Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ G. Sun, K. J. Ranson, V. I. Kharuk // Remote Sensing of Environment. - 2002. - Vol. 79, Is. 2-3. - P279-287, DOI 10.1016/S0034-4257(01)00279-6 . - ISSN 0034-4257
Аннотация: We investigated the possibility of using multiple polarization (SIR-C) L-band data to map forest biomass in a mountainous area in Siberia. The use of a digital elevation model (DEM) and a model-based method for reducing terrain effects was evaluated. We found that the available DEM data were not suitable to correct the topographic effects on the SIR-C radar images. A model-based slope correction was applied to an L-band cross-polarized (hv) backscattering image and found to reduce the topographic effect. A map of aboveground biomass was produced from the corrected image. The results indicated that multipolarization L-band synthetic aperture radar (SAR) data can be useful for estimation of total aboveground biomass of forest stands in mountainous areas. В© 2002 Elsevier Science Inc. All rights reserved.

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Department of Geography, University of Maryland, College Park, MD 20742, United States
NASA's Goddard Space Flight Center, Code 923, Greenbelt, MD 20771, United States
Sukachev Institute of Forest, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sun, G.; Ranson, K.J.; Kharuk, V.I.

/ K. J. Ranson [et al.] // Remote Sensing of Environment. - 2001. - Vol. 75, Is. 2. - P188-200, DOI 10.1016/S0034-4257(00)00166-8 . - ISSN 0034-4257
Аннотация: This paper examines the use of space-borne radar data to map forest types and logging in the mountainous Western Sayani area in central Siberia. L- and C- band HH-, HV-, and VV-polarized images from the Shuttle Imaging Radar-C instrument were used in the study. Techniques to reduce topographic effects in the radar images were investigated. These included radiometric correction using illumination angle inferred from a digital elevation model and reducing apparent effects of topography through band ratios. Forest classification was performed after terrain correction utilizing typical supervised techniques and principal component analyses. An ancillary data set of local elevations was also used to improve the forest classification. Map accuracy for each technique was estimated for training sites based on Russian forestry maps, satellite imagery, and field measurements. The results indicate that it is necessary to correct for topography when attempting to classify forests in mountainous terrain. Radiometric correction based on a digital elevation model improved classification results but required reducing the synthetic aperture radar resolution to match the digital elevation model. Using ratios of synthetic aperture radar channels that include cross-polarization improved classification and had the advantages of eliminating the need for a digital elevation model and preserving the full resolution of the synthetic aperture radar data. В© Elsevier Science Inc., 2001.

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Держатели документа:
NASA's Goddard Space Flight Center, Code 923, Greenbelt, MD, United States
Department of Geography, University of Maryland, College Park, MD, United States
V. N. Sukachev Institute of Forest, Academgorodok, Krasnoyarsk, Russian Federation
Science Systems and Applications, Inc., Lanham, MD, United States
NASA's Goddard Space Flight Center, Code 923, Greenbelt, MD 20771, United States

Доп.точки доступа:
Ranson, K.J.; Sun, G.; Kharuk, V.I.; Kovacs, K.

/ V. I. Kharuk, V. V. Yegorov // Remote Sensing of Environment. - 1990. - Vol. 33, Is. 1. - P35-40 . - ISSN 0034-4257
Аннотация: Application of polarization characteristics of reflected radiation to indicate the water stress of plants and extent of their pollution by industrial dust is studied. Experiments were carried out under field conditions. The objects measured were the leaves and shoots of woody and agricultural plants. The measurements were carried out at the wavelengths of 1.75 ?m and 2.2 ?m, at the Brewster angle. The fact that the degree of polarization of reflected light can serve to diagnose 5-10% water loss by the foliage is established; the effect is due to altered spatial orientation of the foliage in the crown owing to water stress. Pollution of foliage by industrial dust is accompanied by a decrease in the degree of polarization of the reflected radiation: the model experiments demonstrated the possibility of recording pollution not more than 0.03 ton / h. The effect is based on the difference between the values of degree of polarization of pollutants and the foliage. В© 1990.

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Держатели документа:
V. N. Sukachev Institute of Forest and Wood, USSR Academy of Sciences (Siberian Branch), Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kharuk, V.I.; Yegorov, V.V.

/ V. I. Kharuk, V. V. Egorov // Doklady Biological Sciences. - 1990. - Vol. 309, Is. 1-6. - P705-707 . - ISSN 0012-4966

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Держатели документа:
V. N. Sukachev Institute of Forests and Timber, Siberian Branch, Academy of Sciences of the USSR, Krasnoyarsk, Russia

Доп.точки доступа:
Kharuk, V.I.; Egorov, V.V.

