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A study of the properties and efficacy of microparticles based on P(3HB) and P(3HB/3HV) loaded with herbicides / R. Vijayamma, H. J. Maria, S. Thomas [et al.] // J. Appl. Polym. Sci. - 2021. - Ст. e51756, DOI 10.1002/app.51756. - Cited References:57. - This work was 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". Instruments of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center Krasnoyarsk Science Center SB RAS were used. . - Article in press. - ISSN 0021-8995. - ISSN 1097-4628

РУБ Polymer Science
Рубрики:
FENOXAPROP-P-ETHYL
CONTROLLED-RELEASE
BIODEGRADABLE
Кл.слова (ненормированные):
biodegradable -- drug delivery systems -- microparticles
Аннотация: The wide use of pesticides in agriculture has caused uncontrolled distribution of these chemicals in the environment, calling for the development and investigation of new environmentally friendly formulations, which would reduce human impact on nature. In the present study, the metribuzin (MET), tribenuron-methyl (TBM), and fenoxaprop-P-ethyl (FPE) herbicides were encapsulated in microparticles of degradable microbial polymers - polyhydroxyalkanoates (PHAs) - of two types - poly-3-hydroxybutyrate [P(3HB)] and poly(3-hydroxybutyrate-co-3-hydroxyvalerate [P(3HB/3HV)]. The use of P(3HB) resulted in higher yields of microparticles (63% to 79%) and larger sizes of the particles, whose average diameter was 0.60 +/- 0.06-0.75 +/- 0.11 mu m, while the average diameter of copolymer particles varied between 0.43 +/- 0.12 and 0.55 +/- 0.05 mu m. Encapsulation efficiency was rather determined by the type of herbicide and its solubility, varying from 24.7% to 48.2%. In vitro herbicide release from microparticles to water was affected by herbicide solubility and PHA chemical composition. The readily soluble MET showed the highest release rate, and over 30 days, 64% and 78% of the encapsulated amounts were released from P(3HB) and P(3HB/3HV) microparticles, respectively. High herbicidal activity of microparticles loaded with metribuzin and tribenuron-methyl was demonstrated in the laboratory stands of the Elsholtzia ciliata weed plant.

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Держатели документа:
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Krasnoyarsk, Russia.
Mahatma Gandhi Univ, Int & Inter Univ Ctr Nanosci & Nanotechnol, Kottayam, Kerala, India.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Inst Biophys SB, Krasnoyarsk, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Res Equipment Fed Res Ctr, Krasnoyarsk Reg Ctr, Krasnoyarsk, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, LV Kirensky Inst Phys, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Sci Lab, Krasnoyarsk, Russia.

Доп.точки доступа:
Vijayamma, Raji; Maria, Hanna J.; Thomas, Sabu; Shishatskaya, Ekaterina I.; Kiselev, Evgeniy G.; Nemtsev, Ivan V.; Sukhanova, Anna A.; Volova, Tatiana G.; Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation [220]

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A study of the properties and efficacy of microparticles based on P(3HB) and P(3HB/3HV) loaded with herbicides / R. Vijayamma, H. J. Maria, S. Thomas [et al.] // J. Appl. Polym. Sci. - 2021, DOI 10.1002/app.51756 . - Article in press. - ISSN 0021-8995
Кл.слова (ненормированные):
biodegradable -- drug delivery systems -- microparticles -- Agricultural robots -- Controlled drug delivery -- Solubility -- Targeted drug delivery -- Weed control -- 3-Hydroxybutyrate -- Average diameter -- Biodegradable -- Drug-delivery systems -- Human impact -- Metribuzin -- Micro particles -- Poly-3-hydroxybutyrate -- Polyhydroxyalkanoates -- Property -- Herbicides
Аннотация: The wide use of pesticides in agriculture has caused uncontrolled distribution of these chemicals in the environment, calling for the development and investigation of new environmentally friendly formulations, which would reduce human impact on nature. In the present study, the metribuzin (MET), tribenuron-methyl (TBM), and fenoxaprop-P-ethyl (FPE) herbicides were encapsulated in microparticles of degradable microbial polymers – polyhydroxyalkanoates (PHAs) – of two types – poly-3-hydroxybutyrate [P(3HB)] and poly(3-hydroxybutyrate-co-3-hydroxyvalerate [P(3HB/3HV)]. The use of P(3HB) resulted in higher yields of microparticles (63% to 79%) and larger sizes of the particles, whose average diameter was 0.60 ± 0.06–0.75 ± 0.11 ?m, while the average diameter of copolymer particles varied between 0.43 ± 0.12 and 0.55 ± 0.05 ?m. Encapsulation efficiency was rather determined by the type of herbicide and its solubility, varying from 24.7% to 48.2%. In vitro herbicide release from microparticles to water was affected by herbicide solubility and PHA chemical composition. The readily soluble MET showed the highest release rate, and over 30 days, 64% and 78% of the encapsulated amounts were released from P(3HB) and P(3HB/3HV) microparticles, respectively. High herbicidal activity of microparticles loaded with metribuzin and tribenuron-methyl was demonstrated in the laboratory stands of the Elsholtzia ciliata weed plant. © 2021 Wiley Periodicals LLC.

