PMC (PubMedCentral)

PubMed Central® (PMC) is a free digital database of biomedical and life sciences journals which are stored as full text versions.

The archive has been founded in the year 2000, and as of today it contains nearly 4 million articles most of which have a corresponding reference entry in the database PubMed.


Contributors to this archive are mainly participating journals who do this under three different programs:

  • Almost 2,000 journals have a full participation commitment, i.e. allof their articles are deposited in PMC.
  • About 300 journals have a limited commitment of only distributing articles which are results of public funding.
  • More than 3,000 journals contribute not complete issues, but only selected articles.

Participation of the journal publishers in PMC is voluntary; although participating journals must meet certain scientific and technical standards, which are established and supervised by a PMC advisory committee.

In addition to these more than 5,000 journals, also articles from individual authors – created under public funding policies – will be accepted.

In Summary

If you want or need to read bioscience articles in their full text version, PubMedCentral is the suitable tab to be opened in ChemAnalyser. And be confident: ChemAnalyser with its powerful chemical/bioscience annotation set will make this reading a structured, enjoyable, and efficient experience.

More Web Sources

In addition to the sources already mentioned, ChemAnalyser makes an attempt to continuously identify other high-quality web sites with a special focus on chemistry, drugs, nutrition, and health throughout the Internet. Results from these additional sources are accessible in ChemAnalyser under the tab „Web“.


These can be selected

  • governmental or non-governmental,
  • organisational or institutional,
  • academical / educational sites.


By parameter, the search result can be focused on the user's region(s) of interest. Just to give you an impression of the globality of these results, we list below the current regional distribution:

Africa4 %
Asia5 %
Australia6 %
Europe30 %
North America40 %
South America3 %
World12 % 


With these sources being as diverse as they are, ChemAnalyser makes a special attempt of standardizing the result output as far as possible by following means, amongst others:

  • Standardization of different input formats (text and picture PDF, XML, etc.),
  • Language detection,
  • Sentence splitting, tokenization.

Only after these preparatory processes have been accomplished, the chemical annotation and structuring can take place.

In summary

The results offered under the tab „Web“ in ChemAnalyser saves the user from tedious own Internet searching. Furthermore, the results are much more readable than the „raw“ Internet data themselves would be.