scholarly journals Mobile forms of metals in soils in the Nadym-Pur interfluve (Western Siberia)

2020 ◽  
pp. 136-145
Author(s):  
E. A. Romanenko ◽  
D. V. Moskovchenko ◽  
A. A Kudryavtsev ◽  
G. N. Shigabaeva
Keyword(s):  
Metal Content ◽  
Western Siberia ◽  
Total Content ◽  
Fluorescence Analysis ◽  
West Siberia ◽  
Taiga Zone ◽  
Fe Content ◽  
Mobile Forms ◽  
Northern Regions ◽  
Accumulation Of Metals

The total concentrations of metals (Fe, Mn, Cu, Ni, Cr, Sr) and their mobile forms extracted by an ammonium acetate buffer (pH = 4,8) were studied in soils samples collected from Nadym-Pur interfluve (West Siberia), near the northern limit of the taiga zone. The heavy metal content was determined in 55 background soil samples and in 25 pyrogenic ones. Gross content was determined on a spectrometer "SPECTROSCAN MAX-GV" using X-ray fluorescence analysis. Mobile forms of metals were determined on a ContrAA 700 atomic absorption spectrometer by flame and electrothermal methods. The statistics are calculated using the Excel software package. The study confirmed the weak accumulation of metals in the soils of the northern regions of Western Siberia. The total content below the soil world average for Fe is 5 times, Mn – 3 times, Sr – 2 times, Cr – 1,4 times. The content of mobile forms varies widely depending on the amount of organic matter. The percentage of mobile forms of metals from the total content was: Cr – 0.84%, Fe – 1,2%, Sr – 3,8%, Mn – 8,7%, Ni – 15%. In the profile of podzols, the distribution of mobile forms of metals has an eluvial-illuvial character. Mn and Sr accumulate intensively in the surface organogenic horizons, and the Fe content increases in the BF horizon. Minimum values are marked in horizon E. In pyrogenic soils, there is an increase in the content of mobile forms of metals due to the intake of ash. Metal content usually not exceeded the maximal permissible concentrations for soils.

(A review) E. D. Lapshina. The bog vegetation of the south-east West Siberia: monograph. Novosibirsk, 2010. 186 p.

2012 ◽  
pp. 135-138
Author(s):  
B. M. Mirkin ◽  
L. G. Naumova ◽  
E. Z. Baisheva ◽  
V. B. Martynenko
Keyword(s):  
Western Siberia ◽  
West Siberia ◽  
The South ◽  
Large White ◽  
White Spots ◽  
Northern Regions ◽  
Floristic Classification ◽  
East West ◽  
Vast Territory

Progress floristic classification of the vegetation of Russia is obvious (Mirkin, Ermakov, 2010; Mirkin, Naumova, 2011). However, in the vast territory of the country are still many «white spots», vegetation which syntaxonomically not been studied. One of these large «white spots» — the vegetation of the bogs. For years, the «monopolist» in ecologo-floristic classification of wetlands was V. A. Smagin (student major Soviet bolotoved M. S. Boch). He studied the vegetation of wetlands of the Northern regions of the European taiga and the basin of Myriagon Surgut Polesie (Smagin, 1998, 2000, 2003, etc.). Peer-reviewed monograph on the vegetation of mires in Western Siberia can be considered as a breakthrough in the syntaxonomy of this type of vegetation. Moreover, as a result of the work of E. D. Lapshina picture of syntaxonomy of bog vegetation has changed so much that one can speak about a kind of «syntaxa of the revolution».

scholarly journals Climate-related changes in the vegetation cover of the taiga and tundra of Western Siberia in 1982–2015 according to satellite observations

2019 ◽  
pp. 66-76
Author(s):  
V. V. Zuev ◽  
E. M. Korotkova ◽  
A. V. Pavlinsky
Keyword(s):  
Air Temperature ◽  
Western Siberia ◽  
Correlation Coefficients ◽  
Warm Period ◽  
Taiga Zone ◽  
Tundra Zone ◽  
Average Temperature ◽  
Temperature Trends ◽  
First Case ◽  
Northern Regions

The paper considers the results of the trend and correlation analysis of air temperature and vegetative index NDVI for the warm period for the territory of taiga and tundra of Western Siberia in 19822015. It was revealed that with significant ( = 0.05) positive air temperature trends in some months of the spring-summer period, both for the taiga zone and for the tundra zone, a significant increase in NDVI is observed. The trends of air temperature and NDVI for the taiga and tundra zones from April to October 19822015 have been calculated and the unevenness of their spatial distribution over the territory under consideration is shown. It is revealed that the development of vegetation in the warm period is largely determined by its development in the first month of the warm period May for taiga and June for tundra. It is shown that the NDVI value in May in the taiga zone is formed under the influence of April-May temperatures, and in June in the tundra zone under the influence of June temperatures; significant NDVI correlation coefficients with the average temperature of April-May and May-June are characteristic of practically the entire territory of the region, with the exception of the coastal northern regions in the first case and the south-western regions in the second.