Scopus
Держатели документа:
Institute of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russian Federation
International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, India
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
L.V. Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Scientific Laboratory, Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Vijayamma, R.; Maria, H. J.; Thomas, S.; Shishatskaya, E. I.; Kiselev, E. G.; Nemtsev, I. V.; Sukhanova, A. A.; Volova, T. G.

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Antifungal activity of P3HB microparticles containing tebuconazole / A. M. Shershneva [et al.] // J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes. - 2019, DOI 10.1080/03601234.2018.1550299 . - Article in press. - ISSN 0360-1234
Кл.слова (ненормированные):
Antifungal activity -- encapsulation -- microparticles -- poly-3-hydroxybutyrate -- tebuconazole -- Agricultural chemicals -- Emulsification -- Encapsulation -- Fungicides -- Anti-fungal activity -- Average diameter -- Encapsulation efficiency -- Fusarium moniliforme -- Micro-particles -- Phytopathogenic fungi -- Poly-3-hydroxybutyrate -- Tebuconazole -- Fungi
Аннотация: In this study, tebuconazole (TEB)-loaded poly-3-hydroxybutyrate (P3HB)-based microparticles were developed and comprehensively characterized. TEB-loaded microparticles with the initial loading amounts of the fungicide of 10, 25, and 50% of the polymer mass (TEB 10, TEB 25, and TEB 50%) were prepared using emulsion technique. Encapsulation efficiency of TEB varied from 59 to 86%. As the loading amount was increased, the average diameter of microparticles increased too, from 41.3 to 71.7 µm, while zeta potential was not influenced by TEB loading, varying between –32.6 and –35.7 mV. TEB was gradually released from the microparticles to the model medium, and after 60 d, from 25 to 43% of TEB was released depending on the content of the encapsulated fungicide. The data obtained from in vitro TEB release were fitted to different mathematical models. It was shown that the release profiles of TEB could be best explained by the Zero-order, Higuchi, and Hixson–Crowell models. The antifungal activity of the P3HB/TEB microparticles against phytopathogenic fungi Fusarium moniliforme and Fusarium solani was demonstrated by in vitro tests conducted in Petri dishes. Thus, hydrophobic agrochemicals (TEB) can be effectively encapsulated into P3HB microparticles to construct slow-release formulations. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.

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Держатели документа:
Siberian Federal University, Institute of Fundamental Biology and Biotechnology, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Shershneva, A. M.; Murueva, A. V.; Zhila, N. O.; Volova, T. G.

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Biodegradable polymers - Perspectives and applications in agriculture / E. G. Kiselev, N. O. Zhila, T. G. Volova // 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
Кл.слова (ненормированные):
Biodegradable polymers -- Ecosystems -- Fungi -- Glycerol -- Monounsaturated fatty acids -- Oilseeds -- Pesticides -- Substrates -- Sunflower oil -- Fenoxaprop-p-ethyl -- Natural materials -- Pesticide formulations -- Poly-3-hydroxybutyrate -- Polyhydroxyalkanoates -- Productive process -- Strategy of constructions -- Various substrates -- Palm oil
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.

