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Isotopic Pattern Calculator 1.4
Isotopic Pattern Calculator is a calculates isotopic distributions. more>>
IPC is a program that calculates the isotopic distribution of a given chemical formula. It gives the rel. intensities and the propability of the masses belonging to a molecule ion, fragment or whatever is represented by the given chemical formula.
Furthernmore it can use GNUPlot to visualize the result. Only masses with a rel. Intensity bigger then 0.009% are shown. Additionaly ipc prints the overall number of peaks and the needed computation time.
The program uses an algorithm which computes the exact isotopic distribution. This leads to a large number of peaks which have very low rel. abundances. Even for a small molecule as Acetylsalicylic acid ( C9H8O4, Mr=180.15) there are 1350 peaks but only nine of them have a rel. abundance higher then 0.01%.
Enhancements:
- A complete list of elements and isotopes is now used.
- The list of elements is taken from the NIST.
<<lessFurthernmore it can use GNUPlot to visualize the result. Only masses with a rel. Intensity bigger then 0.009% are shown. Additionaly ipc prints the overall number of peaks and the needed computation time.
The program uses an algorithm which computes the exact isotopic distribution. This leads to a large number of peaks which have very low rel. abundances. Even for a small molecule as Acetylsalicylic acid ( C9H8O4, Mr=180.15) there are 1350 peaks but only nine of them have a rel. abundance higher then 0.01%.
Enhancements:
- A complete list of elements and isotopes is now used.
- The list of elements is taken from the NIST.
Download (0.070MB)
Added: 2005-08-15 License: GPL (GNU General Public License) Price:
1531 downloads
Open Babel 2.0.2 / 2.1.1
Open Babel is a cross-platform chemistry program and library designed to convert file formats. more>>
Open Babel project is designed to pick up where Babel left off, as a cross-platform program and library designed to interconvert between many file formats used in molecular modeling and computational chemistry.
Main features:
- A huge variety of common chemical file formats, including SDF/MOL, Mol2, PDB, SMILES, XYZ, CML... (details)
- Recognition of file type based on filename extension
- Chemical MIME support
- SMARTS matcher
- Flexible atom typer
- Flexible bond typer for perception of multiple bonds from atomic coordinates
- Gasteiger partial charge calculation
- Hydrogen addition and deletion
- Isotope support, calculation of average and exact masses
- Automatic feature perception (rings, bonds, hybridization, aromaticity)
- Multiple conformer storage within molecules
- Command line conversion for multiple molecules in one file
- Command line interface
- Bitvector class
- Vector and matrix transformations
- Molecular test suite
- Open-source/Free Software under the GNU General Public License
- Cross platform (Windows, Linux, Mac OS X, SGI, Solaris, Dreamcast...)
Version restrictions:
- Generate coordinates for SMILES strings. (Meaning all coordinates will be zero when converting from a SMILES string.)
- Handle 2D->3D conversion (or vice versa).
- Handle a variety of important file formats.
Whats New in 2.1.1 Development Release:
- Improved scripting support, including dictionary-support for OBGenericData in pybel, casting from OBUnitCell, etc. Improved access to OBRings from OBMol.GetSSSR().
- Added support for descriptors (e.g., PSA, logP) from scripting interfaces.
- Added support for reading all PDB records (beyond current atom and bond connections). Records not handled directly by Open Babel are added as key/value pairs through OBPairData.
- Added a new configure flag --with-pkglibdir to allow Linux package distributors to define version-specific directories for file format plugins.
- Fixed a bug which would not output chirality information for canonical SMILES with 3D files.
- Fixed problems with new line-ending code. Now correctly reads DOS and old Mac OS files with non-UNIX line endings.
- Correctly rejects SMILES with incorrect ring closures. Thanks to Craig James for the report.
- Fixed a crash when output to canonical SMILES.
- Fixed a crash when converting from SMILES to InChI.
- Fixed a crash when reading some PDB files on Windows.
- Fixed a crash when reading invalid MDL/SDF files.
- Fixed a bug which made it impossible to read some GAMESS files.
- Fixed a problem when reading ChemDraw CDX files on Mac OS X.
- A large number of additional fixes, including some rare crashes.
<<lessMain features:
- A huge variety of common chemical file formats, including SDF/MOL, Mol2, PDB, SMILES, XYZ, CML... (details)
- Recognition of file type based on filename extension
- Chemical MIME support
- SMARTS matcher
- Flexible atom typer
- Flexible bond typer for perception of multiple bonds from atomic coordinates
- Gasteiger partial charge calculation
- Hydrogen addition and deletion
- Isotope support, calculation of average and exact masses
- Automatic feature perception (rings, bonds, hybridization, aromaticity)
- Multiple conformer storage within molecules
- Command line conversion for multiple molecules in one file
- Command line interface
- Bitvector class
- Vector and matrix transformations
- Molecular test suite
- Open-source/Free Software under the GNU General Public License
- Cross platform (Windows, Linux, Mac OS X, SGI, Solaris, Dreamcast...)
Version restrictions:
- Generate coordinates for SMILES strings. (Meaning all coordinates will be zero when converting from a SMILES string.)
- Handle 2D->3D conversion (or vice versa).
- Handle a variety of important file formats.
Whats New in 2.1.1 Development Release:
- Improved scripting support, including dictionary-support for OBGenericData in pybel, casting from OBUnitCell, etc. Improved access to OBRings from OBMol.GetSSSR().
- Added support for descriptors (e.g., PSA, logP) from scripting interfaces.
- Added support for reading all PDB records (beyond current atom and bond connections). Records not handled directly by Open Babel are added as key/value pairs through OBPairData.
- Added a new configure flag --with-pkglibdir to allow Linux package distributors to define version-specific directories for file format plugins.
- Fixed a bug which would not output chirality information for canonical SMILES with 3D files.
- Fixed problems with new line-ending code. Now correctly reads DOS and old Mac OS files with non-UNIX line endings.
- Correctly rejects SMILES with incorrect ring closures. Thanks to Craig James for the report.
- Fixed a crash when output to canonical SMILES.
- Fixed a crash when converting from SMILES to InChI.
- Fixed a crash when reading some PDB files on Windows.
- Fixed a crash when reading invalid MDL/SDF files.
- Fixed a bug which made it impossible to read some GAMESS files.
- Fixed a problem when reading ChemDraw CDX files on Mac OS X.
- A large number of additional fixes, including some rare crashes.
Download (2.3MB)
Added: 2007-07-08 License: GPL (GNU General Public License) Price:
527 downloads
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