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  Subjects -> PHYSICS (Total: 834 journals)
    - ELECTRICITY AND MAGNETISM (9 journals)
    - MECHANICS (21 journals)
    - NUCLEAR PHYSICS (52 journals)
    - OPTICS (91 journals)
    - PHYSICS (602 journals)
    - SOUND (26 journals)
    - THERMODYNAMICS (33 journals)

PHYSICS (602 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 741 Journals sorted alphabetically
Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 7)
Acta Mechanica     Hybrid Journal   (Followers: 21)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
Advanced Composite Materials     Hybrid Journal   (Followers: 71)
Advanced Functional Materials     Hybrid Journal   (Followers: 57)
Advanced Materials     Hybrid Journal   (Followers: 288)
Advanced Science Focus     Free   (Followers: 5)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advanced Studies in Theoretical Physics     Open Access  
Advances in Condensed Matter Physics     Open Access   (Followers: 10)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 1)
Advances in Geophysics     Full-text available via subscription   (Followers: 6)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 25)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 29)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances In Physics     Hybrid Journal   (Followers: 20)
Advances in Physics : X     Open Access  
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Remote Sensing     Open Access   (Followers: 44)
AIP Advances     Open Access   (Followers: 9)
AIP Conference Proceedings     Full-text available via subscription   (Followers: 3)
American Journal of Condensed Matter Physics     Open Access   (Followers: 4)
American Journal of Signal Processing     Open Access   (Followers: 11)
Anales (Asociación Física Argentina)     Open Access  
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 5)
Annalen der Physik     Hybrid Journal   (Followers: 5)
Annales Geophysicae (ANGEO)     Open Access   (Followers: 19)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Physica     Open Access  
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 4)
Annals of Physics     Hybrid Journal   (Followers: 4)
Annals of West University of Timisoara - Physics     Open Access   (Followers: 1)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 4)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 10)
Annual Review of Condensed Matter Physics     Full-text available via subscription  
Annual Review of Materials Research     Full-text available via subscription   (Followers: 5)
APL Materials     Open Access   (Followers: 13)
Applied Composite Materials     Hybrid Journal   (Followers: 49)
Applied Physics A     Hybrid Journal   (Followers: 9)
Applied Physics Frontier     Open Access   (Followers: 2)
Applied Physics Letters     Hybrid Journal   (Followers: 35)
Applied Physics Research     Open Access   (Followers: 5)
Applied Physics Reviews     Hybrid Journal   (Followers: 9)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Spectroscopy Reviews     Hybrid Journal   (Followers: 3)
Archive for Rational Mechanics and Analysis     Hybrid Journal  
Asia Pacific Physics Newsletter     Hybrid Journal   (Followers: 1)
ASTRA Proceedings     Open Access   (Followers: 1)
Astronomy & Geophysics     Hybrid Journal   (Followers: 42)
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 22)
Astrophysical Journal Letters     Full-text available via subscription   (Followers: 8)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 10)
Atoms     Open Access   (Followers: 1)
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 13)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Axioms     Open Access   (Followers: 1)
Bangladesh Journal of Medical Physics     Open Access  
Bauphysik     Hybrid Journal   (Followers: 2)
Berkala Fisika Indonesia     Open Access  
Biomaterials     Hybrid Journal   (Followers: 48)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 21)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 37)
Biomedical Imaging and Intervention Journal     Open Access   (Followers: 5)
Biophysical Reviews     Hybrid Journal   (Followers: 1)
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 3)
BMC Biophysics     Open Access   (Followers: 3)
Boson Journal of Modern Physics     Open Access   (Followers: 10)
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Bulletin of Materials Science     Open Access   (Followers: 43)
Bulletin of the Atomic Scientists     Hybrid Journal   (Followers: 4)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Russian Academy of Sciences: Physics     Hybrid Journal   (Followers: 2)
Caderno Brasileiro de Ensino de Física     Open Access  
Canadian Journal of Physics     Hybrid Journal   (Followers: 12)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 11)
Cells     Open Access   (Followers: 2)
CERN courier. International journal of high energy physics     Free   (Followers: 7)
Chemical Physics of Solid Surfaces     Full-text available via subscription  
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 14)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Chinese Journal of Physics     Hybrid Journal  
Chinese Physics B     Full-text available via subscription  
Chinese Physics C     Full-text available via subscription  
Chinese Physics Letters     Full-text available via subscription  
Cogent Physics     Open Access   (Followers: 1)
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Colloid Journal     Hybrid Journal   (Followers: 2)
Communications in Computational Physics     Full-text available via subscription   (Followers: 2)
Communications in Mathematical Physics     Hybrid Journal   (Followers: 2)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Communications in Theoretical Physics     Full-text available via subscription   (Followers: 3)
Communications Physics     Open Access  
Complex Analysis and its Synergies     Open Access   (Followers: 2)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 211)
Composites Part B : Engineering     Hybrid Journal   (Followers: 248)
Computational Astrophysics and Cosmology     Open Access   (Followers: 1)
