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Iashina, E.G. (author), Bouwman, W.G. (author), Duif, C.P. (author), Dalgliesh, Robert M. (author), Varfolomeeva, Elena Y. (author), Pantina, Rimma A. (author), Kovalev, Roman A. (author), Fedorova, Natalia D. (author), Grigoriev, S. V. (author)The organization of chromatin in the nuclei of rat lymphocyte was studied by time-of-flight spin-echo small-angle neutron scattering (ToF-SESANS). The procedures of the measurements in ToF and monochromatic SESANS modes were compared. It is shown that the sensitivity of the ToF method is significantly higher than that of the monochromatic mode....journal article 2023
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van den Berg, Cyntha M. (author), Volkov, V. (author), Schnorrenberg, Sebastian (author), Huang, Ziqiang (author), Stecker, Kelly E. (author), Grigoriev, Ilya (author), Gilani, Sania (author), Frikstad, Kari Anne M. (author), Dogterom, A.M. (author)Microtubules are dynamic cytoskeletal polymers, and their organization and stability are tightly regulated by numerous cellular factors. While regulatory proteins controlling the formation of interphase microtubule arrays and mitotic spindles have been extensively studied, the biochemical mechanisms responsible for generating stable...journal article 2023
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Iashina, Ekaterina G. (author), Filatov, Mikhail V. (author), Pantina, Rimma A. (author), Varfolomeeva, Elena Y. (author), Bouwman, W.G. (author), Duif, C.P. (author), Honecker, Dirk (author), Pipich, Vitaliy (author), Grigoriev, Sergey V. (author)This paper reports on the two-scale fractal structure of chromatin organization in the nucleus of the HeLa cell. Two neutron scattering methods, small-angle neutron scattering (SANS) and spin-echo SANS, are used to unambiguously identify the large-scale structure as being a logarithmic fractal with the correlation function (r) - ln(r/E). The...journal article 2019
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Iashina, E.G. (author), Bouwman, W.G. (author), Duif, C.P. (author), Filatov, M.V. (author), Grigoriev, S. V. (author)Spin-echo small-angle scattering (SESANS) technique is a method to measure the structure of materials from nano- to micrmeter length scales. This method could be important for studying the packaging of DNA in the eukaryotic cell. We measured the SESANS function from chicken erythrocyte nuclei which is well fitted by the exponential function G...journal article 2017
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Iashina, E.G. (author), Velichko, E. (author), Filatov, M.V. (author), Bouwman, W.G. (author), Duif, C.P. (author), Brulet, A. (author), Grigoriev, S. V. (author)Small-angle neutron scattering (SANS) on nuclei of chicken erythrocytes demonstrates the cubic dependence of the scattering intensity Q−3 in the range of momentum transfer Q∈10−3–10−2nm−1. Independent spin-echo SANS measurements give the spin-echo function, which is well described by the exponential law in a range of sizes (3×102)–(3×104) nm....journal article 2017
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Kraan, W.H. (author), Zabenkin, V.N. (author), Axelrod, LA (author), Chetverikov, Yu.O. (author), Grigoriev, SV (author), Yashina, E.G. (author), Sumbatyan, A.A. (author)We made software to simulate Larmor precession in a setup for SESANS with adiabatic/RF flippers in magnets, existing at PNPI. The final polarisation of a divergent “ribbon beam” of height 2 cm is calculated as a function of λ. For λ= 6 A, flippers 56 cm apart and RF frequency 1 MHz we find spin-echo length δ= 0.9 μm. We show numerically, how λ...journal article 2017
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Grigoryeva, N.A. (author), Mistonov, A.A. (author), Napolskii, K.S. (author), Sapoletova, N.A. (author), Eliseev, A.A. (author), Bouwman, W.G. (author), Byelov, D.V. (author), Petukhov, A.V. (author), Chernyshov, D.Y. (author), Eckerlebe, H. (author), Vasilieva, A.V. (author), Grigoriev, S.V. (author)The magnetic and structural properties of a cobalt inverse opal-like crystal have been studied by a combination of complementary techniques ranging from polarized neutron scattering and superconducting quantum interference device (SQUID) magnetometry to x-ray diffraction. Microradian small-angle x-ray diffraction shows that the inverse opal-like...journal article 2011
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Kraan, W.H. (author), Grigoriev, S.V. (author), Rekveldt, M.T. (author)We show how the geometric (Berry’s) phase becomes manifest on adiabatic rotation of the polarization vector in the magnetic field configuration in the arms in a neutron spin echo (NSE) experiment.When the neutron beam used is monochromatic, a geometric phase collected in one spin-echo arm can be exactly compensated in the other arm either by an...journal article 2010
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Pappas, C. (author), Lelièvre-Berna, E. (author), Falus, P. (author), Bentley, P.M. (author), Moskvin, E. (author), Grigoriev, S. (author), Fouquet, P. (author), Farago, B. (author)We present a comprehensive study of chiral fluctuations in the reference helimagnet MnSi by polarized neutron scattering and neutron spin echo spectroscopy, which reveals the existence of a completely left-handed and dynamically disordered phase. This phase may be identified as a spontaneous Skyrmion phase: it appears in a limited temperature...journal article 2009
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- Grigoriev, S.V. (author), Chetverikov, Y.O. (author), Metelev, S.V. (author), Kraan, W.H. (author) journal article 2006
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- Grigoriev, S.V. (author), Kraan, W.H. (author), Rekveldt, M.Th. (author) journal article 2004
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- Grigoriev, S.V. (author), Maleyev, S.V. (author), Okorokov, A.I. (author), Eckerlebe, H. (author), van Dijk, N.H. (author) journal article 2004
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- Grigoriev, S.V. (author), Chetverikov, Yu.O. (author), Syromyatnikov, A.V. (author), Kraan, W.H. (author), Rekveldt, M.Th. (author) journal article 2003
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- Grigoriev, S.V. (author), Klimko, S.A. (author), Kraan, W.H. (author), Maleyev, S.V. (author), Okorokov, A.I. (author), Rekveldt, M.Th. (author), Runov, V.V. (author) journal article 2001
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- Grigoriev, S.V. (author), Kraan, W.H. (author), Mulder, F.M. (author), Rekveldt, M.Th. (author) journal article 2000
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- Grigoriev, S.V. (author), Kreuger, R. (author), Kraan, W.H. (author), Mulder, F.M. (author), Rekveldt, M.Th. (author) journal article 2000