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Comparative investigation of polyhydroxyalkanoate scaffolds with various chemical compositions / E. D. Nikolaeva [и др.] // Cellular Transplantation and Tissue Engineering. - 2011. - Vol. 6, Is. 4. - С. 54-63 . - ISSN 1815-445X
Кл.слова (ненормированные):
Biopolymers -- Scaffolds -- Tissue engineering
Аннотация: The authors have constructed and characterized a series of membranes based on resorbable polyhydroxyalkanoates of different compositions. Five PHA types have been studied: a homopolymer of 3-hydroxybutyric acid, copolymers of 3-hydroxybutyric and 4-hydroxybutyric acids, 3-hydroxybutyric and 3-hydroxyvaleric acids, 3-hydroxybutyric and 3-hydroxyhexanoic acids. Scanning electron microscopy and atomicforce microscopy were used to examine the microstructure of membrane surfaces, showing that membranes based on the copolymer of 3-hydroxybutyrate and 3-hydroxyhexanoate had the roughest surface, while membranes based on the copolymer of 3-hydroxybutyrate and 3-hydroxyvalerate had the smoothest surface. The contact angle for water in air was smaller and hydrophilic properties better in the copolymer membranes than in the membranes based on the high-crystallinity homopolymer of 3-hydroxybutyric acid. The culture of mouse fibroblast cell line NIH 3,3 was used to test PHAbased membranes; results of fluorescent probes of DNA DAPI and the MTT assay show that membranes based on studied PHAs are not cytotoxic on direct contact with cells and are highly biocompatible; their adhesive properties and ability to maintain fibroblast proliferation are similar to those of polystyrene and better than those of polylactic acid membranes.

Scopus
Держатели документа:
Institute of Biophisycs, SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, RAS, Moscow, Russian Federation
Massachusetts Institute of Technology, Cambridge, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Nikolaeva, E.D.; Shishatskaya, E.I.; Mochalov, K.E.; Volova, T.G.; Sinsky, A.J.

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Electron spectroscopy of nanodiamond surface states / P. I. Belobrov [et al.] // Applied Surface Science. - 2003. - Vol. 215, Is. 1-4 SPEC. - P169-177, DOI 10.1016/S0169-4332(03)00287-3 . - ISSN 0169-4332
Кл.слова (ненормированные):
Auger electron spectroscopy -- Nanodiamond -- PEELS -- Surface states -- XPS -- Auger electron spectroscopy -- Diamonds -- Electrons -- Hydrogen -- Nanostructured materials -- Surfaces -- X ray photoelectron spectroscopy -- Nanodiamond (ND) surface states -- Surface phenomena
Аннотация: Electronic states of nanodiamond (ND) were investigated by PEELS, XPS and CKVV Auger spectra. Parallel electron energy loss spectra (PEELS) show that the electrons inside of ND particles are sp3 hybridized but there is a surface layer containing distinct hybridized states. The CKVV Auger spectra imply that the HOMO of the ND surface has a shift of 2.5eV from natural diamond levels of ?p up to the Fermi level. Hydrogen (H) treatment of natural diamond surface produces a chemical state indistinguishable from that of ND surfaces using CKVV. The ND electronic structure forms ?s1?p2?1 surface states without overlapping of ?-levels. Surface electronic states, including surface plasmons, as well as phonon-related electronic states of the ND surface are also interesting and may also be important for field emission mechanisms from the nanostructured diamond surface. В© 2003 Elsevier Science B.V. All rights reserved.

Scopus
Держатели документа:
Molecular Architecture Group, Institute of Biophysics SB RAS, UNESCO Dept. Krasnoyarsk Stt. T.U., Krasnoyarsk 660036, Russian Federation
School of Physics, University of Melbourne, Parkville, Vic. 3010, Australia
RRC Kurchatov Institute, Moscow 123182, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Belobrov, P.I.; Bursill, L.A.; Maslakov, K.I.; Dementjev, A.P.

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Untangling metabolic and spatial interactions of stress tolerance in plants. 1. Patterns of carbon metabolism within leaves / K. Y. Biel [et al.] // Protoplasma. - 2010. - Vol. 245, Is. 1. - P49-73, DOI 10.1007/s00709-010-0135-7 . - ISSN 0033-183X
Кл.слова (ненормированные):
Carbon metabolism -- Leaf anatomy -- Leaf form and function -- Maximal ecological utility -- Photosynthesis -- Stress tolerance Spinacia oleracea -- aspartate aminotransferase isoenzyme 1 -- bicarbonate -- carbon -- carbon dioxide -- catalase -- chlorophyll -- malate dehydrogenase -- oxygen -- ribulosebisphosphate carboxylase -- vegetable protein -- article -- enzymology -- histology -- light -- metabolism -- oxidation reduction reaction -- photosynthesis -- physiological stress -- physiology -- plant leaf -- spinach -- theoretical model -- Aspartate Aminotransferase, Cytoplasmic -- Bicarbonates -- Carbon -- Carbon Dioxide -- Catalase -- Chlorophyll -- Light -- Malate Dehydrogenase -- Models, Theoretical -- Oxidation-Reduction -- Oxygen -- Photosynthesis -- Plant Leaves -- Plant Proteins -- Ribulose-Bisphosphate Carboxylase -- Spinacia oleracea -- Stress, Physiological -- Spinacia oleracea
Аннотация: The localization of the key photoreductive and oxidative processes and some stress-protective reactions within leaves of mesophytic C3 plants were investigated. The role of light in determining the profile of Rubisco, glutamate oxaloacetate transaminase, catalase, fumarase, and cytochrome-c-oxidase across spinach leaves was examined by exposing leaves to illumination on either the adaxial or abaxial leaf surfaces. Oxygen evolution in fresh paradermal leaf sections and CO2 gas exchange in whole leaves under adaxial or abaxial illumination was also examined. The results showed that the palisade mesophyll is responsible for the midday depression of photosynthesis in spinach leaves. The photosynthetic apparatus was more sensitive to the light environment than the respiratory apparatus. Additionally, examination of the paradermal leaf sections by optical microscopy allowed us to describe two new types of parenchyma in spinach-pirum mesophyll and pillow spongy mesophyll. A hypothesis that oxaloacetate may protect the upper leaf tissue from the destructive influence of active oxygen is presented. The application of mathematical modeling shows that the pattern of enzymatic distribution across leaves abides by the principle of maximal ecological utility. Light regulation of carbon metabolism across leaves is discussed. В© 2010 Springer-Verlag.