Computational Condensed Matter     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 22)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 3)
Computational Particle Mechanics     Hybrid Journal   (Followers: 1)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Physics Communications     Hybrid Journal   (Followers: 7)
Condensed Matter     Open Access   (Followers: 1)
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 26)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 8)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 4)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 8)
Cryogenics     Hybrid Journal   (Followers: 53)
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 69)
Diagnostic and Interventional Imaging     Full-text available via subscription  
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamical Properties of Solids     Full-text available via subscription  
East European Journal of Physics     Open Access  
ECS Journal of Solid State Science and Technology     Hybrid Journal   (Followers: 6)
Egyptian Journal of Remote Sensing and Space Science     Open Access   (Followers: 19)
EJNMMI Physics     Open Access  
Electrospinning     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 47)
Energy Procedia     Open Access   (Followers: 2)
Engineering Failure Analysis     Hybrid Journal   (Followers: 67)
Engineering Fracture Mechanics     Hybrid Journal   (Followers: 24)
Environmental Fluid Mechanics     Hybrid Journal   (Followers: 5)
EPJ Nonlinear Biomedical Physics     Open Access  
EPJ Quantum Technology     Open Access  
EPJ Techniques and Instrumentation     Full-text available via subscription  
EPJ Web of Conferences     Open Access   (Followers: 1)
European Journal of Physics     Full-text available via subscription   (Followers: 17)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 16)
European Physical Journal C     Hybrid Journal   (Followers: 1)
Europhysics News     Open Access  
Experimental Mechanics     Hybrid Journal   (Followers: 22)
Experimental Methods in the Physical Sciences     Full-text available via subscription  
Experimental Techniques     Hybrid Journal   (Followers: 56)
Exploration Geophysics     Hybrid Journal   (Followers: 3)
Few-Body Systems     Hybrid Journal  
Fire and Materials     Hybrid Journal   (Followers: 5)
Flexible Services and Manufacturing Journal     Hybrid Journal   (Followers: 1)
Fluctuation and Noise Letters     Hybrid Journal   (Followers: 1)
Fluid Dynamics     Hybrid Journal   (Followers: 14)
Fortschritte der Physik/Progress of Physics     Hybrid Journal  
Frontiers in Physics     Open Access   (Followers: 6)
Frontiers of Materials Science     Hybrid Journal   (Followers: 4)
Frontiers of Physics     Hybrid Journal   (Followers: 2)
Fusion Engineering and Design     Hybrid Journal   (Followers: 10)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 30)
Geografiska Annaler, Series A : Physical Geography     Hybrid Journal   (Followers: 3)
Geophysical Research Letters     Full-text available via subscription   (Followers: 139)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 182)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 4)
Granular Matter     Hybrid Journal   (Followers: 1)
Graphs and Combinatorics     Hybrid Journal   (Followers: 7)
Gravitation and Cosmology     Hybrid Journal   (Followers: 3)
Handbook of Geophysical Exploration: Seismic Exploration     Full-text available via subscription  
Handbook of Metal Physics     Full-text available via subscription  
Handbook of Surface Science     Full-text available via subscription   (Followers: 4)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription   (Followers: 1)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Heat Transfer - Asian Research     Hybrid Journal   (Followers: 12)
High Energy Density Physics     Hybrid Journal   (Followers: 2)
High Pressure Research: An International Journal     Hybrid Journal   (Followers: 3)
IEEE Journal of Quantum Electronics     Hybrid Journal   (Followers: 23)
IEEE Signal Processing Magazine     Full-text available via subscription   (Followers: 77)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
Il Colle di Galileo     Open Access  
Image Analysis & Stereology     Open Access  
Imaging Science Journal     Hybrid Journal   (Followers: 3)
Indian Journal of Biochemistry and Biophysics (IJBB)     Open Access   (Followers: 2)
Indian Journal of Physics     Hybrid Journal   (Followers: 18)
Indian Journal of Pure & Applied Physics (IJPAP)     Open Access   (Followers: 37)
Indian Journal of Radio & Space Physics (IJRSP)     Open Access   (Followers: 47)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 45)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 16)
Infinite Dimensional Analysis, Quantum Probability and Related Topics     Hybrid Journal  
InfraMatics     Open Access  
Infrared Physics & Technology     Hybrid Journal   (Followers: 12)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 12)
Intermetallics     Hybrid Journal   (Followers: 23)
International Applied Mechanics     Hybrid Journal   (Followers: 3)
International Geophysics     Full-text available via subscription   (Followers: 3)
International Heat Treatment and Surface Engineering     Hybrid Journal   (Followers: 4)
International Journal for Computational Methods in Engineering Science and Mechanics     Hybrid Journal   (Followers: 12)
International Journal for Ion Mobility Spectrometry     Hybrid Journal   (Followers: 1)
International Journal for Simulation and Multidisciplinary Design Optimization     Open Access   (Followers: 4)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Aeroacoustics     Hybrid Journal   (Followers: 34)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 5)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 23)
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 6)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Fatigue     Hybrid Journal   (Followers: 38)
International Journal of Fracture     Hybrid Journal   (Followers: 13)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 1)
International Journal of Geophysics     Open Access   (Followers: 4)

