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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kiselev, Evgeniy G., Boyandin, Anatoly N., Zhila, Natalia O., Prudnikova, Svetlana, V, Shumilova, Anna A., Baranovskiy, Sergey, V, Shishatskaya, Ekaterina, I, Thomas, Sabu, Volova, Tatiana G.
Заглавие : Constructing sustained-release herbicide formulations based on poly-3-hydroxybutyrate and natural materials as a degradable matrix
Колич.характеристики :14 с
Коллективы : Government of the Russian Federation [074-02-2018-328, 220]
Место публикации : Pest Manag. Sci.: JOHN WILEY & SONS LTD. - ISSN 1526-498X, DOI 10.1002/ps.5702. - ISSN 1526-4998(eISSN)
Примечания : Cited References:83. - This study was financially supported by the project 'Agropreparations of the new generation: a strategy of construction and realization' (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, 'On measures designed to attract leading scientists to the Russian institutions of higher learning'.
Предметные рубрики: SOIL MICROBIAL COMMUNITY
FENOXAPROP-P-ETHYL
SLOW-RELEASE
METRIBUZIN
Аннотация: BACKGROUND The purpose of the present study was to develop ecofriendly herbicide formulations. Its main aim was to develop and investigate slow-release formulations of herbicides (metribuzin, tribenuron-methyl, and fenoxaprop-P-ethyl) of different structure, solubility, and specificity, which were loaded into a degradable matrix of poly-3-hydroxybutyrate (P(3HB)) blended with available natural materials (peat, clay, and wood flour). RESULTS Differences in the structure and physicochemical properties of the formulations were studied depending on the type of the matrix. Herbicide release and accumulation in soil were associated with the solubility of the herbicide. Fourier-transform infrared spectroscopy showed that no chemical bonds were formed between the components in the experimental formulations. Degradation of the formulations in agro-transformed soil in laboratory conditions was chiefly influenced by the shape of the specimens (granules or pellets) while the effect of the type of filler (peat, clay, or wood flour) was insignificant. The use of granules enabled more rapid accumulation of the herbicides in soil: their peak concentrations were reached after 3 weeks of incubation while the concentrations of the herbicides released from the pellets were the highest after 5-7 weeks. Loading of the herbicides into the polymer matrix composed of the slowly degraded P(3HB) and natural materials enabled both sustained function of the formulations in soil (lasting between 1.5 and = 3 months) and stable activity of the otherwise rapidly inactivated herbicides such as tribenuron-methyl and fenoxaprop-P-ethyl. CONCLUSION The experimental herbicide formulations enabled slow release of the active ingredients to soil. (c) 2019 Society of Chemical Industry
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T., Kiselev E., Nemtsev I., Lukyanenko А., Sukovatyi A., Kuzmin A., Ryltseva G., Shishatskaya E.
Заглавие : Properties of degradable polyhydroxyalkanoates with different monomer compositions
Место публикации : Int. J. Biol. Macromol.: Elsevier B.V., 2021. - Vol. 182. - С. 98-114. - ISSN 01418130 (ISSN), DOI 10.1016/j.ijbiomac.2021.04.008
Аннотация: Purpose: To synthesize and investigate polyhydroxyalkanoates (PHAs) with different monomer composition and percentages and polymer films prepared from them. Results: Various PHAs: homopolymer poly-3-hydroxybutyrate P(3HB) and 2-, 3-, and 4-component copolymers comprising various combinations of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), and 3-hydroxyhexanoate (3HHx) monomers were synthesized under specialized conditions. Relationships were found between the monomer composition of PHAs and their molecular-weight and thermal properties and degree of crystallinity. All copolymers had decreased weight average molecular weights, Mw (to 390–600 kDa), and increased values of polydispersity (3.2–4.6) compared to the P(3HB). PHA copolymers showed different thermal behavior: an insignificant decrease in Tmelt and the presence of the second peak in the melting region and changes in parameters of crystallization and glass transition. At the same time, they retained thermostability, and the difference between Tmelt and Tdegr was at least 100–120 °C. Incorporation of 4HB, 3HV, and 3HHx monomer units into the 3-hydroxybutyrate chain caused changes in the amorphous to crystalline ratio and decreased the degree of crystallinity (Cx) to 20–40%. According to the degree to which the monomers reduced crystallinity, they were ranked as follows: 4HB – 3HHx – 3HV. A unique set of films was produced; their surface properties and physical/mechanical properties were studied as dependent on PHA composition; monomers other than 3-hydroxybutyrate were found to enhance hydrophilicity, surface development, and elasticity of polymer films. Conclusion: An innovative set of PHA copolymers was synthesized and solution-cast films were prepared from them; the copolymers and films were investigated as dependent on polymer chemical composition. Results obtained in the present study contribute to the solution of a critical issue of producing degradable polymer materials. © 2021 Elsevier B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kiselev E. G., Vasiliev A. D., Volova T. G.
