Bacterial communities of the Black Sea exhibit activity against persistent organic pollutants in the water column and sediments.

The ability of bacteria to degrade organic pollutants influences their fate in the environment, impact on the other biota and accumulation in the food web. The aim of this study was to evaluate abundance and expression activity of the catabolic genes targeting widespread pollutants, such as polyaromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and hexachloro-cyclohexane (HCH) in the Black Sea water column and sediments. Concentrations of PAHs, PCBs and HCH were determined by gas chromatography (GC) coupled to mass spectrometry (MS) and electron capture (ECD) detectors.

Bounded analytic bond-order potentials for sigma and pi bonds.

Novel analytic bond-order potentials (BOP's) are derived for the sigma and pi bonds of sp-valent systems that are correctly bounded from above by unity. We show that these BOP's allow the concept of single, double, triple, and conjugate bonds in carbon systems to be quantified, the average error compared to accurate tight-binding predictions being only 1% for the sigma bonds and 15% for the pi bonds. Although molecular dynamics simulations are an order of magnitude slower than with standard Tersoff potentials, these new BOP's provide the first "classical" interatomic potentials that handle both structural differentiation and radical formation naturally within its framework.

[A diagnostic module for gestosis].

Changes were recorded in central and periphery haemodynamic indices during the uncomplicated pregnancy, at the onset of preeclampsia, and postpartum, in the relevant studies made. The following three cardiodynamic phase syndromes were found to be developing through stages during physiological pregnancy against the background of hypervolemia: volume loading under 22 to 24 weeks, hyperdynamic state at 28 to 32 weeks, and hypodynamic one antepartum. Preeclampsia is associated with changeable haemodynamic indices, which fact is chiefly hypervolemia-related.

[Jejunoileal bypass in the prevention and treatment of clinical manifestations of atherosclerosis in patients with morbid obesity].

Jejunoileostomy effects on blood lipids and cardiovascular system were investigated in obese patients. They were found to lose 30% of their body mass within 6 postoperative months with parallel reduction in concentrations of total cholesterol, triglycerides, LDL and VLDL cholesterol and apoprotein B. These changes persisted for 4.