Biology
ProQuest Biology
Provides comprehensive coverage of biological science fields including animal behavior, aquatic life and fisheries, chemoreception, biochemistry, ecology, plant science, toxicology, virology, microbiology, immunology genetics, health, and safety science, oncogenes, entomology, and endocrinology neuroscience.

ProQuest Science Journals
Extensive science & engineering journals collection

Scopus
The largest abstract and citation database of peer-reviewed research literature 

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