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A hybrid PHB-hydroxyapatite composite for biomedical application: Production, in vitro and in vivo investigation / E. I. Shishatskaya, I. A. Khlusov, T. G. Volova // Journal of Biomaterials Science, Polymer Edition. - 2006. - Vol. 17, Is. 5. - P481-498, DOI 10.1163/156856206776986242 . - ISSN 0920-5063
Кл.слова (ненормированные):
Biocompatibility -- Hydroxyapatite (HA) -- PHB-hydroxyapatite composite -- Polyhydroxyalkanoate (PHA) -- Polyhydroxybutyrate (P(3HB)) -- Properties -- Biocompatibility -- Differential thermal analysis -- Electron microscopy -- Free energy -- Interfacial energy -- Physical properties -- Surface properties -- X ray analysis -- Biomedical application -- Physicochemical properties -- Polyhydroxyalkanoate (PHA) -- Polyhydroxybutyrate (PHB) -- Hydroxyapatite -- hydroxyapatite -- poly(3 hydroxybutyric acid) -- polymer -- biomaterial -- hydroxybutyric acid -- adhesion -- animal cell -- animal tissue -- article -- biomedicine -- bone marrow cell -- cell differentiation -- cell growth -- chemical structure -- composite material -- controlled study -- crystallization -- decomposition -- electron microscopy -- in vitro study -- in vivo study -- melting point -- mouse -- nonhuman -- ossification -- osteoblast -- physical chemistry -- priority journal -- rat -- strength -- structure analysis -- surface property -- synthesis -- temperature measurement -- thermal analysis -- tissue engineering -- wettability -- animal -- biomechanics -- bioremediation -- bone prosthesis -- cattle -- cell culture -- chemistry -- cytology -- differential scanning calorimetry -- drug effect -- human -- materials testing -- prostheses and orthoses -- scanning electron microscopy -- standard -- Wistar rat -- Murinae -- Animals -- Biocompatible Materials -- Biodegradation, Environmental -- Biomechanics -- Bone Substitutes -- Cattle -- Cells, Cultured -- Differential Thermal Analysis -- Durapatite -- Humans -- Hydroxybutyrates -- Materials Testing -- Microscopy, Electron, Scanning -- Osteoblasts -- Prostheses and Implants -- Rats -- Rats, Wistar -- Surface Properties
Аннотация: Samples of a hybrid composite of polyhydroxybutyrate (PHB), a biodegradable polyester, and hydroxyapatite (HA), with different PHB/HA ratios, have been prepared using mechanical-physical method. Electron microscopy, X-ray structure analysis and differential thermal analysis have been used to investigate the structure and physicochemical properties of the composite, depending on the PHB/HA ratio. The properties of the surface of the HA-loaded composite are significantly different from those of the pure polymer. As the HA percentage in the composite increases, free interface energy, the cohesive force, i.e., the strength of the adhesive bond between the composite surface and the water phase, and surface wettability increase. The HA percentage of the composite does not influence its melting temperature, but affects the temperature for the onset of decomposition: as the HA content increases from 0 to 10% (w/w), Td decreases from 260В°C to 225В°C. The degree of crystallinity of PHB/HA increases from 77% to 89% with an increase in the HA fraction from 10% to 50%. Functional properties of the composites have been investigated in vitro and in vivo. The best parameters of growth and differentiation of murine marrow osteoblasts are registered on PHB/HA samples containing 10% and 20% HA. In ectopic bone formation assay it has been proven that the hybrid PHB/HA composites can function as scaffolds and that bone tissue develops on their surface and in pores. В© VSP 2006.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 60036, Russian Federation
Tomsk State University, Tomsk 634021, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Khlusov, I.A.; Volova, T.G.

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Low-field electron emission of diamond/pyrocarbon composites / A. V. Karabutov [et al.] // Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures. - 2001. - Vol. 19: 13th International Vaccum Microelectronics Conference (14 August 2000 through 17 August 2000, Guangzhou, Is. 3. - P965-970, DOI 10.1116/1.1368669 . - ISSN 1071-1023
Кл.слова (ненормированные):
Carbon nanotubes -- Chemical bonds -- Chemical vapor deposition -- Composite materials -- Diamond films -- Electric conductivity -- Electron emission -- Electron energy levels -- Hysteresis -- Interfaces (materials) -- Raman scattering -- Semiconducting diamonds -- Semiconductor quantum wells -- Transmission electron microscopy -- X ray diffraction analysis -- X ray photoelectron spectroscopy -- Pyrocarbon composites -- Nanostructured materials
Аннотация: The properties of field electron emission for diamond/pyrocarbon nanocomposites produced from diamond particles surrounded by a pyrocarbon matrix were studied. Low-threshold emissions at fields of ?1 V/?m with no activation or hysterisis in the current versus voltage (I/V) behaviour were observed for the materials. Scanning tunneling-field emission microscopy was used to study the mechanisms of low-field electron emission from the composites, and a model based on quantum well effect at the diamond/graphite interface was proposed and discussed.

