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  • 1.
    Arkhipov, Victor P.
    et al.
    Kazan National Research Technological University.
    Bogdanova, Svetlana A.
    Kazan National Research Technological University.
    Idiyatullin, Zhamil Sh.
    Kazan National Research Technological University.
    Lunev, Ivan V.
    Institute of Physics, Kazan (Volga Region) Federal University.
    Filippov, Andrei
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
    Dynamic and structural properties of oxyethylated isononylphenols2016In: Mendeleev communications (Print), ISSN 0959-9436, E-ISSN 1364-551X, Vol. 26, no 4, p. 355-357Article in journal (Refereed)
    Abstract [en]

    Diffusion coefficients, dielectric relaxation times and refraction coefficients were measured, and activation energies of translational and rotational mobilities were determined for a series of oxyethylated phenols (neonols AF9-n) p-C9H19C6H4-O(CH2CH2O)nH, n = 4, 6, 8, 9, 10, 12, at different temperatures. The results demonstrated the existence of contraction and transition phenomena that changed the structure of neonol molecules at n ∼ 9 from a zigzag to a meander form.

  • 2.
    Arkhipov, Victor P.
    et al.
    Kazan National Research Technological University.
    Idiyatullin, Zamil Sh.
    Kazan National Research Technological University.
    Gnezdilov, Oleg I.
    Institute of Physics, Kazan (Volga Region) Federal University.
    Petrova, Ekaterina V.
    Kazan National Research Technological University.
    Filippov, Andrei
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
    Antzutkin, Oleg
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
    Molecular self-diffusion and micellar structure in the aqueous solutions of AF9-10 ethoxylated isononylphenol near a cloud point2014In: Mendeleev communications (Print), ISSN 0959-9436, E-ISSN 1364-551X, Vol. 24, no 5, p. 266-268Article in journal (Refereed)
    Abstract [en]

    Sizes of micelles and compositions of aggregates in the aqueous solutions of the nonionic surfactant oxyethylated monoalkyl phenol (neonol AF9-10) were determined by NMR spectroscopy, NMR diffusometry and dynamic light scattering in a wide range of tem- peratures near the cloud point. The cloud point extraction of phenol from aqueous solutions by the surfactant AF9-10 was performed.

  • 3.
    Dvoyashkin, Dvoyashkin
    et al.
    aculty of Oil and Gas, Almetyevsk State Oil Institute.
    Filippov, Andrei
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
    Diffusivity of crude oils contained in macroporous medium: 1H NMR study2018In: Mendeleev communications (Print), ISSN 0959-9436, E-ISSN 1364-551X, Vol. 2, p. 222-224Article in journal (Refereed)
    Abstract [en]

    Diffusivity of crude oils confined in pores of sand decreased with raising the fraction of oil at ordinary temperatures. This behaviour is suggested to be caused by adsorption of the high-molecular fractions of oils at the solid–liquid interface.

  • 4.
    Filippov, Andrei
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Antzutkin, Oleg
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Influence of Alzheimer´s beta-amyloid peptide on the lateral diffusion of lipids in raft-forming bilayers2013In: Mendeleev communications (Print), ISSN 0959-9436, E-ISSN 1364-551X, Vol. 23, no 6, p. 316-318Article in journal (Refereed)
    Abstract [en]

    For the first time effect of added Alzheimer´s Abeta(1-40) peptide of wild type on lateral diffusion of lipids in macroscopically oriented bilayers of “raft” compositions (mixture of dioleoylphosphatidylcholine (DOPC), sphingomielin (SM) and cholesterol (CHOL)) was studied by NMR-diffusion technique. In homogeneous bilayers diffusion coefficients decrease, while in liquid ordered and in liquid disordered phases they change differently at varied concentrations of CHOL that was explained by decreased maximum solubility of CHOL in phospholipids in the presence of Abeta(1-40) peptide.

  • 5.
    Filippov, Andrei
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Khakimov, Aidar
    Kazan (Volga Region) Federal University, Kazan.
    Afonin, Sergii
    Karlsruhe Institute of Technology.
    Antzutkin, Oleg
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Interaction of prostatic acid phosphatase fragments with a lipid bilayer as studied by NMR spectroscopy2013In: Mendeleev communications (Print), ISSN 0959-9436, E-ISSN 1364-551X, Vol. 23, no 6, p. 313-315Article in journal (Refereed)
    Abstract [en]

    Effects of five fragments of prostatic acid phosphatase on the dimyiristoylphosphatidilcholine lipid multi-lamellar liposomes were studied by 2H and 31P NMR spectroscopy and on planar supported multi-bilayers of the same lipid by 1H and 31P NMR spectroscopy. It was found that hydrophobic interaction is dominated factor of the peptide–membrane binding, while short alpha-helical fragments PAP(262-270) and PAP(262-272) strongly interact to membrane at the interface, generally following to the Gibbs free energy of water-to-interface insertion.

  • 6.
    Filippov, Andrei
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
    Kotenkov, Sergey A.
    Kazan (Volga Region) Federal University, Kazan, Institute of Physics, Kazan (Volga Region) Federal University.
    Munavirov, Bulat
    Kazan (Volga Region) Federal University, Kazan, Institute of Physics, Kazan (Volga Region) Federal University.
    Khaliulina, Aliya V.
    Institute of Physics, Kazan (Volga Region) Federal University.
    Gnezdilov, Oleg I.
    Kazan (Volga Region) Federal University, Kazan, Institute of Physics, Kazan (Volga Region) Federal University.
    Antzutkin, Oleg
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
    Effect of curcumin on lateral diffusion in lipid bilayers2016In: Mendeleev communications (Print), ISSN 0959-9436, E-ISSN 1364-551X, Vol. 26, no 2, p. 109-110Article in journal (Refereed)
    Abstract [en]

    Lateral diffusion in dimyristoylphosphatidylcholine lipid bilayers decreases in the presence of cholesterol and curcumin, as measured by 1H NMR spectroscopy, but the mechanisms of action of these two compounds are different.

  • 7.
    Filippov, Andrei
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Munavirov, Bulat
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Antzutkin, Oleg
    Institute of Physics, Kazan (Volga Region) Federal University.
    Phase transition, ordering and lateral diffusion in phospholipid bilayers in the presence of poly(ethylene oxide)2012In: Mendeleev communications (Print), ISSN 0959-9436, E-ISSN 1364-551X, Vol. 22, no 5, p. 250-251Article in journal (Refereed)
    Abstract [en]

    The thermal behaviour, molecular orientation and lateral diffusion in the bilayered systems of dimyristoylphosphatidylcholine (DMPC) in the presence of poly(ethylene oxide) (PEO) were studied by NMR and DSC techniques, and it was found that PEO decreases the melting temperature (of vesicles and flat multibilayers) and affects the degree of orientation of DMPC molecules relative to the bilayer normal, but it does not influence the lateral diffusion of DMPC molecules

1 - 7 of 7
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