Current usage is:
Registered Users: 1116
Structures: 43440
Spectra: Measured 52037, calculated 549

Logon with SSL
Use cookies for persistant login
ImpressumProblems using nmrshiftdb2? See our tips on browsers to use !

  Home     Search     Results     Quick Check     Predict     Assignment     Submit     Review     Help  
  nmrshiftdb2 Help  

1. About nmrshiftdb2

1.1. What is nmrshiftdb2?

nmrshiftdb2 is a web database for organic structures and their nuclear magnetic resonance (nmr) spectra. It allows for spectrum prediction as well as for searching spectra, structures and other properties. Last not least, it features peer-reviewed submission of datasets by its users. The nmrshiftdb2 software is open source, the data is published under an open content license. Currently, only one-dimensional NMR shift data (13C, 1H, 15N, 31P etc.) can be stored, but the architecture of the software allows for future extension to other nuclei, e.g., correlated 1H/13C data, etc. The implemented search algorithms can scan the database for example for the following items: substance name, formula, structure, substructures, chemical shifts, and a Hit List of best matches is generated. Furthermore, a shift prediction algorithm based on the molecular HOSE code and the measured shift data has been included. For proton spectra a prediction based on 3D molecular properties is available.

It is the policy of nmrshiftdb2 to have its content freely available. This means that spectra in nmrshiftdb2 can be accessed and used without restrictions. Access to single items is possible via the software and we also make available the bunch data (without the personal data). Note that, according to our opinion, NMR spectra do not represent "literary and artistic works" as mentioned in Art. 2 (1) of the Berne Convention, the author of a spectrum is, so to say, nature, and that therefore there is no copyright in NMR data. nmrshiftdb2 as a database is a protected work in the sense of article 5 of the WIPO Copyright Convention, authored by its contributors and reviewers. It is available under the ) are provided. nmrshiftdb2 will work without any special plugins, but at numerous places you can switch to a Java-based version. This gives additional comfort with entering and viewing data, but a prerequisite for your browser is then that the Java VM (virtual machine) must be installed and JavaScript activated. A major problem in the development of Web-based applications is the wide range of ever-changing capabilities and incompatibilities of the popular browsers in use. In the following we offer some comments and tips concerning browser choice, based on current experience, and we welcome your comments.

1.3. Getting involved

nmrshiftdb2 is an open-source, open-access application, and users are strongly encouraged to get involved, not only by submitting spectra, but also by reporting bugs and making suggestions for improvements and new functionalities.

Bugs should be reported to the administrator; please give details, browser and operating system used, date and time of failure. You can also use the bug tracker.

Interested users are also encouraged to submit code or documentation; please visit the Project Homepage at SourceForge. If you have any questions, do not hesitate to email the administrator.


nmrshiftdb2 (V. 1.4.11, nmrshiftdb.nmr.uni-koeln.de, currently 286 users, 1424842 since 2010-12-14 23:09:00.0) © NMRShiftDB project 2002-2010, © Stefan Kuhn 2010 - 2017.