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Article: Kartirovanie muzykal'nykh tsentrov golovnogo mozga vo vremya kraniotomii v soznanii.

Alekseev, I M / Zuev, A A

Zhurnal voprosy neirokhirurgii imeni N. N. Burdenko

2023 Volume 87, Issue 2, Page(s) 92–97

Abstract: Direct cortical stimulation during awake craniotomy with speech testing became the «gold standard» in brain mapping and preserving speech zones during neurosurgical procedures. However, there are many other cerebral functions, and their loss can be very ... ...

Title translation	Mapping the musician brain during awake craniotomy.
Abstract	Direct cortical stimulation during awake craniotomy with speech testing became the «gold standard» in brain mapping and preserving speech zones during neurosurgical procedures. However, there are many other cerebral functions, and their loss can be very critical for certain patients. For example, such a function is production and perception of music for musicians. This review presents the latest data on functional anatomy of musician brain, as well as aspects of neurosurgical treatment with awake craniotomy and music testing under brain mapping.
MeSH term(s)	Humans ; Brain Neoplasms/surgery ; Wakefulness/physiology ; Music ; Monitoring, Intraoperative/methods ; Craniotomy/methods ; Brain Mapping/methods ; Brain/surgery
Language	Russian
Publishing date	2023-04-03
Publishing country	Russia (Federation)
Document type	Review ; English Abstract ; Journal Article
ZDB-ID	603458-5
ISSN	0042-8817
ISSN	0042-8817
DOI	10.17116/neiro20238702192
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Article ; Online: Changes in the temperature of polymorphic transformations under the action of radiation.

Alekseev, I

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

2014 Volume 85, Page(s) 60–63

Abstract: Studies on transport processes of (46)Sc, (57)Со and (188)Re impurity atoms in irradiated and non-irradiated samples of metallic titanium, iron and tungsten have shown that the temperature of polymorphic transition depends on the degree of radiation ... ...

Abstract	Studies on transport processes of (46)Sc, (57)Со and (188)Re impurity atoms in irradiated and non-irradiated samples of metallic titanium, iron and tungsten have shown that the temperature of polymorphic transition depends on the degree of radiation damage of the metal and is "moved" to the region of higher temperatures due to the presence of large number of structural radiation defects that make the restructuring of the crystal lattice difficult.
Language	English
Publishing date	2014-02
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1142596-9
ISSN	1872-9800 ; 0883-2889 ; 0969-8043
ISSN (online)	1872-9800
ISSN	0883-2889 ; 0969-8043
DOI	10.1016/j.apradiso.2013.11.008
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Article: Khirurgicheskoe lechenie opukholei dopolnitel'noi motornoi oblasti.

Alekseev, I M / Zuev, A A

Zhurnal voprosy neirokhirurgii imeni N. N. Burdenko

2022 Volume 87, Issue 1, Page(s) 5–14

Abstract: After surgical treatment of tumors of the supplementary motor area (SMA) post-operative speech and/or motor neurological deficit may occur.: Objective: To determinate frequency and reversibility of such deficit and identify risk factors for its ... ...

Title translation	Surgical treatment of tumors of the supplementary motor area.
Abstract	After surgical treatment of tumors of the supplementary motor area (SMA) post-operative speech and/or motor neurological deficit may occur. Objective: To determinate frequency and reversibility of such deficit and identify risk factors for its development. Material and methods: We retrospectively analyzed postoperative outcomes in 34 patients with SMA tumors. Pre- and postoperative neurological status, localization of tumors, extent of resection relative to adjacent regions and relationship of tumor with white matter tracts were assessed. We also analyzed the influence of these factors on the risk of postoperative neurological impairment. Results: Postoperative neurological impairment occurred in 47% of cases. Complete or significant regression was observed in all patients within 5.7 month after surgery. Major risk factors were lesion of dominant hemisphere ( Conclusion: Surgery for SMA tumors is safe and followed by favorable functional outcomes.
MeSH term(s)	Humans ; Motor Cortex/diagnostic imaging ; Motor Cortex/surgery ; Brain Neoplasms/diagnostic imaging ; Brain Neoplasms/surgery ; Brain Neoplasms/pathology ; Retrospective Studies ; Glioma/surgery ; Speech Disorders/etiology ; Magnetic Resonance Imaging
Language	Russian
Publishing date	2022-12-19
Publishing country	Russia (Federation)
Document type	English Abstract ; Journal Article
ZDB-ID	603458-5
ISSN	0042-8817
ISSN	0042-8817
DOI	10.17116/neiro2023870115
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Article: Bezopasnost' robot-assistirovannoi implantatsii glubinnykh elektrodov dlya provedeniya invazivnogo stereo-EEG-monitoringa.

