of isotopically labelled vitamin D metabolites by HPLC. Journal of Chromatography 303: 229}233. Kaspersen FM, van Acquoy J, van de Laar GLM, Wagenaars GN and Funke CW (1984) Deuterium isotope effects in mianserin. Recueil Travaux Chimique de Pay-Bas 103: 32}36. Klein PD (1966) Occurence and signiRcance of isotope fractionation during analytical separation of large molecules. Advances in Chromat...

In this paper a Pattern Recognition algorithm based on a constrained version of the k-means clustering algorithm will be presented. The proposed algorithm is a non parametric supervised statistical pattern recognition algorithm, i.e. it works under very mild assumptions on the dataset. The performance of the algorithm will be tested, togheter with a feature extraction technique that captures th...

Conservation Biogeography and Macroecology Programme, School of Geography and the Environment, University of Oxford, Oxford OX1 3QY, UK, Departamento de Cîencias Agr arias – CITAA, Azorean Biodiversity Group, Universidade dos Ac ores, Angra do Hero ısmo, Pico da Urze, 9700-042 Terceira, Ac ores, Portugal, Department of Biogeography, BayCEER, University of Bayreuth, Bayreuth D-95447, Germany, De...

• Au and Ag deportment in an intermediate sulfidation Ag-Pb-Zn system. Deportment calculation using quantitative mineralogy, bulk mineral chemistry. Deportments are highly variable between samples due to mineralogical contrast. Gold the Freiberg district is primarily hosted by arsenopyrite electrum. Silver sulfosalts fahlore. data essential for planning of mining minerals processing operations....

Assimilation of crustal rocks by mafic magmas is considered important for the formation of sulfide ores. Radiogenic isotope systems may allow one to quantify the amount of contamination and to distinguish between possible contaminants. We have studied Sm-Nd, Rb-Sr, and U-Pb isotope systems in two mafic intrusions of the Nain Plutonic Suite: the 1333 Ma Voisey’s Bay intrusion that hosts the majo...