Truncation of a stem. Enzym* finds enzyme, enzymes, enzymatic, enzymological.....
Double Quotes hold words together in order. "pinus radiata" "soil horizon"
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Database Intermarriage
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Medline vs Pubmed vs PubmedCentral
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Bibliographic citations with abstracts derived from over 5,000 serials published in over 100 countries; monographs (including reports); books; newsletters; conference papers and abstracts.
Zoological Record covers all aspects of modern animal research, including: Behavior; Biodiversity; Conservation; Ecology; Evolution; Genetics; Habitat; Morphology; Nomenclature; Parasitology; Physiology; Reproduction; Taxonomy; and Zoogeography.