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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mironov V. L., Kerr Y. H., Kosolapova L. G., Savin I. V., Muzalevskiy K. V.
Заглавие : A temperature-dependent dielectric model for thawed and frozen organic soil at 1.4 GHz
Коллективы : Russian Science Foundation [14-17-00656]
Место публикации : IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.: IEEE-Institute Electrical and Electronics Engineers, 2015. - Vol. 8, Is. 9. - P.4470-4477. - ISSN 1939-1404, DOI 10.1109/JSTARS.2015.2442295. - ISSN 2151-1535
Примечания : Cited References:19. - This work was supported in part by a grant from the Russian Science Foundation under Project 14-17-00656
Предметные рубрики: moisture retrieval algorithm
active layer
validation
Ключевые слова (''Своб.индексиров.''): dielectric constant--dielectric losses--dielectric measurement--l-band--modeling--soil moisture--soil properties
Аннотация: A single-frequency dielectric model for thawed and frozen Arctic organic-rich (80%-90% organic matter) soil was developed. The model is based on soil dielectric data that were measured over the ranges of volumetric moisture from 0.007 to 0.573 cm3/cm3, dry soil density from 0.564 to 0.666 g/cm3, and temperature from 25°C to -30°C (cooling run), at the frequency of 1.4 GHz. The refractive mixing model was applied to fit the measurements of the soil's complex refractive index (CRI) as a function of soil moisture, with the values of temperature being fixed. Using the results of this fitting, the parameters of the refractive mixing model were derived as a function of temperature. These parameters involve the CRIs of soil solids as well as bound, transient, and free soil water components. The error of the dielectric model was evaluated by correlating the predicted complex relative permittivity (CRP) values of the soil samples with the measured ones. The coefficient of determination (R2) and the root-mean-square error (RMSE) were estimated to be R2 = 0.999, RMSE = 0.27 and R2 = 0.993, RMSE = 0.18 for the real and imaginary parts of the CRP, respectively. These values are in the order of the dielectric measurement error itself. The proposed dielectric model can be applied in active and passive remote-sensing techniques used in the areas with organicrich soil covers, mainly for the SMOS, SMAP, and Aquarius missions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prudnikova S. V., Kiselev E. G., Demidenko A. V., Nemtsev I. V., Shishatskaya E. I., Thomas S., Volova T. G.
Заглавие : Biodegradation of microbial plastic poly(3-hydroxybutyrate) in soil ecosystems at different latitudes
Колич.характеристики :12 с
Место публикации : Giant. - 2024. - Vol. 18. - Ст.100288. - ISSN 26665425 (eISSN), DOI 10.1016/j.giant.2024.100288
Примечания : Cited References: 96. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. FWES-2021-0025)
Аннотация: The features of the degradation of the "green" plastic poly(3-hydroxybutyrate) [P(3HB)] in the soil of various geographical regions were studied: in red ferralitic soil under tropical conditions (Kerala, India) and in chernozem soil under conditions of a sharply continental climate (Eastern Siberia, Russia). Significant differences in the chemical composition, temperature, and humidity of the studied soils were revealed. The number of bacteria and mycelial fungi in the Siberian chernozem was higher than in the red soil of India, from 2-3 to 10 or more times. The degradation of P(3HB) films in the chernozem occurred faster than in the red soil, which was drier, with a low content of humus and minerals, and fewer microorganisms than the chernozem. The half-life of polymer samples in Siberia and India was 64.8 and 126.4 days, respectively. During degradation, a decrease in the molecular weight and an increase in the degree of crystallinity of polymer samples were revealed, which indicates a more active biodegradation of the amorphous phase of the polymer by soil microorganisms. The primary degraders of the polymer have been isolated and identified, and it has been shown that the complexes of degrading bacteria and fungi in different types of soils did not have common species. Despite the presence of species with pronounced depolymerase activity, the rate of film degradation in red ferralitic soils was slowed down by unfavorable environmental conditions. The obtained results confirm the importance of studying the process of PHA degradation in natural conditions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Prudnikova S. V., Filipenko M. L., Khrapov E. A., Vasil'ev A. D., Volova T. G.
