Assessment of water supply to the east European arctic agglomeration from groundwater, taking into account their quality and health risks.

The purpose of the study is to assess the possibilities of using groundwater for water supply in the East European Arctic agglomeration based on an assessment of their quality and health risks. For this purpose, high-precision determinations of the complete macro- and microcomponent composition were carried out in sixty-six water samples taken from wells up to 180 m deep. It was found that in some samples the concentrations of Na+, Fe, B, Ba, Mn and U exceeded WHO standards.

[Sir Charles Bell (1774-1842) and his contribution to neurology (the 250th anniversary of the birth)].

Sir Charles Bell (1774-1842) is Scottish physiologist, surgeon, artist, philosopher and anatomist. Throughout his professional career, Charles Bell made a number of important discoveries and published a large number of scientific papers. Bell first presented a detailed description of the clinical picture of facial palsy (later named after him) and a number of other neurological disorders, as well as important information about referred pain and reciprocal inhibition.

Time regularities of strontium concentration in drinking groundwater distant from the sea coast.

This paper confirms the regularities of the formation of increased concentrations of strontium (Sr) in fresh groundwater used for drinking water supply, depending on the time they are residen in the carbonate deposits of the aquifer. On average, every thousand years, the Sr concentration increases by 2.1-3.

Distribution of trace metals and an environmental risk assessment of the river sediments in the area of the Lomonosov diamond deposit (NW Russia).

This article is devoted to the study of trace metals in the bottom sediments of watercourses in the area of the developed Lomonosov diamond deposit, which is the largest industrial diamond deposit in Europe. Samples of river sediments were taken from the Zolotitsa River and all its tributaries in the area of the diamond deposit. In addition, samples of kimberlites and rocks were selected from the quarries.

Using stable isotopes to assess river water dynamics and groundwater input in the largest European Arctic river (Severnaya Dvina).

Rivers play a key role in the water cycle on the earth via integrating all hydrological channels to return terrestrial precipitations back to the oceans. In addition, rivers, together with groundwater, are powerful transformers of the surface lithosphere, responsible for chemical weathering of rocks and the removal of solute into the ocean. Tracing the dynamics of surface water and groundwater versus atmospheric feeding of rivers presents important issues in Arctic regions due to the ongoing change of the structure of hydrological runoff.

Transformation of the radionuclides composition of river sediments in the area of the exploited Lomonosov diamond deposit (NW Russia).

The article is devoted to the study of the activity of the natural radionuclides K, Th, Ra and technogenic Cs radionuclide in the river sediments of watercourses around the Lomonosov diamond deposit (northwestern Russia). This is the only large diamond mining and beneficiation complex in Europe. Samples of river sediments and surface waters were taken from the Zolotitsa River and its tributaries in the area of the diamond deposit.

Criteria for Selecting the Optimal Method of Treating Hepatic Hemangiomas.

Unlabelled: was to develop criteria for optimal tactics of treating hepatic hemangiomas of various sizes and localization including endovascular, percutaneous puncture ablative, and open resection interventions.

Materials And Methods: The results of treating 95 patients (65 women and 30 men aged 26-65 years) with hepatic hemangiomas have been analyzed. Tumor diagnosis was based on the data of echosonoscopy, MRI, multispiral computed tomography with intravenously injected contrasting medium, US dopplerography, and puncture biopsy.

[The history of the discovery of Gasserian ganglion].

The article presents in detail the history of the discovery of the trigeminal ganglion in the context to name it Gasserian ganglion. The historical, formal and logical methods of research, along with system analysis were used in the work. An in-depth research of little-known literature sources, which included scientific, publicistic and fiction components, was conducted.

[Early infantile epileptic encephalopathy type 14: three cases of epilepsy in infancy with migrating focal seizures due to KCNT1 mutations].

Objective: To study clinical and neurophysiological data of early infantile epileptic encephalopathy type 14 caused by KCNT1 mutations.

Material And Methods: For the period 2017 to 2019, 3 non-relative girls with clinical characteristics of epilepsy of infancy with migrating focal seizures (EIMFS) and mutations in the KCNT1 gene are identified and studied. DNA sequencing was performed using the Hereditary epilepsy panel (Next Generation Sequencing on platform IlluminaNextSeq 500, USA).

[Familial temporal lobe epilepsy 5 with vestibular seizures (a case report)].

A clinical case of familial temporal epilepsy type 5 (OMIM 614417) with onset at the age of 14 years is described for the first time in the domestic literature. The leading manifestations of the disease were focal seizures of systemic vertigo, accompanied by vestibular ataxia and, sometimes, vomiting. Cognitive and emotional disturbances were observed as well.

Transformation of the chemical composition of surface waters in the area of the exploited Lomonosov diamond deposit (NW Russia).

The specific objective of this study was to investigate the changes in the chemical composition of river waters during the exploitation of the Lomonosov diamond deposit and the danger of these changes for the ichthyofauna. It was found that the Ca-HCO composition of river water both upstream and downstream from the quarry was almost identical before discharge of the drainage waters into the river. In subsequent years, the water downstream from the quarry acquired a Na-HCO composition, and then a Na-HCO-Cl composition and TDS increased by 2.

Evolution of groundwater chemistry in coastal aquifers of the south-eastern White Sea area (NW Russia) using C and U-U dating.