Scopus
Держатели документа:
Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russian Federation
Biosphere Systems International Foundation, Oro Valley, AZ 85755, United States
International Scientific Centre for Organism Extreme States Research, Krasnoyarsk Scientific Centre, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Forest, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Biocompatible Plant Research Institute, College of Natural Sciences, California State University, Chico, CA 95929-0555, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Biel, K.Y.; Fomina, I.R.; Nazarova, G.N.; Soukhovolsky, V.G.; Khlebopros, R.G.; Nishio, J.N.

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SURFACE PHONONS IN MOLECULAR CRYSTALS. / V. G. Podoprigora [et al.] // Physica Status Solidi (B) Basic Research. - 1987. - Vol. 139, Is. 1. - P109-115 . - ISSN 0370-1972
Кл.слова (ненормированные):
HYDROCARBONS - Surfaces -- PHONONS -- MOLECULAR CRYSTALS -- SURFACE PHONONS -- CRYSTALS
Аннотация: The lattice dynamics of the surface layers of anthracene and beta -paradichlorobenzene crystals as well as of the adsorbed monolayer of paradibromobenzene on beta -paradichlorobenzene is investigated using the method of atom-atom potentials in slab dynamical calculations. The dynamic, structural, and electro-optical parameters of the surface crystal layers are compared with those for the bulk.

Scopus
Держатели документа:
Acad of Sciences of the USSR, Krasnoyarsk, USSR, Acad of Sciences of the USSR, Krasnoyarsk, USSR : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Podoprigora, V.G.; Remizov, I.A.; Shabanov, V.F.; Botvich, A.N.

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Protein-protein complexation in bioluminescence [Text] / M. S. Titushin [et al.] // Protein Cell. - 2011. - Vol. 2, Is. 12. - P957-972, DOI 10.1007/s13238-011-1118-y. - Cited References: 114. - The work was funded by "Fellowship for Young International Scientists" of Chinese Academy of Sciences. This work was supported by the National Natural Science Foundation of China (Grant Nos: 30870483, 31070660, 31021062 and 81072449), Ministry of Science and Technology of China (Nos. 2009DFB30310, 2009CB918803 and 2011CB911103), CAS Research Grants (Nos. YZ200839 and KSCX2-EW-J-3). . - ISSN 1674-800X

РУБ Cell Biology
Рубрики:
GREEN-FLUORESCENT PROTEIN
   LUCIFERIN-BINDING-PROTEIN
   RENILLA-RENIFORMIS LUCIFERASE
   VIBRIO-FISCHERI Y1
   JELLYFISH CLYTIA-GREGARIA
   ALPHA/BETA-HYDROLASE FOLD
   AMINO-ACID-SEQUENCE
   BACTERIAL LUCIFERASE
   ENERGY-TRANSFER
   CRYSTAL-STRUCTURE
Кл.слова (ненормированные):
green-fluorescent protein (GFP) -- photoprotein -- luciferase -- lumazine protein -- Forster resonance energy transfer (FRET) -- docking
Аннотация: In this review we summarize the progress made towards understanding the role of protein-protein interactions in the function of various bioluminescence systems of marine organisms, including bacteria, jellyfish and soft corals, with particular focus on methodology used to detect and characterize these interactions. In some bioluminescence systems, protein-protein interactions involve an "accessory protein" whereby a stored substrate is efficiently delivered to the bioluminescent enzyme luciferase. Other types of complexation mediate energy transfer to an "antenna protein" altering the color and quantum yield of a bioluminescence reaction. Spatial structures of the complexes reveal an important role of electrostatic forces in governing the corresponding weak interactions and define the nature of the interaction surfaces. The most reliable structural model is available for the protein-protein complex of the Ca2+-regulated photoprotein clytin and green-fluorescent protein (GFP) from the jellyfish Clytia gregaria, solved by means of X-ray crystallography, NMR mapping and molecular docking. This provides an example of the potential strategies in studying the transient complexes involved in bioluminescence. It is emphasized that structural studies such as these can provide valuable insight into the detailed mechanism of bioluminescence.

