Federal Government Search Tools
Combined Health Information Database (CHID) Searach
SciTechResources.gov: Medicine & Biotechnology
SciTechResources.gov: Biological Sciences

General & Scientific Search Engines
Google
Infomine
Scirus

Biology
Bio Netbook, Institute Pasteur
National Biological Information Infrastructure (NBII)
National Center for Biotechnology Information

Chemistry
ChemWeb

Medicine
Clinical Studies
Full-Text Articles from PubMed Central
Health & Medicine from MEDLINEplus
Medical Journal Abstracts from PubMed

Pharmacology
FDA Orange Book