Заглавие : Biodegradation of polyhydroxyalkanoates by soil microbial communities of different structures and detection of PHA degrading microorganisms
Место публикации : Appl. Biochem. Microbiol.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 48, Is. 1. - P.28-36. - ISSN 0003-6838, DOI 10.1134/S0003683812010024
Примечания : Cited References: 39. - The work was supported by the project initiated by the Government of the Russian Federation for governmental support of scientific research conducted under the guidance of leading scientists at Russian institutions of higher learning (Agreement No. 11.G34.31.0013) and the Program of Integrated Research of the Presidium of the Siberian Branch of Russian Academy of Sciences (project no. 96).
Предметные рубрики: POLY-BETA-HYDROXYBUTYRATE
CHAIN-LENGTH POLYHYDROXYALKANOATES
DEGRADATION
FILMS
POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE)
BACTERIA
ACID
Аннотация: Biodegradation of microbial linear polymers of hydroxyalkanoic acids (polyhydroxyalkanoates, PHAs) by soil microbial communities of different structures has been studied during two field seasons in different weather conditions. This process was shown to be influenced by the polymer chemical composition, temperature, humidity, and the microbial soil component. The PHA degradation was accompanied by a decrease in the polymer molecular weight and an increase in the degree of crystallinity, indicating the preferential destruction of the amorphous phase compared to the crystalline one. The quantity of the true PHA destructors developing at the surface of the polymer samples was lower than the quantity of accompanying bacteria. The dominant PHA degrading microorganisms under the test conditions were identified as bacteria of the genera Variovorax, Stenotrophomonas, Acinetobacter, Pseudomonas, Bacillus, and Xanthomonas and as micromycetes from Penicillium, Paecilomyces, Acremonium, Verticillium, and Zygosporium.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bobrov P. P., Kroshka E. S., Muzalevskiy K. V.
Заглавие : The effect of dielectric relaxation processes on the complex dielectric permittivity of soils at frequencies from 10 kHz to 8 GHz—Part II: Broadband analysis
Колич.характеристики :11 с
Место публикации : IEEE Trans. Geosci. Remote Sens. - 2024. - Vol. 62. - Ст.2000411. - ISSN 01962892 (ISSN), DOI 10.1109/TGRS.2023.3340693. - ISSN 15580644 (eISSN)
Примечания : Cited References: 51
Аннотация: This article is the second in a series evaluating the effect of dielectric relaxation processes on the relatively effective complex dielectric permittivity (RCP) of soils. Part II is based on the results of experimental measurements in the frequency range 10 kHz to 8–20 GHz. The broadband dielectric spectrum model includes the high-frequency part as a model of the dielectric mixture and the relaxation part as the sum of three relaxation processes modeled by the Debye and Cole–Cole formulas. For modeling the high-frequency part of the spectrum, the Dobson and Mironov models were considered as possible options. As stated in Part I, the influence of relaxation processes on the imaginary part of the RCP extends up to frequencies of units of gigahertz. The increase in the imaginary part in these models was compensated by unrealistically high values of the specific electrical conductivity of free and bound water. We examined the correspondence of these models to experimental data at frequencies above 2–5 GHz, assuming that the conductivity of bound and free water is zero. The parameters of relaxation processes were found while solving the least-square optimization problem using the technique for determining the continuous distribution of relaxation times (DRTs). Found process parameters depend on the content of clay, organic carbon, and moisture of the samples. The more clay is in the soil, the greater the strength of these processes is. The influence of organic carbon with the conditions being equal consists in the reduction of the real and imaginary parts of RCP.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Bobrov P. P., Mironov V. L., Yashchenko A. S., Kosolapova L. G.