Держатели документа:
[Titushin, Maxim S.
Liu, Zhi-Jie] Chinese Acad Sci, Inst Biophys, Natl Lab Biomacromol, Beijing 100101, Peoples R China
[Feng, Yingang] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
[Lee, John] Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30602 USA
[Vysotski, Eugene S.] Russian Acad Sci, Siberian Branch, Inst Biophys, Lab Photobiol, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Titushin, M.S.; Feng, Y.G.; Lee, J...; Vysotski, E.S.; Liu, Z.J.

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NMR-derived Topology of a GFP-photoprotein Energy Transfer Complex [Text] / M. S. Titushin [et al.] // J. Biol. Chem. - 2010. - Vol. 285, Is. 52. - P40891-40900, DOI 10.1074/jbc.M110.133843. - Cited References: 54. - This work was supported by the National Natural Science Foundation of China, Ministry of Science and Technology of China, CAS Research Grant, CAS Fellowship for Young International Scientists Grant, Russian Foundation for Basic Research (08-09-92209 RFBR-China joint grant), SB RAS Grant 2, "Molecular and Cell Biology" program of RAS, Bayer AG (Germany), and by the University of Georgia Research Foundation and the Georgia Research Alliance. . - ISSN 0021-9258

РУБ Biochemistry & Molecular Biology
Рубрики:
GREEN-FLUORESCENT PROTEIN
   STRUCTURAL DETERMINANTS
   RENILLA BIOLUMINESCENCE
   ANGSTROM RESOLUTION
   CRYSTAL-STRUCTURE
   ELECTRON-DENSITY
   SOFTWARE
   PROGRAM
   BINDING
   SYSTEM
Аннотация: Forster resonance energy transfer within a protein-protein complex has previously been invoked to explain emission spectral modulation observed in several bioluminescence systems. Here we present a spatial structure of a complex of the Ca2+ regulated photoprotein clytin with its green-fluorescent protein (cgGFP) from the jellyfish Clytia gregaria, and show that it accounts for the bioluminescence properties of this system in vitro. We adopted an indirect approach of combining x-ray crystallography determined structures of the separate proteins, NMR spectroscopy, computational docking, and mutagenesis. Heteronuclear NMR spectroscopy using variously N-15, C-13, H-2-enriched proteins enabled assignment of backbone resonances of more than 94% of the residues of both proteins. In a mixture of the two proteins at millimolar concentrations, complexation was inferred from perturbations of certain H-1-N-15 HSQC-resonances, which could be mapped to those residues involved at the interaction site. A docking computation using HADDOCK was employed constrained by the sites of interaction, to deduce an overall spatial structure of the complex. Contacts within the clytin-cgGFP complex and electrostatic complementarity of interaction surfaces argued for a weak protein-protein complex. A weak affinity was also observed by isothermal titration calorimetry (K-D = 0.9 mM). Mutation of clytin residues located at the interaction site reduced the degree of protein-protein association concomitant with a loss of effectiveness of cgGFP in color-shifting the bioluminescence. It is suggested that this clytin-cgGFP structure corresponds to the transient complex previously postulated to account for the energy transfer effect of GFP in the bioluminescence of aequorin or Renilla luciferase.

Держатели документа:
[Wang, Jinfeng] Chinese Acad Sci, Inst Biophys, Natl Lab Biomacromol, Beijing 100101, Peoples R China
[Titushin, Maxim S.
Stepanyuk, Galina A.
Markova, Svetlana V.
Vysotski, Eugene S.] Russian Acad Sci, Inst Biophys, Siberian Branch, Lab Photobiol, Krasnoyarsk 660036, Russia
[Golz, Stefan] Bayer Schering Pharma AG, BSP GDD GTR TD GT, D-42096 Wuppertal, Germany
[Stepanyuk, Galina A.
Wang, Bi-Cheng
Lee, John] Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30602 USA
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Titushin, M.S.; Feng, Y.G.; Stepanyuk, G.A.; Li, Y...; Markova, S.V.; Golz, S...; Wang, B.C.; Lee, J...; Wang, J.F.; Vysotski, E.S.; Liu, Z.J.

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Planar bandpass filter with 100-dB suppression up to Tenfold passband frequency [] / B. A. Belyaev [et al.] // Prog. Electromagn. Res. C. - 2014. - Vol. 48. - P37-44 . - ISSN 1937-8718
Кл.слова (ненормированные):
Fractional bandwidths -- Microwave bandpass filter -- Optimization rules -- Passband frequencies -- Resonator filters -- Stripline resonators -- Substrate surface -- Suspended substrates -- Microwave filters -- Substrates
Аннотация: This paper proposes a miniature microwave bandpass filter. It comprises quasi-lumped suspended substrate stripline resonators of a new type. Their common substrate consists of two contiguous dielectric layers. Every resonator in the filter has three parallel strip conductors. Two of them are placed on the outer substrate surfaces and the rest is placed inside the substrate. The filter of the sixth order was designed with the use of special optimization rules that are universal for all resonator filters. The substrate of the fabricated filter was made of RT/Duroid 5880 (?r = 2.2, ? = 0.002) with thickness of 0.127mm. It has dimensions of 12 mm ? 45.5 mm. The measured passband has a center frequency of 1.01 GHz, 3-dB fractional bandwidth of 11%, and minimum insertion loss of 1.4dB. The 100-dB upper stopband extends up to 10.5 GHz.