Заглавие : Synthesis and characterization of multicomponent PHAs
Место публикации : J. Sib. Fed. Univ. - Biol.: Siberian Federal University, 2021. - Vol. 14, Is. 1. - С. 97-113. - ISSN 19971389 (ISSN), DOI 10.17516/1997-1389-0325
Примечания : Cited By :1
Аннотация: Cupriavidus necator B10646 bacterial cells were cultivated in the mode of synthesis of the reserve polyhydroxyalkanoates (PHAs) in the growth medium that contained, in addition to glucose as the main substrate, precursor substrates of the monomers of various monocarboxylic acids - salts of valeric and hexanoic acids, propionate, and ?-butyrolactone. PHA terpolymers and quaterpolymers with different compositions and proportions of monomers were synthesized, and their physicochemical properties were studied. The terpolymers were composed of monomers of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), or 3-hydroxyhexanoate (3HHx) and had the following compositions: P(3HB/3HB/4HHx) and P(3HB/3HV/4HHx). The quaterpolymers had the following composition: P(3HB/3HV/4HB/3HHx). All copolymer samples, regardless of the composition and proportions of monomers, had lower molecular weights and higher polydispersity values compared to the highly crystalline 3-hydroxybutyrate homopolymer, but retained thermal stability properties, with a difference between the melting point and thermal degradation of at least 100-110 °C. The inclusion of 3HV, 4HB, and 3HHx monomers in the C-chain of 3HB caused changes in the crystalline to amorphous phase ratio and a significant decrease in the degree of crystallinity (Cx), which depended on the type of monomers and their contents in the copolymer. The maximum decrease in Cx (9-17 %) was detected in the P(3HB/3HV/4HB) terpolymer and the P(3HB/3HV/4HB/3HHx) quaterpolymer (30-36 %). The study confirms that there is the possibility of synthesizing polymers with various compositions, including new ones, which differ significantly in their basic properties. © Siberian Federal University. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Kazantseva E. A.
Заглавие : Constructing slow-release formulations of herbicide metribuzin using its co-extrusion with biodegradable polyester poly-ε-caprolactone
Место публикации : J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes: Bellwether Publishing, Ltd., 2021. - Article in press. - ISSN 03601234 (ISSN), DOI 10.1080/03601234.2021.1911206
Аннотация: Different technologies to prepare long term pesticide forms include polymer coating, preparing composites and encapsulating pesticides in nanoparticles. A simple and low-cost method was proposed to obtain slow-release formulations by co-extrusion of a pesticide with a biodegradable polymer at a temperature above the melting points of both components. A herbicide metribuzin and low-melting polyester poly-?-caprolactone were chosen for this work. Formulations containing 10%, 20%, and 40% herbicide were prepared. During 7 days of their exposition in water, it was released from 81% to 96% of initially loaded metribuzin; the highest release was detected for 40%-loaded forms. Biodegradation of the constructs and pesticide release were further studied in the model soil. Degradation rates of the specimens increased with an increase in pesticide content, from 9% to 20% over 14 weeks for the 10%/20%-loaded and the 40%-loaded specimens, respectively. The release of metribuzin reached, respectively, 37–38% and 55%. The herbicide content in soil was lower due to its partial degradation in soil; it reached 23–25% and 33%, respectively, from initially loaded into the polymer matrix. Release kinetics of metribuzin in water as in soil best fitted the First-order model. The used approach is promising for obtaining long-term release formulations for soil applications. © 2021 Taylor & Francis Group, LLC.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M. I.
Заглавие : Oil Spills in Fresh Waters and State of Ecosystem of Lake Pyasino before the Incidental Spill of 2020
Колич.характеристики :10 с
Коллективы : Siberian Branch of the Russian Academy of SciencesRussian Academy of Sciences [223-EP2020/07]; Basic Research of the Russian Federation [51.1.1]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2021. - Vol. 14, Is. 4. - С. 313-322. - ISSN 1995-4255, DOI 10.1134/S1995425521040041. - ISSN 1995-4263(eISSN)
Примечания : Cited References:50. - This work was supported by Federal Tasks no. 223-EP2020/07 with the Siberian Branch of the Russian Academy of Sciences and by State Assignment as a part of Basic Research of the Russian Federation, topic no. 51.1.1.
Предметные рубрики: POLYUNSATURATED FATTY-ACIDS
PECHORA BASIN
RIVER
ZOOPLANKTON
Аннотация: This article presents the history of large oil spills in freshwaters, considering the processes of physicochemical and biological degradation of oil. It discusses the toxicity of oil for hydrobionts and effects of oil pollution on communities of plankton, benthos, and ichthyofauna, as well as challenges in mitigating the environmental impact of oil spills. The discussion is concerned with the state of the ecosystem in Lake Pyasino before the incidental spill of 2020, specifically, hydrochemical indicators; species composition; and abundance and biomass of plankton, benthos, and fish. Candidate technologies for restoring the Lake Pyasino ecosystem are reviewed, including "bottom-up" biomanipulation.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Burakova, Ludmila P., Lyakhovich, Maria S., Mineev, Konstantin S., Petushkov, Valentin N., Zagitova, Renata, I, Tsarkova, Aleksandra S., Kovalchuk, Sergey, I, Yampolsky, Ilia, V, Vysotski, Eugene S., Kaskova, Zinaida M.
