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Constructing sustained-release herbicide formulations based on poly-3-hydroxybutyrate and natural materials as a degradable matrix / E. G. Kiselev, A. N. Boyandin, N. O. Zhila [et al.] // Pest Manag. Sci., DOI 10.1002/ps.5702. - 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'. . - ISSN 1526-498X. - ISSN 1526-4998

РУБ Agronomy + Entomology
Рубрики:
SOIL MICROBIAL COMMUNITY
   FENOXAPROP-P-ETHYL
   SLOW-RELEASE
   METRIBUZIN
Кл.слова (ненормированные):
degradation in soil -- fenoxaprop-P-ethyl -- herbicide release -- metribuzin -- physicochemical properties -- tribenuron-methyl
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

WOS
Держатели документа:
Siberian Fed Univ, Sch Fundamental Biol & Biotechnol, Krasnoyarsk, Russia.
Inst Biophys SB RAS, Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, Krasnoyarsk, Russia.
Mahatma Gandhi Univ, Int & Interuniv Ctr Nano Sci & Nano Technol, Kottayam, Kerala, India.

Доп.точки доступа:
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.; Kiselev, Evgeniy; Boyandin, Anatoly; Government of the Russian Federation [074-02-2018-328, 220]

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Production and Properties of Microbial Polyhydroxyalkanoates Synthesized from Hydrolysates of Jerusalem Artichoke Tubers and Vegetative Biomass / T. G. Volova, E. G. Kiselev, A. V. Demidenko [et al.] // Polymers. - 2022. - Vol. 14, Is. 1. - Ст. 132, DOI 10.3390/polym14010132. - Cited References:93. - This study was financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No. 075-15-2021-626) in accordance with Resolution No. 220 of the Government of the Russian Federation of 9 April 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning" (polymer synthesis, properties), and by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation No. FSRZ-2020-0006 (films production, surface properties). . - ISSN 2073-4360

РУБ Polymer Science
Рубрики:
GLUCOSE-UTILIZING STRAIN
   RALSTONIA-EUTROPHA
   ASPERGILLUS-NIGER
   ACID
Кл.слова (ненормированные):
Jerusalem artichoke hydrolysates -- PHA synthesis -- productivity -- polyhydroxyalkanoates
Аннотация: One of the major challenges in PHA biotechnology is optimization of biotechnological processes of the entire synthesis, mainly by using new inexpensive carbon substrates. A promising substrate for PHA synthesis may be the sugars extracted from the Jerusalem artichoke. In the present study, hydrolysates of Jerusalem artichoke (JA) tubers and vegetative biomass were produced and used as carbon substrate for PHA synthesis. The hydrolysis procedure (the combination of aqueous extraction and acid hydrolysis, process temperature and duration) influenced the content of reducing substances (RS), monosaccharide contents, and the fructose/glucose ratio. All types of hydrolysates tested as substrates for cultivation of three strains-C. necator B-10646 and R. eutropha B 5786 and B 8562-were suitable for PHA synthesis, producing different biomass concentrations and polymer contents. The most productive process, conducted in 12-L fermenters, was achieved on hydrolysates of JA tubers (X = 66.9 g/L, 82% PHA) and vegetative biomass (55.1 g/L and 62% PHA) produced by aqueous extraction of sugars at 80 degrees C followed by acid hydrolysis at 60 degrees C, using the most productive strain, C. necator B-10646. The effects of JA hydrolysates on physicochemical properties of PHAs were studied for the first time. P(3HB) specimens synthesized from the JA hydrolysates, regardless of the source (tubers or vegetative biomass), hydrolysis conditions, and PHA producing strain employed, exhibited the 100-120 degrees C difference between the T-melt and T-degr, prevailing of the crystalline phase over the amorphous one (C-x between 69 and 75%), and variations in weight average molecular weight (409-480) kDa. Supplementation of the culture medium of C. necator B-10646 grown on JA hydrolysates with potassium valerate and epsilon-caprolactone resulted in the synthesis of P(3HB-co-3HV) and P(3HB-co-4HB) copolymers that had decreased degrees of crystallinity and molecular weights, which influenced the porosity and surface roughness of polymer films prepared from them. The study shows that JA hydrolysates used as carbon source enabled productive synthesis of PHAs, comparable to synthesis from pure sugars. The next step is to scale up PHA synthesis from JA hydrolysates and conduct the feasibility study. The present study contributes to the solution of the critical problem of PHA biotechnology-finding widely available and inexpensive substrates.

WOS
Держатели документа:
Siberian Fed Univ, Sch Fundamental Biol & Biotechnol, Basic Dept Biotechnol, Krasnoyarsk 660041, Russia.
Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, Inst Biophys, SB RAS, Krasnoyarsk 660036, Russia.
Krasnoyarsk Sci Ctr SB RAS, LV Kirensky Phys Inst, Fed Res Ctr, SB RAS, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Fed Res Ctr, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Volova, Tatiana G.; Kiselev, Evgeniy G.; Demidenko, Alexey V.; Zhila, Natalia O.; Nemtsev, Ivan V.; Lukyanenko, Anna V.; Kiselev, Evgeniy; Project "Agropreparations of the new generation: a strategy of construction and realization" [075-15-2021-626]; State Assignment of the Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0006]

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Development of Biodegradable Delivery Systems Containing Novel 1,2,4-Trioxolane Based on Bacterial Polyhydroxyalkanoates / S. Y. Lipaikin, I. A. Yaremenko, A. O. Terent'ev [et al.] // Adv. Polym. Technol. - 2022. - Vol. 2022. - Ст. 6353909, DOI 10.1155/2022/6353909. - Cited References:70. - \his 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." . - ISSN 0730-6679. - ISSN 1098-2329

