NCBI (National Center for Biotechnology Information) is a cross-database search engine for approximately 24 life science databases. Some of the subjects covered include: gene sequences, molecular structure, proteins, and nucleotides.
NextBio alleviates the challenges that are facing the life sciences industry and has developed a suite of products which allow researchers to extract knowledge from disparate biological, clinical, and chemical data, regardless of data type or origin. NextBio's integrated database contains publicly available data from a variety of sources, including GEO, caBIG, and Array Express, among others.
PubChem provides information on the biological activities of small molecules. PubChem is organized as three linked databases within the NCBI's Entrez information retrieval system. These are PubChem Substance, PubChem Compound, and PubChem BioAssay. PubChem also provides a fast chemical structure similarity search tool.
Science.gov is a search engine for government science information and research results. Currently in its fourth generation, Science.gov provides search of more than 50 million pages of science information with just one query, and is a gateway to over 1,800 scientific Web sites.
Written to introduce chemistry students to the ways chemists communicate...The book covers the most important forms of communication - textbooks, lectures, lab reports, articles, literature reviews, and oral presentations.
Web of Science is the world's largest, high-quality interdisciplinary database back to 1965. All subject areas are covered, but the sciences are covered very well. WoS is easy to use, but it has many advanced features that make it an excellent tool for advanced researchers. See the Web of Science page for searching instructions.
You can search all these databases, or select only one.
Web of Science (Arts & Humanities Index, Science Citation Index, Social Sciences Index)
BIOSIS (the leading biological sciences database)
Current Contents (current awareness database covering more than 7,000 journals)