Заглавие : Unexpected Coelenterazine Degradation Products of Beroe abyssicola Photoprotein Photoinactivation
Колич.характеристики :4 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-04-00085]; Russian Foundation for Basic Research, Krasnoyarsk Territory [20-44-242003]; Krasnoyarsk Regional Fund of Science in part of purification and spectral characterization of native compounds; Russian Science FoundationRussian Science Foundation (RSF) [17-1401169p]; Russian FederationRussian Federation [LS-2605.2020.4]
Место публикации : Org. Lett.: AMER CHEMICAL SOC, 2021. - Vol. 23, Is. 17. - С. 6846-6849. - ISSN 1523-7060, DOI 10.1021/acs.orglett.1c02410. - ISSN 1523-7052(eISSN)
Примечания : Cited References:20. - This work was supported by grant 20-04-00085 of the Russian Foundation for Basic Research, grant 20-44-242003 of the Russian Foundation for Basic Research, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science in part of purification and spectral characterization of native compounds, grant 17-1401169p of the Russian Science Foundation, and the President of Russian Federation grant for Leading Scientific Schools LS-2605.2020.4 in part of structural elucidation of native products and organic synthesis. We thank Konstantin Antonov (IBCh RAS) and Igor Ivanov (IBCh RAS) for the registration of HRMS spectra.
Предметные рубрики: CRYSTAL-STRUCTURE
BIOLUMINESCENCE
OBELIN
RESIDUES
BINDING
Аннотация: Ca2+-regulated photoproteins of ctenophores lose bioluminescence activity when exposed to visible light. Little is known about the chemical nature of chromophore photo-inactivation. Using a total synthesis strategy, we have established the structures of two unusual coelenterazine products, isolated from recombinant berovin of the ctenophore Beroe abyssicola, which are Z/E isomers. We propose that during light irradiation, these derivatives are formed from 2-hydroperoxycoelenterazine via the intermediate 8a-peroxide by a mechanism reminiscent of that previously described for the auto-oxidation of green-fluorescent-protein-like chromophores.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Neubauer, Darshan, Kolmakova, Olesya, Woodhouse, Jason, Taube, Robert, Mangelsdorf, Kai, Gladyshev, Michail, Premke, Katrin, Grossart, Hans-Peter
Заглавие : Zooplankton carcasses stimulate microbial turnover of allochthonous particulate organic matter
Колич.характеристики :16 с
Коллективы : Projekt DEAL
Место публикации : ISME J.: SPRINGERNATURE, 2021. - Article in press. - ISSN 1751-7362, DOI 10.1038/s41396-020-00883-w. - ISSN 1751-7370(eISSN)
Примечания : Cited References:83. - Open Access funding enabled and organized by Projekt DEAL.
Предметные рубрики: FRESH-WATER
SEASONAL-CHANGES
CARBON
LAKE
DECOMPOSITION
DEGRADATION
Аннотация: Carbon turnover in aquatic environments is dependent on biochemical properties of organic matter (OM) and its degradability by the surrounding microbial community. Non-additive interactive effects represent a mechanism where the degradation of biochemically persistent OM is stimulated by the provision of bioavailable OM to the degrading microbial community. Whilst this is well established in terrestrial systems, whether it occurs in aquatic ecosystems remains subject to debate. We hypothesised that OM from zooplankton carcasses can stimulate the degradation of biochemically persistent leaf material, and that this effect is influenced by the daphnia:leaf OM ratio and the complexity of the degrading microbial community. Fresh Daphnia magna carcasses and C-13-labelled maize leaves (Zea mays) were incubated at different ratios (1:1, 1:3 and 1:5) alongside either a complex microbial community (50 mu m) or solely bacteria (0.8 mu m). C-13 stable-isotope measurements of CO2 analyses were combined with phospholipid fatty acids (PLFA) analysis and DNA sequencing to link metabolic activities, biomass and taxonomic composition of the microbial community. Our experiments indicated a significantly higher respiration of leaf-derived C when daphnia-derived OM was most abundant (i.e. daphnia:leaf OM ratio of 1:1). This process was stronger in a complex microbial community, including eukaryotic microorganisms, than a solely bacterial community. We concluded that non-additive interactive effects were a function of increased C-N chemodiversity and microbial complexity, with the highest net respiration to be expected when chemodiversity is high and the degrading community complex. This study indicates that identifying the interactions and processes of OM degradation is one important key for a deeper understanding of aquatic and thus global carbon cycle.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Kazantseva E. A.