РУБ Engineering, Chemical + Polymer Science
Рубрики:
IN-VITRO
   BRIDGED 1,2,4,5-TETRAOXANES
   ANTIMALARIAL ACTIVITY
   RELEASE
Аннотация: In this work, delivery systems in the form of microparticles and films containing 1,2,4-trioxolane (ozonide, OZ) based on polyhydroxyalkanoates (PHAs) were developed. Main systems' characteristics were investigated: the particle yield, average diameter, zeta potential, surface morphology, loading capacity, and drug release profile of microparticles, as well as surface morphology and release profiles of OZ-containing films. PHA-based OZ-loaded microparticles have been found to have satisfactory size, zeta potential, and ozonide loading-release behavior. It was noted that OZ content influenced the surface morphology of obtained systems.

WOS
Держатели документа:
Siberian Fed Univ, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia.
Russian Acad Sci, ND Zelinsky Inst Organ Chem, 47 Leninsky Prosp, Moscow 119991, Russia.
Inst Biophys SB RAS, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Lipaikin, Sergei Y.; Yaremenko, Ivan A.; Terent'ev, Alexander O.; Volova, Tatiana G.; Shishatskaya, Ekaterina, I; Lipaikin, Sergei; Government of the Russian Federation [074-02-2018-328]

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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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Chemical Modification of Films from Biosynthetic Poly-3-Hydroxybutyrate Aimed to Improvement of Their Surface Properties / A. N. Boyandin, A. A. Sukhanova, E. D. Nikolaeva, I. V. Nemtsev // Macromol. Sympos. - 2021. - Vol. 395, Is. 1. - Ст. 2000281, DOI 10.1002/masy.202000281 . - ISSN 1022-1360
Кл.слова (ненормированные):
biocompatibility -- polyhydroxyalkanoates -- polyhydroxybutyrate -- polymer modification -- Ammonia -- Biocompatibility -- Biopolymers -- Bromine compounds -- Cell culture -- Chemical modification -- Contact angle -- Free energy -- Hydrophilicity -- Reducing agents -- Sodium hydroxide -- Activated surfaces -- Amino-compounds -- Chemical reagents -- Mouse-fibroblasts -- Polar components -- Poly-3-hydroxybutyrate -- Surface free energy -- Water contact angle -- Polymer films
Аннотация: Films from biodegradable poly-3-hydroxybutyrate are treated with chemical reagents to improve their hydrophilicity and biocompatibility. Two approaches are tested: a single treatment with alkali, acids, oxidizing or reducing agents, and a step-by step treatment of the alkali pre-activated surface of polymer films with bromine water and amino-compounds (ammonia or triethylamine). The maximal level of hydrophilicity (the lowest water contact angle and the highest polar component of the surface free energy) is registered after a single treatment with NaOH and after the step-by-step treatment. These samples also showed the best adhesion of mouse fibroblasts of NIH 3T3 line on the film surface. So, the proposed methods can be used to enhance hydropilicity and biocompatibility of biopolymer surface. © 2021 Wiley-VCH GmbH

Scopus
Держатели документа:
Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation
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, build. 50, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
International Scientific Centre for Studying Extreme States of an Organism, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 50, build.12/2, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center “Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences”, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Boyandin, A. N.; Sukhanova, A. A.; Nikolaeva, E. D.; Nemtsev, I. V.

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Chemical Modification of Films from Biosynthetic Poly-3-Hydroxybutyrate Aimed to Improvement of Their Surface Properties / A. N. Boyandin, A. A. Sukhanova, E. D. Nikolaeva, I. V. Nemtsev // Macromol. Symp. - 2021. - Vol. 395: 4th International Conference on Progress on Polymers and Composites (NOV 26-28, 2020, ELECTR NETWORK), Is. 1. - Ст. 2000281, DOI 10.1002/masy.202000281. - Cited References:11. - This work was carried out by the team of the scientific laboratory "Smart Materials and Structures" within the state assignment of the Ministry of Science and Higher Education of the Russian Federation for the implementation of the project "Development of multifunctional smart materials and structures based on modified polymer composite materials capable to function in extreme conditions" (No. FEFE-2020-0015). The surface of the samples was investigated using a scanning electron microscope Hitachi TM3000 in the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS". . - ISSN 1022-1360. - ISSN 1521-3900

РУБ Polymer Science

Кл.слова (ненормированные):
biocompatibility -- polyhydroxyalkanoates -- polyhydroxybutyrate -- polymer -- modification
Аннотация: Films from biodegradable poly-3-hydroxybutyrate are treated with chemical reagents to improve their hydrophilicity and biocompatibility. Two approaches are tested: a single treatment with alkali, acids, oxidizing or reducing agents, and a step-by step treatment of the alkali pre-activated surface of polymer films with bromine water and amino-compounds (ammonia or triethylamine). The maximal level of hydrophilicity (the lowest water contact angle and the highest polar component of the surface free energy) is registered after a single treatment with NaOH and after the step-by-step treatment. These samples also showed the best adhesion of mouse fibroblasts of NIH 3T3 line on the film surface. So, the proposed methods can be used to enhance hydropilicity and biocompatibility of biopolymer surface.

