Full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).
A database provided by the Chemical Abstracts Service (CAS), full of chemical and bibliographic information that covers many scientific and biomedical fields, with an emphasis on chemistry.
Scopus is a large abstract and citation database of peer-reviewed literature: scientific journals, books and conference proceedings. Delivering a comprehensive overview of the world's research output in the fields of science, technology, medicine, social sciences, and arts and humanities, Scopus features smart tools to track, analyze and visualize research.
To learn more about logging into Scopus, see this guide.