Scopus
Держатели документа:
General Physics Institute, Vavilova str. 38, Moscow 117942, Russian Federation
Central Research Institute of Materials, Paradnaya str. 8, St. Petersburg 191014, Russian Federation
Institute of Biophysics, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Karabutov, A.V.; Frolov, V.D.; Konov, V.I.; Ralchenko, V.G.; Gordeev, S.K.; Belobrov, P.I.

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Thermal properties of diamond/carbon composites / A. Vlasov [et al.] // Diamond and Related Materials. - 2000. - Vol. 9: 10th European Conference on Diamond, Diamond-like Materials, Carbon Nanotubes, Nitrides and Silicon Carbide (12 September 1999 through 17 September 1999, Prague, Czech Republic, Is. 3-6. - P1104-1109, DOI 10.1016/S0925-9635(99)00256-3 . - ISSN 0925-9635
Кл.слова (ненормированные):
Diamond composites -- Laser flash technique -- TEM -- Thermal conductivity -- Grain size and shape -- Laser applications -- Nanostructured materials -- Phonons -- Thermal conductivity of solids -- Transmission electron microscopy -- Diamond composites -- Laser flash technique -- Industrial diamonds -- carbon -- composite -- diamond -- thermal conductivity
Аннотация: The thermal conductivity, k, of diamond/carbon composites with different ratios of sp 2/sp 3-bonded carbon is measured by the laser flash technique. The thermal conductivity of nanocomposites containing 6 nm diamond particles falls within the range of k=0.003-0.017 W/cmK at room temperature. The thermal conductivity increases while nanopores are gradually filled with pyrolytic carbon (pyrocarbon/diamond mass ratio variation of 0.0-0.5). Transmission electron microscopy data reveal a fairly uniform mixture of two carbon phases, the diamond and matrix having similar grain sizes. Estimates show that the phonon free path is limited by dimensions of carbon matrix layer. Thermal data for coarse-grain (1-2 ?m) composites are also given for comparison. (C) 2000 Elsevier Science S.A. All rights reserved.

Scopus
Держатели документа:
General Physics Institute, 38 Vavilov Str., Moscow 117942, Russian Federation
Ctrl. Res. Institute of Materials, 8 Paradnaya Str., St. Petersburg, Russian Federation
Institute of Crystallography, Leninsky prosp. 59, Moscow, Russian Federation
Institute of Biophysics, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Vlasov, A.; Ralchenko, V.; Gordeev, S.; Zakharov, D.; Vlasov, I.; Karabutov, A.; Belobrov, P.

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Thermal properties of diamond/carbon composites [Text] / A. . Vlasov [et al.] // Diam. Relat. Mat. - 2000. - Vol. 9: 10th European Conference on Diamond, Diamond-Like Materials, Nitrides and Silicon Carbide (Diamond 1999) (SEP 12-17, 1999, PRAGUE, CZECH REPUBLIC), Is. 03.06.2013. - P. 1104-1109, DOI 10.1016/S0925-9635(99)00256-3. - Cited References: 9 . - ISSN 0925-9635

РУБ Materials Science, Multidisciplinary
Рубрики:
CVD DIAMOND
   CONDUCTIVITY
   FILMS
   RAMAN
Кл.слова (ненормированные):
diamond composites -- laser flash technique -- TEM -- thermal conductivity
Аннотация: The thermal conductivity, k, of diamond/carbon composites with different ratios of sp(2)/sp(3)-bonded carbon is measured by the laser flash technique. The thermal conductivity of nanocomposites containing 6 nm diamond particles falls within the range of k = 0.003-0.017 W/cmK; at room temperature. The thermal conductivity increases while nanopores are gradually filled with pyrolytic carbon (pyrocarbon/diamond mass ratio variation of 0.0-0.5). Transmission electron microscopy data reveal a fairly uniform mixture of two carbon phases, the diamond and matrix having similar grain sizes. Estimates show that the phonon free path is limited by dimensions of carbon matrix layer. Thermal data for coarse-grain (1-2 mu m) composites are also given for comparison. (C) 2000 Elsevier Science S.A. All rights reserved.

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Держатели документа:
Inst Gen Phys, Moscow 117942, Russia
CRIM, St Petersburg, Russia
Inst Crystallog, Moscow, Russia
Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Vlasov, A...; Ralchenko, V...; Gordeev, S...; Zakharov, D...; Vlasov, I...; Karabutov, A...; Belobrov, P...