WOS
Держатели документа:
Reshetnev Siberian State Univ Sci & Technol, 31 Krasnoyarsky Rabochy Av, Krasnoyarsk 660037, Russia.
Russian Acad Sci, Siberian Branch, Fed Res Ctr, Inst Biophys,Krasnoyarsk Sci Ctr, 50,Build 50, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Int Sci Ctr Studying Extreme States Organism, Fed Res Ctr,Krasnoyarsk Sci Ctr, 50,Build 12-2, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr, 50 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Boyandin, Anatoly Nikolayevich; Sukhanova, Anna Alekseevna; Nikolaeva, Elena Dmitrievna; Nemtsev, Ivan Vasilievich; Ministry of Science and Higher Education of the Russian Federation [FEFE-2020-0015]

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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.

WOS
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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Polymer Films of Poly-3-hydroxybutyrate Synthesized by Cupriavidus necator from Different Carbon Sources / E. Shishatskaya, I. Nemtsev, A. Lukyanenko [et al.] // J. Polym. Environ. - 2021. - Vol. 29, Is. 3. - P837-850, DOI 10.1007/s10924-020-01924-3 . - ISSN 1566-2543
Кл.слова (ненормированные):
Degradable P(3HB) -- Films -- NIH 3T3 fibroblasts -- Properties -- Structure -- Various carbon substrates -- Carbon -- Carbon films -- Cell culture -- Chlorine containing polymers -- Crystallinity -- Glucose -- Glycerol -- Scaffolds (biology) -- Semiconducting films -- Beneficial effects -- Cell scaffold -- Degree of crystallinity -- Different carbon sources -- Low crystallinity -- Poly-3-hydroxybutyrate -- Temperature characteristic -- Weight Properties -- Polymer films -- Bacteria (microorganisms) -- bacterium B -- Cupriavidus necator
Аннотация: Films were prepared from 2% solutions of biodegradable poly-3-hydroxybutyrate [P(3HB)] and investigated. The polymer was synthesized by the Cupriavidus necator B-10646 bacterium cultivated using various carbon sources (glucose and glycerol of different degrees of purity, containing 0.3 to 17.93% impurities). Glycerol as the substrate influenced molecular-weight properties and crystallinity of the polymer without affecting its temperature characteristics. The P(3HB) specimens synthesized from glycerol had reduced Mw (300–400 kDa) and degree of crystallinity (50–55%) compared to the specimens synthesized from glucose (860 kDa and 76%, respectively). The low-crystallinity P(3HB) specimens, regardless of the degree of purity of glycerol, produced a beneficial effect on the properties of polymer films, which had a better developed folded surface and increased hydrophilicity. The values of the highest roughness (Ra) of the films synthesized from glycerol were 1.8 to 4.0 times lower and the water angles 1.4–1.6 times smaller compared to the films synthesized from glucose (71.75 nm and 87.4°, respectively). Those films performed better as cell scaffolds: the number of viable NIH fibroblasts was 1.7–1.9 times higher than on polystyrene (control) or films of P(3HB) synthesized from glucose. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Scopus
Держатели документа:
Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
L.V. Kirenskii Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Shishatskaya, E.; Nemtsev, I.; Lukyanenko, A.; Vasiliev, A.; Kiselev, E.; Sukovatyi, A.; Volova, T.

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A novel method of fabricating polymer tubes using the casting solution technique / A. N. Boyandin, A. A. Sukhanova, V. V. Orlova, A. I. Volchek // Mater. Lett. - 2021. - Vol. 282. - Ст. 128833, DOI 10.1016/j.matlet.2020.128833. - Cited References:8. - This work was carried out by the team of the scientific laboratory "Intelligent Materials and Structures"within the state assignment of the Ministry of Science and Higher Education of the Russian Federation for the implementation of the project "Development of multifunctional smart materials and structures based on modified polymer composite materials capable to function in extreme conditions" (Project No. FEFE-2020-0015). . - ISSN 0167-577X. - ISSN 1873-4979

РУБ Materials Science, Multidisciplinary + Physics, Applied

Кл.слова (ненормированные):
Polymeric tube -- Tube template -- Biopolymers -- Polyesters -- Polyhydroxyalkanoates -- Polylactide
Аннотация: A procedure has been developed to fabricate polymer tubes using solution casting inside template tubes. Polyester solution placed inside the vertically fixed template evaporated forming a hollow tube on the inner walls of the template. Silicone tubes used as the templates were permeable to solvent vapors and had relatively low adhesion to materials of the fabricated tubes, enabling their effortless removal. Parameters of the polymer tubes were determined by a type of the polymer, its concentration in the solution, and the inner diameter of the template. In the first method, a clamp was placed on the lower end of the template tube. A thickness of the new tube walls gradually increased from the open to the clamped end of the template tube. In another method viscous polymer solution without clamping was used; in this case, a polymeric bulkhead was formed in the middle of the tube. Two microbial polyesters, poly-3-hydroxybutyrate and poly-3-hydroxybutyrate-co-3-hydroxyvalerate, and also synthetic poly-L-lactide were used as model polymers. (C) 2020 Elsevier B.V. All rights reserved.

WOS
Держатели документа:
Reshetnev Siberian State Univ Sci & Technol, 31 Krasnoyarsky Rabochy Av, Krasnoyarsk 660037, Russia.
Russian Acad Sci, Inst Biophys, Siberian Branch, Fed Res Ctr,Krasnoyarsk Sci Ctr,SB RAS, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Boyandin, Anatoly Nikolayevich; Sukhanova, Anna Alekseevna; Orlova, Viktoriya Viktorovna; Volchek, Alexander Ivanovich; scientific laboratory "Intelligent Materials and Structures"within the state assignment of the Ministry of Science and Higher Education of the Russian Federation [FEFE-2020-0015]

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10.