Scopus
Держатели документа:
School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russian Federation
Laboratory of Chemoautotrophic Biosynthesis, Institute of Biophysics, SB, RAS, Federal Research Center, Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kiselev, E. G.; Zhila, N. O.; Volova, T. G.

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РУБ Environmental Sciences + Public, Environmental & Occupational Health
Рубрики:
SYNTHASE-INHIBITING HERBICIDES
CHLOROPHYLL FLUORESCENCE
RELEASE
Кл.слова (ненормированные):
Metribuzin -- tribenuron-methyl -- degradable P(3HB) -- weed growth -- inhibition -- photosynthetic activity
Аннотация: The present study addresses the herbicidal activity and biological effects of the metribuzin (MET) and tribenuron-methyl (TBM) herbicides used to control various weed species (Amaranthus retroflexus, Sinapis arvensis,andLeucanthemum maximum). The effects of the free herbicides and the herbicides embedded in granules of degradable polymer poly-3-hydroxybutyrate [P(3HB)] blended with birch wood flour were compared. Metribuzin, regardless of the form, caused 100% mortality of the three weeds by day 21. The herbicidal activity of tribenuron-methyl was lower than that of metribuzin, but the embedded TBM was superior to the free herbicide in the length and strength of its action on the weeds. Both metribuzin forms dramatically decreased the main parameters of fluorescence: maximum quantum yield of photosystem-II [Y(II)(max)], maximum quantum yield of non-photochemical quenching [Y(NPQ)(max)], and maximum rate of non-cyclic electron transport [ETRmax] and concentrations of chlorophyllaandb. The effect of the embedded TBM on the photosynthetic activity of the weeds was lower in the first two weeks of the growth of herbicide-treated plants but lasted longer than the effect of the free TBM and increased over time. Embedding of metribuzin in the matrix of degradable blend did not decrease its herbicidal activity.

WOS
Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, Inst Biophys SB RAS, Krasnoyarsk, Russia.

Доп.точки доступа:
Volova, Tatiana; Baranovsky, Sergey; Petrovskaya, Olga; Shumilova, Anna; Sukovatyi, Alexey; Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning" [220]

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Biological effects of the free and embedded metribuzin and tribenuron-methyl herbicides on various cultivated weed species / T. Volova, S. Baranovsky, O. Petrovskaya [et al.] // J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes. - 2020, DOI 10.1080/03601234.2020.1807835 . - Article in press. - ISSN 0360-1234
Кл.слова (ненормированные):
degradable P(3HB) -- Metribuzin -- photosynthetic activity -- tribenuron-methyl -- weed growth inhibition -- Electron transport properties -- Photosynthesis -- Plants (botany) -- Quantum chemistry -- Quantum yield -- Weed control -- Biological effects -- Cyclic electron transport -- Degradable polymers -- Herbicidal activity -- Main parameters -- Non-photochemical quenching -- Photosynthetic activity -- Poly-3-hydroxybutyrate -- Herbicides
Аннотация: The present study addresses the herbicidal activity and biological effects of the metribuzin (MET) and tribenuron-methyl (TBM) herbicides used to control various weed species (Amaranthus retroflexus, Sinapis arvensis, and Leucanthemum maximum). The effects of the free herbicides and the herbicides embedded in granules of degradable polymer poly-3-hydroxybutyrate [P(3HB)] blended with birch wood flour were compared. Metribuzin, regardless of the form, caused 100% mortality of the three weeds by day 21. The herbicidal activity of tribenuron-methyl was lower than that of metribuzin, but the embedded TBM was superior to the free herbicide in the length and strength of its action on the weeds. Both metribuzin forms dramatically decreased the main parameters of fluorescence: maximum quantum yield of photosystem-II [Y(II)max], maximum quantum yield of non-photochemical quenching [Y(NPQ)max], and maximum rate of non-cyclic electron transport [ETRmax] and concentrations of chlorophyll a and b. The effect of the embedded TBM on the photosynthetic activity of the weeds was lower in the first two weeks of the growth of herbicide-treated plants but lasted longer than the effect of the free TBM and increased over time. Embedding of metribuzin in the matrix of degradable blend did not decrease its herbicidal activity. © 2020 Taylor & Francis Group, LLC.