Alekseev, I M / Pekov, Zh Zh / Pedyash, N V / Zuev, A A

Zhurnal voprosy neirokhirurgii imeni N. N. Burdenko

2024 Volume 88, Issue 1, Page(s) 28–38

Abstract: Robot-assisted implantation of deep electrodes for stereo-EEG monitoring has become popular in recent years in patients with drug-resistant epilepsy. However, there are still few data on safety of this technique.: Objective: To assess the incidence of ...

Title translation	Safety of robot-assisted implantation of deep electrodes for invasive stereo-EEG monitoring.
Abstract	Robot-assisted implantation of deep electrodes for stereo-EEG monitoring has become popular in recent years in patients with drug-resistant epilepsy. However, there are still few data on safety of this technique. Objective: To assess the incidence of complications in patients with drug-resistant epilepsy undergoing robot-assisted implantation of stereo-EEG electrodes. Material and methods: We retrospectively studied the results of implantation of stereo-EEG electrodes in 187 patients with drug-resistant epilepsy. All patients underwent non-invasive preoperative examination (video-EEG, MRI, PET, SPECT, MEG). In case of insufficient data, stereo-EEG monitoring was prescribed. We determined electrode insertion trajectory using a robotic station and MR images. Implantation of electrodes was carried out using a Rosa robot (Medtech, France). All patients underwent invasive EEG monitoring after implantation. Results: There were 11.25±3 electrodes per a patient. Implantation of one electrode took 7.5±4.9 min. Postoperative MRI revealed electrode malposition in 2.3% of cases. None was associated with complications. The complication rate per electrode was 0.6%. Complications affected stereo-EEG monitoring only in 3 cases (1.6%). The mortality rate was 0.5%. Bilateral implantation ( Conclusion: Robot-assisted implantation of stereo-EEG electrodes is a safe procedure with minimal risk of complications. Rare electrode malposition does not usually affect invasive monitoring.
MeSH term(s)	Humans ; Robotics ; Stereotaxic Techniques ; Retrospective Studies ; Drug Resistant Epilepsy/diagnostic imaging ; Drug Resistant Epilepsy/surgery ; Electroencephalography/adverse effects ; Electroencephalography/methods ; Electrodes, Implanted/adverse effects
Language	Russian
Publishing date	2024-02-08
Publishing country	Russia (Federation)
Document type	English Abstract ; Journal Article
ZDB-ID	603458-5
ISSN	0042-8817
ISSN	0042-8817
DOI	10.17116/neiro20248801128
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Article: Soil organic carbon stocks and stability of organic matter in permafrost-affected soils of Yamal region, Russian Arctic

Alekseev, Ivan / Abakumov, Evgeny

Geoderma regional. 2022 Mar., v. 28

2022

Abstract: Chemical composition of soil organic matter determines its decomposability and may affect soil microbial activity. This is very important for understanding variability in soil organic carbon pools in context of changes in plant cover or climate. This ... ...