A novel method of fabricating polymer tubes using the casting solution technique / A. N. Boyandin, A. A. Sukhanova, V. V. Orlova, A. I. Volchek // Mater Lett. - 2021. - Vol. 282. - Ст. 128833, DOI 10.1016/j.matlet.2020.128833 . - ISSN 0167-577X
Кл.слова (ненормированные):
Biopolymers -- Polyesters -- Polyhydroxyalkanoates -- Polylactide -- Polymeric tube -- Tube template -- Fabrication -- Polyesters -- Ring opening polymerization -- Silicones -- Casting solutions -- Hydroxyvalerate -- Inner diameters -- Microbial polyesters -- Poly-3-hydroxybutyrate -- Poly-L-lactide -- Solution casting -- Solvent vapors -- Tubes (components)
Аннотация: A procedure has been developed to fabricate polymer tubes using solution casting inside template tubes. Polyester solution placed inside the vertically fixed template evaporated forming a hollow tube on the inner walls of the template. Silicone tubes used as the templates were permeable to solvent vapors and had relatively low adhesion to materials of the fabricated tubes, enabling their effortless removal. Parameters of the polymer tubes were determined by a type of the polymer, its concentration in the solution, and the inner diameter of the template. In the first method, a clamp was placed on the lower end of the template tube. A thickness of the new tube walls gradually increased from the open to the clamped end of the template tube. In another method viscous polymer solution without clamping was used; in this case, a polymeric bulkhead was formed in the middle of the tube. Two microbial polyesters, poly-3-hydroxybutyrate and poly-3-hydroxybutyrate-co-3-hydroxyvalerate, and also synthetic poly-L-lactide were used as model polymers. © 2020 Elsevier B.V.

Scopus
Держатели документа:
Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation
Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Boyandin, A. N.; Sukhanova, A. A.; Orlova, V. V.; Volchek, A. I.

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11.

Metabolic activity of cryogenic soils in the subarctic zone of Siberia towards “green” bioplastics / S. V. Prudnikova, S. Y. Evgrafova, T. G. Volova // Chemosphere. - 2021. - Vol. 263. - Ст. 128180, DOI 10.1016/j.chemosphere.2020.128180 . - ISSN 0045-6535
Кл.слова (ненормированные):
metabolic activity -- P(3HB) bioplastic -- P(3HB) properties -- P(3HB)-degrading strains -- Siberian cryogenic soils -- structure of microbial community -- Aspergillus -- Bacteriology -- Biodegradable polymers -- Biodegradation -- Cryogenics -- Crystallinity -- Metabolism -- Polymer films -- Reinforced plastics -- RNA -- Soils -- Aspergillus fumigatus -- Degree of crystallinity -- Microbial communities -- Nucleotide sequences -- Poly-3-hydroxybutyrate -- Polymer biodegradation -- Soil microbial community -- Surface microstructures -- Bacteria -- bacterial RNA -- fungal RNA -- mineral -- plastic -- poly(3 hydroxybutyric acid) -- polymer -- ribosome RNA -- RNA 16S -- RNA 18S -- RNA 28S -- RNA 5.8S -- abundance -- bacterium -- biodegradation -- biomass -- community structure -- concentration (composition) -- crystallinity -- fungus -- microbial community -- microstructure -- plastic -- polymer -- soil temperature -- subarctic region -- Actinobacteria -- Agrobacterium tumefaciens -- Antarctica -- Arctic -- Article -- Aspergillus fumigatus -- Aspergillus niger -- Bacilli -- Bacillus cereus -- Bacillus pumilus -- bacterial gene -- bacterium isolate -- biodegradability -- biodegradation -- biomass -- Chryseobacterium ioostei -- colony forming unit -- community structure -- concentration (parameter) -- cryogenic soil -- crystallization -- Cupriavidus necator -- ecosystem -- Escherichia coli -- Flavobacteria -- Flavobacterium -- fungal community -- fungal gene -- Fusarium fujikuroi -- Gammaproteobacteria -- green chemistry -- Lactobacterium helveticus -- metabolism -- microbial biomass -- microbial community -- molecular weight -- Mortierella alpina -- Mycobacterium -- Mycobacterium pseudoshotsii -- Nocardioides -- nucleotide sequence -- nucleotide sequence -- Paenibacillus -- Paraburkholderia -- Penicillium -- Penicillium arenicola -- Penicillium glabrum -- Penicillium lanosum -- Penicillium restrictum -- Penicillium spinulosum -- Penicillium thomii -- phylogeny -- Pseudomonas -- Rhizopus oryzae -- Rhodococcus -- RNA sequence -- Russian Federation -- soil -- soil microflora -- soil temperature -- species composition -- Stenotrophomonas -- Streptomyces -- Streptomyces prunicolor -- surface property -- temperature dependence -- thawing -- Variovorax paradoxus -- zpseudomonas lutea -- Siberia -- Aspergillus fumigatus -- Bacillus pumilus -- Bacteria (microorganisms) -- Fungi -- Penicillium thomii -- Pseudomonas sp. -- Rhodococcus sp. -- Stenotrophomonas rhizophila -- Streptomyces prunicolor -- Variovorax paradoxus
Аннотация: The present study investigates, for the first time, the structure of the microbial community of cryogenic soils in the subarctic region of Siberia and the ability of the soil microbial community to metabolize degradable microbial bioplastic – poly-3-hydroxybutyrate [P(3HB)]. When the soil thawed, with the soil temperature between 5-7 and 9–11 °C, the total biomass of microorganisms at a 10-20-cm depth was 226–234 mg g?1 soil and CO2 production was 20–46 mg g?1 day?1. The total abundance of microscopic fungi varied between (7.4 ± 2.3) ? 103 and (18.3 ± 2.2) ? 103 CFU/g soil depending on temperature; the abundance of bacteria was several orders of magnitude greater: (1.6 ± 0.1) ? 106 CFU g?1 soil. The microbial community in the biofilm formed on the surface of P(3HB) films differed from the background soil in concentrations and composition of microorganisms. The activity of microorganisms caused changes in the surface microstructure of polymer films, a decrease in molecular weight, and an increase in the degree of crystallinity of P(3HB), indicating polymer biodegradation due to metabolic activity of microorganisms. The clear-zone technique – plating of isolates on the mineral agar with polymer as sole carbon source – was used to identify P(3HB)-degrading microorganisms inhabiting cryogenic soil in Evenkia. Analysis of nucleotide sequences of rRNA genes was performed to identify the following P(3HB)-degrading species: Bacillus pumilus, Paraburkholderia sp., Pseudomonas sp., Rhodococcus sp., Stenotrophomonas rhizophila, Streptomyces prunicolor, and Variovorax paradoxus bacteria and the Penicillium thomii, P. arenicola, P. lanosum, Aspergillus fumigatus, and A. niger fungi. © 2020 Elsevier Ltd

