排序方式: 共有11条查询结果,搜索用时 15 毫秒
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Kuklin A. I. Ivankov O. I. Rogachev A. V. Soloviov D. V. Islamov A. Kh. Skoi V. V. Kovalev Yu. S. Vlasov A. V. Ryzhykau Yu. L. Soloviev A. G. Kucerka N. Gordeliy V. I. 《Crystallography Reports》2021,66(2):231-241
Crystallography Reports - Neutron diffraction studies on the small-angle neutron spectrometer YuMO (Joint Institute for Nuclear Research, Dubna), based on the IBR-2 pulsed reactor, have been... 相似文献
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A. I. Kuklin A. D. Rogov Yu. E. Gorshkova P. K. Utrobin Yu. S. Kovalev A. V. Rogachev O. I. Ivankov S. A. Kutuzov D. V. Soloviov V. I. Gordeliy 《Physics of Particles and Nuclei Letters》2011,8(2):119-128
The results of experimental and computer-modeling investigations of neutron spectra and fluxes obtained with cold and thermal
moderators at the IBR-2 reactor (Joint Institute for Nuclear Research (JINR), Dubna) are presented. These studies are for
the YuMO small-angle neutron scattering (SANS) spectrometer (IBR-2 beamline 4). The neutron spectra have been measured for
two methane cold moderators for the standard configuration of the SANS instrument. The data from both moderators under different
conditions of their operation are compared. The ratio of experimentally determined neutron fluxes of cold and thermal moderators
is shown at different wavelengths. Monte Carlo simulations have been carried out to determine the spectra for cold-methane
and thermal moderators. The results of calculations of the ratio of neutron fluxes of cold and thermal moderators at different
wavelengths are demonstrated. In addition, the absorption of neutrons in the air gaps on the way from the moderator to the
investigated sample is presented. SANS with the protein apoferritin was done with both cold methane and a thermal moderator
and the data were compared. The prospects for the use of a cold moderator for a SANS spectrometer at IBR-2 are discussed.
The advantages of using the YuMO spectrometer with a thermal moderator with respect to the tested cold moderator are shown. 相似文献
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Erratum to: Small-Angle Neutron Scattering at the Pulsed Reactor IBR-2: Current Status and Prospects
Kuklin A. I. Ivankov O. I. Rogachev A. V. Soloviov D. V. Islamov A. Kh. Skoi V. V. Kovalev Yu. S. Vlasov A. V. Ryzhykau Yu. L. Soloviev A. G. Kucerka N. Gordeliy V. I. 《Crystallography Reports》2022,67(7):1304-1304
Crystallography Reports - An Erratum to this paper has been published: https://doi.org/10.1134/S1063774522070513 相似文献
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L.A. Bulavin D.V. Soloviov V.I. Gordeliy O.S. Svechnikova A.O. Krasnikova N.A. Kasian 《Phase Transitions》2015,88(6):582-592
Multibilayer structures of hydrated phospholipids, often considered as model biological membranes, are, from the physical viewpoint, lyotropic liquid crystalline systems undergoing temperature-induced mesomorphic phase transitions. Effects of silver nitrate and urocanic acid on lyotropic phase states of hydrated L-α-dipalmitoylphosphatidylcholine (DPPC) have been studied by small-angle X-ray scattering and differential scanning calorimetry (DSC). Both methods show increase of the main phase-transition temperature (Tm) of hydrated DPPC upon introduction of AgNO3 or urocanic acid, decrease of pre-transition temperature (Tp) in the presence of urocanic acid and its increase in the presence of AgNO3. Thus, urocanic acid widened the ripple-phase temperature region. Silver nitrate caused the appearance of an additional high-temperature peak on DSC thermograms, evidencing phase separation in the system. Both agents caused minor effects on DPPC lipid bilayer repeat distance (D) in gel phase, but resulted in noticeable increase of D in the liquid crystal phase with temperature as compared to undoped DPPC structures. 相似文献
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Dr. Maksym Soloviov Akshaya K. Das Prof. Markus Meuwly 《Angewandte Chemie (International ed. in English)》2016,55(34):10126-10130
Nitric oxide binding and unbinding from myoglobin (Mb) is central to the function of the protein. By using reactive molecular dynamics (MD) simulations, the dynamics following NO dissociation were characterized in both time and space. Ligand rebinding can be described by two processes on the 10 ps and 100 ps timescale, which agrees with recent optical and X‐ray absorption experiments. Explicitly including the iron out‐of‐plane (Fe‐oop) coordinate is essential for a meaningful interpretation of the data. The proposed existence of an “Fe‐oop/NO‐bound” state is confirmed and assigned to NO at a distance of approximately 3 Å away from the iron atom. However, calculated XANES spectra suggest that it is diffcult to distinguish between NO close to the heme‐Fe and positions further away in the primary site. Another elusive state, with Fe?ON coordination, was not observed experimentally because it is masked by the energetically more favorable but dissociative 4A state in this region, which makes the Fe?ON local minimum unobservable in wild‐type Mb. However, suitable active‐site mutations may stabilize this state. 相似文献
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Vladimir Soloviov 《Analysis Mathematica》1993,19(4):297-315
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The micellization in mixed aqueous systems based on a nonionic surfactant, heptaethylene glycol monotetradecyl ether (C14E7), and an anionic surfactant, cesium dodecyl sulfate, has been investigated by small-angle neutron scattering. Preliminary data on the behavior of the C14E7 aqueous solutions (with three concentrations, 0.17, 0.5, and 1%) mixed with a small amount of anionic surfactant, cesium dodecyl sulfate, are reported. 相似文献