421 research outputs found

    Evaluation of the influence of Inosine pranobex on the matrix protein system in patients with chronic viral cervicitis

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    The reproductive potential of both women and men is declining every year. Many factors contribute to the violation of the reproductive function – chemical, physical, mechanical, psychogenic, however, biological factors have the most pronounced effect on reproduction. Chronic viral cervicitis can be not only the cause of infertility and reproductive losses, but also the development of intraepithelial dysplasia, as well as cervical cancer. PVI, as a monoinfection, is quite rare along with HPV. Other UGIs (urogenital infections) act as common routes of transmission and entry gates. The most common association with PVI is herpesvirus infection. An increase in MMP, both systemically and at the local level, may indicate a violation of cell modeling processes, which contributes to the development of autoimmune inflammation with further destruction of the tissues of the reproductive tract. Activation of MMP promotes the release of HSV from the nerve ganglia and reactivation of the infection. Therapy for HPV and HVI (herpes virus infections) are debatable. There is no single standard of treatment, but there are a number of drugs that have antiviral and immunomodulatory effects. Currently, there are no studies on the dynamics of the effect of HPV and HSV infection on the state of MMPs and TIMPs during Inosine pranobex therapy. Objective: to evaluate changes in matrix metalloproteinases 2 and 9 and their tissue inhibitors types 1 and 2 in patients with human papillomavirus and herpes infections after Inosine pranobex therapy. 6 patients with papillomavirus and herpetic infections were examined and treated with drugs containing the active ingredient Inosine pranobex. The levels of MMP-2, MMP-9 and TIMP-1, TIMP-2 in blood serum were determined using specific reagents from R&D Diagnostics Inc. (USA). The dynamics of indicators in the blood serum of patients with PVI showed a decrease in the level of MMP-2, MMP-9, TIMP-1 with a simultaneous increase in TIMP-2 relative to the values before therapy. In patients with PVI and HVI, Inosine pranobex therapy showed a decrease in MMP-2 and MMP-9 levels, no changes in the content of TIMP-1, but an increase in the serum content of TIMP-2. Prior to the use of therapy, an increase in the ratio in the main groups in comparison with the control group was found, however, the largest increase was found in the group with the association of infections. After therapy, positive dynamics was established in the main groups. Thus, the ratio in group I decreased and became equal to the control values. In the II group of patients, the ratio, despite the decrease, remained higher than the control values and higher in comparison with the I group of women

    Search for Doubly-Charged Higgs Boson Production at HERA

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    A search for the single production of doubly-charged Higgs bosons H^{\pm \pm} in ep collisions is presented. The signal is searched for via the Higgs decays into a high mass pair of same charge leptons, one of them being an electron. The analysis uses up to 118 pb^{-1} of ep data collected by the H1 experiment at HERA. No evidence for doubly-charged Higgs production is observed and mass dependent upper limits are derived on the Yukawa couplings h_{el} of the Higgs boson to an electron-lepton pair. Assuming that the doubly-charged Higgs only decays into an electron and a muon via a coupling of electromagnetic strength h_{e \mu} = \sqrt{4 \pi \alpha_{em}} = 0.3, a lower limit of 141 GeV on the H^{\pm\pm} mass is obtained at the 95% confidence level. For a doubly-charged Higgs decaying only into an electron and a tau and a coupling h_{e\tau} = 0.3, masses below 112 GeV are ruled out.Comment: 15 pages, 3 figures, 1 tabl

    Forward pi^0 Production and Associated Transverse Energy Flow in Deep-Inelastic Scattering at HERA

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    Deep-inelastic positron-proton interactions at low values of Bjorken-x down to x \approx 4.10^-5 which give rise to high transverse momentum pi^0 mesons are studied with the H1 experiment at HERA. The inclusive cross section for pi^0 mesons produced at small angles with respect to the proton remnant (the forward region) is presented as a function of the transverse momentum and energy of the pi^0 and of the four-momentum transfer Q^2 and Bjorken-x. Measurements are also presented of the transverse energy flow in events containing a forward pi^0 meson. Hadronic final state calculations based on QCD models implementing different parton evolution schemes are confronted with the data.Comment: 27 pages, 8 figures and 3 table