Scopus
Держатели документа:
Siberian Federal University, 79 Svobodny Pr, Krasnoyarsk, 660041, Russian Federation
V.N. Sukachev Institute of Forest, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/28 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Melnikov Permafrost Institute, SB RAS, 36 Merzlotnaya St., Yakutsk, 677010, Russian Federation

Доп.точки доступа:
Prudnikova, S. V.; Evgrafova, S. Y.; Volova, T. G.

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12.

Thermomechanical Analysis of Isora Nanofibril Incorporated Polyethylene Nanocomposites / C. Jose, C. H. Chan, T. Winie [et al.] // Polymers. - 2021. - Vol. 13, Is. 2. - Ст. 299, DOI 10.3390/polym13020299. - Cited References:46. - This study (polymer synthesis and investigation) was financially supported by the project "Agro preparations 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 on 9 April 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning". . - ISSN 2073-4360

РУБ Polymer Science

Кл.слова (ненормированные):
polymer-cellulose nanocomposites -- crystallization -- mechanical -- properties -- Avrami model
Аннотация: The research on cellulose fiber-reinforced nanocomposites has increased by an unprecedented magnitude over the past few years due to its wide application range and low production cost. However, the incompatibility between cellulose and most thermoplastics has raised significant challenges in composite fabrication. This paper addresses the behavior of plasma-modified polyethylene (PE) reinforced with cellulose nanofibers extracted from isora plants (i.e., isora nanofibrils (INFs)). The crystallization kinetics of PE-INF composites were explained using the Avrami model. The effect of cellulose nanofillers on tuning the physiochemical properties of the nanocomposite was also explored in this work. The increase in mechanical properties was due to the uniform dispersion of fillers in the PE. The investigation on viscoelastic properties confirmed good filler-matrix interactions, facilitating the stress transfer.

WOS
Держатели документа:
Newman Coll Educ, Thodupuzha 685585, Kerala, India.
Univ Teknol MARA, Fac Appl Sci, Shah Alam 40450, Malaysia.
Mahatma Gandhi Univ, Int & Inter Univ Ctr Nanosci & Nanotechnol, Kottayam 686560, Kerala, India.
Mahatma Gandhi Univ, Sch Energy Mat, Kottayam 686560, Kerala, India.
Mahatma Gandhi Univ, Sch Chem Sci, Kottayam 686560, Kerala, India.
Siberian Fed Univ, Russian Acad Sci, Siberian Branch, Inst Biophys, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia.
Univ Palermo, Dipartimento Ingn, Viale Sci, I-90128 Palermo, Italy.
Consorzio INSTM, I-50121 Florence, Italy.
Univ Lorraine, CNRS, Inst Jean Lamour, UMR 7198, F-54500 Vandoeuvre Les Nancy, France.
Univ Studi Enna Kore, Facolta Ingn, Cittadella Univ, I-94100 Enna, Italy.
Univ Tarapaca, Inst Alta Invest, Casilla 7D, Arica 1000000, Chile.

Доп.точки доступа:
Jose, Cintil; Chan, Chin Han; Winie, Tan; Joseph, Blessy; Tharayil, Abhimanyu; Maria, Hanna J.; Volova, Tatiana; La Mantia, Francesco Paolo; Rouxel, Didier; Morreale, Marco; Laroze, David; Mathew, Lovely; Thomas, Sabu; La, Francesco Paolo; project "Agro preparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation [220]

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13.

