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PubMed Central is a free digital archive of full articles, accessible to anyone from anywhere via a web browser (with varying provisions for reuse). Conversely, although PubMed is a searchable database of biomedical citations and abstracts, the full-text article resides elsewhere (in print or online, free or behind a subscriber paywall).
PubMed is a openly-accessible free database which includes primarily the MEDLINE database of references and abstracts on life sciences and biomedical topics. The United States National Library of Medicine (NLM) at the National Institutes of Health maintains the database as part of the Entrez system of information retrieval.
A meta search engine for 50 major bioinformatic databases and projects. Free Available from Liebel-Lab KIT Karlsruhe Institute of Technology Book Review Index Online: Book reviews: Subscription Thomson Gale [28] Books In Print: Books: Subscription R.R. Bowker [29] CAB Abstracts: Applied life sciences
Its collections include more than seven million books, journals, technical reports, manuscripts, microfilms, photographs, and images on medicine and related sciences, including some of the world's oldest and rarest works. As of October 2023 the acting director of the NLM was Stephen Sherry. [4]
The Entrez Global Query Cross-Database Search System is used at NCBI for all the major databases such as Nucleotide and Protein Sequences, Protein Structures, PubMed, Taxonomy, Complete Genomes, OMIM, and several others. [9] Entrez is both an indexing and retrieval system having data from various sources for biomedical research.
PubMed: biomedical literature citations and abstracts, including Medline—articles from (mainly medical) journals, often including abstracts. Links to PubMed Central and other full-text resources are provided for articles from the 1990s. PubMed Central: free, full-text journal articles; Site Search: NCBI web and FTP web sites; Books: online books
A preliminary search in WorldCat and in PubMed, two among many relevant bibliographic and citation indexes, shows the following: Books: WorldCat shows "53 works in 204 publications in 4 languages and 2,004 library holdings" for Hansch as "author, editor, other". [ 12 ]
Engines designed to search MEDLINE (such as Entrez and PubMed) generally use a Boolean expression combining MeSH terms, words in the abstract and title of the article, author names, date of publication, etc. Entrez and PubMed can also find articles similar to a given one based on a mathematical scoring system that takes into account the ...