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Low-field electron emission of diamond/pyrocarbon composites [Text] / A. V. Karabutov [et al.] // J. Vac. Sci. Technol. B. - 2001. - Vol. 19: 13th International Vacuum Microlectronics Conference (AUG 13-17, 2000, GUANGZHOU, PEOPLES R CHINA), Is. 3. - P. 965-970, DOI 10.1116/1.1368669. - Cited References: 31 . - ISSN 1071-1023

РУБ Engineering, Electrical & Electronic + Nanoscience & Nanotechnology + Physics, Applied
Рубрики:
CVD DIAMOND FILMS
   SCANNING-TUNNELING-MICROSCOPY
   AMORPHOUS-CARBON
   COLD-CATHODE
Аннотация: Properties of the field electron emission for diamond/pyrocarbon nanocomposites produced from diamond particles surrounded by an sp(2)-bonded pyrocarbon matrix are considered as functions of a size of diamond particles selected in the range of 5 nm - 5 mum, and of an average thickness of the pyrocarbon shell controlled by the pyrocarbon/diamond mass ratio varied from 0 to 0.5. The low-threshold emission at fields of greater than or equal to1 V/mum with ''no activation/no hysteresis'' I-V behavior was observed for these materials using tungsten tip microprobes as well as a fluorescent screen. A specially designed scanning tunneling-field emission microscope was used for simultaneous mapping of field emission intensity, topography, work function, and electrical resistivity to study the mechanisms of the emission from the composites and well-emitting chemical vapor deposition diamond films. It was found that for both of the materials emission centers are associated with interfaces between diamond and sp2-bonded carbon phases. Possible mechanisms of the low-field electron emission for the diamond/graphite composites including local field enhancement are analyzed. A model of the low-field emission based on quantum well effect at the diamond/graphite interface is proposed and discussed. (C) 2001 American Vacuum Society.

WOS
Держатели документа:
Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia
Cent Res Inst Mat, St Petersburg, Russia
Russian Acad Sci, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Karabutov, A.V.; Frolov, V.D.; Konov, V.I.; Ralchenko, V.G.; Gordeev, S.K.; Belobrov, P.I.

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The influence of altitudinal zonality on spectral characteristics (MODIS/Terra) mountain forests of Western Sayan / N. Kukoba, Y. Ivanova, I. Botvich // Climate Change Impacts on High-Altitude Ecosystems . - 2015. - P637-643, DOI 10.1007/978-3-319-12859-7_26 . - ISBN 9783319128597 (ISBN); 9783319128580 (ISBN)
Кл.слова (ненормированные):
Mountain forests of Siberia -- Net primary production (NPP) -- Vegetation indices
Аннотация: The purpose of this study is to find a relationship between changes in spectral characteristics (MODIS/Terra) of mountain forests and the altitude at which they grow. In the study area, which is located in the West Sayan Mountains (in South Siberia), the types of forest ecosystems change markedly with altitude. The study uses the data of the MODIS-NPP model intended for the evaluation of global net production. Results of the study show that the best approach to dividing mountain forests into different types is to use 8-day composites of satellite data collected at the beginning of the growing season (April-May). This is the time when the most significant differences are recorded between vegetation indices, including Normalized Difference Vegetation Index (NDVI), LAI, and EVI of the mountain forests growing in different altitudinal zones. © Springer International Publishing Switzerland 2015.

Scopus
Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kukoba, N.; Ivanova, Y.; Botvich, I.

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Constructing Slow-Release Formulations of Metribuzin Based on Degradable Poly(3-hydroxybutyrate) / A. N. Boyandin [et al.] // J. Agric. Food Chem. - 2016. - Vol. 64, Is. 28. - P5625-5632, DOI 10.1021/acs.jafc.5b05896 . - ISSN 0021-8561
Кл.слова (ненормированные):
controlled release -- degradable poly(3-hydroxybutyrate) -- herbicide -- metribuzin -- release kinetics -- Polyethylene glycols -- Weed control -- Controlled release -- Environmental release -- Herbicide release -- Laboratory system -- Matrix formulation -- Metribuzin -- Poly-3-hydroxybutyrate -- Release kinetics -- Herbicides
Аннотация: Experimental formulations of herbicide metribuzin embedded in matrices of degradable natural polymer poly(3-hydroxybutyrate) (P3HB) and its composites with poly(ethylene glycol) (PEG), poly-?-caprolactone (PCL), and wood powder have been prepared in the form of pressed pellets containing 75% polymeric basis (pure P3HB or its composite with a second component at a ratio of 7:3) and 25% metribuzin. Incubation of formulations in soil laboratory systems led to the degradation of the matrix and herbicide release. The most active release of metribuzin (about 60% of the embedded herbicide over 35 days) was detected for the P3HB/PEG carrier compared to the P3HB, P3HB/wood, and P3HB/PCL forms (30-40%). Thus, the study shows that herbicide release can be controlled by the matrix formulation. Metribuzin formulations exerted a significant herbicidal effect on the plant Agrostis stolonifera, used as a weed plant model. Application of these long-term formulations will make it possible to reduce environmental release of chemicals, which will restrict the rate of their accumulation in trophic chains of ecosystems and abate their adverse effects on the biosphere. © 2016 American Chemical Society.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation

