Link: ScienceDirect

About: ScienceDirect covers authoritative titles from the core scientific literature, including high-impact factor titles such as THE LANCET, Cell, and Tetrahedron. More than 2,500 journals and more than nine million full-text articles are available in ScienceDirect. Full text.

Dates of Coverage: varies.

Truncation: [*]. (To use truncation, enter the root of a search term and replace the ending with a truncation symbol. The search engine will then find all forms of that word. For example, type comput* to find the words computer or computing).

Wildcard: [?]. (The wildcard helps when the spelling of a word is incomplete. To use the wildcard, enter your search terms and replace each unknown character with the appropriate wildcard symbol. The search engine finds all citations of that word with the symbol replaced by a letter. For example, type ne?t to find all citations containing neat, nest or next).