Evaluation of current natural and anthropogenic radionuclide activity in coastal area bottom sediments of the Barents Sea (North of the Kola Peninsula).

This article is devoted to the study of the activity of technogenic Cs and Sr, as well as natural radionuclides K, Th and Ra in bottom sediments of the Kola coast of the Barents Sea, where a significant number of radiation objects are concentrated. In order to characterize and assess the accumulation of radioactivity in the bottom sediments, we studied the particle size distribution and some physicochemical parameters, such as the content of organic matter, carbonates and ash components. The average activities of natural radionuclides Ra, Th and K were 325.

Assessment of heavy metals distribution and environmental risk parameters in bottom sediments of the Pechora River estuary (Arctic Ocean Basin).

The article is devoted to the study of the content of heavy metals in the bottom sediments of the estuary of the Pechora River, which is the largest river in the European Arctic of Russia. In addition to metals, the particle size distribution and physicochemical parameters of river sediments were analyzed, such as the content of carbonates, organics and ash components. Average concentrations of heavy metals in the sediments of the Pechora Delta sediment have been found to be significantly lower than terrestrial values.

Assessing the natural and anthropogenic radionuclide activities of the Pechora River estuary: Bottom sediments and water (Arctic Ocean Basin).

This paper studies the activity of natural and technogenic radionuclides in bottom sediments and surface water of the Pechora River estuary, which is the largest Arctic river within the European part of Russia. The relevance of conducting radioecological studies of this region is associated with active oil and gas activities in the Pechora basin and the presence of potential sources of radiation hazard. The average activities of Cs, Ra, Th, and K in bottom sediments were 0.

Assessment of current natural and anthropogenic radionuclide activity concentrations in the bottom sediments from the Barents Sea.

The article is devoted to the study of the activity values of natural radionuclides K, Th and Ra and technogenic radionuclide Cs in the bottom sediments of the Barents Sea, which is distinguished from the rest of the Arctic seas by the fact that the largest number of radiation objects are concentrated here. The activity levels of natural radionuclides were within the range of activity values corresponding to marine sediments around the world. The highest radionuclide activities were found within the deepwater shelf of the Barents Sea.

Observation of a superfluid component within solid helium.

We demonstrate by neutron scattering that a localized superfluid component exists at high pressures within solid helium in aerogel. Its existence is deduced from the observation of two sharp phonon-roton spectra which are clearly distinguishable from modes in bulk superfluid helium. These roton excitations exhibit different roton gap parameters than the roton observed in the bulk fluid at freezing pressure.

[Clinical-pathologoanatomic analysis of post-operative thromboembolism of pulmonary artery].

Autopsy and clinical data were analysed for 803 surgical patients whose death was due to pulmonary artery thromboembolism (PAT). PAT was diagnosed intravitally in 32% of the deceased. 87% of the patients with PAT symptoms died within 2 hours.

[The iliac vein occlusion].

Basing on roentgenological and morphological investigations the causes of the iliac veins passability disorder were studied up. In 45.1% of observations the stenosis was revealed of the left and in 1.

[The clinical aspects of using thrombolytic therapy in myocardial infarct at the prehospital stage].

The examination of 80 patients with acute myocardial infarction has revealed that prehospital thrombolytic therapy (TT) allows it to be initiated significantly earlier by 2.9 hours, resulting in coronary reperfusion and ensuring more complete blood flow recovery than hospital therapy. The natural history of the disease is also more favourable when TT is used in the prehospital period.

[Errors in the diagnosis of tuberculosis in general hospitals].

Ninety-six lethal cases of tuberculosis overlooked in general hospitals of Minsk in 1983-1989 have been analyzed clinicopathologically. The examination in general hospitals provided intravital diagnosis of tuberculosis in 18% of the cases only. The largest proportion of the overlooked cases related to disseminated tuberculosis (69.

[Thrombolytic treatment of myocardial infarction at the prehospital and hospital stage].

Thrombolytic therapy was performed in 59 patients within the first hours of myocardial infarction. Twenty three patients (Group 1) were given streptokinase (SK) by an emergency team, 36 patients (Group 2) received SK following coronary angiography. In Group 1, SK was initiated earlier (p less than 0.

[Objective assessment of the treatment results in patients with disseminated spinal osteochondrosis].

The authors have investigated the possibility of objectivization of the treatment of the patients with osteochondrosis of the spine. 86 patients with spinal osteochondrosis and 149 patients with cervical osteochondrosis have been studied, all of whom were treated with variable vibromagnetic field and kinesitherapy. It has been established that the patients' tissues in the area of the biologically active points acquire diode properties (which normally are the electric current conductors).

[Morphological differentiation in non-sulfur purple bacteria].

Cell differentiation in non-sulphur purple bacteria is complicated, as compared to binary fission, during bud formation with production of hyphae and special resting cells of the exospore type, and can be demonstrated in the folowing series of microorganisms: Rhodopseudomonas sulfidophila leads to Rh. capsulata leads to Rh. acidophila leads to Rh.