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Popov V.M.,Voronezh State Forestry Engineering Academy
Russian Aeronautics | Year: 2013

A technology of polymer adhesive modification is suggested for adhesives used in aircraft structures bonding. The technology is based on exposure of polymer component melt of the adhesive to an electric and wave field. A decrease of internal stresses and increase of the strength of adhesive joints based on modified adhesives are experimentally established. Electron microscopic and X-ray structural analyses indicated the mechanism of strength enhancement of adhesive joints based on modified adhesives due to adjustment of their structure on the nanoscale level. © 2013 Allerton Press, Inc. Source

Mashkina O.S.,Voronezh State University | Tabatskaya T.M.,Research Institute of Forest Genetics and Breeding | Gorobets A.I.,Voronezh State Forestry Engineering Academy | Shestibratov K.A.,RAS Shemyakin Ovchinnikov Institute of Bioorganic Chemistry
Applied Biochemistry and Microbiology | Year: 2010

Conditions of cultivation and micropropagation of selected biotypes of five willow species (Salyx dasyclados Wimm., S. caspica Pall., S. triandra L., S. purpurea L., and S. viminalis L.) and two hybrids (×S. acuminata S. and ×S. palustris Host.) were optimized. Data on in vitro propagation of S. caspica, S. triandra, S. purpurea together with hybrids S. acuminata and S. palustris were obtained for the first time. It has been demonstrated that the outcome of cultivation and propagation of willows strongly depends on genotypic peculiarities of initial plants. The optimal terms of isolation and sterilization of single-node segments for obtaining 50-75% of aseptic viable developing cultures were estimated. The nutritive media were selected providing induction of stem development (to 67%), their rooting (to 91%), elongation (to 3-6 cm), and multiplication (propagation coefficient of 4). The designed method (adopted to different genotypes) can be applied for obtaining aseptic in vitro cultures serving as initial plant material for genetic transformation and mass propagation of plants with new agriculturally valuable characteristics which are of interest for construction of bioenergetic plantations and for needs of the paper industry. © 2010 Pleiades Publishing, Ltd. Source

Nikulina N.S.,Voronezh State Forestry Engineering Academy | Nikulin S.S.,Voronezh State Technical University
Polymer Science - Series D | Year: 2012

It was shown that the use of a pulse magnetic field and ultrasound makes it possible to increase the strength of the adhesive joint from modified wood. © 2012 Pleiades Publishing, Ltd. Source

Bel'chinskaya L.I.,Voronezh State Forestry Engineering Academy | Khodosova N.A.,Voronezh State Forestry Engineering Academy | Strel'nikova O.Y.,Voronezh State Forestry Engineering Academy | Petukhova G.A.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | Ciganda L.,Technological Center Lurederra
Protection of Metals and Physical Chemistry of Surfaces | Year: 2015

The possibility of regulating the sorption processes on clinoptilolite and nontronite by acidic and basic modifications was found. The effect of the aluminosilicate structure and the nature and concentration of modifying agent on the adsorption and surface characteristics of mineral sorbents was determined. An increase in the sorption capacity of natural minerals as a result of preadsorption treatment with solutions of sulfuric, hydrochloric, and nitric acids, as well as sodium hydroxide and ammonium hydroxide, was shown. An ambiguous effect of the nature and concentration of various modifiers on the formaldehyde adsorption was found. An increase in the specific surface and pore volume of minerals occurs during acidic treatment. The action of sodium hydroxide results in a decrease in the nontronite specific surface and an increase in the pore volume. Treatment with ammonium hydroxide does not affect the surface characteristics of the sorbents. The most effective modifiers for clinoptilolite in the formaldehyde adsorption are 0.5 M hydrochloric acid and 1.5 M ammonium hydroxide; for nontronite, 1.0 M sulfuric acid is most effective. © 2015, Pleiades Publishing, Ltd. Source

Bel'chinskaya L.I.,Voronezh State Forestry Engineering Academy | Khokhlov V.Yu.,Voronezh State University | Lu T.Y.,Voronezh State University | Petukhova G.A.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | And 2 more authors.
Protection of Metals and Physical Chemistry of Surfaces | Year: 2012

The chemical and adsorption-structural properties of natural nanoporous mineral sorbent M 45C 20 having two main components (clay-montmorillonite and zeolite-clinoptilolite) and treated with 2 M NaOH solution are investigated. It is ascertained based on the results of chemical analysis, X-ray diffraction, electron microscopy, and IR spectrometry that alkali treatment results in modification of the chemical composition and structure of the mineral sorbent M 45C 20 and significantly improves its adsorption properties. © Pleiades Publishing, Ltd., 2012. Source

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