Radiation Induced Enhancement of Hydrogen Influence on Luminescent Properties of nc-Si/SiO Structures.

Using photo-luminescence, infrared spectroscopy, and electron spin resonance technique, the silicon dioxide films with embedded silicon nanocrystals (nc-Si/SiO structures) have been investigated after γ-irradiation with the dose 2 × 10 rad and subsequent annealing at 450 °C in hydrogen ambient. For the first time, it was shown that such a radiation-thermal treatment results in significant increase of the luminescence intensity, in a red shift of the photoluminescence spectra, and in disappearance of the electron-spin resonance signal related to silicon broken bonds. This effect has been explained by passivation of silicon broken bonds at the nc-Si-SiO interface with hydrogen and by generation of new luminescence centers, these centers being created at elevated temperatures due to transformation of radiation-induced defects.

[Metabolic disturbances as a factor of the pathogenesis of hypertensive disease and its clinical outcomes].

Aim: To identify and determine the mechanisms of an association between arterial hypertension (AH) and proatherogenic systemic metabolic disturbances in hypertensive disease (HD), as well as the possibility of eliminating these disturbances by antihypertensivetherapy.

Subjects And Methods: Fifty-four patients with HD and 64 persons randomly selected from an unorganized urban population were examined. Systolic and diastolic blood pressure (BP), insulin sensitivity, the most important metabolic parameters of lipids, lipoproteins, and glucose, the degree of systemic inflammation and oxidative stress, and the rate of lipoprotein proatherogenic and immunogenic modification were determined.

[Hypertrygliceridemia as a factor of atherogenesis: significance and mechanisms of action].

The aim of the study was to investigate the pattern of lipid and lipoprotein metabolism disturbances in patients with manifested clinical signs of coronary atherosclerosis. There was determined the significance of hypertrigliceridemia as the marker of these disturbances and its connection with other most important factors of atherogenesis such as insulin resistance, systemic inflammation, and oxidative stress, blood lipoprotein modification. The role of excessive alimentary lipid consumption as a factor, which initiates the hypertrigliceridemia development and accompanying activation of the other proatherogenic factors was determined with the use of acute lipid loading.

[Surgical treatment of Meckel diverticulum complicated by an acute hemorrhage].

Mekkel's diverticulum (MD)--is the inborn anomaly, caused by incomplete yolk duct development, it is present in near 2% of population and in 95% of observations lacks clinical manifestations. Symptoms of the disease manifest while complications occurrence only--in presence of peptic ulcer with possible hemorrhage and perforation occurrence, while ileus, diverticulitis, hernia, umbilicus fistula and tumor development. Eight patients, suffering MD, complicated by gastrointestinal hemorrhage, were treated during 1983-2006 yrs in Kyiv's city center for giving the aid to patients suffering gastrointestinal hemorrhage (GIH).

[The presence and characteristics of interrelations between lipid metabolism disorder and systemic inflammation].

The aim of the investigation was to determine the existence and describe interconnection between the lipid metabolism disturbances and development of systemic inflammation. The work was carried out on rabbits in two series of experiments: in the first one, the model of inflammation was reproduced by means of intravenous injection of bacterial lipopolysaccharide. In the second one, the model of lipid disturbances induced by lipids enriched diet was reproduced.