Scopus
Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS,”, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Volova, T.; Baranovsky, S.; Petrovskaya, O.; Shumilova, A.; Sukovatyi, A.

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Constructing herbicide metribuzin sustained-release formulations based on the natural polymer poly-3-hydroxybutyrate as a degradable matrix / T. G. Volova [et al.] // J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes. - 2016. - Vol. 51, Is. 2. - P113-125, DOI 10.1080/03601234.2015.1092833 . - ISSN 0360-1234
Кл.слова (ненормированные):
controlled release -- embedding -- metribuzin -- Poly(3-hydroxybutyrate) -- slow-release formulations -- Granulation -- Pelletizing -- Weed control -- Controlled release -- embedding -- Metribuzin -- Poly-3-hydroxybutyrate -- Slow release -- Herbicides
Аннотация: Polymer poly(3-hydroxybutyrate) [P(3HB)] has been used as a matrix in slow-release formulations of the herbicide metribuzin (MET). Physical P(3HB)/MET mixtures in the form of solutions, powders, and emulsions were used to construct different metribuzin formulations (films, granules, pellets, and microparticles). SEM, X-Ray, and DSC proved the stability of these formulations incubated in sterile water in vitro for long periods of time (up to 49 days). Metribuzin release from the polymer matrix has been also studied. By varying the shape of formulations (microparticles, granules, films, and pellets), we were able to control the release time of metribuzin, increasing or decreasing it. © 2016 Taylor & Francis Group, LLC.

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Держатели документа:
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Volova, T. G.; Zhila, N. O.; Vinogradova, O. N.; Nikolaeva, E. D.; Kiselev, E. G.; Shumilova, A. A.; Shershneva, A. M.; Shishatskaya, E. I.
Свободных экз. нет
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Constructing slow-release formulations of herbicide metribuzin using its co-extrusion with biodegradable polyester poly-epsilon-caprolactone / A. N. Boyandin, E. A. Kazantseva // J. Environ. Sci. Health Part B-Pestic. Contam. Agric. Wastes. - 2021, DOI 10.1080/03601234.2021.1911206. - 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". . - Article in press. - ISSN 0360-1234. - ISSN 1532-4109

РУБ Environmental Sciences + Public, Environmental & Occupational Health

Кл.слова (ненормированные):
Polycaprolactone -- herbicide -- pesticide -- long-term -- extrusion
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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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, Inst Biophys,Siberian Branch, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Boyandin, Anatoly N.; Kazantseva, Eugenia A.; Boyandin, Anatoly; Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation [220]

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Constructing slow-release formulations of herbicide metribuzin using its co-extrusion with biodegradable polyester poly-ε-caprolactone / A. N. Boyandin, E. A. Kazantseva // J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes. - 2021, DOI 10.1080/03601234.2021.1911206 . - Article in press. - ISSN 0360-1234
Кл.слова (ненормированные):
extrusion -- herbicide -- long-term -- pesticide -- Polycaprolactone -- Biodegradable polymers -- Biodegradation -- Degradation -- Extrusion -- Melting -- Plastic coatings -- Polyesters -- Soils -- Weed control -- Biodegradable polyesters -- Degradation rate -- First-order models -- Long-term release -- Low cost methods -- Partial degradation -- Release kinetics -- Soil applications -- Herbicides
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.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Boyandin, A. N.; Kazantseva, E. A.

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10.

Constructing Slow-Release Fungicide Formulations Based on Poly(3-hydroxybutyrate) and Natural Materials as a Degradable Matrix / T. Volova [et al.] // J. Agric. Food Chem. - 2019. - Vol. 67, Is. 33. - P9220-9231, DOI 10.1021/acs.jafc.9b01634. - 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". . - ISSN 0021-8561. - ISSN 1520-5118

РУБ Agriculture, Multidisciplinary + Chemistry, Applied + Food Science &
Рубрики:
BIODEGRADABLE POLY-3-HYDROXYBUTYRATE
CHITOSAN NANOPARTICLES
Кл.слова (ненормированные):
poly(3-hydroxybutyrate) -- fungicides -- slow-release formulations -- antifungal activity -- degradation -- fungicide release
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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Держатели документа:
Siberian Fed Univ, 79 Svobodnyi Ave, Krasnoyarsk 660041, Russia.
SB RAS, Inst Biophys, Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Mahatma Gandhi Univ, Int & Inter Univ Ctr Nanosci & Nanotechnol, Priyadarshini Hills, Kottayam 686560, Kerala, India.