        1 2 3 4 | Last

Journal Cover
Colloid Journal
Journal Prestige (SJR): 0.345
Citation Impact (citeScore): 1
Number of Followers: 2  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1608-3067 - ISSN (Online) 1061-933X
Published by Springer-Verlag Homepage  [2350 journals]
  • The Stage of Ultrafast Relaxation in Micellar Surfactant Solutions
    • Authors: L. V. Adzhemyan; T. L. Kim; A. K. Shchekin
      Pages: 243 - 247
      Abstract: The Becker–Döring kinetic equations are employed to describe the stage of ultrafast relaxation in micellar surfactant solutions, which ends in the establishment of a quasi-equilibrium distribution in the premicellar region of aggregate sizes. This is performed by analyzing the spectrum of the eigenvalues of the matrix of kinetic coefficients of the linearized Becker–Döring difference equations, which describes the complete multistage relaxation in a micellar system. The first value of the spectrum ordered as an ascending series is equal to zero (infinite relaxation time), thereby corresponding to the law of conservation of the surfactant quantity. The second value is very small; it differs from the series of subsequent values by several orders of magnitude and determines the time of slow relaxation. The other eigenvalues describe the processes of fast relaxation and comprise the contributions from the relaxation processes in both micellar and premicellar regions of aggregate sizes. In the latter region of the spectrum, the contribution of the ultrafast relaxation can be numerically distinguished. The obtained result is confirmed by the analysis of the spectrum of relaxation times of premicellar aggregates, which are considered as a closed system. It is also shown that the spectrum of ultrafast relaxation times is mainly determined by the first diagonal elements of the matrix of the linearized Becker–Döring equations and can be described analytically.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x1803002x
      Issue No: Vol. 80, No. 3 (2018)
       
