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  • Author or Editor: M. Diksic x
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Abstract  

Activation analysis of Canadian and Turkish clays showed that the elements Cs, Th, Sc, Hf, Ta and Co were the most useful elements to study in order to obtain a differentiation by multivariate analysis. The same elements were used to study a variety of Turkish potsherds. It was found that Roman and Byzantine pottery from Yalincak, and Phrygian pottery from Great Tumulus and Tumulus 2 were most probably made from local clay beds. Phrygian pottery from Yalincak shows a tendency to form a small sub-group. However, there are a large number of outliers. No such grouping was found with the Bronze Age pottery analyzed.

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Abstract  

Statistical treatment was carried out using the elements determined both by neutron activation and X-ray fluorescence analysis in order to decide on the method to be used in the future work.

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Abstract  

This paper decribes syntheses for the11C-labelled chemotherapeutic drug, CCNU,11C-labelled BFNU and CFNU (analogs of BCNU) as well as an improved synthesis for11C-BCNU. Also discussed are procedures for the separation of dual isomers in the case of11C-labelled CCNU and CFNU. The specific activity of these no-carrier-added radiopharmaceuticals was approximately 104 lower than expected for a carrier-free product. The syntheses were normally finished 20–25 min after the end of the collection of11C-COCl2. Chemical and radiochemical purity of the final product, as determined by HPLC and TLRC respectively, was at least 98%. The syntheses yielded 10–25 mCi of nitrosourea ready for use in PET studies.

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