Доп.точки доступа:
Volova, Tatiana; Prudnikova, Svetlana; Boyandin, Anatoly; Zhila, Natalia; Kiselev, Evgeniy; Shumilova, Anna; Baranovskiy, Sergey; Demidenko, Aleksey; Shishatskaya, Ekaterina; Thomas, Sabu; 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"

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11.

Constructing Slow-Release Metribuzin Formulations by Co-extrusion of the Pesticide with Poly-?-Caprolactone / A. N. Boyandin, E. A. Kazantseva // Macromol. Sympos. - 2021. - Vol. 395, Is. 1. - Ст. 2000283, DOI 10.1002/masy.202000283 . - ISSN 1022-1360
Кл.слова (ненормированные):
extrusion -- herbicides -- long-term -- pesticides -- polycaprolactone -- Biodegradable polymers -- Biodegradation -- Degradation -- Extrusion -- Melting -- Soils -- Weed control -- Biodegradable polyesters -- Caprolactone -- Degradation rate -- Long-term release -- Low cost methods -- Pesticide formulations -- Soil applications -- Soil degradation -- Herbicides
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

Scopus
Держатели документа:
Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Boyandin, A. N.; Kazantseva, E. A.

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12.

Constructing Slow-Release Metribuzin Formulations by Co-extrusion of the Pesticide with Poly-epsilon-Caprolactone / A. N. Boyandin, E. A. Kazantseva // Macromol. Symp. - 2021. - Vol. 395: 4th International Conference on Progress on Polymers and Composites (NOV 26-28, 2020, ELECTR NETWORK), Is. 1. - Ст. 2000283, DOI 10.1002/masy.202000283. - 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". . - ISSN 1022-1360. - ISSN 1521-3900

РУБ Polymer Science

Кл.слова (ненормированные):
extrusion -- herbicides -- long‐ -- term -- pesticides -- polycaprolactone
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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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Inst Biophys, Siberian Branch,Fed Res Ctr, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Boyandin, Anatoly Nikolayevich; Kazantseva, Eugenia Andreevna; Government of the Russian Federation [220, 074-02-2018-328]

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13.

Design of bioluminescent biosensors for assessing contamination of complex matrices / E. N. Esimbekova, V. P. Kalyabina, K. V. Kopylova [et al.] // Talanta. - 2021. - Vol. 233. - Ст. 122509, DOI 10.1016/j.talanta.2021.122509. - Cited References:87. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, to the research project No. 20-44-242001 and Ministry of Science and Higher Education of Russian Federation No. FSRZ-2020-0006. . - ISSN 0039-9140. - ISSN 1873-3573

РУБ Chemistry, Analytical
Рубрики:
SAMPLE PREPARATION
   PESTICIDES
   FOOD
   BIOMOLECULES
   SENSITIVITY
Кл.слова (ненормированные):
Bioluminescent biosensor -- Enzyme inhibition-based assay -- Complex -- matrices -- Pesticides -- Heavy metals
Аннотация: The presence of potentially toxic xenobiotics in complex matrices has become rather the rule than the exception. Therefore, there is a need for highly sensitive inexpensive techniques for analyzing environmental and food matrices for toxicants. Enzymes are selectively sensitive to various toxic compounds, and, thus, they can be used as the basis for detection of contaminants in complex matrices. There are, however, a number of difficulties associated with the analysis of complex matrices using enzyme assays, including the necessity to take into account properties and effects of the natural components of the test media for accurate interpretation of results. The present study describes the six-stage procedure for designing new enzyme sensors intended for assessing the quality of complex matrices. This procedure should be followed both to achieve the highest possible sensitivity of the biosensor to potentially toxic substances and to minimize the effect of the uncontaminated components of complex mixtures on the activity of the biosensor. The proposed strategy has been tested in designing a bioluminescent biosensor for integrated rapid assessment of the safety of fruits and vegetables. The biosensor is based on the coupled enzyme system NAD(P)H:FMN-oxidoreductase and luciferase as the biorecognition element. The study describes methods and techniques for attaining the desired result in each stage. The proposed six-stage procedure for designing bioluminescent enzyme biosensors can be used to design the enzymatic biosensors based on other enzymes.