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

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Antibacterial properties of films of cellulose composites with silver nanoparticles and antibiotics / T. G. Volova [et al.] // Polym Test. - 2018. - Vol. 65. - P54-68, DOI 10.1016/j.polymertesting.2017.10.023 . - ISSN 0142-9418
Кл.слова (ненормированные):
Antibacterial activity -- Antibiotics -- Bacterial cellulose -- Composites -- Properties -- Silver nanoparticles -- Antibiotics -- Atoms -- Boron carbide -- Cell culture -- Cellulose -- Cellulose films -- Composite materials -- Escherichia coli -- Materials testing apparatus -- Metal nanoparticles -- Nanocomposite films -- Nanoparticles -- Scanning electron microscopy -- Silver compounds -- Spectrum analysis -- Synthesis (chemical) -- Tensile testing -- Water pollution -- X ray analysis -- Anti-bacterial activity -- Antibacterial properties -- Bacterial cellulose -- Mechanical characteristics -- Properties -- Silver nanoparticles -- Structure and properties -- Tensile testing machines -- Silver -- Antibiotics -- Cellulose -- Composites -- Properties -- Silver
Аннотация: The present study describes production of bacterial cellulose composites with silver nanoparticles and antibiotics and compares their properties. Bacterial cellulose (BC) composites synthesized in the culture of the strain of acetic acid bacterium Komagataeibacter xylinus VKPM B-12068 with silver nanoparticles, BC/AgNps, were produced hydrothermally, under different AgNO3 concentrations (0.0001, 0.001, and 0.01 M) in the reaction medium. The presence of silver in the BC/AgNp composites was confirmed by elemental analysis conducted using scanning electron microscopy with a system of X-ray spectral analysis. Analysis showed that the average atomic number of silver particles in composite samples depended on the concentration of AgNO3: as AgNO3 concentration in the reaction solution was increased, silver content in the composites increased from 0.044 to 0.37 mg/cm2. BC composites with amikacin and ceftriaxone were prepared by immersing dry BC films in solutions containing different concentrations of the antibiotics. The surface structure and properties and physicochemical and mechanical characteristics of composites were investigated using SEM, DSC, X-ray analysis, the system for measuring water contact angles, and electromechanical tensile testing machine. The disk-diffusion method and the shake-flask culture method used in this study showed that all experimental composites had pronounced antibacterial activity against E. coli, Ps. eruginosa, K. pneumoniae, and St. aureus, and the BC/antibiotic composites were more active than BC/AgNp ones; S. aureus was the most susceptible to the effect of BC composites. No potential cytotoxicity was detected in any of the BC/AgNp composites in the NIH 3T3 mouse fibroblast cell culture, in contrast to the BC/antibiotic composites. These results suggest that BC composites constructed in the present study hold promise as dressings for managing wounds, including contaminated ones. © 2017 Elsevier Ltd

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Держатели документа:
Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 43/50 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Volova, T. G.; Shumilova, A. A.; Shidlovskiy, I. P.; Nikolaeva, E. D.; Sukovatiy, A. G.; Vasiliev, A. D.; Shishatskaya, E. I.

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Properties of Bacterial Cellulose Composites with Silver Nanoparticles / I. P. Shidlovskiy [et al.] // Biophysics. - 2018. - Vol. 63, Is. 4. - P519-525, DOI 10.1134/S0006350918040188 . - ISSN 0006-3509
Кл.слова (ненормированные):
:bacterial cellulose -- antibacterial activity -- composites -- hydrothermal synthesis -- silver nanoparticles
Аннотация: Abstract: Composites of bacterial cellulose, which were synthesized in a culture of the strain of acetic acid bacteria Komagataeibacter xylinus VKPM B-12068, with silver nanoparticles were produced hydrothermally by varying the concentrations of AgNO3 in the medium. The presence of silver in the composites was confirmed by elemental analysis. An increase in the number of silver nanoparticles in the composite from 1.08 to 9.1 wt % (from 0.044 to 0.370 mg/cm2) was shown under increasing AgNO3 concentration in the medium from 0.0001 to 0.01 M. The structure, properties of the surface, and the physicochemical properties of the composites depending on the silver content were investigated using scanning electron microscopy, differential scanning calorimetry, X-ray diffraction, and a water contact-angle measurement system. Using the disk-diffusion method, it was shown that the resulting composites have a pronounced antibacterial activity against pathogenic microflora E. coli, Ps. eruginosa, and St. aureus. © 2018, Pleiades Publishing, Inc.