  • The Effect of Simulation Cell Size on the Diffusion Coefficient of an
           Ionic Surfactant Aggregate
    • Authors: N. A. Volkov; M. V. Posysoev; A. K. Shchekin
      Pages: 248 - 254
      Abstract: Results of all-atom molecular dynamics simulation have been presented for salt-free aqueous solutions of sodium dodecyl sulfate at its fixed total concentration in a simulation cell containing one to four preliminarily formed quasi-stable ionic aggregates with equal aggregation numbers n = 32. The obtained molecular dynamics trajectories have been used to study the structural and transport properties of the micellar solution. The value of the counterion diffusion coefficient obtained using the Green–Kubo relation has turned out to be somewhat higher than the corresponding value calculated by the Einstein equation. The diffusion coefficients of the aggregates in the systems containing from two to four aggregates have appeared to be higher than the diffusion coefficient of a single aggregate in a cell. The mean force potential obtained for the interaction between the aggregates having aggregation number n = 32 as a function the distance between the aggregate centers of mass has a local minimum in the system containing four such aggregates.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x1803016x
      Issue No: Vol. 80, No. 3 (2018)
       
  • Electrokinetic Characteristics of Porous Glasses in Solutions of Sodium
           and Iron(III) Chlorides
    • Authors: L. E. Ermakova; A. V. Volkova; A. S. Kuznetsova; E. A. Grinkevich; T. V. Antropova
      Pages: 255 - 265
      Abstract: The structural (structural resistance coefficient, bulk porosity, average pore radius, and specific surface area) and electrokinetic (surface conductivity and electrokinetic potential) characteristics of high-silica micro- and macroporous glasses produced from two-phase sodium borosilicate glass have been compared in solutions of an indifferent electrolyte (sodium chloride) and iron(III) chloride containing iron ions, which have a high specificity to silica surfaces. It has been shown that, in the presence of iron ions, the electrokinetic behavior of porous glasses is governed by two factors. First, the superequivalent adsorption of these ions in the Stern layer leads to positive values of the electrokinetic potential, and, second, their mobility in the pore space decreases, thereby resulting in the appearance of equilibrium solution concentration ranges, in which the specific conductivity of a pore solution becomes lower than that of a free solution.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030043
      Issue No: Vol. 80, No. 3 (2018)
       
  • Computer Simulation of Luminophore Solubilization in Reverse Micelles
    • Authors: I. V. Kopanichuk; A. A. Vanin; A. Ostras’; E. N. Brodskaya
      Pages: 266 - 271
      Abstract: The solubilization of ionic (sodium naphthalene-2,6-disulfonate) and nonionic (diethyl 2,5-dihydroxyterephthalate) organic luminophores in water–isooctane–NaАОТ (sodium 1,4-bis[(2-ethylhexyl) oxy]-1,4-dioxybutane-2-sulfonate) reverse micelles is simulated by the molecular dynamics method. In a stationary state, the localization of luminophore molecules in a micelle appears to be the same irrespective of their initial positions in the system. The position and orientation of solubilized luminophores relative to a reverse micelle depend on the hydrophobicity and the capability for dissociation of the functional groups of their molecules, the size of the reverse micelle, and the structure of its electrical double layer.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030067
      Issue No: Vol. 80, No. 3 (2018)
       
  • The Stability of Highly Concentrated Water-in-Oil Emulsions and Structure
           of Highly Porous Polystyrene Produced from Them
    • Authors: M. Yu. Koroleva; V. A. Shcherbakov; L. Kh. Khasanova; A. I. Rakitin; S. A. Shirokikh; E. V. Yurtov
      Pages: 272 - 281
      Abstract: The porosity of polymer materials produced by polymerizing dispersion media of highly concentrated emulsions may be predicted, provided that the emulsions are stable. The study of the stability of water-in-oil (W/O) emulsions containing styrene as a dispersion medium at 25 and 65°C has shown that emulsions with a dispersed phase fraction of 0.75 and sorbitan monooleate concentrations of 1.5–20.0 vol % are stable to coalescence but are unstable to sedimentation. Emulsions with a dispersed phase fraction of 0.95 are stable to both coalescence and sedimentation at sorbitan monooleate concentrations of 10–20 vol %. Open-pore polymer materials are formed from emulsions with dispersed phase fractions of 0.75 and 0.95 at sorbitan monooleate concentrations of 2.0–3.5 and 10–12 vol %, respectively. At a dispersed phase fraction of 0.75 and a sorbitan monooleate concentration of <2 vol %, a multiple O/W/O emulsion is formed, the polymerization of which yields a porous polymer material containing spherical polystyrene particles inside pores. At higher surfactant concentrations in emulsions with dispersed phase fractions of 0.75 and 0.95 partly destroyed porous materials are formed.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030079
      Issue No: Vol. 80, No. 3 (2018)
       
