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1.
V. V. Istratov V. T. Tarasyuk V. A. Vasnev N. A. Borisova 《Polymer Science Series B》2013,55(3-4):218-225
A series of new branched block copolymers was synthesized and investigated, and their physicochemical and surface properties were determined. It was shown that all of the prepared block copolymers demonstrate well-defined surface activity dependent on the ratio of hydrophilic and lipophilic fragments of macromolecule as well as on the copolymer structure. The resulting copolymers were used as surfactants to obtain microemulsions and microcapsules. It was found that the size of emulsion drops stabilized by branched copolymers increased more slowly than that of drops stabilized by linear copolymers. During the preparation of microcapsules through the use of branched copolymers as surfactants, unlike that through the use of linear copolymer surfactants, a high effectiveness of encapsulation and a smaller particle size were observed. 相似文献
2.
In this study, new biodegradable and biocompatible amphiphilic polymers were obtained by modifying the peripheral hydroxyl groups of branched polyethers and polyesters with organosilicon substituents. The structures of the synthesized polymers were confirmed by NMR and GPC. Organosilicon moieties of the polymers were formed by silatranes and trimethylsilyl blocks and displayed hydrophilic and hydrophobic properties, respectively. The effect of the ratio of hydrophilic to hydrophobic organosilicon structures on the surface activity and biological activity of macromolecules was studied, together with the effect on these activities of the macromolecules’ molecular weight and chemical structure. In particular, the critical micelle concentrations were determined, the effect of the structure of the polymers on their wetting with aqueous solutions on glass and parafilm was described, and the aggregation stability of emulsions was studied. Finally, the effect of the polymer structures on their antifungal activity and seed germination stimulation was examined. 相似文献
3.
M. N. Gerke A. V. Istratov D. N. Bukharov O. A. Novikova I. O. Skryabin S. M. Arakelian 《Bulletin of the Russian Academy of Sciences: Physics》2017,81(12):1387-1390
The surface resistance of bimetallic granular films prepared by means of laser-induced deposition is studied. The possibility of modeling their conductivity is demonstrated, depending on their morphological properties. 相似文献
4.
V. M. Gvemyachkin A. G. Istratov O. I. Leipunskii 《Journal of Applied Mechanics and Technical Physics》1974,15(4):494-499
The formation of condensed oxide particles in combustion of metal droplets is discussed; it is assumed that the characteristic diffusion time is much less than the characteristic time for the heterogeneous reaction at the condensate particle surfaces, and the structure of the reaction zone is discussed; the size spectrum is derived for the condensed oxide particles. It is found that condensation in the gas has little effect on the droplet combustion rate. Heat needed to evaporate the metal is produced directly at the surface of the drop and the rate-limiting step in the combustion is the diffusion of oxidant to the surface. 相似文献
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6.
Arakelian S. M. Kucherik A. O. Kutrovskaya S. V. Osipov A. V. Khorkov K. S. Istratov A. V. 《Crystallography Reports》2018,63(7):1173-1177
Crystallography Reports - The physical properties of solid structures depending on the boundary conditions in topologically ordered nanocluster systems are discussed. These systems are synthesized... 相似文献
7.
A. Antipov S. Arakelian T. Vartanyan M. Gerke A. Istratov S. Kutrovskaya A. Kucherik A. Osipov 《Optics and Spectroscopy》2016,121(5):765-768
The optical properties of multilayer bimetallic films composed of silver and gold nanoparticles have been investigated. The dependence of the transmission spectra of the films on their morphology is demonstrated. A finite-difference time-domain (FDTD) simulation has confirmed that there is a dependence of the transmission spectra on the average distance between particles and the number of deposited layers. 相似文献
8.
A.A. Yukhimchuk V.A. Apasov Yu.I. Vinogradov A.N. Golubkov E.V. Gornostaev S.K. Grishechkin L.V. Drakin N.A. Zagoruiko V.N. Istratov P.D. Ishkov A.A. Kononenko G.I. Karyakin V.G. Klevtsov V.A. Klisch V.N. Lobanov A.P. Maksimenko S.S. Matveev A.E. Nikitin V.I. Pustovoy I.I. Sukhoi V.M. Solyankin B.N. Tenyaev V.M. Kharitonov 《Hyperfine Interactions》1999,119(1-4):341-344
A facility is described that allows safe handling of high tritium gas activity as dozens kilocuries in a regular laboratory
environment. It is used to make and deliver into the target a mixture of specific isotopic composition with the contamination
requirement of 10-7 v.f. for Z>1 elements, and recover it upon completion of operation. With this facility, efforts have been accomplished to investigate
into the muon catalyzed fusion on two targets – liquid tritium and high-pressure tritium types. Also, the operation range
was 0.1–120 MPa for pressure and 20–800 K for temperature and the amount of tritium used was about 100 kCi. The facility showed
reliability in operation without indications of radiation beyond the safety level.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
9.
Iron and its complexes in silicon 总被引:3,自引:0,他引:3
A.A. Istratov H. Hieslmair E.R. Weber 《Applied Physics A: Materials Science & Processing》1999,69(1):13-44
This article is the first in a series of two reviews on the properties of iron in silicon. It offers a comprehensive summary
of the current state of understanding of fundamental physical properties of iron and its complexes in silicon. The first section
of this review discusses the position of iron in the silicon lattice and the electrical properties of interstitial iron. Updated
expressions for the solubility and the diffusivity of iron in silicon are presented, and possible explanations for conflicting
experimental data obtained by different groups are discussed. The second section of the article considers the electrical and
the structural properties of complexes of interstitial iron with shallow acceptors (boron, aluminum, indium, gallium, and
thallium), shallow donors (phosphorus and arsenic) and other impurities (gold, silver, platinum, palladium, zinc, sulfur,
oxygen, carbon, and hydrogen). Special attention is paid to the kinetics of iron pairing with shallow acceptors, the dissociation
of these pairs, and the metastability of iron–acceptor pairs. The parameters of iron-related defects in silicon are summarized
in tables that include more than 30 complexes of iron as detected by electron paramagnetic resonance (EPR) and almost 20 energy
levels in the band gap associated with iron. The data presented in this review illustrate the enormous complexing activity
of iron, which is attributed to the partial or complete (depending on the temperature and the conductivity type) ionization
of iron as well as the high diffusivity of iron in silicon. It is shown that studies of iron in silicon require exceptional
cleanliness of experimental facilities and highly reproducible diffusion and temperature ramping (quenching) procedures. Properties
of iron that are not yet completely understood and need further research are outlined.
Received: 14 December 1998 / Accepted: 22 February 1999 / Published online: 26 May 1999 相似文献
10.
Russian Chemical Bulletin - A series of poly(β-amino esters) were synthesized using the Michael addition reaction from 1-(3-aminopropyl)silatrane and glycol diacrylates. The structure of the... 相似文献