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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:
Shidlovskiy, I. P.; Shumilova, A. A.; Shishatskaya, E. I.; Volova, T. G.

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10.

Biotechnological wound dressings based on bacterial cellulose and degradable copolymer P(3HB/4HB) / T. G. Volova [et al.] // Int. J. Biol. Macromol. - 2019. - Vol. 131. - P230-240, DOI 10.1016/j.ijbiomac.2019.03.068. - Cited By :1 . - ISSN 0141-8130
Кл.слова (ненормированные):
Bacterial cellulose -- Composites -- Polyhydroxyalkanoates -- 3 hydroxybutyric acid 4 hydroxybutyric acid copolymer -- actovegin -- bacterial cellulose -- cellulose -- collagen type 1 -- copolymer -- cytokeratin 10 -- cytokeratin 14 -- solcoseryl -- unclassified drug -- angiogenesis -- animal cell -- animal experiment -- animal model -- animal tissue -- biochemical analysis -- biocompatibility -- burn -- cell growth -- controlled study -- cutaneous parameters -- differential scanning calorimetry -- drug release -- elemental analysis -- female -- fibroblast -- histopathology -- in vitro study -- in vivo study -- inflammation -- mechanics -- nonhuman -- rat -- Review -- wound healing -- wound planimetry -- X ray analysis
Аннотация: Hybrid wound dressings have been constructed using two biomaterials: bacterial cellulose (BC) and copolymer of 3-hydroxybutyric and 4-hydroxybutyric acids [P(3HB/4HB)] – a biodegradable polymer of microbial origin. Some of the experimental membranes were loaded with drugs promoting wound healing and epidermal cells differentiated from multipotent adipose-derived mesenchymal stem cells. A study has been carried out to investigate the structure and physical/mechanical properties of the membranes. The in vitro study showed that the most effective scaffolds for growing fibroblasts were composite BC/P(3HB/4HB) films loaded with actovegin. Two types of the experimental biotechnological wound dressings – BC/P(3HB/4HB)/actovegin and BC/P(3HB/4HB)/fibroblasts – were tested in vivo, on laboratory animals with model third-degree skin burns. Wound planimetry, histological examination, and biochemical and molecular methods of detecting factors of angiogenesis, inflammation, type I collagen, and keratin 10 and 14 were used to monitor wound healing. Experimental wound dressings promoted healing more effectively than VoskoPran – a commercial wound dressing. © 2019

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Держатели документа:
Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
V.F. Voino-Yasenetsky Krasnoyarsk State Medical University, 1 Partizan Zheleznyak Street, Krasnoyarsk, 660022, Russian Federation

Доп.точки доступа:
Volova, T. G.; Shumilova, A. A.; Nikolaeva, E. D.; Kirichenko, A. K.; Shishatskaya, E. I.

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11.

Thermal, mechanical and biodegradation studies of biofiller based poly-3-hydroxybutyrate biocomposites / S. Thomas [et al.] // Int. J. Biol. Macromol. - 2019, DOI 10.1016/j.ijbiomac.2019.11.112 . - Article in press. - ISSN 0141-8130
Кл.слова (ненормированные):
Biocomposite -- Environmental degradation -- Physical properties -- Poly-3-hydroxybutyrate
Аннотация: Biodegradable poly-3-hydroxybutyrate [P(3HB)] and natural fillers - clay, peat, and birch wood flour – were used to prepare powdered composites to form pellets and granules. Pellets were produced by cold pressing of polymer and filler powder whereas granules were produced from the powders wetted with ethanol. Characterization techniques like IR spectroscopy, differential scanning calorimetry, X-ray analysis, mechanical analysis and electron microscopy were employed to study the properties of the initial P(3HB) and fillers and the composites. Analysis of the IR spectra of the composites showed the absence of chemical bonds between the components, i.e. the composites were physical mixtures. Young's moduli of the pellets prepared from initial materials varied considerably, and the highest value was obtained for P(3HB) pellets (350 MPa). Studies of biodegradation of composite pellets and granules in the soil for 35 days showed that the residual mass of the pellets had decreased to 68% for P(3HB); 56.4% for P(3HB)/peat; 67% for P(3HB)/wood flour, and 64% for P(3HB)/clay; granules exhibited a similar mass loss, residual mass of the granules of P(3HB) was 68.4%, P(3HB)/peat 46.4%; P(3HB)/wood flour 77%, and P(3HB)/clay 74%. This shows the significance of the material as an eco-friendly composite without sacrificing its mechanical properties. © 2018

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Держатели документа:
Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation
International and Interuniversity Centre for Nano Science and Nano technology, Kottayam, Kerala, India
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
L.V. Kirensky Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 43/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center Krasnoyarsk Scientific Center of the Siberian Branch of Russian, Academy of Sciences, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Thomas, S.; Shumilova, A. A.; Kiselev, E. G.; Baranovsky, S. V.; Vasiliev, A. D.; Nemtsev, I. V.; Kuzmin, A. P.; Sukovatyi, A. G.; Avinash, R. P.; Volova, T. G.