Scopus
Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660074, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Belyaev, B.A.; Serzhantov, A.M.; Tyurnev, V.V.; Bal'Va, Y.F.; Leksikov, A.A.

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Electron spectroscopy of nanodiamond surface states [Text] / P. I. Belobrov [et al.] // Appl. Surf. Sci. - 2003. - Vol. 215: 4th International Vacuum Electron Sources Conference (JUL 15-19, 2002, SARATOV, RUSSIA), Is. 01.04.2013. - P. 169-177, DOI 10.1016/S0169-4332(03)00287-3. - Cited References: 33 . - ISSN 0169-4332

РУБ Chemistry, Physical + Materials Science, Coatings & Films + Physics, Applied + Physics, Condensed Matter
Рубрики:
AUGER LINE-SHAPES
   DIAMOND 111
   GRAPHITE
   EMISSION
Кл.слова (ненормированные):
nanodiamond -- surface states -- PEELS -- XPS -- Auger electron spectroscopy
Аннотация: Electronic states of nanodiamond (ND) were investigated by PEELS, XPS and CKVV Auger spectra. Parallel electron energy loss spectra (PEELS) show that the electrons inside of ND particles are sp(3) hybridized but there is a surface layer containing distinct hybridized states. The CKVV Auger spectra imply that the HOMO of the ND surface has a shift of 2.5 eV from natural diamond levels of sigma(p) up to the Fermi level. Hydrogen (H) treatment of natural diamond surface produces a chemical state indistinguishable from that of ND surfaces using CKVV. The ND electronic structure forms sigma(s)(1)sigma(p)(2)pi(1) surface states without overlapping of pi-levels. Surface electronic states, including surface plasmons, as well as phonon-related electronic states of the ND surface are also interesting and may also be important for field emission mechanisms from the nanostructured diamond surface. (C) 2003 Elsevier Science B.V. All rights reserved.

WOS
Держатели документа:
Russian Acad Sci, SB, Inst Biophys, Mol Architecture Grp, Krasnoyarsk 660036, Russia
Krasnoyarsk State Tech Univ, UNESCO Chair, Krasnoyarsk 660036, Russia
Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia
IV Kurchatov Atom Energy Inst, RRC, Moscow 123182, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Belobrov, P.I.; Bursill, L.A.; Maslakov, K.I.; Dementjev, A.P.

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Surface wettability and energy effects on the biological performance of poly-3-hydroxybutyrate films treated with RF plasma / D. S. Syromotina [et al.] // Mater. Sci. Eng. C. - 2016. - Vol. 62. - P450-457, DOI 10.1016/j.msec.2016.01.075 . - ISSN 0928-4931
Кл.слова (ненормированные):
Plasma -- Polar component -- poly-3-hydroxybutyrate membranes -- Surface energy -- Surface treatment -- Ammonia -- Biodegradable polymers -- Cell adhesion -- Contact angle -- Free energy -- Interfacial energy -- Plasma applications -- Plasmas -- Surface chemistry -- Surface properties -- Surface roughness -- Surface topography -- Wetting -- Biological performance -- Crystalline structure -- Polar components -- Poly-3-hydroxybutyrate -- Surface free energy -- Surface roughness changes -- Surface wettability -- Water contact angle -- Surface treatment
Аннотация: The surface properties of poly-3-hydroxybutyrate (P3HB) membranes were modified using oxygen and an ammonia radio-frequency (RF, 13.56 MHz) plasma. The plasma treatment procedures used in the study only affected the surface properties, including surface topography, without inducing any significant changes in the crystalline structure of the polymer, with the exception being a power level of 250 W. The wettability of the modified P3HB surfaces was significantly increased after the plasma treatment, irrespective of the treatment procedure used. It was revealed that both surface chemistry and surface roughness changes caused by the plasma treatment affected surface wettability. A treatment-induced surface aging effect was observed and resulted in an increase in the water contact angle and a decrease in the surface free energy. However, the difference in the water contact angle between the polymers that had been treated for 4 weeks and the untreated polymer surfaces was still significant. A dependence between cell adhesion and proliferation and the polar component of the surface energy was revealed. The increase in the polar component after the ammonia plasma modification significantly increased cell adhesion and proliferation on biodegradable polymer surfaces compared to the untreated P3HB and the P3HB modified using an oxygen plasma. © 2016 Elsevier B.V.

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WOS
Держатели документа:
Department of Experimental Physics, National Research Tomsk Polytechnic University, Tomsk, Russian Federation
Fraunhofer Institute for Interfacial Engineering and Biotechnology, IGB, Stuttgart, Germany
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
Technical Chemistry II and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany

Доп.точки доступа:
Syromotina, D. S.; Surmenev, R. A.; Surmeneva, M. A.; Boyandin, A. N.; Nikolaeva, E. D.; Prymak, O.; Epple, M.; Ulbricht, M.; Oehr, C.; Volova, T. G.

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10.

