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Magnetic susceptibility of Al_2RE compounds in crystal and liquid states

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Journal of Rare Earths 2011年第8期29卷 768-771页

作者： N.S. Uporova S.A. Uporov v.E. sidorov Ural State Pedagogical University

Magnetic susceptibility of Al2RE （RE=Y, Ce, Sm, Gd, Dy, Ho, Yb） compounds was studied experimentally in wide temperature （T=290–2000 K） and field （B=0.3–1.3 T） intervals. The abnormal increase in susceptibility beginning above the melting point was fixed for all the compositions. The values for the effective magnetic moments per RE atoms in these compounds were found to be smaller than the values typical for free ions RE3＋. The results were discussed in supposition of the directed bonds between aluminum and rare-earth atoms.

关键词： Al2RE intermetallic compounds magnetic susceptibility rare earths

Tensor force impact on shell evolution in neutron-rich Si and Ni isotopes

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Chinese Physics C 2024年第4期48卷 95-106页

作者： S.v.sidorov A.S.Kornilova T.Yu.Tretyakova Faculty of Physics Lomonosov Moscow State UniversityMoscow 119991Russia Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State UniversityMoscow 119991Russia

The influence of the tensor interaction of nucleons on the characteristics of neutron-rich silicon and nickel isotopes was studied in this *** forces are considered within the framework of the Hartree-Fock approach with the Skyrme *** addition of a tensor component of interaction is shown to improve the description of the splittings between different single-particle states and decrease nucleon-nucleon pairing correlations in silicon and nickel *** attention was directed toward the role of isovector tensor forces relevant to the interaction of like nucleons.

关键词： nuclear shell model tensor interaction silicon isotopes nickel isotopes

Empirical pairing gaps and neutron-proton correlations

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Chinese Physics C 2019年第1期43卷 109-121页

作者： B.S.Ishkhanov S.v.sidorov T.Yu.Tretyakova E.v.vladimirova Faculty of Physics Lomonosov Moscow State University Skobeltzyn Institute of Nuclear Physics Lomonosov Moscow State University

Analysis of various mass formulas related to neutron-proton correlations in atomic nuclei is carried *** the example of the N =Z chain it is shown that for self-adjoint nuclei various formulas proposed in literature for estimating the np pairing energy lead to similar results. Significant differences between the calculation methods arise when nuclei with N = Z are considered, which allows to reveal the complexity of neutron-proton correlations in different types of atomic nuclei and to make assumptions on the correspondence of the mass relation to the real effect of np pairing. The Shell Model parametrization of the binding energy makes it possible to draw additional conclusions on the structure of mass formulas and their relationship.

关键词： nucleon interaction models of atomic nuclei nucleon pairing in atomic nuclei

Mass differences and neutron pairing in Ca, Sn and Pb isotopes

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Chinese Physics C 2017年第9期41卷 83-89页

作者： B. S. Ishkhanov S. v. sidorov T. Yu. Tretyakova E. v. vladimirova Faculty of Physics M.V. Lomonosov Moscow State University Moscow 119991 Russia Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow 119991 Russia

Abstract： various estimates of the even-odd effect of the mass shell of atomic nuclei are considered. Based on the experimental mass values of the Ca, Sn, and Pb isotopes, the dependence of the energy gap on the neutron number is traced and the relationship of this characteristic to the properties of external neutron subshells is shown. In nuclei with closed proton shells, effects directly related to neutron pairing and effects of nucleon shells are discussed.