Development of software and hardware complex of operative diagnostics of structural part of 35-220 kV overhead lines operated in Northern regions of Western Siberia

2018 ◽  
pp. 69-77
Author(s):  
S. V. Grigorieva ◽  
A. V. Olshansky
Keyword(s):  
Western Siberia ◽  
Technical Condition ◽  
Structural Part ◽  
Software Complex ◽  
Overhead Lines ◽  
Far North ◽  
Hardware Complex ◽  
Northern Regions ◽  
Software And Hardware ◽  
Overhead Power Lines

The article is devoted to the problems of maintenance of overhead power lines in the Far North of Western Siberia. For improvement of quality and reliability of power supply of consumers in the conditions of the Far North of Western Siberia, decrease in operational costs and volumes of the carried-out emergency works the hardware-software complex for expeditious inspection, assessment and forecasting of change of technical condition of constructive part of air lines (VL) of 35-220 kV is developed, the structure of the hardware-software complex of registration of the condition of constructive part of VL of 35-220 kV and structure of the hardware-software complex of storage., processing and analysis of the obtained data on the States of the constructive part of the VL 35-220 kV. 

scholarly journals The Multiscale Monitoring of Peatland Ecosystem Carbon Cycling in the Middle Taiga Zone of Western Siberia: The Mukhrino Bog Case Study

Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 824
Author(s):  
Egor Dyukarev ◽  
Evgeny Zarov ◽  
Pavel Alekseychik ◽  
Jelmer Nijp ◽  
Nina Filippova ◽  
...  
Keyword(s):  
Carbon Cycling ◽  
Western Siberia ◽  
Carbon Accumulation ◽  
Middle Taiga ◽  
Taiga Zone ◽  
Field Station ◽  
Moss Species ◽  
Chamber Method ◽  
The Impact

The peatlands of the West Siberian Lowlands, comprising the largest pristine peatland area of the world, have not previously been covered by continuous measurement and monitoring programs. The response of peatlands to climate change occurs over several decades. This paper summarizes the results of peatland carbon balance studies collected over ten years at the Mukhrino field station (Mukhrino FS, MFS) operating in the Middle Taiga Zone of Western Siberia. A multiscale approach was applied for the investigations of peatland carbon cycling. Carbon dioxide fluxes at the local scale studied using the chamber method showed net accumulation with rates from 110, to 57.8 gC m−2 at the Sphagnum hollow site. Net CO2 fluxes at the pine-dwarf shrubs-Sphagnum ridge varied from negative (−32.1 gC m−2 in 2019) to positive (13.4 gC m−2 in 2017). The cumulative May-August net ecosystem exchange (NEE) from eddy-covariance (EC) measurements at the ecosystem scale was −202 gC m−2 in 2015, due to the impact of photosynthesis of pine trees which was not registered by the chamber method. The net annual accumulation of carbon in the live part of mosses was estimated at 24–190 gC m−2 depending on the Sphagnum moss species. Long-term carbon accumulation rates obtained by radiocarbon analysis ranged from 28.5 to 57.2 gC m−2 yr−1, with local extremes of up to 176.2 gC m−2 yr−1. The obtained estimates of various carbon fluxes using EC and chamber methods, the accounting for Sphagnum growth and decomposition, and long-term peat accumulation provided information about the functioning of the peatland ecosystems at different spatial and temporal scales. Multiscale carbon flux monitoring reveals useful new information for forecasting the response of northern peatland carbon cycles to climatic changes.

scholarly journals ENERGY DISPERSION X-RAY FLUORESCENCE ANALYSIS FOR ENVIRONMENT PROTECTION

2005 ◽  
Vol 1 ◽  
pp. 214
Author(s):  
Eduards Valbahs ◽  
Aleksanders Sokolovs ◽  
Zigmārs Strūve
Keyword(s):  
Environmental Monitoring ◽  
Metal Content ◽  
Fluorescence Analysis ◽  
Field Conditions ◽  
Environment Protection ◽  
Energy Dispersion ◽  
Sensitive Analysis ◽  
X Ray ◽  
Pollution Levels ◽  
Change Tendency