Заглавие : Constructing Slow-Release Metribuzin Formulations by Co-extrusion of the Pesticide with Poly-?-Caprolactone
Место публикации : Macromol. Sympos.: Wiley-VCH Verlag, 2021. - Vol. 395, Is. 1. - Ст.2000283. - ISSN 10221360 (ISSN), DOI 10.1002/masy.202000283
Аннотация: A simple and low-cost method of obtaining slow-release pesticide formulations is proposed by co-extrusion of a herbicide metribuzin with a low-melting biodegradable polyester poly-?-caprolactone, at a temperature above the melting points of both components. Formulations containing 10%, 20%, and 40% herbicide are prepared. Metribuzin release in water during 7 days of exposition reached 81% from the formulations with the 10% loading and 96% from the specimens with the 40% herbicide loading. Biodegradation and pesticide release from the polymer constructs are studied in the model soil for 14 weeks. Degradation rates of the specimens increased with an increase in pesticide content: between 9% for the 10%-loaded specimen and 20% for the 40%-loaded specimen over 14 weeks. The release of metribuzin from the specimens with the 10–20% and 40% loadings reached 37–38% and 55%, respectively; thus, taking into account soil degradation of the herbicide, the herbicide content in soil reached 23–25% and 33%, respectively, of the initially loaded into the polymer matrix. The used approach is promising to obtain long-term release formulations for soil application. © 2021 Wiley-VCH GmbH
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin, Anatoly Nikolayevich, Kazantseva, Eugenia Andreevna
Заглавие : Constructing Slow-Release Metribuzin Formulations by Co-extrusion of the Pesticide with Poly-epsilon-Caprolactone
Колич.характеристики :3 с
Коллективы : Government of the Russian Federation [220, 074-02-2018-328]
Место публикации : Macromol. Symp.: WILEY-V C H VERLAG GMBH, 2021. - Vol. 395: 4th International Conference on Progress on Polymers and Composites (NOV 26-28, 2020, ELECTR NETWORK), Is. 1. - Ст.2000283. - ISSN 1022-1360, DOI 10.1002/masy.202000283. - ISSN 1521-3900(eISSN)
Примечания : Cited References:6. - This study was financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning".
Аннотация: A simple and low-cost method of obtaining slow-release pesticide formulations is proposed by co-extrusion of a herbicide metribuzin with a low-melting biodegradable polyester poly-epsilon-caprolactone, at a temperature above the melting points of both components. Formulations containing 10%, 20%, and 40% herbicide are prepared. Metribuzin release in water during 7 days of exposition reached 81% from the formulations with the 10% loading and 96% from the specimens with the 40% herbicide loading. Biodegradation and pesticide release from the polymer constructs are studied in the model soil for 14 weeks. Degradation rates of the specimens increased with an increase in pesticide content: between 9% for the 10%-loaded specimen and 20% for the 40%-loaded specimen over 14 weeks. The release of metribuzin from the specimens with the 10-20% and 40% loadings reached 37-38% and 55%, respectively; thus, taking into account soil degradation of the herbicide, the herbicide content in soil reached 23-25% and 33%, respectively, of the initially loaded into the polymer matrix. The used approach is promising to obtain long-term release formulations for soil application.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin, Anatoly N., Kazantseva, Eugenia A.
Заглавие : Constructing slow-release formulations of herbicide metribuzin using its co-extrusion with biodegradable polyester poly-epsilon-caprolactone
Колич.характеристики :10 с
Коллективы : Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation [220]
Место публикации : J. Environ. Sci. Health Part B-Pestic. Contam. Agric. Wastes: TAYLOR & FRANCIS INC, 2021. - Article in press. - ISSN 0360-1234, DOI 10.1080/03601234.2021.1911206. - ISSN 1532-4109(eISSN)
Примечания : Cited References:43. - This study was financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning".
Аннотация: Different technologies to prepare long term pesticide forms include polymer coating, preparing composites and encapsulating pesticides in nanoparticles. A simple and low-cost method was proposed to obtain slow-release formulations by co-extrusion of a pesticide with a biodegradable polymer at a temperature above the melting points of both components. A herbicide metribuzin and low-melting polyester poly-epsilon-caprolactone were chosen for this work. Formulations containing 10%, 20%, and 40% herbicide were prepared. During 7 days of their exposition in water, it was released from 81% to 96% of initially loaded metribuzin; the highest release was detected for 40%-loaded forms. Biodegradation of the constructs and pesticide release were further studied in the model soil. Degradation rates of the specimens increased with an increase in pesticide content, from 9% to 20% over 14 weeks for the 10%/20%-loaded and the 40%-loaded specimens, respectively. The release of metribuzin reached, respectively, 37-38% and 55%. The herbicide content in soil was lower due to its partial degradation in soil; it reached 23-25% and 33%, respectively, from initially loaded into the polymer matrix. Release kinetics of metribuzin in water as in soil best fitted the First-order model. The used approach is promising for obtaining long-term release formulations for soil applications.
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11.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Kiselev E. G., Zhila N. O., Volova T. G.