Comparative evaluation of total peroxidase and catalase activities during light emission of luminous fungus Neonothopanus nambi / O. A. Mogilnaya, N. O. Ronzhin, V. S. Bondar // Mycosphere. - 2016. - Vol. 7, Is. 4. - P499-510, DOI 10.5943/mycosphere/7/4/9 . - ISSN 2077-7000
Кл.слова (ненормированные):
Basidiomycetes -- Hydrogen peroxide -- Luminescence -- Stress
Аннотация: Submerged cultivation of luminous fungus Neonothopanus nambi under orbital stirring causes formation of pellets with smooth or rough surfaces. The experiments showed that luminescence of the pellets washed in water increased considerably. Previous studies suggested possible participation of peroxidases in the light emitting reaction. In this study, oxidative azo coupling reaction accompanied by formation of chromogen was used to evaluate peroxidase activity in vivo, in brightly luminescent pellets and in pellets with low luminescence intensity (dim ones). Staining of the brightly luminescent pellets took a few minutes, and their staining intensity was several times higher than that of the dim pellets. From the results of in vivo experiments it was concluded that the bright pellets differed from the dim ones in the production of hydrogen peroxide, or, possibly, other peroxides. Measurements of total peroxidase and catalase activities in pellet extracts also showed an increase in enzyme activities along with an increase in luminescence intensity of native pellets. However, results of the in vitro experiments do not definitively suggest a direct relationship between luminescence and activity of these enzymes. We assume that luminescence of this fungal species may be an additional way to neutralize peroxide compounds under stress. © Guizhou Academy of Agricultural Sciences.

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

Доп.точки доступа:
Mogilnaya, O. A.; Ronzhin, N. O.; Bondar, V. S.

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11.

Production and characterization of bioaerosols for model validation in spacecraft environment / A. Salmela [et al.] // J. Environ. Sci. - 2018. - Vol. 69. - P227-238, DOI 10.1016/j.jes.2017.10.016. - Cited References:28. - The research leading to these results has received funding from the European Union Seventh Framework Programme (FP/2007-2013) under grant agreement number 263076 within the BIOSMHARS Project (BIO contamination Specific Modeling in Habitats Related to Space). . - ISSN 1001-0742. - ISSN 1878-7320

РУБ Environmental Sciences
Рубрики:
INDOOR AIR
   MICROBIAL-CONTAMINATION
   BUILDING-MATERIALS
   FUNGAL
Кл.слова (ненормированные):
Bioaerosol -- Modeling -- CFD -- Spacecraft -- Fungi -- Bacteria
Аннотация: This study aimed to evaluate the suitability of two bioaerosol generation systems (dry and wet generation) for the aerosolization of microorganisms isolated from the International Space Station, and to calibrate the produced bioaerosols to fulfill the requirements of computational fluid dynamics model (CFD) validation. Concentration, stability, size distribution, agglomeration of generated bioaerosol and deposition of bioaerosols were analyzed. In addition, the dispersion of non-viable particles in the air was studied. Experiments proved that wet generation from microbial suspensions could be used for the production of well-calibrated and stabile bioaerosols for model validation. For the simulation of the natural release of fungal spores, a dry generation method should be used. This study showed that the used CFD model simulated the spread of non-viable particles fairly well. The mathematical deposition model by Lai and Nazaroff could be used to estimate the deposition velocities of bioaerosols on surfaces, although it somewhat underestimated the measured deposition velocities. (c) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

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Держатели документа:
Univ Eastern Finland, Dept Environm & Biol Sci, POB 1627, FI-70211 Kuopio, Finland.
VTT Ltd, POB 1300, FI-33100 Tampere, Finland.
Belgian Nucl Res Ctr, Microbiol Unit, B-2400 Mol, Belgium.
Inst Med & Physiol Spatiales, BP 74404, F-31405 Toulouse, France.
Inst Biomed Problems, 76-A Khoroshev Skoye Shosse, RU-123007 Moscow, Russia.
RAS, Inst Biophys SB, RU-660036 Krasnoyarsk, Russia.

Доп.точки доступа:
Salmela, Anniina; Kokkonen, Eero; Kulmala, Ilpo; Veijalainen, Anna-Maria; van Houdt, Rob; Leys, Natalie; Berthier, Audrey; Viacheslav, Ilyin; Kharin, Sergey; Morozova, Julia; Tikhomirov, Alexander; Pasanen, Pertti; Van, Rob; European Union [263076]

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12.

Low-temperature argon and ammonia plasma treatment of poly-3-hydroxybutyrate films: Surface topography and chemistry changes affect fibroblast cells in vitro / R. A. Surmenev [et al.] // Eur Polym J. - 2019. - Vol. 112. - P137-145, DOI 10.1016/j.eurpolymj.2018.12.040 . - ISSN 0014-3057
Кл.слова (ненормированные):
Cell adhesion -- Dielectric barrier discharge -- Plasma treatment -- Surface etching -- Wetting behaviour -- Ammonia -- Argon -- Cell adhesion -- Cell culture -- Chemical modification -- Contact angle -- Dielectric materials -- Electric discharges -- Fibroblasts -- Mammals -- Nitrogen plasma -- Plasma applications -- Surface roughness -- Surface treatment -- Temperature -- Topography -- Ammonia plasma treatment -- Dielectric barrier discharges -- Different proportions -- Plasma treatment -- Poly-3-hydroxybutyrate -- Poly3-hydroxybutyrate (PHB) -- Surface etching -- Wetting behaviour -- Wetting
Аннотация: Poly-3-hydroxybutyrate (PHB) films were plasma-treated using pure NH3, pure Ar or mixtures of the two different proportions (20%, 30%, 40%, 50%, 70% NH3 in Ar). Surface chemistry and surface topography changes of PHB films were observed after plasma processing in all plasma regimes. The XPS results confirmed the absence of chemical modification in the case of pure Ar plasma treatment. Nitrogen-containing groups (e.g., N–C[dbnd]O) were detected on the surfaces of P3HB films treated with NH3-containing plasma. The surfaces of the untreated P3HB films were hydrophobic, and plasma treatment turned the surfaces hydrophilic, irrespective of the treatment. A significant decrease in the contact angle and an increase in the free surface energy were observed. An insignificant surface ageing effect was observed when P3HB samples were exposed to air for 10 days. In NIH 3T3 mice fibroblast cells, cell adhesion was significantly improved after plasma treatment in an Ar atmosphere, which is likely related to the fact that there was a surface ? potential of 88.6 mV at neutral pH, causing a cleavage of the polymer chains and an increase in surface roughness. © 2018 Elsevier Ltd

