This paper concerns the problems of the average widths and the optimal recovery of the anisotropic H�lder classesWrHα(Rd) of smooth functions defined on the Euclidean spaceRd in the metricCk(Rd). The weak asymptotic behavior is established for the corresponding quantities.
In the present study, a novel 99mTc nitrido dithiocarbamate complex containing ether group, the bis(2-ethoxyethyl dithiocarbamato) nitrido 99mTc complex 99mTcN(EOEDTC)2 has been synthesized by the reduction of 99mTcO4− into [99mTcN]2+ with stannous chloride in the presence of succinic dihydrazide and propylenediamine tetraacetic acid, followed by the addition
of the corresponding dithiocarbamate ligand. The radiochemical purity of the complex was over 90% as measured by thin layer
chromatography (TLC). In vitro studies showed that the complex possessed good stability. Its partition coefficient indicated
that it was lipophilic complex. The electrophoresis results showed the complex was neutral. Biodistribution in mice showed
that the complex accumulated in the heart and brain with high initial uptake, suggesting the complex may lead to a further
development of the radiopharmaceutical as a heart and brain perfusion tracer.