World's largest collection of chemistry and related science information. Search for substances, reactions, and patent and journal references. Note: Before using SciFinder for the first time you must REGISTER in order to create a personal user name and password using the instructions in the link.
This database merges patent information from Derwent World Patents Index with patent citation information from the Derwent Patents Citation Index. It is possible to further search through non-patent citation links to ISI's Web of Science. Includes access to the Derwent chemistry resource of chemical structure searching and the Thomson patent store.
An e-print service which presents papers in physics and related disciplines, mathematics, nonlinear science, computer science, and quantitative biology. ArXiv.org is a fully automated electronic archive and distribution server for research papers which functions as a means of communicating ongoing research information in these subject areas.