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12.

Effect of nanoparticles in growth of test - Bacteria / S. V. Stolyar, L. A. Chekanova, R. N. Yaroslavtsev [et al.] // Journal of Physics: Conference Series : Institute of Physics Publishing, 2019. - Vol. 1399: International Scientific Conference on Applied Physics, Information Technologies and Engineering 2019, APITECH 2019 (25 September 2019 through 27 September 2019, ) Conference code: 156053, Is. 2. - Ст. 022029, DOI 10.1088/1742-6596/1399/2/022029
Кл.слова (ненормированные):
Coefficient of performance -- Hematite -- Industrial water treatment -- Nanomagnetics -- Nanoparticles -- Nickel compounds -- Nickel-Phosphorus -- Silver compounds -- Testing -- Water conservation -- Anti-microbial properties -- Klebsiella pneumoniae -- Magnetic composites -- Magnetic nano-particles -- Magnetic particle -- Pseudomonas aeruginosa -- Staphylococcus aureus -- Water treatment facilities -- Bacteria
Аннотация: Confident effect of five magnetic composite nanoparticles (FeP@Ag, FeP@Pd, CoP, NiP, Fe2O3@A) on growth of test bacteria colonies (Acinetobacter baumannii, scherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus) in five replicates each is considered. Reliable inhibitors of colonies of all five test bacteria were nanoparticles FeP@Ag. CoP nanoparticles are reliable inhibitors of growth of 4 test bacteria (except for test bacteria Escherichia oli). NiP nanoparticles are reliable inhibitors of growth of 2 test bacteria: Escherichia oli and Klebsiella pneumoniae. Bacteria Escherichia oli were most sensitive to the effect of magnetic nanoparticles; and bacteria Pseudomonas aeruginosa and Staphylococcus aureus were most resistant to the effect of magnetic nanoparticles. The prospects of the method are in the possibility of multiple reuse of the magnetic particles with antimicrobial properties for bacterial decontamination of the studied sources of water and removal of magnetic nanoparticles from the treated liquids by electromagnet. The method can find use in water treatment facilities for household, Industrial and medical wastes. © Published under licence by IOP Publishing Ltd.

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Держатели документа:
Federal Research Center, Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, 50/38 Akademgorodok, Krasnoyarsk, Russian Federation
Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences, 50/12 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Stolyar, S. V.; Chekanova, L. A.; Yaroslavtsev, R. N.; Ladygina, V. P.; Tirranen, L. S.

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13.

Thermal, mechanical and biodegradation studies of biofiller based poly-3-hydroxybutyrate biocomposites / S. Thomas, A. A. Shumilova, E. G. Kiselev [et al.] // Int. J. Biol. Macromol. - 2020. - Vol. 155. - P1373-1384, DOI 10.1016/j.ijbiomac.2019.11.112. - Cited References:38. - This studywas financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning".; The surface of the samples was investigated using a scanning electron microscope Hitachi TM-3000 in the Joint Instrument Use Center at the Krasnoyarsk Scientific Center of Siberian Branch of Russian Academy of Sciences. . - ISSN 0141-8130. - ISSN 1879-0003

РУБ Biochemistry & Molecular Biology + Chemistry, Applied + Polymer Science
Рубрики:
FORMULATIONS
   POLYHYDROXYALKANOATES
   POLYHYDROXYBUTYRATE
   SOIL
Кл.слова (ненормированные):
Poly-3-hydroxybutyrate -- Biocomposite -- Physical properties -- Environmental -- degradation
Аннотация: Biodegradable poly-3-hydroxybutyrate [P(3HB)] and natural fillers - clay, peat, and birch wood flour - were used to prepare powdered composites to form pellets and granules. Pellets were produced by cold pressing of polymer and filler powder whereas granules were produced from the powders wetted with ethanol. Characterization techniques like IR spectroscopy, differential scanning calorimetry, X-ray analysis, mechanical analysis and electron microscopy were employed to study the properties of the initial P(3HB) and fillers and the composites. Analysis of the IR spectra of the composites showed the absence of chemical bonds between the components, i.e. the composites were physical mixtures. Young's moduli of the pellets prepared from initial materials varied considerably, and the highest value was obtained for P(3HB) pellets (350 MPa). Studies of biodegradation of composite pellets and granules in the soil for 35 days showed that the residual mass of the pellets had decreased to 68% for P (3HB); 56.4% for P(3HB)/peat; 67% for P(3HB)/wood flour, and 64% for P(3HB)/clay; granules exhibited a similar mass loss, residual mass of the granules of P(3HB) was 68.4%, P(3HB)/peat 46.4%; P(3HB)/wood flour 77%, and P (3HB)/clay 74%. This shows the significance of the material as an eco-friendly composite without sacrificing its mechanical properties. (C) 2019 Published by Elsevier B.V.