/ F. Pourpoint [et al.] // Chem. Geol. - 2017. - Vol. 452. - P1-8, DOI 10.1016/j.chemgeo.2017.02.004. - Cited References:60. - The Lille group is grateful for funding by the Region Nord/Pas-de-Calais, France, Europe (FEDER), CNRS, Ministere de l'Enseignement Superieur et de la Recherche, Institut Chevreul (FR 2638), CPER, ENSCL, and contract ANR-14-CE07-0009-01. Bruker Company and Fabien Aussenac are warmly acknowledged for providing access to DNP-NMR spectrometer. Guillaume Laurent is also acknowledged for fruitful discussion. Financial support from the IR-RMN-THC FR-3050 CNRS for conducting the research is gratefully acknowledged. . - ISSN 0009-2541. - ISSN 1878-5999РУБ Geochemistry & Geophysics

Аннотация: In a Siberian river, the concentrations of chemical species vary with the hydrological regime. Dissolved Organic Matter (DOM) and aluminum ions show a parallel trend in the course of the hydrological year. However, the speciation of aluminum in this natural environment remains an open question. We propose here a combination of spectroscopic techniques to investigate the proximity between the aluminum atoms and DOM. First, one-dimensional (1D) solid-state Nuclear Magnetic Resonance (NMR), Electron Paramagnetic Resonance (EPR) and 1D and 2D solution NMR spectra were acquired, providing a clear overview of the DOM composition. Second, the sensitivity enhancement yielded by Dynamic Nuclear Polarization enabled the NMR detection of proximities between the Al-27 and C-13 nuclei. Hence, we show that 8.3 +/- 1.3% of the carboxylate groups observed by NMR are connected to the Al3+ ions in the DOM sample. We here demonstrate for the first time how advanced solid-state NMR methods can provide key information about the localization of aluminum in such complex natural materials. (C) 2017 Elsevier B.V. All rights reserved.

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Держатели документа:
Univ Lille, CNRS, ENSCL, UCCS,UMR 8181, F-59000 Lille, France.
Univ Paris 06, CNRS, METIS Milieux Environnementaux Transferts & Inte, UMR 7619, F-75252 Paris 05, France.
Univ Lille, CNRS, LASIR Lab Spect Infrarouge & Raman, UMR 8516, F-59000 Lille, France.
Univ Lille, CNRS, UGSF, UMR 8576, F-59000 Lille, France.
Univ Strasbourg, CNRS, LHyGeS, UMR 7517, F-67084 Strasbourg, France.
CNRS, GET, Observ Midi Pyrenees, UMR 5563, Toulouse, France.
V N Sukachev Inst Forest SB RAS, Akademgorodok 50-28, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Pourpoint, Frederique; Templier, Joelle; Anquetil, Christelle; Vezin, Herve; Trebosc, Julien; Trivelli, Xavier; Chabaux, Francois; Pokrovsky, Oleg S.; Prokushkin, Anatoly S.; Amoureux, Jean-Paul; Lafon, Olivier; Derenne, Sylvie; Region Nord/Pas-de-Calais, France, Europe (FEDER); Ministere de l'Enseignement Superieur et de la Recherche; Institut Chevreul [FR 2638]; CPER; ENSCL [ANR-14-CE07-0009-01]; IR-RMN-THC FR-3050 CNRS

/ I. N. Tretyakova [et al.] // Plant Cell Tissue Organ Cult. - 2018, DOI 10.1007/s11240-018-01533-y . - Article in Press. - ISSN 0167-6857
Аннотация: We carried out immunoassay of plant hormones [indoleacetic acid (IAA), cytokinins and abscisic acid (ABA)] in the extracts from explants (megagametophytes and embryos) and from four long-term proliferating embryogenic cell lines of Larix sibirica. Immunohistochemical detection of hormones has also been performed at the stage of initiation of somatic embryogenesis and in embryogenic cultures during the process of somatic embryo morphogenesis. During induction of somatic embryogenesis in tissue culture, the first stage of cell development is manifested in their elongation and polarization. Immunohistochemical analysis of hormones showed localization of IAA at one pole of elongated cells of L. sibirica. The polarity of embryogenic structure development persisted later on. The difference has been shown in the content of hormones between the explants and embryogenic cultures. High level of hormones was detected in the cell line (Cl4), distinguished by great number of globular embryos and high capacity for their maturation. Hybrid line Cl5 (L. sibirica ? L. sukaszewii) formed very short suspensor, accumulated higher amount of ABA in the head of somatic embryos (SEs) than did other lines, while SEs of this cell line did not maturate. Cl6 was characterized by low plant hormones content in proliferating embryogenic cultures and low yield of mature somatic embryos. © 2018, Springer Nature B.V.

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Siberian Branch, Federal Research Center «Krasnoyarsk Science Center SB RAS», V.N. Sukachev Institute of Forest, Russian Academy of Sciences, Akademgorodok 50/28, Krasnoyarsk, 660036, Russian Federation
Institute of Biology, Ufa Federal Research Center, Russian Academy of Sciences, Prospect Oktyabrya 69, Ufa, 450054, Russian Federation
Department of Biology, Bashkir State University, Validi 32, Ufa, 450076, Russian Federation

Доп.точки доступа:
Tretyakova, I. N.; Kudoyarova, G. R.; Park, M. E.; Kazachenko, A. S.; Shuklina, A. S.; Akhiyarova, G. R.; Korobova, A. V.; Veselov, S. U.