Thermomechanical analysis of isora nanofibril incorporated polyethylene nanocomposites / C. Jose, C. H. Chan, T. Winie [et al.] // Polym. - 2021. - Vol. 13, Is. 2. - Ст. 299. - P1-15, DOI 10.3390/polym13020299 . - ISSN 2073-4360
Кл.слова (ненормированные):
Avrami model -- Crystallization -- Mechanical properties -- Polymer-cellulose nanocomposites -- Aliphatic compounds -- Cellulose nanocrystals -- Crystallization kinetics -- Fillers -- Nanocomposites -- Nanofibers -- Polyethylenes -- Viscoelasticity -- Application range -- Cellulose nanofibers -- Composite fabrication -- Physio-chemical properties -- Polyethylene nanocomposites -- Thermo-mechanical analysis -- Uniform dispersions -- Viscoelastic properties -- Cellulose -- Aliphatic Compounds -- Cellulose -- Crystallization -- Fillers -- Plants -- Polyethylene -- Thermoplastics -- Viscoelasticity
Аннотация: The research on cellulose fiber-reinforced nanocomposites has increased by an unprecedented magnitude over the past few years due to its wide application range and low production cost. However, the incompatibility between cellulose and most thermoplastics has raised significant challenges in composite fabrication. This paper addresses the behavior of plasma-modified polyethylene (PE) reinforced with cellulose nanofibers extracted from isora plants (i.e., isora nanofibrils (INFs)). The crystallization kinetics of PE–INF composites were explained using the Avrami model. The effect of cellulose nanofillers on tuning the physiochemical properties of the nanocomposite was also explored in this work. The increase in mechanical properties was due to the uniform dispersion of fillers in the PE. The investigation on viscoelastic properties confirmed good filler–matrix interactions, facilitating the stress transfer. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Scopus
Держатели документа:
Newman College, Thodupuzha, Kerala, 685585, India
Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, 40450, Malaysia
International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala, 686560, India
School of Energy Materials, Mahatma Gandhi University, Kottayam, Kerala, 686560, India
School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, 686560, India
Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences, Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation
Dipartimento di Ingegneria, Universita di Palermo, Viale delle Scienze, Palermo, 90128, Italy
Consorzio INSTM, Firenze, 50121, Italy
Institut Jean Lamour, UMR 7198, CNRS, Universite de Lorraine, Vandoeuvre-les-Nancy, F-54500, France
Facolta di Ingegneria, Universita degli Studi di Enna “Kore”, Cittadella Universitaria, Enna, 94100, Italy
Instituto de Alta Investigacion Universidad de Tarapaca, Casilla 7D, Arica, 1000000, Chile

Доп.точки доступа:
Jose, C.; Chan, C. H.; Winie, T.; Joseph, B.; Tharayil, A.; Maria, H. J.; Volova, T.; Mantia, F. P.L.; Rouxel, D.; Morreale, M.; Laroze, D.; Mathew, L.; Thomas, S.

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14.

Metabolic activity of cryogenic soils in the subarctic zone of Siberia towards "green" bioplastics / S. V. Prudnikova, S. Y. Evgrafova, T. G. Volova // Chemosphere. - 2021. - Vol. 263. - Ст. 128180, DOI 10.1016/j.chemosphere.2020.128180. - Cited References:101. - This study (polymer synthesis and investigation) 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", and by the State assignment of the Ministry of Science and Higher Education of the Russian Federation No. FSRZ-2020-0006 (investigation of polymer degradation in soils of Evenkia). . - ISSN 0045-6535. - ISSN 1879-1298

РУБ Environmental Sciences

Кл.слова (ненормированные):
Siberian cryogenic soils -- P(3HB) bioplastic -- metabolic activity -- structure of microbial community -- P(3HB)-degrading strains -- P(3HB) -- properties
Аннотация: The present study investigates, for the first time, the structure of the microbial community of cryogenic soils in the subarctic region of Siberia and the ability of the soil microbial community to metabolize degradable microbial bioplastic - poly-3-hydroxybutyrate [P(3HB)]. When the soil thawed, with the soil temperature between 5-7 and 9-11 degrees C, the total biomass of microorganisms at a 10-20-cm depth was 226-234 mg g(-1) soil and CO2 production was 20-46 mg g(-1)W day(-1). The total abundance of microscopic fungi varied between (7.4 +/- 2.3) x 10(3) and (18.3 +/- 2.2) x 10(3) CFU/g soil depending on temperature; the abundance of bacteria was several orders of magnitude greater: (1.6 +/- 0.1) x 10(6) CFU g(-1) soil. The microbial community in the biofilm formed on the surface of P(3HB) films differed from the background soil in concentrations and composition of microorganisms. The activity of microorganisms caused changes in the surface microstructure of polymer films, a decrease in molecular weight, and an increase in the degree of crystallinity of P(3HB), indicating polymer biodegradation due to metabolic activity of microorganisms. The clear-zone technique e plating of isolates on the mineral agar with polymer as sole carbon source e was used to identify P(3HB)-degrading microorganisms inhabiting cryogenic soil in Evenkia. Analysis of nucleotide sequences of rRNA genes was performed to identify the following P(3HB)degrading species: Bacillus pumilus, Paraburkholderia sp., Pseudomonas sp., Rhodococcus sp., Stenotrophomonas rhizophila, Streptomyces prunicolor, and Variovorax paradoxus bacteria and the Penicillium thomii, P. arenicola, P. lanosum, Aspergillus fumigatus, and A. niger fungi. (C) 2020 Elsevier Ltd. All rights reserved.

WOS
Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, VN Sukachev Inst Forest, 50-28 Akademgorodok, Krasnoyarsk 660036, Russia.
Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, Inst Biophys SB RAS, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
SB RAS, Melnikov Permafrost Inst, 36 Merzlotnaya St, Yakutsk 677010, Russia.

Доп.точки доступа:
Prudnikova, Svetlana, V; Evgrafova, Svetlana Yu; 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]; Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0006]

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15.

