Two suspensions of magnetic nanoparticles were prepared based on chemical coprecipitation of magnetite(MN1) and cobalt ferrite (MN2) from iron and respectively iron and cobalt salts, the magnetic powders being coated in sodium oleate for stabilization in deionized water. Microstructural and magnetic characterization was accomplished in both cases by applying standard methods. Two bacterial strains: Staphylococcus aureus – a Gram positive germ,

he scintigraphic investigation of normal and pathological kidneys was carried out using specialized gamma-camera device from nuclear medicine hospital department. Technetium 90m isotope with gamma radiation emission, coupled with vector molecules for kidney tissues was introduced into the subject body, its dynamics being recorded as data source for kidney clearance capacity. Two representative data series were investigated, corresponding to healthy

The stability of magnetic nanoparticle suspensions, designed for biomedical purposes can be ensured by coating magnetic cores with various organic shells. In this work, the magnetite powder was successfully dispersed in water by using steric stabilization and electrostatic interactions - with volume fraction ranging between 2.42 and 3.14 %. The mean physical diameter of colloidal nanoparticles was of 9.2 ÷ 11.98 nm with non-magnetic shell of 2.7

The molecular parameters of 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) and some compounds based on triphenylformazans (TPFs) — resulting from the enzymatic transformation of TTC, were subjected to comparative investigation on the basis of semi-empirical quantum-chemical simulations, revealing some changes in dipole moment and polarisability in the TPFs in comparison with TTC. Chemical shift due to substituents was discussed using electronic

Various uses of ferrofluids for technical applications continuously raise the interest in improvement and optimization of preparation methods. This paper deals with preparation of finely granulated magnetite particles coated with oleic acid in hydrocarbon suspensions following either chemical co-precipitation from iron salt precursors or wet milling of micron size magnetite powder with the goal to compare the benefits and disadvantages of each method.