Заглавие : Biodegradable polymers - Perspectives and applications in agriculture
Место публикации : IOP Conference Series: Earth and Environmental Science: IOP Publishing Ltd, 2021. - Vol. 689: 2020 International Conference on Germany and Russia: Ecosystems Without Borders, EcoSystConfKlgtu 2020 (5 October 2020 through 10 October 2020, ) Conference code: 167944, Is. 1. - Ст.012036. - , DOI 10.1088/1755-1315/689/1/012036
Аннотация: The paper presents a brief overview of the results of the implementation of the project "Agropreparations of the new generation: a strategy of construction and realization". The first part contains the analysis of the growth of the wild-type strain Cupriavidus necator B-10646 (formerly eutrophus) and the synthesis of polyhydroxyalkanoates by this strain on various substrates: glycerol, palm oil, Siberian oil seed, sunflower seed oils, and oleic acid. On refined glycerin, a highly productive process is implemented when scaling up, allowing to obtain 128 ± 11 g / L PHA. Evaluation of oils has shown that palm oil is the best carbon substrate. The second part presents the results of the development of environmentally friendly slow-release pesticide formulations. They are a degradable matrix of poly-3-hydroxybutyrate mixed with natural materials (peat, clay, wood flour), into which a pesticide (metribuzin, tribenuron-methyl, fenoxaprop-P-ethyl, azoxystrobin, epoxiconazole, and tebuconazole) has been. The developed preparations showed high activity against pathogenic fungi and weeds and had a much weaker negative effect on the soil microflora. Studies of the degradation of the developed preparations and the release of pesticides into the soil confirm their effectiveness over a long period of time, up to 90 days. © Published under licence by IOP Publishing Ltd.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Thomas, Sabu, Shumilova A. A., Kiselev E. G., Baranovsky, S., V, Vasiliev A. D., Nemtsev, I., V, Kuzmin, Andrei Petrovich, Sukovatyi A. G., Avinash, R. Pai, Volova T. G.
Заглавие : Thermal, mechanical and biodegradation studies of biofiller based poly-3-hydroxybutyrate biocomposites
Колич.характеристики :12 с
Коллективы : Government of the Russian Federation [220]; Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]
Место публикации : Int. J. Biol. Macromol.: ELSEVIER, 2020. - Vol. 155. - С. 1373-1384. - ISSN 0141-8130, DOI 10.1016/j.ijbiomac.2019.11.112. - ISSN 1879-0003(eISSN)
Примечания : Cited References:38. - This studywas financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning".; The surface of the samples was investigated using a scanning electron microscope Hitachi TM-3000 in the Joint Instrument Use Center at the Krasnoyarsk Scientific Center of Siberian Branch of Russian Academy of Sciences.
Предметные рубрики: FORMULATIONS
POLYHYDROXYALKANOATES
POLYHYDROXYBUTYRATE
SOIL
Аннотация: Biodegradable poly-3-hydroxybutyrate [P(3HB)] and natural fillers - clay, peat, and birch wood flour - were used to prepare powdered composites to form pellets and granules. Pellets were produced by cold pressing of polymer and filler powder whereas granules were produced from the powders wetted with ethanol. Characterization techniques like IR spectroscopy, differential scanning calorimetry, X-ray analysis, mechanical analysis and electron microscopy were employed to study the properties of the initial P(3HB) and fillers and the composites. Analysis of the IR spectra of the composites showed the absence of chemical bonds between the components, i.e. the composites were physical mixtures. Young's moduli of the pellets prepared from initial materials varied considerably, and the highest value was obtained for P(3HB) pellets (350 MPa). Studies of biodegradation of composite pellets and granules in the soil for 35 days showed that the residual mass of the pellets had decreased to 68% for P (3HB); 56.4% for P(3HB)/peat; 67% for P(3HB)/wood flour, and 64% for P(3HB)/clay; granules exhibited a similar mass loss, residual mass of the granules of P(3HB) was 68.4%, P(3HB)/peat 46.4%; P(3HB)/wood flour 77%, and P (3HB)/clay 74%. This shows the significance of the material as an eco-friendly composite without sacrificing its mechanical properties. (C) 2019 Published by Elsevier B.V.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev, Egor, Lipka, Oksana, Karimov, Bakhtiyor, Krylenko, Marina, Elias, Victoria, Pinto, Isabel Sousa, Alizade, Valida, Anker, Yaakov, Feest, Alan, Kuznetsova, Daria, Mader, Andre, Salimov, Rashad, Fischer, Markus
Заглавие : Overview of past, current, and future ecosystem and biodiversity trends of inland saline lakes of Europe and Central Asia
Колич.характеристики :15 с
Место публикации : Inland Waters: TAYLOR & FRANCIS LTD, 2020. - Article in press. - ISSN 2044-2041, DOI 10.1080/20442041.2020.1772034. - ISSN 2044-205X(eISSN)
Примечания : Cited References:123
Предметные рубрики: ARAL SEA
SHALLOW LAKES
SALT LAKES
WATER-LEVEL
HISTORY