    Measurement of the charm and beauty structure functions using the H1 vertex detector at HERA

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    Inclusive charm and beauty cross sections are measured in e − p and e + p neutral current collisions at HERA in the kinematic region of photon virtuality 5≤Q 2≤2000 GeV2 and Bjorken scaling variable 0.0002≤x≤0.05. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb−1. The numbers of charm and beauty events are determined using variables reconstructed by the H1 vertex detector including the impact parameter of tracks to the primary vertex and the position of the secondary vertex. The measurements are combined with previous data and compared to QCD predictions

    Unbinned Deep Learning Jet Substructure Measurement in High Q2Q^2 ep collisions at HERA

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    The radiation pattern within high energy quark- and gluon-initiated jets (jet substructure) is used extensively as a precision probe of the strong force as well as an environment for optimizing event generators with numerous applications in high energy particle and nuclear physics. Looking at electron-proton collisions is of particular interest as many of the complications present at hadron colliders are absent. A detailed study of modern jet substructure observables, jet angularities, in electron-proton collisions is presented using data recorded using the H1 detector at HERA. The measurement is unbinned and multi-dimensional, using machine learning to correct for detector effects. All of the available reconstructed object information of the respective jets is interpreted by a graph neural network, achieving superior precision on a selected set of jet angularities. Training these networks was enabled by the use of a large number of GPUs in the Perlmutter supercomputer at Berkeley Lab. The particle jets are reconstructed in the laboratory frame, using the kTk_{\mathrm{T}} jet clustering algorithm. Results are reported at high transverse momentum transfer Q2>150Q^2>150 GeV2{}^2, and inelasticity 0.2<y<0.70.2 < y < 0.7. The analysis is also performed in sub-regions of Q2Q^2, thus probing scale dependencies of the substructure variables. The data are compared with a variety of predictions and point towards possible improvements of such models.Comment: 33 pages, 10 figures, 8 table

    Erratum to: Determination of the strong coupling constant {{\varvec{\alpha _{\mathrm{s}} (m_{\mathrm{Z}})}}} in next-to-next-to-leading order QCD using H1 jet cross section measurements

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    Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions

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    The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic ep scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of αs(M2Z) and the PDFs, was performed with the result αs(M2Z)=0.1156±0.0011 (exp) +0.0001−0.0002 (model +parameterisation) ±0.0029 (scale). The PDF sets of HERAPDF2.0Jets NNLO were determined with separate fits using two fixed values of αs(M2Z), αs(M2Z)=0.1155 and 0.118, since the latter value was already chosen for the published HERAPDF2.0 NNLO analysis based on HERA inclusive DIS data only. The different sets of PDFs are presented, evaluated and compared. The consistency of the PDFs determined with and without the jet data demonstrates the consistency of HERA inclusive and jet-production cross-section data. The inclusion of the jet data reduced the uncertainty on the gluon PDF. Predictions based on the PDFs of HERAPDF2.0Jets NNLO give an excellent description of the jet-production data used as input

    Inelastic photoproduction of J/Psi mesons at HERA

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    An analysis of inelastic photoproduction of J/Psi mesons is presented using data collected at the ep collider HERA corresponding to an integrated luminosity of above 80pb-1. Differential and double differential cross sections are measured in a wide kinematic region: 6

    On the Rise of the Proton Structure Function F2_2 Towards Low x

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    A measurement of the derivative (d ln F_2 / d lnx)_(Q^2)= -lambda(x,Q^2) of the proton structure function F_2 is presented in the low x domain of deeply inelastic positron-proton scattering. For 5*10^(-5)=1.5 GeV^2, lambda(x,Q^2) is found to be independent of x and to increase linearly with ln(Q^2)
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