Корекція процесів апоптозу в кістковому мозку комплексом пептидних фрагментів гемоглобіну при хронічному отруєнні свинцем

Як відомо, солі свинцю мають певну тропність до системи крові: скорочують життя еритроцитів, гальмують синтез гему (блокуючи порф обіліногенсинтетазу - дельта амінолевулінатдегідратазу) та а-ланцюгів гемоглобіну [Авцын с соавт., 1991]. Солі свинцю, як і деяких інших металів, відносяться до канцерогенних і токсичних речовин. Зі стрес індукованою дією свинцю пов’язують експресію генів металотіонеїнів [Кудрин, Жаворонков, 1998]. Ці білки здатні захищати клітини (в тому числі і пухлинні) від вільноради кального пошкодження і від мембранотоксичної дії лікарських препаратів. Тому металотіонеїни можуть запобігати як некрозу, так і апоптозу [Kane et аі., 1993]. Водночас свинець може виступати в ролі апоптогенного стимулу. За даними літератури [Кудрин, Жаворонков, 1998] у хворих після хронічного отруєння солями свинцю зростав рівень фактору некрозу пухлини у сироватці крові.The present work was carried out to study mechanisms controlling interrelations: Haemoglobin peptide complex microelements (plumbum) - marrow cells apoptosis - polypeptide haemoglobin The immunohistochemical analysis shows that the chronical plumbumsalts application causes the oncoprotein bcl-2 expression reducing andinternucleosomal bone - marrow cells DNA fragmentation. The haemoglobin peptidecomplex application decreased the oligonucleosomal DNA fragmentation andintensificated bone-marrow cells protein bcl-2 expression in animals under thechronical lead salt intoxication codition

Feasibility studies of the time-like proton electromagnetic form factor measurements with PANDA at FAIR

The possibility of measuring the proton electromagnetic form factors in the time-like region at FAIR with the \PANDA detector is discussed. Detailed simulations on signal efficiency for the annihilation of $\bar p +p$ into a lepton pair as well as for the most important background channels have been performed. It is shown that precision measurements of the differential cross section of the reaction $\bar p +p \to e^++ e^-$ can be obtained in a wide angular and kinematical range. The individual determination of the moduli of the electric and magnetic proton form factors will be possible up to a value of momentum transfer squared of $q^2\simeq 14$ (GeV/c)$^2$. The total $\bar p +p\to e^++e^-$ cross section will be measured up to $q^2\simeq 28$ (GeV/c)$^2$. The results obtained from simulated events are compared to the existing data. Sensitivity to the two photons exchange mechanism is also investigated.Comment: 12 pages, 4 tables, 8 figures Revised, added details on simulations, 4 tables, 9 figure

Technical Design Report for the PANDA Solenoid and Dipole Spectrometer Magnets

This document is the Technical Design Report covering the two large spectrometer magnets of the PANDA detector set-up. It shows the conceptual design of the magnets and their anticipated performance. It precedes the tender and procurement of the magnets and, hence, is subject to possible modifications arising during this process.Comment: 10 pages, 14MB, accepted by FAIR STI in May 2009, editors: Inti Lehmann (chair), Andrea Bersani, Yuri Lobanov, Jost Luehning, Jerzy Smyrski, Technical Coordiantor: Lars Schmitt, Bernd Lewandowski (deputy), Spokespersons: Ulrich Wiedner, Paola Gianotti (deputy

State of vegetative and cardiovascular system of Chornobyl nuclear accident liquidators