WOS
Держатели документа:
Siberian Fed Univ, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia.
Int & Interuniv Ctr Nano Sci & Nano Technol, Kottayam, Kerala, India.
Krasnoyarsk Sci Ctr SB RAS, Inst Biophys SB RAS, Fed Res Ctr, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Krasnoyarsk Sci Ctr SB RAS, LV Kirensky Inst Phys SB RAS, Fed Res Ctr, 43-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr, 50 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Thomas, Sabu; Shumilova, A. A.; Kiselev, E. G.; Baranovsky, S., V; Vasiliev, A. D.; Nemtsev, I., V; Kuzmin, Andrei Petrovich; Sukovatyi, A. G.; Avinash, R. Pai; Volova, T. G.; Nemtsev, Ivan; Government of the Russian Federation [220]; Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]

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14.

Poly-3-hydroxybutyrate/chitosan composite films and nonwoven mats / A. A. Sukhanova, A. E. Murzova, A. N. Boyandin [et al.] // Int. J. Biol. Macromol. - 2020. - Vol. 165. - P2947-2956, DOI 10.1016/j.ijbiomac.2020.10.177 . - ISSN 0141-8130
Кл.слова (ненормированные):
Chitosan -- Composites -- Films -- Nonwoven mats -- Physicochemical properties -- Poly-3-hydroxybutyrate -- Tissue engineering
Аннотация: Composite films and nonwoven mats of the poly-3-hydroxybutyrate and chitosan natural polymers were prepared and investigated. DSC and FTIR techniques were used to confirm that P(3HB) blending with chitosan resulted in a decrease in P(3HB) crystallinity to 47% and 62% in the films and nonwoven mats, respectively. Scanning electron microscopy showed that addition of chitosan induced changes in the surface morphology of the composite films and a reduction in the diameter of ultrafine fibers in the nonwoven mats from 800 nm to 460 nm. The values of water contact angle for films (53°) and nonwoven mats (50.6°) suggested that chitosan enhanced hydrophilic properties and moisture absorption capacity of the composite materials. On the other hand, P(3HB) showed its reinforcing ability and improved the physical/mechanical properties of chitosan. The work included studies of in vitro biodegradation of the composite specimens and their ability to maintain cell growth and attachment in NIH 3T3 fibroblast culture. © 2020

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

Доп.точки доступа:
Sukhanova, A. A.; Murzova, A. E.; Boyandin, A. N.; Kiselev, E. G.; Sukovatyi, A. G.; Kuzmin, A. P.; Shabanov, A. V.

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15.

Polysaccharide-coated iron oxide nanoparticles: Synthesis, properties, surface modification / S. V. Stolyar, V. V. Krasitskaya, L. A. Frank [et al.] // Mater Lett. - 2021. - Vol. 284. - Ст. 128920, DOI 10.1016/j.matlet.2020.128920 . - ISSN 0167-577X
Кл.слова (ненормированные):
Biomaterials -- Magnetic materials -- Nanoparticles -- Polysaccharide -- Iron oxides -- Magnetite -- Magnetite nanoparticles -- Molecules -- Polysaccharides -- Synthesis (chemical) -- Arabinogalactan -- Bioanalytical systems -- Covalent immobilization -- Iron oxide nanoparticle -- Magnetic nanoparticles
Аннотация: In this work, magnetite nanoparticles coated with polysaccharides were synthesized. Arabinogalactan and chitosan were used as polysaccharides. The possibilities of immobilization of biospecific molecules on the surface of the obtained composites were studied. Experiments on covalent immobilization of biospecific molecules on magnetic nanoparticles coated with a polysaccharide showed a high density of immobilized molecules. This suggests the use of such materials in bioanalytical systems or as affinity sorbents. © 2020 Elsevier B.V.

