No abstract

The specific activity of 235U and content of native uranium for the Kharkiv region in drinking water, soil, roots, the leaf of hydrophyte “Pistia stratiotes” and the samples of kidney stones obtained from patients with urolithiasis were measuring by using gamma activation analysis on linac accelerator of NSC KIPT. The whole sample contained alpha-emitter uranium.

A new ligand containing selenium, Se (CH2‐N‐Btrzole)2 (Lse) (Btrzole = benzotriazole) and its cobalt(II) complex, Co(Lse)2(SCN)2, have been synthesized and the molecular structures of the title compounds have been determined by X‐ray techniques. The Lse is a meso‐configuration with a symmetric plane through the Se center, the intermolecular weak interactions of SeSe, SeN and ππ stacking between benzotriazole rings to extend the molecular structure to two‐dimensional network configuration. In the Co(II) complex, the metal center is in a six‐coordinated octahedral environment. Two Co(II) atoms are linked by two ligands to form a 20‐membered macrocycle; the adjacent macrocycles are linked by coordinated bond of CoNbentrozole to extend an infinite double strained chain. The SOD activity of the ligand and Co(II) complex have been studied by using the pyrogallol autoxidation method; thermal properties and luminescent properties of Co(II) complex have been tested, and the details of those properties have been discussed. Copyright © 2007 John Wiley & Sons, Ltd.

The possibility production of 99Mo radioisotope with using recoil nuclei of molybdenite nanoparticles from reaction 100Mo(γ,n)99Mo was investigated. The use of thermally stable molybdenite allows solving the problem of thermal loads of high-power electron beams. The enrichment of radioactive isotopes carried out by the effect of SzilardChalmers. Molybdenite nanoparticles were irradiated by bremsstrahlung with Emax=39 MeV. The recoil nuclei of 99Mo separated by electrolysis at low concentration. The yield of 99Mo from extractable phase amounted 3% for size nanoparticles 350 nm.

The photonuclear technology of preparation radioactive cisplatin 195mPt was been developed by the bremsstrahlung from the electron accelerators. In the novel technology, the production of 195mPt from reaction 197Au(γ,np)195mPt with a high specific activity >1 Ci/mg-1 was realized. The Ehrlich adenocarcinoma cells were been used as a neoplastic model. There are two groups: 1. tumor cells with non-radioactive cisplatin; 2. tumor cells with radioactive cisplatin (0.17 pg 195mPt-cisplatin). The number of morphology death cells as a result of radioactive cisplatin action was more than after action of non-radioactive cisplatin. The different mechanisms of the morphology death cell (necrosis for non-radioactive and apoptosis for radioactive) were detected.