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Держатели документа:
Siberian Fed Univ, 79 Svobodny Prospect, Krasnoyarsk 660041, Russia.
Inst Biophys SB RAS, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Esimbekova, Elena N.; Kalyabina, Valeriya P.; Kopylova, Kseniya, V; Torgashina, Irina G.; Kratasyuk, Valentina A.; Kopylova, Kseniya; Esimbekova, Elena; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [20-44-242001]; Ministry of Science and Higher Education of Russian Federation [FSRZ-2020-0006]

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14.

Design of bioluminescent biosensors for assessing contamination of complex matrices / E. N. Esimbekova, V. P. Kalyabina, K. V. Kopylova [et al.] // Talanta. - 2021. - Vol. 233. - Ст. 122509, DOI 10.1016/j.talanta.2021.122509. - Cited By :1 . - ISSN 0039-9140
Кл.слова (ненормированные):
Bioluminescent biosensor -- Complex matrices -- Enzyme inhibition-based assay -- Heavy metals -- Pesticides
Аннотация: The presence of potentially toxic xenobiotics in complex matrices has become rather the rule than the exception. Therefore, there is a need for highly sensitive inexpensive techniques for analyzing environmental and food matrices for toxicants. Enzymes are selectively sensitive to various toxic compounds, and, thus, they can be used as the basis for detection of contaminants in complex matrices. There are, however, a number of difficulties associated with the analysis of complex matrices using enzyme assays, including the necessity to take into account properties and effects of the natural components of the test media for accurate interpretation of results. The present study describes the six-stage procedure for designing new enzyme sensors intended for assessing the quality of complex matrices. This procedure should be followed both to achieve the highest possible sensitivity of the biosensor to potentially toxic substances and to minimize the effect of the uncontaminated components of complex mixtures on the activity of the biosensor. The proposed strategy has been tested in designing a bioluminescent biosensor for integrated rapid assessment of the safety of fruits and vegetables. The biosensor is based on the coupled enzyme system NAD(P)H:FMN-oxidoreductase and luciferase as the biorecognition element. The study describes methods and techniques for attaining the desired result in each stage. The proposed six-stage procedure for designing bioluminescent enzyme biosensors can be used to design the enzymatic biosensors based on other enzymes. © 2021 Elsevier B.V.

Scopus
Держатели документа:
Siberian Federal University, 79 Svobodny Prospect, Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Esimbekova, E. N.; Kalyabina, V. P.; Kopylova, K. V.; Torgashina, I. G.; Kratasyuk, V. A.

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15.

Enzymatic bioassay of soil: Sensitivity comparison of mono-, double- And triple-enzyme systems to soil toxicants / O. S. Sutormin [и др.] // Tsitologiya. - 2018. - Vol. 60, Is. 10. - С. 826-829, DOI 10.7868/S0041377118100132 . - ISSN 0041-3771
Кл.слова (ненормированные):
Bacterial luciferase -- Bioluminescent analysis -- Coupled enzyme systems -- Ecological monitoring -- Enzymatic toxicity bioassays -- Lactate dehydrogenase -- NADH:FMN-oxidoreductase -- Soil
Аннотация: In this paper, we have investigated the possibilities of application of enzymatic systems with increasing chain length as a bioassay to evaluate the soil contamination status. The sensitivity of monoenzyme reaction as well as double- and triple-enzyme chains based on NAD(P)H:FMN-oxidoreductase and luciferase of luminous bacteria and lactate dehydrogenase to pesticides and copper ions in water and water extracts from soils were estimated. For this, the toxicological parameter IC 20 reflecting the sensitivity limit of the enzyme system to the to-xicant was used. It was revealed that elongation of the coupled enzyme chain (from mono- to triple-enzyme) increases the sensitivity of the bioassay, in some cases by several orders of magnitude. This pattern can be used as a tool to improve the properties of enzymic bioassays. The effect of extracts from uncontaminated soils of various types on enzymatic systems also differs, which makes possible to design the specialized enzymatic bioassays as well. © 2018 Sankt Peterburg.All rights reserved.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics Siberian Branch of RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Sutormin, O. S.; Kolosova, E. M.; Nemtseva, A. V.; Iskorneva, I. V.; Lisitsa, A. A.; Matvienko, V. S.; Esimbekova, A. N.; Kratasyuk, V. A.