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Держатели документа:
Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Stuttgart, 70569, Germany
Synchrotron Radiation Facility ANKA, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Surmenev, R. A.; Chernozem, R. V.; Syromotina, D. S.; Oehr, C.; Baumbach, T.; Krause, B.; Boyandin, A. N.; Dvoinina, L. M.; Volova, T. G.; Surmeneva, M. A.

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13.

Bioluminescent aptamer-based solid-phase microassay to detect lung tumor cells in plasma / E. E. Bashmakova [et al.] // Talanta. - 2019. - Vol. 199. - P674-678, DOI 10.1016/j.talanta.2019.03.030. - Cited References:19. - The authors are grateful to the staff of Krasnoyarsk regional clinical oncology center named after A.I. Kryzhanovsky and particularly doctor Alexey V. Krat for the experimental material provided. This work was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences, project No. 0356-2017-0017. . - ISSN 0039-9140. - ISSN 1873-3573

РУБ Chemistry, Analytical
Рубрики:
CONJUGATED NANOPARTICLES
   CANCER
   COLLECTION
   LIGANDS
   PROBES
Кл.слова (ненормированные):
DNA aptamers -- Lung tumor -- Bioluminescent solid-phase microassay
Аннотация: Two high-affinity DNA aptamers for lung tumor cells were applied as biospecific elements in bioluminescent assay of patient blood. The oligonucleotide complementary to the 5' end of both aptamers carrying either biotin or Ca2+-regulated photoprotein obelin was used to form a sandwich-type analytical complex on the surfaces of magnetic streptavidin-activated microspherical particles. Clinical blood samples from cases of morphologically confirmed lung cancer and control samples were analyzed applying the developed assay. From the receiver operator curve (ROC) analysis, the chosen threshold value as clinical decision limit offers the sensitivity of 91.5% and the specificity of 75% (p < 0.001). The area under ROC curve with the value of 0.901 distinguishes well between the two groups under investigation.

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Держатели документа:
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Inst Biophys SB, Akademgorodok 50-50, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny Pr 79, Krasnoyarsk 660041, Russia.
State Med Univ, Partizana Zheleznyaka St 1, Krasnoyarsk 660022, Russia.

Доп.точки доступа:
Bashmakova, Eugenia E.; Krasitskaya, Vasilisa V.; Zamay, Galina S.; Zamay, Tatiana N.; Frank, Ludmila A.; Russian Academy of Sciences [0356-2017-0017]

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14.