Аннотация: This review of trends in inland saline lakes of Europe and Central Asia is based on the relevant section of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) Regional Assessment Report for Europe and Central Asia (ECA). We assessed the present status of ECA saline lakes and the effects of direct drivers (climate change, land use, pollution, resource exploitation, invasive species) on ecosystem health and biodiversity. We also assessed past, current and future trends using habitat area and degradation, species richness, and endangered species as indicators. No uniform scenario is applicable to saline lakes in the region. The desiccation of the Aral Sea is caused mainly by land use change and water extraction. In the Caspian Sea, river modifications, water pollution, overfishing and poaching, and species invasions have led to a decrease in species richness and have threatened endemic species. Although trends for smaller saline lakes vary, our analysis demonstrates that land use change, over-exploitation, and pollution are more important direct drivers of ecosystem health and biodiversity than climate change. The establishment of baseline biodiversity values for saline lakes is, however, complicated because biodiversity and the food-web structure are variable and depend strongly on salinity. Thus, there is a need to classify the ecological quality, biodiversity and ecosystem services of saline lakes along a salinity gradient. The improvement of water management and reuse of water, conservation measures, and introduction of climate-smart agriculture are basic conditions for the sustainable use of saline lakes in the region.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prudnikova, Svetlana, Streltsova, Nadezhda, Volova, Tatiana
Заглавие : The effect of the pesticide delivery method on the microbial community of field soil
Колич.характеристики :17 с
Коллективы : Ministry of Science and Higher Education of the Russian Federation, project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]
Место публикации : Environ. Sci. Pollut. Res.: SPRINGER HEIDELBERG, 2020. - Article in press. - ISSN 0944-1344, DOI 10.1007/s11356-020-11228-7. - ISSN 1614-7499(eISSN)
Примечания : Cited References:119. - This study was financially supported by the Ministry of Science and Higher Education of the Russian Federation, project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328).
Предметные рубрики: CONTROLLED-RELEASE
2,4-DICHLOROPHENOXYACETIC ACID
DEGRADATION
Аннотация: The study deals with the effects of herbicides (metribuzin, tribenuron-methyl, fenoxaprop-P-ethyl) and fungicides (tebuconazole, epoxiconazole, azoxystrobin) applied to soil as free pesticides or as slow release formulations embedded in a biodegradable composite matrix on the structure of the soil microbial community. The matrix consisted of a natural biopolymer poly-3-hydroxybutyrate [P(3HB)] and a filler-one of the natural materials (peat, clay, and wood flour). The soil microbial community was characterized, including the major eco-trophic groups of bacteria, dominant taxa of bacteria and fungi, and primary P(3HB)-degrading microorganisms, such asPseudomonas,Bacillus,Pseudarthrobacter,Streptomyces,Penicillium, andTalaromyces. The addition of free pesticides adversely affected the abundance of soil microorganisms; the decrease varied from 1.4 to 56.0 times for different types of pesticides. The slow release pesticide formulations, in contrast to the free pesticides, exerted a much weaker effect on soil microorganisms, no significant inhibition in the abundance of saprotrophic bacteria was observed, partly due to the positive effects of the composite matrix (polymer/natural material), which was a supplementary substrate for microorganisms. The slow release fungicide formulations, like the free fungicides, reduced the total abundance of fungi and inhibited the development of the phytopathogensFusariumandAlternaria. Thus, slow release formulations of pesticides preserve the bioremediation potential of soil microorganisms, which are the main factor of removing xenobiotics from the biosphere.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova, Tatiana, Prudnikova, Svetlana, Boyandin, Anatoly, Zhila, Natalia, Kiselev, Evgeniy, Shumilova, Anna, Baranovskiy, Sergey, Demidenko, Aleksey, Shishatskaya, Ekaterina, Thomas, Sabu
Заглавие : Constructing Slow-Release Fungicide Formulations Based on Poly(3-hydroxybutyrate) and Natural Materials as a Degradable Matrix
Колич.характеристики :12 с
Коллективы : Project "Agro-preparations of the New Generation: A Strategy of Construction and Realization" [074-02-2018-328]; Resolution 220 of the Government of the Russian Federation of April 9, 2010, "On Measures Designed To Attract Leading Scientists to the Russian Institutions of Higher Learning"
Место публикации : J. Agric. Food Chem.: AMER CHEMICAL SOC, 2019. - Vol. 67, Is. 33. - С. 9220-9231. - ISSN 0021-8561, DOI 10.1021/acs.jafc.9b01634. - ISSN 1520-5118(eISSN)
Примечания : Cited References:52. - This study was financially supported by Project "Agro-preparations of the New Generation: A Strategy of Construction and Realization" (Agreement 074-02-2018-328) in accordance with Resolution 220 of the Government of the Russian Federation of April 9, 2010, "On Measures Designed To Attract Leading Scientists to the Russian Institutions of Higher Learning".