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16.

Enzymatic Biotesting: Scientific Basis and Application / E. N. Esimbekova, I. G. Torgashina, V. P. Kalyabina, V. A. Kratasyuk // Contemp. Probl. Ecol. - 2021. - Vol. 14, Is. 3. - P290-304, DOI 10.1134/S1995425521030069. - Cited References:128. - This study was carried out with financial support from the Russian Foundation for Basic Research, project no. 19-14-50238\19. . - ISSN 1995-4255. - ISSN 1995-4263

РУБ Ecology
Рубрики:
ORGANOPHOSPHORUS PESTICIDES
CHRONIC EXPOSURE
BIOSENSOR
Кл.слова (ненормированные):
biotesting -- enzymatic bioassays -- bioluminescence -- environmental -- monitoring -- pesticides -- heavy metals
Аннотация: The paper provides a review of the current state of research in the field of biotesting, and the problems of environmental studies and ways to solve them are discussed. The basic principles and examples of using enzymes for detecting toxicants in various environmental samples are considered. Based on an analysis of numerous published data, the advantages and limitations, as well as the prospects for using enzymes for performing biotesting tasks, are assessed. A separate section of the review is devoted to bioluminescent enzymatic bioassays developed by the authors and successfully used for environmental monitoring of water, soil, and air. The necessity of developing a battery of enzymatic bioassays is substantiated. It allows one to have the most complete and accurate information about the degree of pollution of environmental objects.

WOS
Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Esimbekova, E. N.; Torgashina, I. G.; Kalyabina, V. P.; Kratasyuk, V. A.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-14-50238\19]

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17.

Enzymatic Biotesting: Scientific Basis and Application / E. N. Esimbekova, I. G. Torgashina, V. P. Kalyabina, V. A. Kratasyuk // Contemp. Probl. Ecol. - 2021. - Vol. 14, Is. 3. - P290-304, DOI 10.1134/S1995425521030069. - Cited By :1 . - ISSN 1995-4255
Кл.слова (ненормированные):
bioluminescence -- biotesting -- environmental monitoring -- enzymatic bioassays -- heavy metals -- pesticides
Аннотация: Abstract: The paper provides a review of the current state of research in the field of biotesting, and the problems of environmental studies and ways to solve them are discussed. The basic principles and examples of using enzymes for detecting toxicants in various environmental samples are considered. Based on an analysis of numerous published data, the advantages and limitations, as well as the prospects for using enzymes for performing biotesting tasks, are assessed. A separate section of the review is devoted to bioluminescent enzymatic bioassays developed by the authors and successfully used for environmental monitoring of water, soil, and air. The necessity of developing a battery of enzymatic bioassays is substantiated. It allows one to have the most complete and accurate information about the degree of pollution of environmental objects. © 2021, Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Esimbekova, E. N.; Torgashina, I. G.; Kalyabina, V. P.; Kratasyuk, V. A.

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18.

