TiO2-NiO and TiO2-Co3O4 spheres: synthesis and characterization

TiO2-based composites doped with d-metal oxides are prospective catalysts. In this paper we obtained spherical particles of TiO2–NiO and TiO2–Co3O4 composites by a template method accompanied with sol-gel one. Ion exchange resin of TOKEM-100 and TOKEM-250 was used as an organic polymer matrix. Complex studies were carried out to identify the formation process, compositions and morphology of obtained particles by thermal analysis, X-ray diffractometey, scanning electron microscopy and micro-X-ray spectral analyses The formation of TiO2–Co3O4 and TiO2–NiO composite particles ends at 600 and 500°C, respectively at using TOKEM-100 and TOKEM-250 resins. The size of final spherical particles found to be in a range from 300 to 700 μm, and their morphology depends on its compositio

Synthesis of stable sols based on titanium dioxide, silicon and metal ion for use in photocatalysis

The paper presents the study of physicochemical processes occurring during the preparation of film-forming solutions, as well as the effect of the component composition on the stability of film-forming solutions over time. Compositions of stable film-forming solutions of TBT, TBT-TEOS, TBT-TEOS-AgNO3 suitable for the formation of thin-film coatings have been developed, and the time periods of stability of rheological properties have been determined. It was found that the addition of tetrabutoxytitanium after the establishment of chemical equilibrium in the solution increases the stability of the film-forming solutions. Optimization of the method of solutions preparation for obtaining films with reproducible physicochemical properties has been carried out

Prediction of Anisotropic Single-Dirac-Cones in Bi1−x{}_{1-x}Sbx{}_{x} Thin Films

The electronic band structures of Bi${}_{1-x}$Sb${}_{x}$ thin films can be varied as a function of temperature, pressure, stoichiometry, film thickness and growth orientation. We here show how different anisotropic single-Dirac-cones can be constructed in a Bi${}_{1-x}$Sb${}_{x}$ thin film for different applications or research purposes. For predicting anisotropic single-Dirac-cones, we have developed an iterative-two-dimensional-two-band model to get a consistent inverse-effective-mass-tensor and band-gap, which can be used in a general two-dimensional system that has a non-parabolic dispersion relation as in a Bi${}_{1-x}$Sb${}_{x}$ thin film system

Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering

A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality $Q^{2}>1$ (GeV/$c$)$^2$, invariant mass of the hadronic system $W > 5$ GeV/$c^2$, Bjorken scaling variable in the range $0.003 < x < 0.4$, fraction of the virtual photon energy carried by the hadron in the range $0.2 < z < 0.8$, square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 (GeV/$c)^2 < P_{\rm{hT}}^{2} < 3$ (GeV/$c$)$^2$. The multiplicities are presented as a function of $P_{\rm{hT}}^{2}$ in three-dimensional bins of $x$, $Q^2$, $z$ and compared to previous semi-inclusive measurements. We explore the small-$P_{\rm{hT}}^{2}$ region, i.e. $P_{\rm{hT}}^{2} < 1$ (GeV/$c$)$^2$, where hadron transverse momenta are expected to arise from non-perturbative effects, and also the domain of larger $P_{\rm{hT}}^{2}$, where contributions from higher-order perturbative QCD are expected to dominate. The multiplicities are fitted using a single-exponential function at small $P_{\rm{hT}}^{2}$ to study the dependence of the average transverse momentum $\langle P_{\rm{hT}}^{2}\rangle$ on $x$, $Q^2$ and $z$. The power-law behaviour of the multiplicities at large $P_{\rm{hT}}^{2}$ is investigated using various functional forms. The fits describe the data reasonably well over the full measured range.Comment: 28 pages, 20 figure

Инвазивный микоз с поражением центральной нервной системы, обусловленный редкими дрожжевыми грибами Malassezia spp., у пациентов с острым лейкозом: описание клинических случаев и обзор литературы

Malassezia spp. is a commensal yeast that represents normal microflora in humans and some animals. However, Malassezia spp. can cause life-threatening invasive mycosis. Evidence on Malassezia spp. infections is limited mostly to a case reports describing disease in newborns and premature infants, because lipid infusions (total parenteral nutrition) given through central venous catheter is a major risk factor. Here, we report two cases of CNS infection caused by Malassezia species in non-neonates with acute leukemia.Malassezia spp. — дрожжевые грибы, которые представлены в составе нормальной микрофлоры кожи человека и как симбионт препятствуют развитию инфекций, обусловленных опасными патогенами. Однако Malassezia spp. также может стать причиной тяжелого инвазивного микоза и привести к летальному исходу. Данные литературы ограничены, представлены преимущественно публикациями об инфекциях у новорожденных и недоношенных детей, что, в первую очередь, связывают с известным фактором риска — применение парентерального питания, включающего в себя жировую эмульсию, с использованием центрального венозного катетера. Мы представляем клинические случаи инфекции центральной нервной системы, обусловленной редкими возбудителями, дрожжевыми грибами рода Malassezia, у детей с острым лейкозом

