Over the years I’ve come across many resources and have tried to consolidate them in one central location.  It first started with a few Excel Spreadsheets, then Access databases and some website links.  As my databases got larger and larger I had to move on to SQL because it was less bulky and pretty quick.  With this came a larger learning curve but finally I have a mySQL server running on my website and use PHP to access and enter information.  I still have a ways to go, but this is a good starting point.  [More]

If you find that during use of the database, you do not recognize a term.  Check the definitions page for an explanation.  This database has many tandem mass spectrometry transitions (precursor-to-product) from multiple sources and is constantly growing.  It also has a built in molecular isotopic mass distribution calculator; clicking on any “Formula” in the Chemicals Search results will show a dynamically predicted mass spectrum.  This is useful for tandem MS chemists looking for the most appropriate precursor for a particular molecule.  The algorithm was built and designed by myself in Sci-lab and then translated to PHP code.  JPGraph is used to generate the plots

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If you have any questions about this database, I can be contacted at this email address:  david  at  schiessel  dot  us (written out to decrease spam in my Inbox).  Also, feel free to connect with me on LinkedIn: