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Through Lib4RI, you have access to a large number of databases. You can filter the list by topic or alphabetically and find a brief description of each of the databases.
The Cambridge Crystallographic Data Centre (CCDC) and FIZ Karlsruhe offer the free service Access Structures via their WebCSD portal to view and retrieve structures from their crystallographic databases CSD (organic compounds) and ICSD (inorganic compounds). Through Access Structures you can view the data sets in both 2D and 3D, see some basic information about the structures and download individual deposited data-sets.
This free service has its limitations regarding search capabilities offered. Please refer to more detailed information on WebCSD and the free Access Structures service.
For Advanced searches of inorganic structures (ICSD) please use this interface.
Open databaseThe Central Discovery Index (CDI) is a multidisciplinary index of scholarly materials. Recorded are electronic books, journal articles and more; depending on the source metadata or full text indexed. The CDI is offered by Ex Libris (via swisscovery) who receive the data from primary and secondary publishers, aggregators and open access collections. In swisscovery, the «Central Discovery Index (CDI)» is used when the search query is performed via the search scope Central Discovery Index (CDI) and additionally also a part of the full search scope swissvovery.
Open databaseChemSpider is a free chemical database providing fast text and structure search access to over 26 million structures. The database is owned and supported by the Royal Society of Chemistry. It aggregates structures, spectra, properties, suppliers, syntheses, and other information from hundreds of data sources into a single searchable repository with links back to the original data sources. ChemSpider is not just a search engine; it is also a crowdsourcing community for chemists who contribute their data, skills, and knowledge to the curation of the database.
ChemSpider SyntheticPages extends this model of a community curated database to cover reactions, providing quick publication (including the assignment of a DOI), peer review and semantic enhancement of repeatable reactions.
Getting Started with ChemSpider
Introductory Video to ChemSpider
Open database
The Cochrane Library contains systematic reviews summarising current medical research. It is considered as a reliable source for evidence based medicine. Review summaries in German are also available.
Open databaseCORE aggregates open access research outputs from repositories and journals worldwide and makes them available to the public.
Open databaseEstablished in 2000 by scholarly publishers as an independent, non-profit entity, CrossRef enables researchers to navigate electronic journals, books and other documents across publishers, based on the Digital Object Identifier (DOI).
CrossRef metadata search is particularly helpful to quickly resolve a given DOI and find the corresponding document (eg search for 10.1038/nature09211), and also to find the very DOI associated with a given document (eg search for Cai bottom-up fabrication of graphene).
Please see CrossRef's Help & Example Queries for additional search options.
Open databaseComplete tables of contents and bibliographic information from leading scholarly journals and books (1998-present); also includes relevant, evaluated websites and documents.
Access pre-published electronic journal articles and search more than articles with cover-to-cover indexing from the subsequent disciplines:
Note that Current Contents Connect is accessible via Web of Science.
Open database