关键词： nucleon interaction models of atomic nuclei nucleon pairing in atomic nuclei

Seniority and (9/2)^(n) configurations in neutron-rich Nickel isotopes

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Chinese Physics C 2022年第7期46卷 103-111页

作者： S.sidorov D.Zhulyaeva T.Tretyakova Faculty of Physics Lomonosov Moscow State UniversityMoscow 119991Rusia Skobeltsyn Institute of Nuelear Physicso Moscow State University Moscow 119991Rssia

Excited states in low-energy spectra of ^(70-76) Ni are considered. Accordingly, pairing forces in the form of surface delta interaction are employed to account for the formation of the ground state multiplet with seniority v= 2 states. The multiplet splitting is described with mass relationships of masses of neighboring nuclei. Subsequently, the seniority model is adopted to reproduce or predict the states v= 3 in odd-even isotopes and v= 4 in even-even isotopes. The correct account of the 2^(+)_(1) state should allow for the description of the reversed order of J = 4 states with v= 2 and v= 4 observed in experiments. The results obtained are compared with the structure of similar multiplets in N=50 isotones.

关键词： shell model nucleon pairing seniority scheme neutron-rich isotopes

Detection of angiospastic disorders in the microcirculatory bed using laser diagnostics technologies

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Journal of Innovative Optical Health Sciences 2018年第1期11卷 65-79页

作者： Irina N.Makovik Andrey v.Dunaev victor v.Dremin Alexander I.Krupatkin viktor v.sidorov Lyudmila S.Khakhicheva vadim F.Muradyan Olga v.Pilipenko Ilya E.Rafailov Karina S.Litvinova Biomedical Photonics Instrumentation Group Scientic-Educational Centre of"Biomedical Engineering"Orel State University named after I.S.Turgenev Orel 302026 Russian Federation Priorov Central Research Institute of Traumatology and Orthopaedics Moscow 127299 Russian Federation SPE"LAZMA"Ltd Moscow 125252Russian Federation Orel Regional Clinical Hospital Orel 302028 Russian Federation School of Engineering and Applied Sciences Aston Institute of Photonic Technologies Aston University BirminghamB47ETUK Optoelectronics and Biomedical Photonics Group Aston Institute of Photonic Technologies Aston University BirminghamB47ETUK Aston Medical School Aston University BirminghamB47ETUK

The evaluation of the microcirculatory bed functional state and the identification of angiospastic disorders with related complications,when the pathological changes are reversible,have an important role in medical *** aim of this study was to evaluate the possibility of using optical noninvasive methods and the cold pressor test to solve this problem.A total of 33 patients with rheumatological diseases and 32 healthy volunteers were included in the *** Doppler flowmetry,tissue reflectance oximetry and pulse oximetry were used as optical noninvasive *** parameters were recorded before,immediately after and 20 min after the cold pressor *** on the measured parameters,the complex parameters of the microcirculatory bed were calculated.A detailed statistical analysis of the parameter changes for each individual in the two groups displayed diverse microcirculatory bed parameter responses upon cold exposure,with differing recovery of parameters after *** diagnostic criteria were proposed for the identification of angiospastic *** to the proposed criteria,27 people of the volunteers group were confirmed to not display any *** the patient group,however,18 people were observed to have a relatively normal functional state of the microcirculatory bed,while 15 people were observed to have a possible tendency to *** highlight the diferences between a relatively normal state and presence of angiospastic disorders,statistical analysis of experimental data was carried out,which revealed significant *** analysis of data with angiospastic disorders identified a relationship between their diagnoses and the results of labo-ratory ***,the evaluation of combined noninvasive optical diagnostic method use,the cold pressor test and proposed diagnostic criteria showed a positive *** approach can be used to detect the presence of possible angiospastic disorders and related complications,as

关键词： Noninvasive diagnostics laser Doppler flowmetry tissue relctance oximetry pulse oximetry cold pressor test microcirculatory bed angiospasm

Influence of Fast Global variations of Solar Magnetic Fields on Space Weather in Cycle 23

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空间科学学报 2005年第5期25卷 460-467页

作者： S. I. Molodykh G. A. Zherebtsov v. A. Kovalenko J. X. Wang v. I. sidorov Institute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 Russia National Astronomical Observatory Chinese Academy of Sciences