Properties of Degradable Polyhydroxyalkanoates (PHAs) Synthesized by a New Strain, Cupriavidus necator IBP/SFU-1, from Various Carbon Sources / N. O. Zhila, K. Y. Sapozhnikova, E. G. Kiselev [et al.] // Polymers. - 2021. - Vol. 13, Is. 18. - Ст. 3142, DOI 10.3390/polym13183142. - Cited References:78. - This work was financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 075-15-2021-626) in accordance with Resolution No 220 of the Government of the Russian Federation of 9 April 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning" (strain isolation, polymer synthesis and investigation), and by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation No. FSRZ-2020-0006 (study of film properties). . - ISSN 2073-4360

РУБ Polymer Science
Рубрики:
RALSTONIA-EUTROPHA
   POLY(3-HYDROXYBUTYRATE) PRODUCTION
   PLANT OIL
   ACID
Кл.слова (ненормированные):
Cupriavidus necator IBP -- SFU-1 -- cell growth and PHA synthesis -- various -- carbon sources -- PHA composition and properties -- polymer films
Аннотация: The bacterial strain isolated from soil was identified as Cupriavidus necator IBP/SFU-1 and investigated as a PHA producer. The strain was found to be able to grow and synthesize PHAs under autotrophic conditions and showed a broad organotrophic potential towards different carbon sources: sugars, glycerol, fatty acids, and plant oils. The highest cell concentrations (7-8 g/L) and PHA contents were produced from oleic acid (78%), fructose, glucose, and palm oil (over 80%). The type of the carbon source influenced the PHA chemical composition and properties: when grown on oleic acid, the strain synthesized the P(3HB-co-3HV) copolymer; on plant oils, the P(3HB-co-3HV-co-3HHx) terpolymer, and on the other substrates, the P(3HB) homopolymer. The type of the carbon source influenced molecular-weight properties of PHAs: P(3HB) synthesized under autotrophic growth conditions, from CO2, had the highest number-average (290 +/- 15 kDa) and weight-average (850 +/- 25 kDa) molecular weights and the lowest polydispersity (2.9 +/- 0.2); polymers synthesized from organic carbon sources showed increased polydispersity and reduced molecular weight. The carbon source was not found to affect the degree of crystallinity and thermal properties of the PHAs. The type of the carbon source determined not only PHA composition and molecular weight but also surface microstructure and porosity of the polymer films. The new strain can be recommended as a promising P(3HB) producer from palm oil, oleic acid, and sugars (fructose and glucose) and as a producer of P(3HB-co-3HV) from oleic acid and P(3HB-co-3HV-co-3HHx) from palm oil.

WOS
Держатели документа:
Siberian Fed Univ, Basic Dept Biotechnol, Sch Fundamental Biol & Biotechnol, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia.
SB RAS, Inst Biophys, Fed Res Ctr, Krasnoyarsk Sci Ctr, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk Sci Ctr, Fed Res Ctr, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Fed Res Ctr, Krasnoyarsk Sci Ctr, Siberian Branch, 50 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Zhila, Natalia O.; Sapozhnikova, Kristina Yu; Kiselev, Evgeniy G.; Vasiliev, Alexander D.; Nemtsev, Ivan, V; Shishatskaya, Ekaterina, I; Volova, Tatiana G.; Russian FederationRussian Federation [075-15-2021-626, 220]; State Assignment of the Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0006]

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16.

Properties of degradable polyhydroxyalkanoates (Phas) synthesized by a new strain, cupriavidus necator ibp/sfu-1, from various carbon sources / N. O. Zhila, K. Yu. Sapozhnikova, E. G. Kiselev [et al.] // Polym. - 2021. - Vol. 13, Is. 18. - Ст. 3142, DOI 10.3390/polym13183142 . - ISSN 2073-4360
Кл.слова (ненормированные):
Cell growth and PHA synthesis -- Cupriavidus necator IBP/SFU-1 -- PHA composition and properties -- Polymer films -- Various carbon sources -- Biodegradable polymers -- Carbon -- Carbon films -- Cell proliferation -- Crystallinity -- Fructose -- Glucose -- Long Term Evolution (LTE) -- Oleic acid -- Organic carbon -- Palm oil -- Polydispersity -- Semiconducting films -- Autotrophics -- Carbon source -- Cell growth and PHA synthesis -- Cupriavidu necator IBP/SFU-1 -- PHA composition and property -- Plant oil -- Polyhydroxyalkanoates -- Property -- Synthesised -- Various carbon source -- Polymer films
Аннотация: The bacterial strain isolated from soil was identified as Cupriavidus necator IBP/SFU-1 and investigated as a PHA producer. The strain was found to be able to grow and synthesize PHAs under autotrophic conditions and showed a broad organotrophic potential towards different carbon sources: sugars, glycerol, fatty acids, and plant oils. The highest cell concentrations (7–8 g/L) and PHA contents were produced from oleic acid (78%), fructose, glucose, and palm oil (over 80%). The type of the carbon source influenced the PHA chemical composition and properties: when grown on oleic acid, the strain synthesized the P(3HB-co-3HV) copolymer; on plant oils, the P(3HB-co-3HV-co-3HHx) terpolymer, and on the other substrates, the P(3HB) homopolymer. The type of the carbon source influenced molecular-weight properties of PHAs: P(3HB) synthesized under autotrophic growth conditions, from CO2, had the highest number-average (290 ± 15 kDa) and weight-average (850 ± 25 kDa) molecular weights and the lowest polydispersity (2.9 ± 0.2); polymers synthesized from organic carbon sources showed increased polydispersity and reduced molecular weight. The carbon source was not found to affect the degree of crystallinity and thermal properties of the PHAs. The type of the carbon source determined not only PHA composition and molecular weight but also surface microstructure and porosity of the polymer films. The new strain can be recommended as a promising P(3HB) producer from palm oil, oleic acid, and sugars (fructose and glucose) and as a producer of P(3HB-co-3HV) from oleic acid and P(3HB-co-3HV-co-3HHx) from palm oil. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Scopus
Держатели документа:
Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation
Federal Research Center, “Krasnoyarsk Science Center SB RAS”, Institute of Biophysics SB RAS, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center, “Krasnoyarsk Science Center SB RAS”, L.V. Kirensky Institute of Physics SB RAS, 50/38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center, “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Zhila, N. O.; Sapozhnikova, K. Yu.; Kiselev, E. G.; Vasiliev, A. D.; Nemtsev, I. V.; Shishatskaya, E. I.; Volova, T. G.