Предметные рубрики: BIODEGRADABLE POLY-3-HYDROXYBUTYRATE
CHITOSAN NANOPARTICLES
Аннотация: Slow-release fungicide formulations (azoxystrobin, epoxiconazole, and tebuconazole) shaped as pellets and granules in a matrix of biodegradable poly(3-hydroxybutyrate) and natural fillers (clay, wood flour, and peat) were constructed. Infrared spectroscopy showed no formation of chemical bonds between components in the experimental formulations. The formulations of pesticides had antifungal activity against Fusarium verticillioides in vitro. A study of biodegradation of the experimental fungicide formulations in the soil showed that the degradation process was mainly influenced by the type of formulation without significant influence of the type of filler. More active destruction of the granules led to a more rapid accumulation of fungicides in the soil. The content of fungicides present in the soil as a result of degradation of the formulations and fungicide release was determined by their solubility. Thus, all formulations are able to function in the soil for a long time, ensuring gradual and sustained delivery of fungicides.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mogilnaya, Olga, Ronzhin, Nikita, Artemenko, Karina, Bondar, Vladimir
Заглавие : Nanodiamonds as an effective adsorbent for immobilization of extracellular peroxidases from luminous fungus Neonothopanus nambi to construct a phenol detection system
Колич.характеристики :9 с
Коллективы : Russian Academy of Sciences [0356-2016-0709]
Место публикации : Biocatal. Biotransform.: TAYLOR & FRANCIS LTD, 2019. - Vol. 37, Is. 2. - С. 97-105. - ISSN 1024-2422, DOI 10.1080/10242422.2018.1472586. - ISSN 1029-2446(eISSN)
Примечания : Cited References:50. - This work was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences [project no. 0356-2016-0709].
Предметные рубрики: CARBON NANOTUBES
ARMILLARIA-BOREALIS
LIGHT-EMISSION
DEGRADATION
Ключевые слова (''Своб.индексиров.''): nanodiamonds--immobilization--luminous fungus--beta-glucosidase--peroxidase--indicator system
Аннотация: Modified nanodiamonds (MNDs) produced by detonation synthesis can be used as an effective adsorbent to immobilize extracellular peroxidases of the luminous basidiomycete Neonothopanus nambi. The enzymes are firmly immobilized on MND particles and exhibit catalytic activity. The indicator system (the MND-enzyme complex) reused many times retains its ability to catalyze reaction of co-oxidation of phenol and 4-aminoantipirine in the presence of hydrogen peroxide and remains functionally active during long-term storage (for 1 month or longer) in aqueous suspensions at 4 degrees C. MNDs and enzymes of higher fungi can be effectively used to construct new reusable indicator systems for analytical applications such as monitoring contamination of aquatic environments by phenolic compounds.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Thomas S., Shumilova A. A., Kiselev E. G., Baranovsky S. V., Vasiliev A. D., Nemtsev I. V., Kuzmin A. P., Sukovatyi A. G., Avinash R. P., Volova T. G.
Заглавие : Thermal, mechanical and biodegradation studies of biofiller based poly-3-hydroxybutyrate biocomposites
Место публикации : Int. J. Biol. Macromol.: Elsevier B.V., 2019. - Article in press. - ISSN 01418130 (ISSN) , DOI 10.1016/j.ijbiomac.2019.11.112
Аннотация: Biodegradable poly-3-hydroxybutyrate [P(3HB)] and natural fillers - clay, peat, and birch wood flour – were used to prepare powdered composites to form pellets and granules. Pellets were produced by cold pressing of polymer and filler powder whereas granules were produced from the powders wetted with ethanol. Characterization techniques like IR spectroscopy, differential scanning calorimetry, X-ray analysis, mechanical analysis and electron microscopy were employed to study the properties of the initial P(3HB) and fillers and the composites. Analysis of the IR spectra of the composites showed the absence of chemical bonds between the components, i.e. the composites were physical mixtures. Young's moduli of the pellets prepared from initial materials varied considerably, and the highest value was obtained for P(3HB) pellets (350 MPa). Studies of biodegradation of composite pellets and granules in the soil for 35 days showed that the residual mass of the pellets had decreased to 68% for P(3HB); 56.4% for P(3HB)/peat; 67% for P(3HB)/wood flour, and 64% for P(3HB)/clay; granules exhibited a similar mass loss, residual mass of the granules of P(3HB) was 68.4%, P(3HB)/peat 46.4%; P(3HB)/wood flour 77%, and P(3HB)/clay 74%. This shows the significance of the material as an eco-friendly composite without sacrificing its mechanical properties. © 2018
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kiselev E. G., Boyandin A. N., Zhila N. O., Prudnikova S. V., Shumilova A. A., Baranovskiy S. V., Shishatskaya E. I., Thomas S., Volova T. G.