The effect of deicing salt solutes on Moina macrocopa and Allium cepa in a toxicity test experiment / T. S. Lopatina, Y. V. Aleksandrova, O. V. Anishchenko [и др.] // Vestn. Tomsk. Gos. Univ. Biol. - 2020. - Is. 51. - С. 162-178, DOI 10.17223/19988591/51/9 . - ISSN 1998-8591
Кл.слова (ненормированные):
Aquatic ecosystems -- Cladocera, Allium-test -- Salinity -- Toxicity test
Аннотация: Chloride salts are the most commonly used deicing materials for winter maintenance of roads. Numerous studies indicate a significant increase in the salinity of aquatic ecosystems associated with the long-term use of deicing materials in countries located in cold climates. The functioning of ecosystems largely depends on salinity, since salinity is one of the key factors determining the species composition, the structure of food webs and the productivity of aquatic communities. Given the growing threat of salinization of groundwater and surface waters, it is extremely important to study the effect of deicing materials on the biota and functioning of aquatic ecosystems. The aim of this research is to determine the threshold concentrations of solutions of the deicing salt mixture “Bionord” containing sodium and calcium chlorides, at which negative effects on the development of animal and plant test objects are observed. In this study, we used the salt-containing mixture “Bionord” as a model deicer. Similarly, with the most commonly used ice melting chemicals, the «Bionord» salt mixture contains a large amount of sodium and calcium chlorides (about 85% of the total weight). To evaluate the toxicity of the deicer solutions, we used acute and chronic toxicity tests with cladoceran Moina macrocopa (Straus, 1820) (Cladocera: Moinidae) and standard onion-based test with Allium cepa L. (Liliopsida: Amaryllidaceae) (Allium-test). In acute and chronic toxicity tests with Cladocera, the females on the first day of their life (body size 0.5-0.6 mm) were placed individually in jars with aged (not less than for 72 h) tap water with a volume of 20 ml with the addition of a deicer at a certain concentration. A group of animals that was placed in the medium without the deicer was used as a control. In the acute toxicity tests, we used the following concentration of the deicer: 1.3; 2.5; 4.0, 5.0; 6.0; 8.0; 10.0 g/l. The mortality of animals was recorded 24 and 48 hours after the start of the experiment. The concentration of the deicer (LC50) at which 50% of animals was observed to die, compared to the control, was determined in the acute toxicity test. In a chronic toxicity test, animals were tested in the following range of concentrations of the deicer: 0.3; 0.6; 1.3; 2.5; 5.0; 6.0 and 8.0 g/l. The chronic toxicity test was conducted until the death of all test animals. Based on the data obtained in the chronic toxicity test, the specific growth rate of juvenile females, average fecundity, and average life span of M. macrocopa were calculated for each concentration of the deicer. Bulbs of onions of the Stuttgartenrisen variety with a diameter of 1.8 ± 0.1 cm and a weight of 2.27 ± 0.17 g were used in the onion test. Bulbs with their bottoms were placed in test tubes containing 20 ml of a solute of the deicer or tap water for 48 hours. Three bulbs were tested for each concentration and for the control. The following concentrations of the deicer were used in the onion test: 1.0; 2.5; 5.0; 7.0; 10.0; 15.0; 20.0; 50.0 g/l. The general toxic and cytotoxic effects were evaluated in the onion test. The average root length and the total root length on each bulb were used as indicators of the total toxicity of the solutions of deicer. To evaluate proliferative activity, we calculated the mitotic index as the fraction of dividing cells in the apical root meristem to the total number of cells. Based on the results of the experiments, we determined median effective mixture concentrations (EC50) at which there is a 50% decrease, compared to the control, in the values of root growth indicators: average root length, sum of root lengths on each bulb and mitotic index. Median lethal concentration (LC50) of the deicing salt determined in the 48-hour acute toxicity test with females of M. macrocopa was equal to 5.1 g/l. In the chronic test, we showed that the exposure to the solutions of the deicing salt in the range of concentrations from 0.3 to 5.0 g/l does not affect the life span, specific growth rate of juveniles and fecundity of females of M. macrocopa. The median effective concentration (EC50) of the deicing salt determined in the Allium-tests were 6.3, 5.2 and 10.4 g/l for the sum of root lengths, average root length on each bulb and proliferative activity at the tips of roots (mitotic index), respectively (See Table 1 and 2). Complete inhibition of onion root growth was observed at the concentration of the decider equal to 20 g/l, while the death of all test animals in the acute toxicity test occurred at the concentration of the deicer equal to 8,0 g/l (See Fig. 1). Thus, we demonstrated that similar concentrations of the deicer induced 50% inhibition of the growth of onion roots and 50% mortality of cladocerans. These values, in general, corresponded to a critical salinity of 5-8 % above which qualitative changes occur both in the external and internal condition of aquatic animals. The electrical conductivity of the deicer solutions, which had a negative effect on the selected test species, coincides with the previously obtained values of the electrical conductivity of sodium chloride solutions harmful to cladocerans. We can assume that the main mechanism of the effect of the deicing material that we study is associated with the biological effect of its chlorine and sodium salts. Taking this into account, the value of electrical conductivity measured for solutions of deicing salt can be used to assess its negative potential effects. We estimated that in the absence of timely cleaning, regulated by the rules for using the material, the runoff from each square meter of the treated surface can lead to the pollution of 8-13 liters of fresh water. Thus, the basic requirement for the use of deicing salts on roads is the need to comply with the cleaning regime of the treated surfaces. Otherwise, the gradual accumulation of sodium and calcium chlorides in water bodies can cause an increase in salinity which will affect the survival of freshwater aquatic organisms and lead to serious disturbances in the functioning of aquatic ecosystems. © 2020 Tomsk State University. All rights reserved.

Scopus
Держатели документа:
Laboratory of Ecosystem Biophysics, Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch, Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Laboratory of Bioluminescent and Environmental Technologies, Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch, Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Analytical Laboratory, Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch, Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Department of Biophysics, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodniy Ave, Krasnoyarsk, 660041, Russian Federation
Laboratory of Ecosystem Biophysics, Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch, Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Lopatina, T. S.; Aleksandrova, Y. V.; Anishchenko, O. V.; Gribovskaya, I. V.; Oskina, N. A.; Zotina, T. A.; Zadereev, E. S.

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15.