Scopus
Держатели документа:
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Biophysics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Astrakhan State University, Astrakhan, Russian Federation
University of Al-qasim Green, College of Biotechnology, Iraq

Доп.точки доступа:
Stolyar, S. V.; Krasitskaya, V. V.; Frank, L. A.; Yaroslavtsev, R. N.; Chekanova, L. A.; Gerasimova, Y. V.; Volochaev, M. N.; Bairmani, M. S.; Velikanov, D. A.

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16.

Polysaccharide-coated iron oxide nanoparticles: Synthesis, properties, surface modification / S. V. Stolyar, V. V. Krasitskaya, L. A. Frank [et al.] // Mater. Lett. - 2021. - Vol. 284. - Ст. 128920, DOI 10.1016/j.matlet.2020.128920. - Cited References:12. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Project No. 18-43-243003. This work was supported by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3). . - ISSN 0167-577X. - ISSN 1873-4979

РУБ Materials Science, Multidisciplinary + Physics, Applied

Кл.слова (ненормированные):
Nanoparticles -- Biomaterials -- Magnetic materials -- Polysaccharide
Аннотация: In this work, magnetite nanoparticles coated with polysaccharides were synthesized. Arabinogalactan and chitosan were used as polysaccharides. The possibilities of immobilization of biospecific molecules on the surface of the obtained composites were studied. Experiments on covalent immobilization of biospecific molecules on magnetic nanoparticles coated with a polysaccharide showed a high density of immobilized molecules. This suggests the use of such materials in bioanalytical systems or as affinity sorbents. (c) 2020 Elsevier B.V. All rights reserved.

WOS
Держатели документа:
RAS, Krasnoyarsk Sci Ctr, Fed Res Ctr, KSC,SB, Krasnoyarsk, Russia.
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
RAS, Inst Biophys, Fed Res Ctr, KSC,SB, Krasnoyarsk, Russia.
Astrakhan State Univ, Astrakhan, Russia.
Univ Al Qasim Green, Coll Biotechnol, Al Qasim, Iraq.

Доп.точки доступа:
Stolyar, S. V.; Krasitskaya, V. V.; Frank, L. A.; Yaroslavtsev, R. N.; Chekanova, L. A.; Gerasimova, Y. V.; Volochaev, M. N.; Bairmani, M. Sh.; Velikanov, D. A.; Russian Foundation for Fundamental ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory; Krasnoyarsk Territory Fund [18-43-243003]; Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK-1263.2020.3]

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17.

Poly-3-hydroxybutyrate/chitosan composite films and nonwoven mats / A. A. Sukhanova, A. E. Murzova, A. N. Boyandin [et al.] // Int. J. Biol. Macromol. - 2020. - Vol. 165. - P2947-2956, DOI 10.1016/j.ijbiomac.2020.10.177. - Cited References:54. - This study was carried out as part of the State Assignment of the Ministry of Education and Science of the Russian Federation to the team of the research laboratory "Intellectual Materials and Structures" within the project "Development of the methods for modifying polymer matrices containing particulate and fibrous fillers of various origins for creating smart multifunctional materials" (subject number FEFE-2020-0015). . - ISSN 0141-8130. - ISSN 1879-0003

РУБ Biochemistry & Molecular Biology + Chemistry, Applied + Polymer Science
Рубрики:
BIODEGRADABLE POLY-3-HYDROXYBUTYRATE
BIOMEDICAL APPLICATIONS
BACTERIAL
Кл.слова (ненормированные):
Composites -- Poly-3-hydroxybutyrate -- Chitosan -- Films -- Nonwoven mats -- Physicochemical properties -- Tissue engineering
Аннотация: Composite films and nonwoven mats of the poly-3-hydroxybutyrate and chitosan natural polymers were prepared and investigated. DSC and FTIR techniques were used to confirm that P(3HB) blending with chitosan resulted in a decrease in P(3HB) crystallinity to 47% and 62% in the films and nonwoven mats, respectively. Scanning electron microscopy showed that addition of chitosan induced changes in the surface morphology of the composite films and a reduction in the diameter of ultrafine fibers in the nonwoven mats from 800 nm to 460 nm. The values of water contact angle for films (53 degrees) and nonwoven mats (50.6 degrees) suggested that chitosan enhanced hydrophilic properties and moisture absorption capacity of the composite materials. On the other hand, P(3HB) showed its reinforcing ability and improved the physical/mechanical properties of chitosan. The work included studies of in vitro biodegradation of the composite specimens and their ability to maintain cell growth and attachment in NIH 3T3 fibroblast culture. (c) 2020 Published by Elsevier B.V.

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

Доп.точки доступа:
Sukhanova, A. A.; Murzova, A. E.; Boyandin, A. N.; Kiselev, E. G.; Sukovatyi, A. G.; Kuzmin, A. P.; Shabanov, A., V; Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [FEFE-2020-0015]

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18.

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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19.

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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20.

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.

WOS
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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