Abstract	Chemical composition of soil organic matter determines its decomposability and may affect soil microbial activity. This is very important for understanding variability in soil organic carbon pools in context of changes in plant cover or climate. This paper is aimed to characterize existing carbon pools and molecular organization of the humic acids, isolated from various permafrost-affected soils of Yamal region and to assess the potential vulnerability of soils organic matter in context of possible mineralization processes. Soils for most of studied sites were characterized predominantly by acidic to strong acidic pH. Profile distribution of carbon, nitrogen and C:N ratio showed non-gradual changing with the depth due to manifestation of cryopedogenesis in soil profiles which lead to cryogenic mass transfer. Mean soil organic carbon stocks for the study area were 7.9 ± 2.2 kg m⁻² (for 0–10 cm layer), 15.0 ± 5.5 kg m⁻² (for 0–30 cm), 24.0 ± 8.0 kg m⁻² (for 0–100 cm). Analysis of soil organic carbon stocks among predominant soil types (Russian soil classification system) revealed relatively high variability of values in 0–10 cm (from 4.5 kg m⁻² in Peaty Gleyzem underlain by permafrost to 9.6 kg m⁻² in Peaty Podzol underlain by permafrost) and 0–30 cm layers (from 9.9 kg m-2 in Cryic Podbur underlain by permafrost to 24.1 kg m⁻² in eutrophic peat soil underlain by permafrost). Results of solid-state ¹³C NMR spectrometry showed low amounts of aromatic fragments in studied soils. All studied soils are characterized by predominance of aliphatic structures, and also carbohydrates, polysaccharides, ethers and amino acids. High content of aliphatic fragments in studied humic acids shows their similarity fulvic acids. Low level of aromaticity reflects the accumulation in soil of poorly decomposed organic matter due to cold temperatures. Our results provide further evidence of high vulnerability and sensitivity of permafrost-affected soils organic matter to Arctic warming. Consequently, these soils may play a crucial role in global carbon balance under effects of climate warming.
Keywords	Podzols ; carbon nitrogen ratio ; climate ; cold ; eutrophication ; mass transfer ; microbial activity ; mineralization ; nitrogen ; pH ; peat soils ; permafrost ; polysaccharides ; soil classification ; soil organic carbon ; Arctic region
Language	English
Dates of publication	2022-03
Publishing place	Elsevier B.V.
Document type	Article
ISSN	2352-0094
DOI	10.1016/j.geodrs.2021.e00454
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Correction to: Polycyclic Aromatic Hydrocarbons, Mercury and Arsenic Content in Soils of Larsemann Hills, Pravda Coast and Fulmar Island, Eastern Antarctica.

Alekseev, Ivan / Abakumov, Evgeny

Bulletin of environmental contamination and toxicology

2021 Volume 106, Issue 4, Page(s) 558

Language	English
Publishing date	2021-02-06
Publishing country	United States
Document type	Published Erratum
ZDB-ID	6895-0
ISSN	1432-0800 ; 0007-4861
ISSN (online)	1432-0800
ISSN	0007-4861
DOI	10.1007/s00128-021-03128-4
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Article ; Online: Polycyclic Aromatic Hydrocarbons, Mercury and Arsenic Content in Soils of Larsemann Hills, Pravda Coast and Fulmar Island, Eastern Antarctica.

Alekseev, Ivan / Abakumov, Evgeny

Bulletin of environmental contamination and toxicology

2021 Volume 106, Issue 2, Page(s) 278–288

Abstract: This study is aimed at investigation of various potential contaminants (arsenic, mercury and polycyclic aromatic hydrocarbons) content in soils of different landscapes of Eastern Antarctica ice-free areas. Our data not only showed that intensive human ... ...

Abstract	This study is aimed at investigation of various potential contaminants (arsenic, mercury and polycyclic aromatic hydrocarbons) content in soils of different landscapes of Eastern Antarctica ice-free areas. Our data not only showed that intensive human impact might result in significant direct contamination of surrounding landforms, but also revealed a specific role of ornithogenic transport in distribution of contaminants. Analysis revealed that the contents of investigated elements were 0.100-8.055 mg kg
MeSH term(s)	Antarctic Regions ; Arsenic ; Ecosystem ; Environmental Monitoring ; Humans ; Islands ; Mercury ; Polycyclic Aromatic Hydrocarbons/analysis ; Soil ; Soil Pollutants/analysis
Chemical Substances	Polycyclic Aromatic Hydrocarbons ; Soil ; Soil Pollutants ; Mercury (FXS1BY2PGL) ; Arsenic (N712M78A8G)
Language	English
Publishing date	2021-01-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	6895-0
ISSN	1432-0800 ; 0007-4861
ISSN (online)	1432-0800
ISSN	0007-4861
DOI	10.1007/s00128-020-03063-w
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Article ; Online: Content of Trace Elements in Soils of Eastern Antarctica: Variability Across Landscapes.

Alekseev, Ivan / Abakumov, Evgeny

Archives of environmental contamination and toxicology

2021 Volume 80, Issue 2, Page(s) 368–388

Abstract: Although Antarctica is considered one of the most pristine areas on Earth, an accelerating human presence in this remote continent, such as scientific operations and functioning of numerous scientific stations, logistics, and tourism activities, has ... ...