  • Stabilization of Oil-in-Water Emulsions with SiO 2 and Fe 3 O 4
           Nanoparticles
    • Authors: M. Yu. Koroleva; D. A. Bydanov; K. V. Palamarchuk; E. V. Yurtov
      Pages: 282 - 289
      Abstract: Stabilization of oil-in-water Pickering emulsions with SiO2 and Fe3O4 nanoparticles has been studied. Emulsions containing three-dimensional gel networks formed by aggregated nanoparticles in the dispersion media have been shown to be stable with respect to flocculation, coalescence, and creaming. Concentration ranges in which emulsions are kinetically stable have been determined. Stabilization with mixed Ludox HS-30 and Ludox CL SiO2 nanoparticles leads to the formation of stable emulsions at a weight ratio between the nanoparticles equal to 2 and pH 6.7. In the case of stabilization with Ludox CL and Fe3O4 nanoparticles, systems resistant to aggregation and sedimentation are obtained at pH 8. The use of mixed Ludox HS-30 and Fe3O4 nanoparticles has not resulted in the formation of emulsions stable with respect to creaming, with such emulsions appearing to be resistant only to coalescence at pH 2–6.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030080
      Issue No: Vol. 80, No. 3 (2018)
       
  • Diffusion of Alkyltriphenylphosphonium Bromides in Aqueous Micellar
           Solutions
    • Authors: T. G. Movchan; A. I. Rusanov; E. V. Plotnikova; I. V. Soboleva
      Pages: 290 - 297
      Abstract: Dynamic light scattering, conductometry, and capillary viscometry have been used to study aqueous micellar solutions of dodecyl-, tetradecyl-, and hexadecyltriphenylphosphonium bromides in a wide range of concentrations covering the first and second critical micelle concentrations (CMC1 and CMC2). It has been shown that the concentration curves for the diffusion coefficients of the ionic surfactants increase above CMC1 and, then, pass through a maximum. As the alkyl chain length increases, the slopes of the concentration curves within the range of the linear growth in the diffusion coefficient rise, the height of the maximum increases, and its position shifts toward lower concentrations. The obtained results have been explained in terms of a theory previously developed for ideal micellar systems. It has been shown that the mobility factor plays the predominant role in the range of the linear increase in the diffusion coefficient and the effect of the viscosity of a micellar surfactant solution is enhanced with a rise in its concentration.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030109
      Issue No: Vol. 80, No. 3 (2018)
       
  • On the Problem of the Relationship between the Contact Angle and Surface
           Roughness Coefficient: Quartz Wettability with Melted Germanium
    • Authors: V. M. Samsonov; I. A. Kaplunov; A. M. Ivanov; I. V. Talyzin; S. A. Tretyakov
      Pages: 298 - 305
      Abstract: Equilibrium contact angles of melted geranium have been measured at fused quartz surfaces. The surfaces were preliminarily grinded, polished, and, in some cases, etched. Then, the roughness coefficients are determined for the relief profile and the surface itself by optical interferometry using a NanoMap 1000 WLI profilometer. The contact angle has been found to vary in a range of 147°–164° depending on the method of surface pretreatment. The measured values of the contact angles agree with the data of other researchers. At the same time, the analysis of the obtained data has led to the conclusion that Wenzel’s equation, which relates the contact angles at smooth and rough surfaces, is not valid for germanium droplets on quartz surface.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030110
      Issue No: Vol. 80, No. 3 (2018)
       