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17.

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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18.

Assessment of the efficacy of slow-release formulations of the tribenuron-methyl herbicide in field-grown spring wheat / T. G. Volova, N. L. Kurachenko, V. L. Bopp [et al.] // Environ. Sci. Pollut. Res. - 2021, DOI 10.1007/s11356-021-17195-x. - Cited References:72. - The work on production and investigation of polymer films was carried out as part of the State Assignment of the Ministry of Education and Science of the Russian Federation [Grant No. 074-02-2018-328]. . - Article in press. - ISSN 0944-1344. - ISSN 1614-7499

РУБ Environmental Sciences
Рубрики:
BIODEGRADABLE POLY-3-HYDROXYBUTYRATE
WILD MUSTARD
Кл.слова (ненормированные):
Tribenuron-methyl -- P(3HB) -- Slow-release formulations -- Spring wheat -- Weed -- control -- Yield structure -- Grain quality
Аннотация: The efficacy of slow-release formulations of tribenuron-methyl (TBM) embedded in the matrix of degradable poly(3-hydroxybutyrate) blended with birch wood flour [polymer/wood flour/herbicide 50/30/20 wt.%] was compared with the efficacy of TBM as the active ingredient of the Mortira commercial formulation, which was applied as post-emergence spray to treat spring wheat cv. Novosibirskaya 15. The study was conducted in Central Siberia (in the environs of the city of Krasnoyarsk, Russia) from May to August 2020. The biological efficacy of the embedded TBM was 92.3%, which was considerably higher than the biological efficacy of the Mortira formulation used as the post-emergence spray (15.4%). The embedding of TBM into degradable blended matrix enabled long-duration functioning of this unstable herbicide in soil. The sensitivity of weed plants to TBM differed depending on the species. TBM was more effective against A. retroflexus and A. blitoides, which were killed at an earlier stage, than against C. album and G. aparine, whose percentage increased in the earlier stage and which were controlled by the herbicide less effectively and at later stages. On the plot treated with the embedded herbicide, the parameters of the wheat yield structure were the best, and the total yield was the highest: 3360 +/- 40 kg/ha versus 3250 +/- 50 kg/ha in the group of plants sprayed with the Mortira formulation. The grain produced in all groups was of high quality and was classified as Grade 1 food grain. The highest quality parameters (grain hectoliter mass, gluten, and protein contents) were obtained in the group of plants treated with the embedded herbicide. The study of the embedded TBM confirmed the high efficacy of the experimental formulation.

WOS
Держатели документа:
Siberian Fed Univ, 79 Svobodnyi Ave, Krasnoyarsk 660041, Russia.
RAS, SB, Fed Res Ctr Krasnoyarsk Sci Ctr, Inst Biophys, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Krasnoyarsk State Agrarian Univ, 90 Mir Ave, Krasnoyarsk 660049, Russia.
Mahatma Gandhi Univ, Int & Inter Univ Ctr Nanosci & Nanotechnol, Kottayam 686560, Kerala, India.

Доп.точки доступа:
Volova, Tatiana G.; Kurachenko, Natalya L.; Bopp, Valentina L.; Thomas, Sabu; Demidenko, Aleksey V.; Kiselev, Evgeniy G.; Baranovsky, Sergey V.; Sukovatyi, Aleksey G.; Zhila, Natalia O.; Shishatskaya, Ekaterina I.; Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [074-02-2018-328]

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19.

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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20.

Properties of degradable polyhydroxyalkanoates with different monomer compositions / T. Volova, E. Kiselev, I. Nemtsev [et al.] // Int. J. Biol. Macromol. - 2021. - Vol. 182. - P98-114, DOI 10.1016/j.ijbiomac.2021.04.008. - Cited References:106. - The part of the reported study on polymer synthesis and examinationwas funded by RFBR and KKRF [Grant No. 19-43-240012 "Biological and physical principles of production of new generation biomaterials"]. The work on production and investigation of polymer films was carried out as part of the State Assignment of the Ministry of Education and Science of the Russian Federation [Grant No. FSRZ-2020-0006]. . - ISSN 0141-8130. - ISSN 1879-0003

РУБ Biochemistry & Molecular Biology + Chemistry, Applied + Polymer Science
Рубрики:
PALM KERNEL OIL
RALSTONIA-EUTROPHA
BIODEGRADABLE POLYMERS
Кл.слова (ненормированные):
Polyhydroxyalkanoates -- Chemical composition -- Physicochemical properties -- Films -- Microstructure -- Surface properties
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 degrees 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 3hydroxybutyrate 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. (C) 2021 Elsevier B.V. All rights reserved.

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Держатели документа:
Siberian Fed Univ, 79 Svohodnyi Av, Krasnoyarsk 660041, Russia.
SB RAS, Krasnoyarsk Sci Ctr, Fed Res Ctr, Inst Biophys, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
SB RAS, Krasnoyarsk Sci Ctr, Fed Res Ctr, 50 Akademgorodok, Krasnoyarsk 660036, Russia.
SB RAS, Krasnoyarsk Sci Ctr, Fed Res Ctr, LV Kirensky Inst Phys, 50-12 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Volova, T.; Kiselev, E.; Nemtsev, I.; Lukyanenko, A.; Sukovatyi, A.; Kuzmin, A.; Ryltseva, G.; Shishatskaya, E.; Petrovich, Kuzmin Andrey; RFBRRussian Foundation for Basic Research (RFBR) [19-43-240012]; Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [FSRZ-2020-0006]

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