Volatile heterometallics: structural diversity of Pd-Pb β-diketonates and correlation with thermal properties.

Volatile heterobimetallics based on Pb(ii) hexafluoroacetylacetonate as a host material and a range of Pd(ii) complexes containing both various donor atoms and terminal substituents in the β-diketonate ligand have been studied to trace the influence of the nature of the initial monometallic complexes on the structure, composition and thermal properties of heterobimetallic compounds. The structural variety and stoichiometry of the heterobimetallic compounds are caused by various combinations of the competing donor-acceptor interactions between the constituting monometallic moieties. The major structure forming factor is the metallophilic interaction between Pd and Pb atoms resulting in polynuclear structures with a specific topology.

[Investigation of the safety of the product "Rialam."].

The data on safety investigation of product "Rialam", which is proposed as biologically active food supplement are presented. Chronic experiment and single generation experiment were made on Wistar rats. It is shown that diet "Rialam" in dose 100 mg/kg of body weight didn't influence negatively on growth and development of rats blood parameters, immune status, internal organs morphology, metabolism, hadn't embryotoxic, gonadotoxic and teratogenic action.

[The postradiation radiosensitivity of rats following partial external irradiation of the abdominal area].

After double partial X irradiation of abdomen the postirradiation radiosensitivity of mongrel male rats was studied by the criterion of a median lethal dose; clinical and laboratory parameters were investigated after preirradiation with 4.6 and 8 Gy. A function is proposed linking the dynamics of the postirradiation radiosensitivity of rats with the proliferative activity of small intestine and its total cellularity.

[The postradiation radiosensitivity of rats following uniform external irradiation].

In experiments with mongrel male rats exposed to double uniform gamma-irradiation (60Co), the postirradiation radiosensitivity was studied by the criterion of a median lethal dose; clinical and laboratory indices were investigated after preirradiation with doses of 1-5 Gy. A function was proposed to link the dynamics of the postirradiation radiosensitivity of rats to the proliferative activity of bone marrow and its total cellularity.

[Postirradiation change in the radiosensitivity of rats in relation to the preliminary radiation dose in the cutaneous form of radiation injury].

The experimental animals were exposed two times to soft 17kV X-radiation. Post-irradiation changes in radiosensitivity were shown to depend upon dose of preliminary irradiation (10, 18 and 25 Gy). The state of radiosensitive tissues was studied and a comparison was made of a residual damage curve with a change in the proliferative activity of dividing tissue elements during 30 days after irradiation.