Herbicidal activity of slow-release herbicide formulations in wheat stands infested by weeds / N. Zhila [et al.] // J. Environ. Sci. Health Part B-Pestic. Contam. Agric. Wastes. - 2017. - Vol. 52, Is. 10. - P729-735, DOI 10.1080/03601234.2017.1356668. - Cited References:23. - The research was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences (project no. AAAA-A17-117013050028-8). . - ISSN 0360-1234. - ISSN 1532-4109

РУБ Environmental Sciences + Public, Environmental & Occupational Health
Рубрики:
POLYHYDROXYALKANOATES
POLY-3-HYDROXYBUTYRATE
FILMS
Кл.слова (ненормированные):
Metribuzin -- tribenuron-methyl -- poly-3-hydroxybutyrate -- slow-release -- formulations -- herbicidal activity -- wheat -- weeds
Аннотация: The present study reports the herbicidal activity of metribuzin and tribenuron-methyl embedded in the degradable matrix of natural poly-3-hydroxybutyrate [P(3HB)/MET and P(3HB)/TBM]. The developed formulations were constructed as films and microgranules, which were tested against the weeds such as white sweet clover Melilotus albus and lamb's quarters Chenopodium album in the presence of soft spring wheat (Triticum aestivum, cv. Altaiskaya 70) as the subject crop for investigation. The activity was measured in laboratory scale experiments by determining the density and weight of the vegetative organs of weeds. The study was also aimed at testing the effect of the experimental formulation on the growth of wheat crop as dependent on the method of herbicide delivery. The experimental MET and TBM formulations showed pronounced herbicidal activity against the weed species used in the study. The effectiveness of the experimental formulations in inhibiting weed growth was comparable to and, sometimes, higher than that of the commercial formulations (positive control). The amount of the biomass of the wheat treated with the experimental herbicide formulations was significantly greater than that of the wheat treated with commercial formulations.

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Держатели документа:
Krasnoyarsk Sci Ctr SB RAS, Inst Biophys SB RAS, Fed Res Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Zhila, Natalia; Murueva, Anastasiya; Shershneva, Anna; Shishatskaya, Ekaterina; Volova, Tatiana; Russian Academy of Sciences [AAAA-A17-117013050028-8]

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19.

Microbial polymers as a degradable carrier for pesticide delivery / O. N. Voinova [et al.] // Applied Biochemistry and Microbiology. - 2009. - Vol. 45, Is. 4. - P384-388, DOI 10.1134/S0003683809040061 . - ISSN 0003-6838
Аннотация: The possibility of use of polyhydroxyalkanoates (PHAs), biodegradable microbial polyesters, as a carrier for pesticides (?-hexachlorcyclohexane and lindane) for targeted and controlled delivery of these compounds to soil was investigated. The kinetics of polymer degradation and the dynamics of pesticide release from the extended-release formulations was studied. It is shown that pesticides embedded in a degradable polymer (PHA) carrier are released gradually and slowly, without surges, as the polymer is degraded by the soil micro-flora. The microbial soil component actively responded to the addition of the polymer as an additional nutrient substrate: the latter was degraded and then utilized. The rate of the pesticide release to the soil can be regulated by varying the polymer-pesticide ratio. В© 2009 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Forestry, Siberian Branch Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Voinova, O.N.; Kalacheva, G.S.; Grodnitskaya, I.D.; Volova, T.G.

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20.

Pesticides: formulants, distribution pathways and effects on human health – a review / V. P. Kalyabina, E. N. Esimbekova, K. V. Kopylova, V. A. Kratasyuk // Toxicol. Rep. - 2021. - Vol. 8. - P1179-1192, DOI 10.1016/j.toxrep.2021.06.004 . - ISSN 2214-7500
Кл.слова (ненормированные):
Agricultural crops -- Formulants -- Health consequences -- Pesticides -- Risk assessment
Аннотация: Pesticides are commonly used in agriculture to enhance crop production and control pests. Therefore, pesticide residues can persist in the environment and agricultural crops. Although modern formulations are relatively safe to non-target species, numerous theoretical and experimental data demonstrate that pesticide residues can produce long-term negative effects on the health of humans and animals and stability of ecosystems. Of particular interest are molecular mechanisms that mediate the start of a cascade of adverse effects. This is a review of the latest literature data on the effects and consequences of contamination of agricultural crops by pesticide residues. In addition, we address the issue of implicit risks associated with pesticide formulations. The effects of pesticides are considered in the context of the Adverse Outcome Pathway concept. © 2021 The Author(s)

Scopus
Держатели документа:
Siberian Federal University, 79 Svobodny Prospect, Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kalyabina, V. P.; Esimbekova, E. N.; Kopylova, K. V.; Kratasyuk, V. A.

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