O. A. Shapchenkova's research while affiliated with Russian Academy of Sciences and other places

Publications (12)

Article
Hygroscopic properties of nine hardwoods from Hungary were studied by moisture sorption isotherms, methods of thermogravimetry (TG) and differential scanning calorimetry (DSC). The studied wood species included oak, beech, hornbeam, black locust, lime, ash, maple, alder, and aspen. The parameters of the wood — water sorption system were calculated...
Article
Full-text available
This paper presents a thermal characterization of hardwoods of Hungarian origin. The study covers the wood of the following tree species: sessile oak (Quercus petraea), beech (Fagus sylvatica), hornbeam (Carpinus betulus), black locust (Robinia pseudoacacia), lime (Tilia platyphyllos), ash (Fraxinus ornus), maple (Acer campestre), alder (Alnus glut...
Article
The changes in the physico-chemical parameters of Scotch pine Pinus sylvestris L. wood were studied at an early stage of a fungal infection development in it using the methods of IR-Fourier spectroscopy and scanning electron microscopy (SEM). Analysis of SEM-images of locally damaged wood showed the presence of hyphae both in the intercellular spac...
Article
Full-text available
Thermal decomposition of wood from coniferous and deciduous species of Siberia has been studied using thermogravimetry (TG) and differential scanning calorimetry (DSC). The tree species were larch Larix sibirica Ledeb., Scots pine Pinus sylvestris L., spruce Picea obovata Ledeb., fir Abies sibirica Ledeb., Siberian pine Pinus sibirica Du Tour., bir...
Article
An analysis of the ecological and functional state of soils within the zone of air pollution of Norilsk industrial plants has been made. The criteria used for estimation are the content of heavy metals (HMs) and sulfur, as well as the microbiological activity of the soil. The basic polluting elements are distinguished. It is determined that the are...
Article
The hygroscopic properties of the litter of coniferous (larch and pine) and deciduous (aspen and birch) stands were studied in terms of isotherms of water-vapor sorption and with use of thermal analysis methods (TG, DSC). It was found that most of the monolayer capacity belongs to subhorizons OL and OF of the larch and pine forest litters. The larc...
Article
The quantitative and functional responses of soil microbial cenoses in the forest-tundra zone to pollution have been studied in the area exposed to emissions from the Norilsk Mining and Metallurgical Works. The strongest structural and functional disturbances of the soil biota have been recorded on the plots with completely destroyed vegetation. A...
Article
Experimental data on the effect of surface fires on the organic matter transformation in the gray-humus soils of pine forests were obtained in the southwestern part of the Baikal region. The application of methods of thermal analysis (such as differential scanning calorimetry and thermogravimetry) made it possible to obtain qualitative and quantita...
Article
The thermal degradation of organic matter was studied in cryogenic soils with methods of thermal analysis: differential scanning calorimetry and thermogravimetry (DSC and TG, respectively). The DSC curves of most of the samples within the temperature range from 221–247°C to 600°C were characterized by the presence of one wide exothermic peak (at 31...
Article
Water solutions of fluorine and sulfur-containing salts of sodium—NaF, Na2SO3, and NaF + Na2SO3 (30, 150, and 300 MPC, respectively)—and salts of heavy metals—(Cu(NO3)2 · 3H2O, NiSO4, and Pb(NO3)2 (10, 25, and 50 MPC, respectively)—were applied as pollutants to dark gray forest soils of experimental plots (1 m2) in Siberian larch (Larix sibirica Le...

Citations

... It is known that the presence of oxygen enhances the thermal degradation of the materials at low temperatures, causes the appearance of gas-phase reactions between the volatile released and oxygen, and promotes the combustion of the char generated in the early stages of the solid degradation (Bilbao et al. 1997). Analysis of the literature shows that either the wood thermal degradation of various deciduous species in an oxidative atmosphere or kinetics of wood combustion has been described in several studies (Fang et al. 2006;Franceschi et al. 2008;Brostow et al. 2009;Budrugeac and Emandi 2010;Emandi et al. 2011;Garcia-Maraver et al. 2013;TranVan et al. 2014;Loskutov et al. 2015). It was demonstrated that the methods of thermal analysis can be applied to the assessment of wood composition and the holocellulose/lignin ratio as well as to the evaluation of the combustion properties in terms of the amount of energy released and the thermal stability of wood. ...
... Forest litter is a structural-functional element of forest biogeocenosis, which plays an important role in metabolic processes, humus accumulation, moisture supply of trees, and migration of elements and compounds in the soil profile (Travleev, 1961;Sapozh-nikov, 1985;Dubina, 1987;Hobbie, 2006;Vesterdal, 2008;Kitikidou, 2012;Loskutov, 2013;Boldeskul, 2015). It also has other integral, system-forming, and biogeochemical functions (Bogatyrev, 1996). ...
... P < 0.001). Other studies reported the water elimination from soil at a temperature ranging from 25-40 to 150-220°C; SOM thermal destruction, from 180-200 to 550-700°C; and thermal destruction of individual minerals, mainly from 600-700 to 900-1000°C [4,15,16,21,26,27,31,32,35,39,44]. ...
... The influence of HMs on the soil is expressed in a change its biological activity (Vodyanitskii, 2013). Under the influence of increased HM concentrations, a sharp decrease in the number of certain agronomically valuable groups of soil microorganisms (Sorokin et al., 2009;Hassan et al., 2013;Murata et al., 2005) and the activity of soil enzymes, such as dehydrogenases, catalases, ureases, amylases, invertase (Novoselova et al., 2016;Ofoegbu et al., 2013;Shi et al., 2008), was observed. These changes ultimately led to a decrease in soil fertility and crop yield (Abou-Shanab et al., 2005). ...
... According to the degree of resistance to thermal destruction, the overall SOM is divided into the labile pool with weakly bound biologically degradable organic matter and the stable pool with tightly bound, mainly humic components [2,26,33,39]. Analytical pyrolysis and thermogravimetry in combination with differential scanning calorimetry, mass spectrometry, or chromatography-mass spectrometry identify three group of organic substances differing in their stability to thermal destruction, namely, labile, recalcitrant, and refractory [13,16,21,22,26,27,31,36]. The temperature ranges characterizing thermal stability of these three groups may vary depending on the research conditions and soil properties [42]. ...