantitative Medicine of Massachusetts General Hospital.
Genetics Home Reference
links to the National Library of Medicine's Web site for consumer information about genetic conditions and the genes or chromosomes responsible for those conditions
NIST Reference on Constants, Units, and Uncertainty
under the auspices of the National Institute of Standards and Technology (NIST), the site addresses three topics: fundamental physical constants like the molar gas constant and the first and second radiation constants, the International System of Units, and the uncertainty of measurement results
Tracks and discusses major retractions in the published scientific literature.
searches over 45 databases and over 2,000 selected Websites from 14 federal agencies, providing authoritative U.S. government science information
The NIST Data Gateway
provides easy access to over 80 of the NIST scientific and technical databases. These databases cover a broad range of scientific disciplines
WebElements Periodic Table
an interactive periodic table of elements that includes descriptions of each element, atomic weight, photographs