European Communities Joint Research Center

Jarvis-Patrick clustering has also been used to support QSAR analysis in a system developed at the European Communities Joint Research Center. " ° The EINECS (European Inventory of Existing Chemical Substances) database contains more than 100,000 compounds and has been clustered using 2D structural descriptors. That database also has associated physicochemical properties and activities, but the data is very sparse. Jarvis-Patrick clustering was used to extract clusters containing sufficient compounds with measured data for an attempt to be made to estimate the properties of members of the cluster lacking the data. For a few clusters, it was used to develop reasonable QSAR models. 

Programme Progress Report Plutonium Fuels and Actinide Research , TUSR 27, Joint Research Center of the European Community, p. 102 (1979)... 

Commission of European Communities (1990) Indoor air pollution by formaldehyde in European countries. Report No. 2, COST Project 613, Joint Research Center, Ispra, Italy. 

The issues of method validation and assessment of measurement uncertainty in the determination of potentially toxic trace elements in rice are of permanent interest for the scientific community. In this context, the sources of uncertainty associated with the determination of Cd, Cu, Pb, and Zn have been recently estimated in rice through an interlaboratory comparison [30]. Four Brazilian laboratories participated in the proficiency test. The analytical technique used were FAAS, ET-AAS, and ICP-AES. The rice samples were supplied by the Institute for Reference Materials and Measurements (IRMM), Joint Research Center of the European Commission, within the scope of the interlaboratory comparison International Measurement Evaluation Programme (IMEP) 19 Trace Elements in Rice (see also Chapter 7 in this book). Three out of the four laboratories reported values close to the reference values. It was emphasized that, in order to establish a reliable uncertainty budget, all significant sources of uncertainty should be identified. 

Petten Establishment, Joint Research Center Commission of the European Communities... 

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