Заглавие : Constructing sustained-release herbicide formulations based on poly-3-hydroxybutyrate and natural materials as a degradable matrix
Место публикации : Pest Manage. Sci.: John Wiley and Sons Ltd, 2019. - Article in press. - ISSN 1526498X (ISSN), DOI 10.1002/ps.5702
Аннотация: BACKGROUND: The purpose of the present study was to develop ecofriendly herbicide formulations. Its main aim was to develop and investigate slow-release formulations of herbicides (metribuzin, tribenuron-methyl, and fenoxaprop-P-ethyl) of different structure, solubility, and specificity, which were loaded into a degradable matrix of poly-3-hydroxybutyrate (P(3HB)) blended with available natural materials (peat, clay, and wood flour). RESULTS: Differences in the structure and physicochemical properties of the formulations were studied depending on the type of the matrix. Herbicide release and accumulation in soil were associated with the solubility of the herbicide. Fourier-transform infrared spectroscopy showed that no chemical bonds were formed between the components in the experimental formulations. Degradation of the formulations in agro-transformed soil in laboratory conditions was chiefly influenced by the shape of the specimens (granules or pellets) while the effect of the type of filler (peat, clay, or wood flour) was insignificant. The use of granules enabled more rapid accumulation of the herbicides in soil: their peak concentrations were reached after 3 weeks of incubation while the concentrations of the herbicides released from the pellets were the highest after 5–7 weeks. Loading of the herbicides into the polymer matrix composed of the slowly degraded P(3HB) and natural materials enabled both sustained function of the formulations in soil (lasting between 1.5 and ?3 months) and stable activity of the otherwise rapidly inactivated herbicides such as tribenuron-methyl and fenoxaprop-P-ethyl. CONCLUSION: The experimental herbicide formulations enabled slow release of the active ingredients to soil. © 2019 Society of Chemical Industry. © 2019 Society of Chemical Industry
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shishatskaya E., Menzyanova N., Zhila N., Prudnikova S., Volova T., Thomas S.
Заглавие : Toxic effects of the fungicide tebuconazole on the root system of fusarium-infected wheat plants
Место публикации : Plant Physiol. Biochem.: Elsevier Masson SAS, 2018. - Vol. 132. - С. 400-407. - ISSN 09819428 (ISSN) , DOI 10.1016/j.plaphy.2018.09.025
Ключевые слова (''Своб.индексиров.''): border cells--carbonylated proteins--free proline--fusarium--malondialdehyde--tebuconazole
Аннотация: The study investigates toxic effects of the fungicide tebuconazole (TEB) on Fusarium-infected wheat (Triticum aestivum) plants based on the morphological characteristics of root apices and changes in the integrated parameters of redox homeostasis, including the contents of free proline and products of peroxidation of proteins (carbonylated proteins, CP) and lipids (malondialdehyde, MDA) in roots. In two-day-old wheat sprouts infected by Fusarium graminearum, the levels of proline, CP, and border cells of root apices are higher than in roots of uninfected sprouts by a factor of 1.4, 8.0, and 3, respectively. The triazole fungicide tebuconazole (TEB) at the concentrations of 0.01, 0.10, and 1.00 ?g ml?1 of medium causes a dose-dependent decrease in the number of border cells. The study of the effects of TEB and fusarium infection on wheat plants in a 30-day experiment shows that the effect of the fungicide TEB on redox homeostasis in wheat roots varies depending on the plant growth stage and is significantly different in ecosystems with soil and plants infected by Fusarium phytopathogens. The study of the morphology of root apices shows that the toxic effects of TEB and fusarium infection are manifested in the destructive changes in root apices and the degradation of the root tip mantle. © 2018 Elsevier Masson SAS
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakova O. V., Gladyshev M. I., Fonvielle J. A., Ganzert L., Hornick T., Grossart H. -P.
Заглавие : Effects of zooplankton carcasses degradation on freshwater bacterial community composition and implications for carbon cycling
Место публикации : Environ. Microbiol.: Blackwell Publishing Ltd, 2018. - Article in press. - ISSN 14622912 (ISSN) , DOI 10.1111/1462-2920.14418
Аннотация: Non-predatory mortality of zooplankton provides an abundant, yet, little studied source of high quality labile organic matter (LOM) in aquatic ecosystems. Using laboratory microcosms, we followed the decomposition of organic carbon of fresh 13C-labelled Daphnia carcasses by natural bacterioplankton. The experimental setup comprised blank microcosms, that is, artificial lake water without any organic matter additions (B), and microcosms either amended with natural humic matter (H), fresh Daphnia carcasses (D) or both, that is, humic matter and Daphnia carcasses (HD). Most of the carcass carbon was consumed and respired by the bacterial community within 15 days of incubation. A shift in the bacterial community composition shaped by labile carcass carbon and by humic matter was observed. Nevertheless, we did not observe a quantitative change in humic matter degradation by heterotrophic bacteria in the presence of LOM derived from carcasses. However, carcasses were the main factor driving the bacterial community composition suggesting that the presence of large quantities of dead zooplankton might affect the carbon cycling in aquatic ecosystems. Our results imply that organic matter derived from zooplankton carcasses is efficiently remineralized by a highly specific bacterial community, but does not interfere with the bacterial turnover of more refractory humic matter. © 2018 Society for Applied Microbiology and John Wiley & Sons Ltd.
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