  • Modification of Epoxy and Amine Oligomers with Oligohexamethyleneguanidine
           Fatty-Acid Salts
    • Authors: I. N. Senchikhin; E. S. Zhavoronok; A. V. Matveev; O. Ya. Uryupina; V. I. Roldughin
      Pages: 306 - 311
      Abstract: Oligohexamet diglycidyl ether hyleneguanidine (OHMG) stearates and palmitates, which have a higher solubility in epoxy oligomers (EOs) (glycidyl ethers of diphenylolpropane, Epikote 828, and polyglycidyle ether of oligooxypropilene oligooxypropylene polyol, Laproksid 703) than the widely used OHMG hydrochloride has, have been synthesized and characterized. Probably due to the better solubility, pronounced chemical interaction between EOs and OHMG fatty-acid salts occurs to yield adducts of EOs and OHMG, which are completely compatible with an initial EO. It has been proposed to incorporate OHMG fatty-acid salts into epoxy-amine networks via the preliminary synthesis of EO–OHMG adducts.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030122
      Issue No: Vol. 80, No. 3 (2018)
       
  • The Effect of Molecular Architecture of Sulfobutyl Ether β-Cyclodextrin
           Nanoparticles on Physicochemical Properties of Complexes with Moxifloxacin
           
    • Authors: A. A. Skuredina; I. M. Le-Deygen; E. V. Kudryashova
      Pages: 312 - 319
      Abstract: A method has been developed for nanoparticles synthesis based on oligomers of sulfobutyl ether β-cyclodextrin (SBE-β-CD) and their structure has been studied by FTIR spectroscopy. The physicochemical properties of “guest−host” inclusion complexes formed by SBE-β-CD and its oligomers with moxifloxacin have been investigated. It has been shown that, as compared with SBE-β-CD, the synthesized oligomers have an increased affinity for moxifloxacin: the dissociation constants for the complexes of monomeric and oligomeric SBE-β-CD are (1.0 ± 0.3) × 10−4 and nearly 5 × 10−6 M, respectively. The binding efficiency increases due to the multy-point interaction of a moxifloxacin molecule with functional groups of the oligomeric carrier. SBE-β-CD oligomers are promising carriers for drugs, in particular, fluoroquinolone-based antibacterial agents, and may be used for the development of new compositions with improved solubility, bioavailability, and prolonged drug release.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030134
      Issue No: Vol. 80, No. 3 (2018)
       
  • The Stability of Detonation Nanodiamond Hydrosols in the Presence of Salts
           and Surfactants
    • Authors: O. A. Soboleva
      Pages: 320 - 325
      Abstract: The regions of stability and coagulation of hydrosols of oxidized detonation nanodiamonds in the presence of inorganic salts and surfactants of different types have been determined. Concentration Cc of inorganic salts corresponding to the onset of the growth of aggregates in a hydrosol dramatically decreases with an increase in coagulating ion charge z: Cc ~ z−5.3. Anionic and nonionic surfactants stabilize dispersions of nanodiamonds, while additives of cationic and zwitterionic surfactants cause coagulation. The study of the coagulating effect of alkylpyridinium chlorides has shown that the coagulation threshold halves upon elongation of the hydrocarbon chain in a surfactant molecule by a СН2 group.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030146
      Issue No: Vol. 80, No. 3 (2018)
       
  • Asymmetry of Hydrogen Transfer through a Composite Membrane
    • Authors: V. V. Ugrozov
      Pages: 326 - 330
      Abstract: Hydrogen mass transfer through a composite membrane represented by a film of palladium (or its alloys) applied onto a porous substrate has been studied. The hydrogen flux through the composite membrane has been shown to be governed by the ratio between the diffusion permeabilities of the film and the porous substrate, the mechanism of the transfer through the film, and the external pressure. It has been found that the intensity of hydrogen transfer through the composite membrane may depend on the transfer direction. The transfer is most asymmetric when the diffusion permeabilities of both layers are close and the hydrogen transfer in the film is limited by diffusion. At the same time, the transfer asymmetry effect does not arise when the hydrogen transfer in the film is limited by adsorption processes on its surface.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030158
      Issue No: Vol. 80, No. 3 (2018)
       