The specific objectives of the study are to clarify the sources and characteristics of groundwater in the aquifers along the coast of the White Sea in northwestern Russia, and on this basis to perform a broad C and U/U dating of all their types, taking into account the mixing processes. Investigation of an evolution of the groundwater chemistry revealed that the main evolutionary trends are the following: (1) Mixing Late Pleistocene brackish water end member (brackish1) and Mikulino seawater end member with strongly brackish and salty water in the Vpd aquifer (salty Vpd) formation. Groundwater dating showed the "brackish1" residence time in the aquifer of 32.

Study of isotopes of carbon, thorium, and uranium in travertine and thermal spring samples: implications for effects of changes in geochemical environment and processes.

Data on modern radiocarbon activity in the old travertine formations of the Pymvashor hydrothermal system were used, in combination with Th/U dating of the travertine, to estimate the C contents of the total dissolved inorganic carbon in the ancient thermal water at the time of precipitation of the travertine (C). With the known values of C and average age of the thermal water, and under the assumption that the residence time of the water in aquifer was constant over the last 13.9 ± 1.

[The criteria of early detection of biotinidase deficiency-based epilepsy].

Objective: An analysis of clinical and paraclinical symptomatology of three cases of infant epilepsy due to biotinidase deficiency is presented.

Material And Methods: The diagnosis took 4 months in the first case and 1 day in the last one.

Results And Conclusion: It is emphasized that early diagnosisbased on knowing the reference signs of this inherited metabolic disease provides an opportunity to avoid patient's disability or death.

Estimation of uranium migration parameters in sandstone aquifers.

The chemical composition and isotopes of carbon and uranium were investigated in groundwater samples that were collected from 16 wells and 2 sources in the Northern Dvina Basin, Northwest Russia. Across the dataset, the temperatures in the groundwater ranged from 3.6 to 6.

[Non-convulsive status epilepticus with a phenomenon of transitory amnesia].

This article describes clinical cases of 13 year old boy with two non-convulsive status epilepticus which had transient epileptic amnesia as a clinical implication. Status EEG pattern in form of diffuse epileptic activity "benign epileptiform discharge of childhood" type was registered.

Mortality prediction in patients with dialysis-dependent acute kidney injury after cardiac surgery with cardiopulmonary bypass.

Background: To build a predictive model for patients with dialysis-dependent acute kidney injury (AKI-D) after cardiac surgery with the cardiopulmonary bypass (CPB), according to disease severity.

Methods: A single-centre, retrospective cohort study was performed to determine the demographic and clinical parameters (including the specific factor, CPB duration) for risk of poor outcome in patients requiring RRT after cardiac surgery with CPB. A new model was built for mortality prediction in these patients on the basis of the identified risk factors and Sequential Organ Failure Assessment score.

[Intensive care of traumatic brain injury in children].

Traumatic brain injury among other injuries of human body reaches up to 30-50% and, according to the WHO, it grows by 2%. Severe traumatic brain injury (such as severe brain contusion, epidural, subdural and intracerebral hematoma, intracerebral hygroma, diffuse axonal injury) in the structure of general trauma amounts 4-20%. The prognosis of traumatic brain injury mainly depends on the timeliness of the first aid.

Laser-induced fluorescence and X-ray spectral analysis of carious process in hard dental tissues.

Morphological and spectral X-ray analysis of carious and noncarious extracted teeth showed the patterns of dentin ossification in caries of different degree. Parietal ectopic ossification of the canal and cavity lumens in stages III and IV dental caries is regarded as a specific structural marker of pathological regeneration. The X-ray spectral analysis showed that the progress of carious process is paralleled by loss of mineral components.

Morphological evaluation of cytoarchitectonics of aortic graft at the biotechnological stage with analysis of changes in laser-induced fluorescence spectra.

We performed a fluorescent microscopic examination of human and animal aortic grafts at different stages of decellularization. Treatment of aortic grafts with trypsin/EDTA solution for 48 h leads to their complete decellularization and preserved the connective tissue fiber backbone, which gains a netlike structure. The use of this protocol of decellularization leads to disappearance of subintimal calcium deposits in human aortic grafts.

[Thrombocytosis after splenectomy in children].

A comparative analysis of certain hematological indices was made in 50 children with traumatic injuries of the spleen. Splenectomy was fulfilled in 29 patients, organ-sparing treatment in 21 patients. There were no lethal outcomes.

Influence of mineral components on laser-induced fluorescence spectra of calcified human heart-valve tissues.

Laser-induced fluorescence (LIF) spectra of calcified human heart-valve tissue and LIF spectra of macroscopic calcinosis fragments dissected from human heart valves were compared with LIF spectra of pig myocardium tissues. Excitation was provided by an excimer laser with wavelength lambda = 248 nm. Fluorescence bands that were due to mineral and organic tissue components were identified by measurement of LIF spectra of macroscopic fragments of calcified tissues that had been heat treated at 700 degrees C.

[Effects of indirect electrochemical oxidation of blood on certain indices of homeostasis in surgical patients].

An analysis of certain biochemical hematological and hemostasiological indices of blood of 41 patients has shown that an intravenous injection of sodium hypochlorite with concentration 300 mg/l has a marked detoxicating and hypocoagulating effect.