Проведено обследование 2-х групп больных с синдромом вегетативной дистонии (СВД): 1-я группа-57 учасникое ликвидации последствий аварии (ЛПА) на ЧАЭС, 2-я группа 22 больных с СВД невротического геиеза. У больных 1-й и 2-й групп выявлены признаки дисфункции неспецифиче ских регуляторных ( лимбико-ретикулярных) отделов мозга, которые проявляются СВД. Эти регуляторно-вегетативные нарушения, а также метаболические изменения приводят. к церебральной дисциркуляции и миокардиодистрофии, а в дальнейшем, к формированию атеросклероза. В этиопатогеиезе СВД у ЛПА на ЧАЭС ведущую роль играют психогенный и радиационный факторы.Проведено обстеження 2-х груп хворих із синдромом вегетативної дистонії (СВД): 1-а група - 57 учасників ліквідації наслідків аварії (ЛНА) на ЧАЕС, 2-а группа 22 хворих із СВД невротичного генезу. У хворих 1-ї та 2-ї групи виявлені ознаки дис функції неспецифічних регуляторних (лімбіко-ретикулярних) відділів мозку, які проявляються СВД. Ці регуляторно-вегетативні порушення, а також метаболічні зміни приводять до церебральної дисциркуляції і міокард іодистрофії, а в подальшому до фор мування атеросклерозу. В етіопатогенезі СВД у ЛНА на ЧАЕС провідну роль відіграють психогенний і радіаційний фактори.The Examination of 2 groups of patients with autonomic dystonia syndrome (VDS): Group 1 - 57 participants in the liquidation consequences of the Chernobyl accident (LNA), 2nd group of 22 patients with SVD of neurotic origin. At patients of the 1st and 2nd groups signs of dysfunction of nonspecific regulatory (limbic-reticular) departments of a brain which are shown by VDS are revealed. These are regulatory and vegetative disorders, as well as metabolic changes lead to cerebral dyscirculation and myocardial iodystrophy, and subsequently to the formation of atherosclerosis. Psychogenic and radiation factors play a leading role in the etiopathogenesis of SVD in LNA at the Chernobyl NPP

Charge separation relative to the reaction plane in Pb-Pb collisions at sNN=2.76\sqrt{s_{\rm NN}}= 2.76 TeV

Measurements of charge dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV. Two- and three-particle charge-dependent azimuthal correlations in the pseudo-rapidity range $|\eta| < 0.8$ are presented as a function of the collision centrality, particle separation in pseudo-rapidity, and transverse momentum. A clear signal compatible with a charge-dependent separation relative to the reaction plane is observed, which shows little or no collision energy dependence when compared to measurements at RHIC energies. This provides a new insight for understanding the nature of the charge dependent azimuthal correlations observed at RHIC and LHC energies.Comment: 12 pages, 3 captioned figures, authors from page 2 to 6, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/286

A note on comonotonicity and positivity of the control components of decoupled quadratic FBSDE

In this small note we are concerned with the solution of Forward-Backward Stochastic Differential Equations (FBSDE) with drivers that grow quadratically in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem is a comparison result that allows comparing componentwise the signs of the control processes of two different qgFBSDE. As a byproduct one obtains conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio

Feasibility studies of time-like proton electromagnetic form factors at PANDA at FAIR

Simulation results for future measurements of electromagnetic proton form factors at \PANDA (FAIR) within the PandaRoot software framework are reported. The statistical precision with which the proton form factors can be determined is estimated. The signal channel $\bar p p \to e^+ e^-$ is studied on the basis of two different but consistent procedures. The suppression of the main background channel, $\textit{i.e.}$ $\bar p p \to \pi^+ \pi^-$, is studied. Furthermore, the background versus signal efficiency, statistical and systematical uncertainties on the extracted proton form factors are evaluated using two different procedures. The results are consistent with those of a previous simulation study using an older, simplified framework. However, a slightly better precision is achieved in the PandaRoot study in a large range of momentum transfer, assuming the nominal beam conditions and detector performance

Multiplicity dependence of jet-like two-particle correlations in p-Pb collisions at sNN\sqrt{s_{NN}} = 5.02 TeV

Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7 $< p_{\rm{T}, assoc} < p_{\rm{T}, trig} <$ 5.0 GeV/$c$ is examined, to include correlations induced by jets originating from low momen\-tum-transfer scatterings (minijets). The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range $|\eta|<0.9$. The near-side long-range pseudorapidity correlations observed in high-multiplicity p-Pb collisions are subtracted from both near-side short-range and away-side correlations in order to remove the non-jet-like components. The yields in the jet-like peaks are found to be invariant with event multiplicity with the exception of events with low multiplicity. This invariance is consistent with the particles being produced via the incoherent fragmentation of multiple parton--parton scatterings, while the yield related to the previously observed ridge structures is not jet-related. The number of uncorrelated sources of particle production is found to increase linearly with multiplicity, suggesting no saturation of the number of multi-parton interactions even in the highest multiplicity p-Pb collisions. Further, the number scales in the intermediate multiplicity region with the number of binary nucleon-nucleon collisions estimated with a Glauber Monte-Carlo simulation.Comment: 23 pages, 6 captioned figures, 1 table, authors from page 17, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/161

Transverse sphericity of primary charged particles in minimum bias proton-proton collisions at s=0.9\sqrt{s}=0.9, 2.76 and 7 TeV

Measurements of the sphericity of primary charged particles in minimum bias proton--proton collisions at $\sqrt{s}=0.9$, 2.76 and 7 TeV with the ALICE detector at the LHC are presented. The observable is linearized to be collinear safe and is measured in the plane perpendicular to the beam direction using primary charged tracks with $p_{\rm T}\geq0.5$ GeV/c in $|\eta|\leq0.8$. The mean sphericity as a function of the charged particle multiplicity at mid-rapidity ($N_{\rm ch}$) is reported for events with different $p_{\rm T}$ scales ("soft" and "hard") defined by the transverse momentum of the leading particle. In addition, the mean charged particle transverse momentum versus multiplicity is presented for the different event classes, and the sphericity distributions in bins of multiplicity are presented. The data are compared with calculations of standard Monte Carlo event generators. The transverse sphericity is found to grow with multiplicity at all collision energies, with a steeper rise at low $N_{\rm ch}$, whereas the event generators show the opposite tendency. The combined study of the sphericity and the mean $p_{\rm T}$ with multiplicity indicates that most of the tested event generators produce events with higher multiplicity by generating more back-to-back jets resulting in decreased sphericity (and isotropy). The PYTHIA6 generator with tune PERUGIA-2011 exhibits a noticeable improvement in describing the data, compared to the other tested generators.Comment: 21 pages, 9 captioned figures, 3 tables, authors from page 16, published version, figures from http://aliceinfo.cern.ch/ArtSubmission/node/308

Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider

Measurements of multi-particle azimuthal correlations (cumulants) for charged particles in p-Pb and Pb-Pb collisions are presented. They help address the question of whether there is evidence for global, flow-like, azimuthal correlations in the p-Pb system. Comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a $|\Delta \eta|$ gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high-multiplicity, indicating the presence of global azimuthal correlations. The Pb-Pb values are higher than the p-Pb values at similar multiplicities. In both systems, the second harmonic four-particle cumulants exhibit a transition from positive to negative values when the multiplicity increases. The negative values allow for a measurement of $v_{2}\{4\}$ to be made, which is found to be higher in Pb-Pb collisions at similar multiplicities. The second harmonic six-particle cumulants are also found to be higher in Pb-Pb collisions. In Pb-Pb collisions, we generally find $v_{2}\{4\} \simeq v_{2}\{6\}\neq 0$ which is indicative of a Bessel-Gaussian function for the $v_{2}$ distribution. For very high-multiplicity Pb-Pb collisions, we observe that the four- and six-particle cumulants become consistent with 0. Finally, third harmonic two-particle cumulants in p-Pb and Pb-Pb are measured. These are found to be similar for overlapping multiplicities, when a $|\Delta\eta| > 1.4$ gap is placed.Comment: 25 pages, 11 captioned figures, 3 tables, authors from page 20, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/87