  • Pressure Drop and Aerosol-Particle-Collection Efficiency of Polydisperse
           Fibrous Filters
    • Authors: A. L. Chernyakov; A. A. Kirsh
      Pages: 331 - 338
      Abstract: The effect of the polydispersity of fibrous materials on the viscous drag and the efficiency of gas filtration has been studied. The dependence of the Brinkman constant on parameter βg, which characterizes the variance of the lognormal function of fiber-length distribution over fiber radii, has been calculated for equations describing the hydrodynamics of a gas in a porous medium. The dependences of the effective aerosol- particle-collection efficiency on the packing density, dispersion of fiber-size scatter, and average fiber radius have been investigated. Quality parameters of filters with different degrees of polydispersity have been compared. Results of calculations have been compared with experimental data.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030031
      Issue No: Vol. 80, No. 3 (2018)
       
  • Modeling the Effect of the Relative Humidity on the Manipulation of
           Nanoparticles with an Atomic Force Microscope
    • Authors: Li Yang; Kezhao Bai; Yunqian Li
      Pages: 339 - 345
      Abstract: In the manipulation of nanoparticles, different behaviors are typically observed including sliding, rolling and rotation. Most of investigations in this field have so far focused on describing the interaction forces under vacuum (dry air) environmental condition, while the effect of the relative humidity has been poorly considered. In this work we developed a model for simulating the dynamic nanoparticle motion (rolling and sliding) in an AFM-based manipulation of nanoparticles in a humid environment. In our method, the interaction forces include the adhesion force, mainly consisting of the capillary force and van der Waals force, the normal force and friction forces. We calculated the adhesion force by considering the contributions from the wet and dry portions of the particle. Our stimulations show that nanoparticles smaller than the AFM tip tend to slide before rolling, while in large nanoparticles the rolling occurs first. The particle motion is achieved if the applied force exceeds a critical value and the direction of the rolling movement depends on the applied force angle. Furthermore, small nanoparticles are more easily manipulated by the tip in low-humidity conditions while the manipulations with large nanoparticles need high-humidity conditions. Preliminary results can be used to adjust proper handling force for the accurate and successful assembly of particles.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030092
      Issue No: Vol. 80, No. 3 (2018)
       
  • Templateless Synthesis of Organosilica Nanotoroids and Creation of
           Core/Shell Plasmonic Structures Thereon
    • Authors: M. E. Kartseva; O. V. Dement’eva; A. V. Zaitseva; V. M. Rudoy
      Pages: 346 - 348
      Abstract: It has been shown for the first time that nanosized organosilica toroids can be formed via hydrolytic condensation of (γ-mercaptopropyl)trimethoxysilane in an alkaline medium. It has been found that such toroids may be used as “nuclei” for the synthesis of plasmonic composite nanoparticles with a core/shell structure.
      PubDate: 2018-05-01
      DOI: 10.1134/s1061933x18030055
      Issue No: Vol. 80, No. 3 (2018)
       
  • Tween 85 Oil-in-Water Nanoemulsions with Incorporated Chlorhexidine Base
    • Authors: N. M. Zadymova; M. Tao; M. V. Poteshnova
      Pages: 158 - 166
      Abstract: The properties of oil-in-water nanoemulsions (NEs) that are stable for a long time (more than a month), which contain a non-micelle-forming surfactant, Tween 85 (Tw, polyoxyethylene(20) sorbitan trioleate), as a dispersed phase, with and without incorporated chlorhexidine (CH) base, have been studied by dynamic light scattering, UV spectroscopy, and potentiometry. It has been shown that the concentration of the dispersed phase in a range of 1–5 wt % has almost no effect on the differential curves of the particle-size distribution, electrokinetic potential of the particles, and dispersion-medium pH values. A linear dependence of the solubility (solubilization) of chlorhexidine base on Tw concentration has been found. The solubilization capacity of the NEs with respect to CH has been determined. The occurrence of intense mass transfer of CH with NE particles in an aqueous medium and the antimicrobial activity with respect to Staphylococcus aureus bacterium, which is resistant to some antibiotics, in particular, to methicillin, has been confirmed.
      PubDate: 2018-03-01
      DOI: 10.1134/s1061933x18020138
      Issue No: Vol. 80, No. 2 (2018)
       