РУБ Biology + Ecology
Рубрики:
DAPHNIA-MAGNA
   NACL SALINITY
   ROAD SALTS
   WATER
   FRESH
   CHLORIDE
Кл.слова (ненормированные):
salinity -- toxicity test -- Cladocera -- Allium-test -- aquatic ecosystems
Аннотация: Chloride salts are the most commonly used deicing materials for winter maintenance of roads. Numerous studies indicate a significant increase in the salinity of aquatic ecosystems associated with the long-term use of deicing materials in countries located in cold climates. The functioning of ecosystems largely depends on salinity, since salinity is one of the key factors determining the species composition, the structure of food webs and the productivity of aquatic communities. Given the growing threat of salinization of groundwater and surface waters, it is extremely important to study the effect of deicing materials on the biota and functioning of aquatic ecosystems. The aim of this research is to determine the threshold concentrations of solutions of the deicing salt mixture "Bionord" containing sodium and calcium chlorides, at which negative effects on the development of animal and plant test objects are observed. In this study, we used the salt-containing mixture "Bionord" as a model deicer. Similarly, with the most commonly used ice melting chemicals, the "Bionord" salt mixture contains a large amount of sodium and calcium chlorides (about 85% of the total weight). To evaluate the toxicity of the deicer solutions, we used acute and chronic toxicity tests with cladoceran Moina macrocopa (Straus, 1820) (Cladocera: Moinidae) and standard onion-based test with Allium cepa L. (Liliopsida: Amaryllidaceae) (Allium-test). In acute and chronic toxicity tests with Cladocera, the females on the first day of their life (body size 0.5-0.6 mm) were placed individually in jars with aged (not less than for 72 h) tap water with a volume of 20 ml with the addition of a deicer at a certain concentration. A group of animals that was placed in the medium without the deicer was used as a control. In the acute toxicity tests, we used the following concentration of the deicer: 1.3; 2.5; 4.0, 5.0; 6.0; 8.0; 10.0 g/l. The mortality of animals was recorded 24 and 48 hours after the start of the experiment. The concentration of the deicer (LC50) at which 50% of animals was observed to die, compared to the control, was determined in the acute toxicity test. In a chronic toxicity test, animals were tested in the following range of concentrations of the deicer: 0.3; 0.6; 1.3; 2.5; 5.0; 6.0 and 8.0 g/l. The chronic toxicity test was conducted until the death of all test animals. Based on the data obtained in the chronic toxicity test, the specific growth rate of juvenile females, average fecundity, and average life span of M. macrocopa were calculated for each concentration of the deicer. Bulbs of onions of the Stuttgartenrisen variety with a diameter of 1.8 +/- 0.1 cm and a weight of 2.27 +/- 0.17 g were used in the onion test. Bulbs with their bottoms were placed in test tubes containing 20 ml of a solute of the deicer or tap water for 48 hours. Three bulbs were tested for each concentration and for the control. The following concentrations of the deicer were used in the onion test: 1.0; 2.5; 5.0; 7.0; 10.0; 15.0; 20.0; 50.0 g/l. The general toxic and cytotoxic effects were evaluated in the onion test. The average root length and the total root length on each bulb were used as indicators of the total toxicity of the solutions of deicer. To evaluate proliferative activity, we calculated the mitotic index as the fraction of dividing cells in the apical root meristem to the total number of cells. Based on the results of the experiments, we determined median effective mixture concentrations (EC50) at which there is a 50% decrease, compared to the control, in the values of root growth indicators: average root length, sum of root lengths on each bulb and mitotic index. Median lethal concentration (LC50) of the deicing salt determined in the 48-hour acute toxicity test with females of Al. macrocopa was equal to 5.1 g/l. In the chronic test, we showed that the exposure to the solutions of the deicing salt in the range of concentrations from 0.3 to 5.0 g/l does not affect the life span, specific growth rate of juveniles and fecundity of females of M. macrocopa. The median effective concentration (EC50) of the deicing salt determined in the Allium-tests were 6.3, 5.2 and 10.4 g/l for the sum of root lengths, average root length on each bulb and proliferative activity at the tips of roots (mitotic index), respectively (See Table 1 and 2). Complete inhibition of onion root growth was observed at the concentration of the decider equal to 20 g/l, while the death of all test animals in the acute toxicity test occurred at the concentration of the deicer equal to 8,0 g/l (See Fig. 1). Thus, we demonstrated that similar concentrations of the deicer induced 50% inhibition of the growth of onion roots and 50% mortality of cladocerans. These values, in general, corresponded to a critical salinity of 5-8 %o above which qualitative changes occur both in the external and internal condition of aquatic animals. The electrical conductivity of the deicer solutions, which had a negative effect on the selected test species, coincides with the previously obtained values of the electrical conductivity of sodium chloride solutions harmful to cladocerans. We can assume that the main mechanism of the effect of the deicing material that we study is associated with the biological effect of its chlorine and sodium salts Taking this into account, the value of electrical conductivity measured for solutions of deicing salt can be used to assess its negative potential effects. We estimated that in the absence of timely cleaning, regulated by the rules for using the material, the runoff from each square meter of the treated surface can lead to the pollution of 8-13 liters of fresh water. Thus, the basic requirement for the use of deicing salts on roads is the need to comply with the cleaning regime of the treated surfaces. Otherwise, the gradual accumulation of sodium and calcium chlorides in water bodies can cause an increase in salinity which will affect the survival of freshwater aquatic organisms and lead to serious disturbances in the functioning of aquatic ecosystems.

WOS
Держатели документа:
Russian Acad Sci, Fed Res Ctr, Inst Biophys, Siberian Branch,Krasnoyarsk Sci Ctr,Lab Ecosyst B, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Fed Res Ctr, Inst Biophys, Siberian Branch,Krasnoyarsk Sci Ctr,Lab Biolumine, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Fed Res Ctr, Inst Biophys, Siberian Branch,Krasnoyarsk Sci Ctr,Analyt Lab, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Fundamental Biol & Biotechnol, Dept Biophys, 79 Svobodniy Ave, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Lopatina, Tatiana S.; Aleksandrova, Yuliyana, V; Anishchenko, Olesya, V; Gribovskaya, Iliada, V; Oskina, Nataliya A.; Zotina, Tatiana A.; Zadereev, Egor S.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Krai; Krasnoyarsk Krai Fund for Supporting Scientific and Scientific-Technical Activities [19-44-240014]

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16.

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

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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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