AIM. To work up the optimal approach to the prevention and treatment of hemorrhoids in pregnant women in antenatal and postpartum women in the immediate postpartum period. MATERIAL AND METHODS. Based on the comparative results of treatment of hemorrhoids using topical and systemic medicinal drugs in 113 pregnant women determined the effectiveness of preventive and therapeutic tactics in respect of haemorrhoidal disease in pregnancy and the early postpartum period.. Treatment schemes designed for optimum efficiency and safety of treatment of acute hemorrhoids in this patient's category. RESULTS. The use of investigated schemes for treatment and prevention can significantly reduce the risk of exacerbation of the hemorrhoids and reduce the terms of relief of symptoms in pregnant and postpartum women. The experience of the Detralex (Daflon 500) demonstrates the effectiveness and good tolerability of this product when used in pregnant women for treatment and prevention of postpartum exacerbation of hemorrhoids.
Throughout the Late Neogene, the Black Sea experienced large paleoenvironmental changes, switching between (anoxic) marine conditions when connected to the Mediterranean Sea and (oxic) freshwater conditions at times of isolation. We create a magnetostratigraphic time frame for three sites drilled during Deep Sea Drilling Project (DSDP) Leg 42B to the Black Sea (drilled in 1975). At the time, magnetostratigraphic dating was impossible because of the presence of the little understood iron sulfide mineral greigite (in sediments a precursor to pyrite) as magnetic carrier. Our rock-magnetic results indicate that only anoxic conditions result in poor magnetic signal, likely as a result of pyrite formation in the water column rather than in the sediment. The magnetostratigraphic results indicate that Hole 379A, drilled in the basin center, has a continuous sedimentary record dating back to 1.3 Ma. Hole 380/380A is subdivided into three consistent intervals, 0-700 mbsf, 700-860 mbsf and 860-1075 mbsf. The top unit covers the Pleistocene but the magnetostratigraphy is likely compromised by the presence of mass transport deposits. The middle unit spans between 4.3 and 6.1 Ma and records continuous deposition at ~10 cm/kyr. The lower unit lacks the independent age constraints to correlate the obtained magnetostratigraphy. Hole 381 is drilled on the Bosporus slope and as a result, hiatuses are common. A correlation to the nearby Hole 380/380A is proposed, but indicates deposits cannot straightforwardly be traced across the slope. Our improved age model does not support the original interpretation based on these cores of a desiccation of the Black Sea during the Messinian salinity crisis.
The quantification of uncertainties of various calculation results, caused by the uncertainties associated with the input nuclear data, is a common task in nuclear reactor physics applications. Modern computation resources and improved knowledge on nuclear data allow nowadays to significantly advance the capabilities for practical investigations. Stochastic sampling is the method which has received recently a high momentum for its use and exploration in the domain of reactor design and safety analysis. An application of a stochastic sampling based tool towards nuclear reactor dosimetry studies is considered in the given paper with certain exemplary test evaluations. The stochastic sampling not only allows the input nuclear data uncertainties propagation through the calculations, but also an associated correlation analysis performance with no additional computation costs and for any parameters of interest can be done. Thus, an example of assessment of the Pearson correlation coefficients for several models, used in practical validation studies, is shown here. As a next step, the analysis of the obtained information is proposed for discussion, with focus on the systems similarities assessment. The benefits of the employed method and tools with respect to practical reactor dosimetry studies are consequently outlined
We explore the rates of tidal disruption events (TDEs) of stars bysupermassive black holes (SBHs) in galactic nuclei formed in mergers followedby a formation and coalescence of a binary SBH. Such systems initially have adeficit of stars on low-angular-momentum orbits caused by the slingshot processduring the binary SBH stage, which tends to reduce the flux of stars into theSBH compared to the steady-state value. On the other hand, a newly formedgalactic nucleus has a non-spherical shape which enhances the mixing of starsin angular momentum and thus the TDE rate. In galaxies with relatively low SBHmasses (<10^7 Msun), relaxation times are short enough to wash out theanisotropy in initial conditions, and for more massive SBH the enhancement offlux due to non-sphericity turns out to be more important than its suppressiondue to initial anisotropy. Therefore, the present-day TDE rates generallyexceed conventional steady-state estimates based on a spherical isotropicapproximation. We thus conjecture that the lower observationally inferred TDErates compared to theoretical predictions cannot be attributed to the depletionof low-angular-momentum stars by SBH binaries.
William Gilbert formulated over 400 years ago a postulate that can be considered as the main principle of modern natural sciences [1]: All theoretical constructs that claim to be scientific must be verified and confirmed experimentally. Despite of past centuries, this principle has not lost its relevance today. In the modern physics there are some conventional theories, which do not satisfy to Gilbert’s postulate [2]. In physics of microcosm there are models which cannot be compared with the measurement data as they do not allow to calculate the basic characteristic parameters (such as masses or magnetic moments) of elementary particles. In this article an alternative approach to these problems is considered. It is shown that an attraction in the proton-neutron pair can occur due to the exchange of relativistic electron. The estimation of this exchange energy is in agreement with the experimental values of the binding energy of some light nuclei. At that neutron is regarded as a composite corpuscule consisting of proton and relativistic electron that allows predicting the neutron magnetic moment, its mass and energy of its decay. It is shown that the standard Maxwell’s theory of electromagnetic field describes a possibility to initiate in free space (in empty ether) a magnetic ϒ-quantum (a splash of magnetic field), devoid of the electric component and having spin . Since magnetic monopoles do not exist, a characteristic feature of the magnetic ϒ-quantum is the weakness of its interaction with matter, which is many orders of magnitude smaller than that of the electromagnetic wave. These properties suggest that the magnetic ϒ-quantum can be identified with neutrinos. On this basis, we get a fresh look on the nature of π-me-sons and μ-mesons and calculate their masses.