It is established that the large-scale and global magnetic fields in the Sun's atmosphere do not change smoothly, and long-lasting periods of gradual variations are superseded by fast structural changes of the global magnetic field. Periods of fast global changes on the Sun are accompanied by anomalous manifestations in the interplanetary space and in the geomagnetic field. There is a regular recurrence of these periods in each cycle of solar activity, and the periods are characterized by enhanced flaring activity that reflects fast changes in magnetic structures. Is demonstrated, that the fast changes have essential influencing on a condition of space weather, as most strong geophysical disturbances are connected to sporadic phenomena on the Sun. An explanation has been offered for the origin of anomalous geomagnetic disturbances that are unidentifiable in traditionally used solar activity indices. Is shown, main physical mechanism that leads to fast variations of the magnetic fields in the Sun's atmosphere is the reconnection process.

关键词：太阳活动磁场空间气候大气动态变化太阳光

Liver regeneration is associated with lipid reorganization in membranes of the endoplasmic reticulum

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Frontiers in Biology 2016年第5期11卷 396-403页

作者： Anatoly I. Bozhkov Natalia G. Menzyanova vadim v. Davydov Natalia I. Kurguzova vadim I. sidorov Anastasia S. vasilieva Research Institute of Biology of v.N. Karazin Kharkov National University sq. Svobody 4 61022 Kharkov Ukraine Institute of Fundamental Biology and Biotechnology of Siberian Federal University pr. Svobodny 79 660041 Krasnoyarsk Russia Ryazan State Medical University named after academician I.P.. Pavlov Visokovoltnaya 9 390026 Ryazan Russia

BACKGROUND： In recent years, an adaptive endoplasmic reticulum （ER） stress response has been actively investigated. The ER membrane, isolated from the intact and regenerating liver, may be an appropriate model for investigating the association between structural and functional characteristics of ER in vivo and their corresponding behavioral characteristics in vitro. The rate of lipid synthesis and that of intracellular lipid exchange between the ER and cytosol were investigated in the intact and regenerating liver （13 h after partial hepatectomy）. Particularly, membrane characteristics, surface potential, and glucose 6- phosphatase （G6Pase） activity were investigated, along with the degradation rate of G6Pase in vitro, which was estimated by the loss of G6Pase activity, formation of lipid peroxides, and size of excreted membrane vesicles. METHODS： The rate of lipid synthesis was determined by measuring the intensity of radioactive precursor （C^14-sodium acetate） in different fractions of lipids （phospholipids, non-esterified fatty acids, and triacylglycerides） after 30 min exposure. The rate of lipid metabolism was assessed by measuring the quantity oflipids with radioactive labels emerging in the cytosol of hepatocytes （CPM）. viscosity and surface potential were determined by fluorescent probes. RESULTS： It was observed that after 13 h of partial hepatectomy, the rate of lipid synthesis in the ER of hepatocytes in the regenerating liver was 3 times lower than that in ER ofhepatocytes in the intact liver, wherein the rate of incorporation of newly synthesized lipids in cytosol was several times higher in the regenerating liver. Increase in the rate of exchange of neutral lipids in cells of the regenerating liver was accompanied by lipid reconstruction in the ER, changing the structural and functional characteristics of the membrane. Such membrane rebuilding also contributed to the rate of degradation of the ER in vitro, which that must be taken into account during d

关键词： regeneration neutral lipids microsomes in vitro

Laser Сonoscopiс Research Technique For Single Crystals LiNbO<sub>3</sub>: Mg

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Journal of Modern Physics 2013年第5期4卷 12-17页

作者： O. Y. Pikoul N. v. sidorov M. N. Palatnikov O. v. Makarova Far Eastern State University of Transportation Khabarovsk Russia Tananayev Institute of Chemistry and Technology of Rare Elementsand Mineral Raw Materials Apatity Russia

Optical homogeneity and subtle features of structural distortions in a series of single crystals of lithium niobate (LiNbO3) of congruent composition doped Mg2+ [0.01 - 5.5 mol%] Investigated by laser conoscopic metho... 详细信息

关键词： Lithium Niobate Conoscopic Patterns Optical Homogeneity