This workflow calculates the molecular weight of molecules stored in a postgres sql database with the Pgchem::tigress chemoinformatics cardridge. The cardridge perform the molecular weight calculation. The get a moleculear weight distribution worker creates a chart of the available data.
org.openscience.cdk.applications.taverna.tools.GetMolecularWeightDistribution
org.openscience.cdk.applications.taverna.database.pgchem.GetMolecularWeightFromDB
jdbc:postgresql://localhost/cdktaverna
Select id, molweight(molecule) From molecules