Abstract	Although Antarctica is considered one of the most pristine areas on Earth, an accelerating human presence in this remote continent, such as scientific operations and functioning of numerous scientific stations, logistics, and tourism activities, has increased the risks of environmental impacts in recent decades. During the 63rd Russian Antarctic expedition, 42 samples from topsoil horizons were collected from Larsemann Hills, Mirny station, and Fulmar Island, Eastern Antarctica. The purpose of this work was to analyze the accumulation levels 8 trace elements and to assess possible environmental risks associated with contamination of Antarctic soils. Various human activities have been found to be responsible for increase of metal levels in studied Antarctic environments. Our study also revealed a specific role of ornithogenic factor and moss cover in distribution of contaminants in severe conditions of Eastern Antarctica soils. Ornithogenic soils were characterized by higher rates of accumulation of some trace metals and metalloids (especially zinc and copper) compared with other investigated "pristine" sites without significantly visible traces of guano inputs. In general term, obtained geoaccumulation index for trace elements in all samples were under or slightly above the 0 level, indicating low to moderate pollution of the studied soils. Results of principal component analysis revealed the necessity for further detailed research on interactions of trace metals with soil organic matter for better understanding of their biogeochemistry in the Antarctic environment. Although most of contaminated sites were found in anthropogenically affected areas, accumulation of some elements in guano-derived and moss materials were associated with higher values for soil pollution indices in natural soils, as well.
MeSH term(s)	Antarctic Regions ; Copper/analysis ; Environmental Monitoring ; Environmental Pollution/analysis ; Humans ; Islands ; Metals/analysis ; Russia ; Soil/chemistry ; Soil Pollutants/analysis ; Trace Elements/analysis ; Zinc/analysis
Chemical Substances	Metals ; Soil ; Soil Pollutants ; Trace Elements ; Copper (789U1901C5) ; Zinc (J41CSQ7QDS)
Language	English
Publishing date	2021-01-21
Publishing country	United States
Document type	Journal Article
ZDB-ID	185986-9
ISSN	1432-0703 ; 0090-4341
ISSN (online)	1432-0703
ISSN	0090-4341
DOI	10.1007/s00244-021-00808-4
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Article: Assessment of soil electrical properties in selected agricultural soils of Puchuncavi, central Chile

Alekseev, I. / Abakumov, E.

Agriculture

2020 Volume 66, Issue 2, Page(s) 67

Document type	Article
ZDB-ID	772282-5
ISSN	0551-3677
Database	Current Contents Nutrition, Environment, Agriculture

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Article: Polycyclic Aromatic Hydrocarbons, Mercury and Arsenic Content in Soils of Larsemann Hills, Pravda Coast and Fulmar Island, Eastern Antarctica

Alekseev, Ivan / Abakumov, Evgeny

Bulletin of environmental contamination and toxicology. 2021 Feb., v. 106, no. 2

2021

Abstract	This study is aimed at investigation of various potential contaminants (arsenic, mercury and polycyclic aromatic hydrocarbons) content in soils of different landscapes of Eastern Antarctica ice-free areas. Our data not only showed that intensive human impact might result in significant direct contamination of surrounding landforms, but also revealed a specific role of ornithogenic transport in distribution of contaminants. Analysis revealed that the contents of investigated elements were 0.100–8.055 mg kg⁻¹ (arsenic), 0.025–0.027 mg kg⁻¹ (mercury) in Larsemann Hills and 0.100–1.213 mg kg⁻¹ (arsenic), 0.023–0.593 mg kg⁻¹ (mercury) in vicinities of Mirny station and Fulmar Island. Accumulation of some elements in guano-derived and moss materials lead to higher values of other soil pollution indices at natural sites. Results of our study revealed the predominance of light molecular weight PAHs (fluorene and acenaphthylene) in studied soils. Results of our study are not completely in agreement with the idea of an practically uncontaminated Antarctic ecosystem which was previously reported for Eastern Antarctica ice-free areas. Various human activities carried out at local scale have been found to be responsible for increase of metal levels in studied Antarctic environments.
Keywords	Fulmarus ; anthropogenic activities ; arsenic ; coasts ; ecosystems ; fluorenes ; humans ; mercury ; molecular weight ; mosses and liverworts ; soil pollution ; toxicology ; Antarctic region ; Antarctica
Language	English
Dates of publication	2021-02
Size	p. 278-288.
Publishing place	Springer US
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	6895-0
ISSN	1432-0800 ; 0007-4861
ISSN (online)	1432-0800
ISSN	0007-4861
DOI	10.1007/s00128-020-03063-w
Database	NAL-Catalogue (AGRICOLA)

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