Environmental monitoring is aimed mostly at pollution levels change tendency estimation and high sensitive analysis methods are applied for this purpose. X-Ray fluorescence analysis (RFA) allows getting information of metal content in ten or hundred seconds. The analyzers with Si(Li) detectors were used for measurements. Our report deals with some examples which are given as new RFA methods (with secondary target) application in the laboratory and field conditions.

scholarly journals IMMUNOCHEMICAL ANALYSIS OF RECOMBINANT CHIMERIC POLYPEPTIDE OspCgar+afz OF BORRELIA GARINII AND B. AFZELIIISOLATES

2016 ◽  
pp. 37-44
Author(s):  
VS. .. Karavaev ◽  
E. S. Oleinikova ◽  
M. Sh. Azaev ◽  
A. B. Beklemishev'
Keyword(s):  
Recombinant Proteins ◽  
Western Siberia ◽  
West Siberia ◽  
Amino Acid Sequences ◽  
Borrelia Garinii ◽  
Test Systems ◽  
Antigenic Activity ◽  
Escherichia Coli Cells ◽  
Antigenic Properties ◽  
Chimeric Polypeptide

Aim. Comparative study of antigenic properties of recombinant proteins OspCgar and OspCafz and recombinant chimeric polypeptide OspCgar+afZ, that contains amino acid sequences of mature immune dominant OspC proteins of West-Siberian isolates of Borrelia garinii (OspCgar) and B. afzelii (OspCafz), and evaluation of possibility of their use as antigens during creation of test-systems for serodiagnostics of Lyme borreliosis (LB) on the territory of Western Siberia. Materials and methods. Recombinant chimeric polypeptide OspCgar+afz and recombinant mature proteins OspCgar and OspCafz, obtained by expression of the corresponding genes in Escherichia coli cells, purified by affinity chromatography in Ni-NTA-sepharose CL-6B and studied by EIA method for the ability to bind antibodies from sera of LB patients. Results. A difference in sensitivity of determination by EIA method of specific IgM and IgG against borreliae in blood sera of LB patients with localized stage of the disease during use of OspCgar, OspCafz and OspCgar+afZ chimera as antigens was shown. Chimeric antigen OspCgar+afz was established to show higher antigenic activity compared with each of the OspCgar or OspCafZ antigens separately. Conclusion. The results of the study allow to examine the recombinant chimeric polypeptide OspCgar+afz as a possible component during creation of test-systems for serodiagnostics of LB on the territory of West Siberia.

scholarly journals Analysis of the material culture and new radiocarbon dating of the Early Neolithic site of Amnya I

2019 ◽  
Vol 8 (2) ◽  
pp. 149-159
Author(s):  
Ekaterina Nikolaevna Dubovtseva ◽  
Lubov Lvovna Kosinskaya ◽  
Henny Piezonka
Keyword(s):  
Material Culture ◽  
Western Siberia ◽  
Northern Taiga ◽  
Taiga Zone ◽  
Early Neolithic ◽  
Neolithic Site ◽  
Relative Chronology ◽  
The One ◽  
Technological Analysis ◽  
Khanty Mansi Autonomous

The ancient fortified settlement of Amnya I is a unique Early Neolithic site in the northern taiga zone of Western Siberia (Khanty-Mansi Autonomous Okrug, the Amnya river). It is located on a promontory and has three lines of defense and ten dwelling depressions. The structures of the excavated dwellings are very similar, though the artifact assemblage appears rather heterogeneous. We carried out a technical and technological analysis of ceramics, which showed no correlation between the texture, on the one hand, and the morphology and ornamentation of pots on the other one. Planiographic analysis of ceramics showed that vessels with comb and incising patterns are found in different dwellings, although there are objects in which both groups lie together. Various categories of stone implements (bladelets and polished arrowheads) also appear on different parts of the settlement. Most likely, the observed differences in the artefact complexes of objects are associated with the stages of the functioning of the settlement. The absolute chronology does not yet clarify the sequence of erection and existence of objects. New AMS date is probably vulnerable to a significant reservoir effect. The abundance of unsolved issues of absolute and relative chronology makes the resumption of research on this unique site urgent.

