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Pulsar B0531 + 21 in the Crab Nebula

International Journal of Astronomy and Astrophysics 2021年第4期11卷 470-480页

作者： boris ja. losovsky Physical Institute of the Russian Academy of Science Pushchino Radio Astronomy Observatory Moscow Russia

The Crab Nebula and its pulsar PSR B0531 + 21 is the space laboratory for the study of fundamental physical processes. From the beginning of the current century up to date, the giant pulses of the pulsar in the Crab Nebula are regularly observed on the Large Phased Array of the Pushchino Radio Astronomy Observatory of the Lebedev Physical Institute at a frequency 111 MHz. The connection between the scattering time scale of radio pulses and the dispersion measure of the pulsar, which was established earlier together with Jodrell Bank, is confirmed. The observed variations in the scattering of radio pulses and their partial correlation with the dispersion measure are explained by the eclipse of the pulsar by dense plasma clouds with fluctuations in the electron density significantly exceeding the corresponding fluctuations in the interstellar medium. The question of a possible connection between period failers (glitches), dispersion measure variations, radio pulses scattering and gamma-ray flares is discussed.

关键词： Pulsar Giant Pulses Dispersion Measure Braking Index Glitches Gamma-Ray Flares

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Compatibility of the Observed Rotation Parameters of Radio Pulsars on Long Time Scales

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International Journal of Astronomy and Astrophysics 2018年第1期8卷 24-45页

作者： Arkady Efimovich Avramenko boris Yakovlevich losovsky Vyacheslav Dmitrievich Pugachev Tatyana Viktorovna Shabanova Pushchino Radio Astronomy Observatory P. N. Lebedev Physical Institute Russian Academy of Sciences Pushchino Russia

We present the results of an analysis of the rotation regularities of pulsars from the current observations and retrospective data on the timing of pulsars at Pushchino Observatory, obtained since 1978 to 2017. Parametric approximation of numerical series of Times of Arrival (ToAs) the convergence polynomial series defined the combinations of numerical values, unique for each pulsar, identical in any reference system for coinciding epochs, irrespective of duration of observations that corresponds to the coherence of periodic radiation of pulsars. The braking index at all observed pulsars is n =−(0.9 ± 0.2) that corresponds monotony of slowing down of rotation (>0). The polynomial power series of the intervals calculated in observed parameters of rotation represent an analytical time scale on which variations of observed intervals, uncorrelated with rotation, are counted, as at pulsars B1919+21 and B0809+74, or the unpredictable variations of intervals defining the movement of a pulsar in the supernova remnants, as at PSR B0531+21 or at PSR B1822-09 which spontaneous movement also doesn’t exclude its belonging to the supernova remnants.

关键词： Neutron Stars:Pulsars:Rotation Second Derivative Braking Index Moving

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Pulsar B0531 + 21 in the Crab Nebula

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International Journal of Astronomy and Astrophysics（天文学与天体物理学国际期刊） 2021年第4期

作者： boris ja.losovsky

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Interaction of Hemoglobin with Binuclearcationic Tetranitrosyl Iron Complex with Penicillamine. Cations Binding Sites

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Advances in Biological Chemistry 2015年第3期5卷 169-178页

作者： Lidia Syrtsova Natalia Sanina boris Psikha Ildar Tukhvatullin Natal’ja.Shkondina Olesia Pokidova Alexander Kotelnikov Institute of Problems of Chemical Physics of the Russian Academy of Sciences Moscow Region Russian Federation

In this paper, the kinetics of the interaction of the nitrosyl iron complex with the ligands penicillamine [Fe2(SC5H11NО2)2(NO)4]SO4·5H2O (I) with deoxyhemoglobin (Hb) was studied. The kinetic modeling method defined the number of binding (I) molecules and equilibrium constant of the coupling reaction of (Biomedicine, Iron-Sulfur Cluster, Ligand Binding, Heme, Nitric Oxide ) with Hb (Ks). At equimolar concentrations of (I) and Hb (2 × 10−5 M), the Hb molecule binds only one (I) with Ks equal to 4.3 × 107 M−1. When increasing the (Biomedicine, Iron-Sulfur Cluster, Ligand Binding, Heme, Nitric Oxide ) concentration, the number of binding sites of Hb increases and Ks decreases. These results are analyzed in accordance with the data on the existence of cations binding sites in Hb.

关键词： Biomedicine Iron-Sulfur Cluster Ligand Binding Heme Nitric Oxide

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