Заглавие : Comparison of Two Retrieval Soil Moisture Algorithms on SMOS Data
Коллективы : IEEE International Geoscience and Remote Sensing Symposium (2012 ; July ; 22-27; Munich, Germany)
Место публикации : IEEE International Geoscience and Remote Sensing Symposium (IGRASS): Proceedings. - Munich, 2012. - С. 1131-1134. - ISBN 978-1-4673-1159-5, DOI 10.1109/IGARSS.2012.6351349
Аннотация: We made the conclusion about the main deficiencies of the SMOS data Level 1c and Level 2 for the south part of Western Siberia. This was done for the period from 12.07.10 to 10.11.11 by studying SMOS data, periodic ground base measurements of the brightness temperature at 1.4 GHz and ground base measurements of moisture. We developed a simple algorithm for remote retrieval of soil moisture using data of brightness temperature given at SMOS Level 1c, compared the data of soil moisture, given at SMOS Level 2 with data calculated by our algorithm and in situ measurements of moisture.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T. G., Kiselev E. G., Baranovskiy S. V., Zhila N. O., Prudnikova S. V., Shishatskaya E. I., Kuzmin A. P., Nemtsev I. V., Vasiliev A. D., Thomas S.
Заглавие : Degradable poly(3-hydroxybutyrate)—the basis of slow-release fungicide formulations for suppressing potato pathogens
Место публикации : Polymers. - 2022. - Vol. 14, Is. 17. - Ст.3669. - ISSN 20734360 (ISSN), DOI 10.3390/polym14173669
Примечания : Cited References: 118
Аннотация: Three-component slow-release fungicide formulations with different modes of action of the active ingredients for suppressing potato pathogens were constructed for the first time. The difenoconazole, mefenoxam, prothioconazole, and azoxystrobin fungicides were embedded in the degradable polymer P(3HB)/birch wood flour blend and examined using SEM, IR spectroscopy, X-ray analysis, DTA, and DSC. Results showed that no chemical bonds were established between the components and that they were physical mixtures that had a lower degree of crystallinity compared to the initial P(3HB), which suggested different crystallization kinetics in the mixtures. The degradation behavior of the experimental formulations was investigated in laboratory micro-ecosystems with pre-characterized field soil. The slow-release fungicide formulations were prolonged-action forms with a half-life of at least 50–60 d, enabling gradual and sustained delivery of the active ingredients to plants. All slow-release fungicide formulations had a strong inhibitory effect on the most common and harmful potato pathogens (Phytophthora infestans, Alternaria longipes, Rhizoctonia solani, and Fusarium solani).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bobrov P.P., Mironov V.L., Yashchenko A.S.
Заглавие : Diurnal Dynamics Radiobrightness Temperature of Soil on the Frequency 1.4 and 6.9 GHz in the Processes of Freezing/Thawing
Место публикации : Proceedings IGARSS. - 2010. - С. 4477-4479
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demontoux F., Le Crom B, Ruffi G., Wigneron JP., Grant J.P, Mironov V.L.
Заглавие : Electromagnetic characterization of soil-litter media - Application to the simulation of the microwave emissivity of the ground surface in forests
Место публикации : European Physical Journal - Applied Physics. - 2008. - Vol. 44, Is. 3. - С. 303-315
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Mironov V. L., Kosolapova L. G., Demontoux F.
Заглавие : Error of Moisture Retrieving from the SMOS Radiobrightness with the Use of the Temperature Dependable Soil Dielectric Model
Коллективы : Progress In Electromagnetics Research Symposium
Серия: PIERS 2011 Suzhou - Progress in Electromagnetics Research Symposium, Proceedings
Место публикации : Proc. PIER. - 2011. - С. 709-711
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mironov V. L., Kerr Y ., Wigneron J.-P., Kosolapova L.-G., Demontoux F., Duffour С.
Заглавие : Error of Moistures Retrieved From еhe Smos Radiobrightnesses, Being Induced by a Soil Dielectric Model Employed
Место публикации : Известия высших учебных заведений. Физика. - 2010. - Т. 53, № 9/3. - С. 317-320
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