  • The Dipole Moment of Reverse Micelles according to Computer Simulation
           Data
    • Authors: I. V. Kopanichuk; A. A. Vanin; E. N. Brodskaya
      Pages: 184 - 188
      Abstract: Sodium 1,4-bis[(2-ethylhexyl)oxy]-1,4-dioxybutane-2-sulfonate (Aerosol OT) reverse micelles in isooctane have been simulated, and the mean-square dipole moment has been calculated. The formed isolated micelles have been classified according to aggregate radius and surface area per one surfactant molecule. It has been shown that, for micelles with a constant surface density of surfactant anion charges, the meansquare dipole moment rises with the aggregate size faster than the squared radius does. Dipole moment values obtained within the atomistic model for a reverse micelle are much higher than the values presented in the literature for the primitive model.
      PubDate: 2018-03-01
      DOI: 10.1134/s1061933x18020059
      Issue No: Vol. 80, No. 2 (2018)
       
  • Electrophoretic Mobility of a Polyelectrolyte Capsule
    • Authors: V. I. Roldughin; A. N. Filippov; T. V. Kharitonova
      Pages: 189 - 198
      Abstract: The electrophoretic motion of a polyelectrolyte capsule has been considered in a uniform electric field. The capsule carries a uniformly distributed charge and is permeable to ions of different natures. An electrolyte identical to a dispersion medium is located inside the capsule. The flow in the porous layer of the capsule has been described by the Brinkman equations taking into account the effect of electrostatic forces. The distribution of ions in the vicinity of the capsule has been determined, and its electrophoretic mobility has been found in a linear approximation. The mobility of the capsule has been studied as depending on its geometric characteristics, permeability, and charge density. In particular, a complex extremal character of variations in the mobility as depending on the solid phase fraction in the capsule has been revealed at different ratios between the thicknesses of the electrical double layer and the Brinkman filtration layer.
      PubDate: 2018-03-01
      DOI: 10.1134/s1061933x18020060
      Issue No: Vol. 80, No. 2 (2018)
       
  • Mathematical Simulation of Gas Transfer through a Bilayer Membrane with
           Account for Adsorption Kinetics
    • Authors: V. V. Ugrozov
      Pages: 207 - 213
      Abstract: Mathematical simulation has been employed to study the permeability of a bilayer membrane taking into account finite rates of adsorption on the external surfaces of the membrane and internal diffusion in it. Analytical expressions are derived for transmembrane gas flux and permeability of the membrane. It has been revealed that the permeability may depend on the direction of gas flux (asymmetry effect). It has been shown that the asymmetry effect arises at different values of the parameters of the isotherms of gas sorption in membrane layers at a finite gas pressure. The main characteristics that govern the degree of asymmetry have been determined and analyzed. The rate of adsorption has been found to substantially influence the magnitude of the asymmetry effect in the bilayer membrane. It has been found that a two-layer membrane can function as a diffusion "diode", if adsorption is the limiting stage of gas transfer.
      PubDate: 2018-03-01
      DOI: 10.1134/s1061933x18020114
      Issue No: Vol. 80, No. 2 (2018)
       
  • The Effect of Temperature on Nucleation of Condensed Water Phase on the
           Surface of a β-AgI Crystal. 1. Structure
    • Authors: S. V. Shevkunov
      Pages: 214 - 228
      Abstract: The Monte Carlo method has been employed to study the effect of temperature on the structure and the mechanism of retaining condensed water phase nuclei on the surface of the basal face of a silver iodide crystal. Comparative calculations of spatial correlation functions and computer images of vapors being condensed at 260 and 320 K have indicated an increased stability of monomolecular water-film spots with respect to thermal fluctuations. The disturbances of the regular “honeycomb” structure have a collective character and occur according to the “domino principle”; i.e., the rupture of a hydrogen bond between neighboring molecules releases enhanced libration motions of the latter, which, in turn, provoke the rupture of bonds with other neighbors. In accordance with this scenario, the distortion of the hexagonal structure of the film under the action of thermal fluctuations develops with the formation of growing spots of destruction. The thermal fluctuations significantly affect the orientational molecular order and the degree of clustering on the surface. The positions of molecules relative to the ions of the surface crystallographic layer of a substrate weakly depend on temperature.
      PubDate: 2018-03-01
      DOI: 10.1134/s1061933x18020096
      Issue No: Vol. 80, No. 2 (2018)
       
 
 
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