Determination of the content of heavy metals in soils and plants of urban ecosystems (Kaliningrad, Russia)

2021 ◽  
Author(s):  
Nataliia Chupakhina ◽  
Pavel Maslennikov ◽  
Pavel Feduraev ◽  
Luba Skrypnik ◽  
Galina Chupakhina
Keyword(s):  
Urban Environment ◽  
Woody Plants ◽  
Urban Soils ◽  
Agricultural Landscape ◽  
Fluorescence Analysis ◽  
Soil Samples ◽  
Soil Horizon ◽  
X Ray ◽  
Accumulation Of Metals ◽  
Maximum Content

<p>The purpose of this work is to investigate the accumulation of metals in urban soils of the main geochemical landscapes of the urban environment and in plants growing in these areas. The paper presents the results of a study of the accumulation of metals (Cu, Pb, As, Co, Cr, V, Zn, Mn, Sr, Ni, Ca, Fe) in the accumulative soil horizon of the main functional zones of Kaliningrad (agricultural landscape, residential, industrial and municipal). As a control, we used the landscape of recreation and recreation. The accumulation of elements in the soil and leaves of plants during the growing season and calendar period (year) was studied. The content of TM was determined in the leaves of woody, shrubby and herbaceous plants (22 species) of the urban environment of the city of Kaliningrad.</p><p>The metal content in the samples was determined by X-ray fluorescence analysis on the Spectroscan Max-G device. Soil samples were taken from the upper accumulative horizon with a thickness of 0 to 10 cm by the envelope method. The content of TM in the samples was determined by X-ray fluorescence analysis on the device " Spectroscan Max-G "("Spektron", Russia). Soil samples for analysis were prepared in accordance with the M049-P/10 method.</p><p>In urban soils, a significant excess of background concentrations of lead, manganese, zinc, copper, strontium and nickel (Pb>Cu>Zn>Mn>Sr>Ni) was found. The maximum content of pollutants in urban soils was observed in industrial and residential multi-storey areas with increased transport load. It is shown that the pH of the soil has the greatest influence on the distribution of metals in the accumulative horizon.</p><p>The absorption of elements by plants is species-specific. The highest total level of metals (Mn, Fe, Zn, Sr, Br, Rb) was observed in the leaves of woody plants: holly maple, hanging birch and heart-shaped linden. Of the studied elements, the plants most accumulated manganese and iron. The accumulation of manganese in the leaves is more characteristic of woody plants than of shrubs or grasses. The maximum content of Mn was found in the leaves of holly maple (79.5%), in the leaves of other plants, manganese accumulated significantly less actively (2.7 - 35.6%). The predominant accumulation of iron was observed in the leaves of white clover, wrinkled rose and crowned chub, its content in the leaves was 81.0—83.8 %. Among woody species, the maximum concentration of iron was found in the leaves of heart-shaped linden (69.9 %) and hanging birch (53.4%). Among the species that actively accumulate Zn — black poplar (32.5 %), in the leaves of other plants, the zinc content is 2.2 — 16.8% of the total pollutants. The highest content of strontium was found in samples of meadow clover (19.1 %), in the leaves of other plants the proportion of metal was significantly lower (1.8—11.4%). Analysis of the accumulation of metals in the leaves of the studied plants revealed a positive correlation between the content of Fe and Sr (r = 0.71).</p><p> </p>

scholarly journals Mobile Forms of Gold and Pathfinder Elements in Surface Sediments at the Novye Peski Gold Deposit and in the Piilola Prospecting Area (Karelia Region)

Minerals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 34 ◽  
Author(s):  
Vera Korshunova ◽  
Marina Charykova
Keyword(s):  
Organic Matter ◽  
Gold Deposit ◽  
Surface Sediments ◽  
Gold Mineralization ◽  
Total Content ◽  
Fulvic Acids ◽  
Water Soluble ◽  
Mobile Form ◽  
Mobile Forms ◽  
Pathfinder Elements

The success of prospecting for gold deposit in overburdened areas based on the using of secondary dispersion haloes mostly depends on the chosen method of geochemical survey (sampling horizon, sample preparation for analysis, etc.). At the same time, the geochemistry of gold in the supergene zone is insufficiently studied, especially it’s migration and concentration in association with other elements in surface sediments due to weathering of gold-bearing ore. The main aim of the study presented in this paper is the determination of mobile forms of gold and pathfinder elements (As, Cu, Ni, Ag, Zn, Pb, Se, Sb, Mo, Bi, and Te) in podzol soil and moraine in the areas of Karelia region with known gold mineralization. As a result of conducted experiments it was determined that the main mobile forms of gold are water-soluble and bound to organic matter, while pathfinder elements bound preferably to Fe and Mn(hydr)oxides and to organic matter. As gold and some pathfinders bind with organic matter, this form was considered in more detail, and the elements’ interaction with humic and fulvic acids was investigated. In addition, it was determined that the studied elements are quite “mobile” because the percentage of the mobile form in their total content was mostly more than 50%. The main features of the elements’ migration and concentration were identified in surface sediments of the study areas.

Sign in / Sign up

Export Citation Format

Share Document