Инвазивный аспергиллез, обусловленный Aspergillus non-fumigatus, у взрослых пациентов после аллогенной трансплантации гемопоэтических стволовых клеток

   Objective. To study the features of invasive aspergillosis (IA) due to A. non-fumigatus versus A. fumigatus in adult (≥ 18 years) recipients of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in 2016-2021.   Materials and methods. The study included 33 patients with IA caused by A. non-fumigatus (n = 20) and A. fumigatus (n = 13). A comparative analysis of cases of IA, the results of therapy and outcomes in patients after allo-HSCT in the RM Gorbacheva Research Institute was performed. Diagnostic criteria EORTC / MSGERC 2020 were used.   Results. Invasive aspergillosis caused by A. non-fumigatus made up the majority (60.6 %) of IA cases with an identified pathogen registered in patients after allo-HSCT in the period from 2016 to 2021. The main etiological agents in the A. non-fumigatus group were A. niger in 13 (65 %) patients, A. flavus – in 4 (20 %). The median day of diagnosis of A. non-fumigatus IAwas + 110 days (17–2093), for A. fumigatus it was + 46 days (2–866) (p = 0.171). Overall 12-week survival was 55 % and 59.2 % in the A. non-fumigatus and A. fumigatus groups, respectively (p = 0.617). The majority of patients in both the A. fumigatus (n = 10, 77 %) and A. non-fumigatus (n = 16, 80 %) groups received voriconazole as initial antifungal therapy. Second-linetherapy was required in 2 (10 %) patients with A. non-fumigatus IA: liposomal amphotericin B and echinocandins with or with-out posaconazole, and 2 (15 %) patients in the A. fumigatus group: liposomal amphotericin B and voriconazole in combination with echinocandins. A comparative analysis showed that in patients from the two groups, none of the assessed signs (gender, age, underlying disease, disease status at the time of transplantation, time from diagnosis to allo-HSCT, source of hematopoietic stem cells, conditioning regimen, donor type, antifungal prophylaxis, cytomegalovirus reactivation, severe acute and chronic graft-versus-host disease) did not differ significantly.   Conclusions. A. niger is the main causative agent of IA caused by A. non-fumigatus. Patients characteristics, their treatment and outcomes did not differ significantly between the A. non-fumigatus and A. fumigatus groups.   Цель: изучить особенности инвазивного аспергиллеза, обусловленного A. не-fumigatus в сравнении с A. fumigatus, у взрослых (≥ 18 лет) реципиентов аллогенной трансплантации гемопоэтических стволовыхклеток в 2016–2021 гг.   Материалы и методы. В исследование включили 33 пациента с инвазивным аспергиллезом, обусловленным A. не-fumigatus (n=20) и A. fumigatus (n=13), после аллогенной трасплантации гемопоэтических клеток, выполненной в клинике Научно-исследовательского института детской онкологии, гематологии и трансплантологии им. Р. М. Горбачевой. Использовали диагностические критерии EORTC / MSGERC, 2020.   Результаты. Обусловленный A. не-fumigatus инвазивный аспергиллез составил большую часть (60,6 %) случаев инвазивного аспергиллеза с идентифицированным возбудителем у пациентов после алло-трансплантации гемопоэтических стволовых клеток в 2016–2021 гг. В группе A. не-fumigatus основными возбудителями были A. niger (13, 65 %) и A. flavus (4, 20 %). Сравнительный анализ показал, что в группах сравнения ни один из оцениваемых признаков (пол, возраст, диагноз, статус заболевания на момент трансплантации, время от постановки диагноза до аллотрансплантации гемопоэтических стволовых клеток, источник гемопоэтических стволовых клеток, режим кондиционирования, тип донора, противогрибковая профилактика, реактивация цитомегаловируса, тяжелая острая и хроническая реакция трансплантат против хозяина) достоверно не различались. Медиана срока постановки диагноза A. не-fumigatus инвазивного аспергиллеза составила 110 дней (17 – 2093) после алло-трансплантации гемопоэтических стволовых клеток, A. fumigatus инвазивного аспергиллеза – 46 дней (2 – 866) (p = 0,171). Большинство пациентов с A. fumigatus инвазивным аспергиллезом (n = 10, 77 %) и A. не-fumigatus инвазивным аспергиллезом (n = 16, 80 %) в качестве стартовой противогрибковой терапии получали вориконазол. Терапия второй линии потребовалась 2 (10 %) пациентам с A. не-fumigatus инвазивным аспергиллезом (липосомальный амфотерицин В, эхинокандины и позаконазол) и 2 (15 %) пациентам с А. fumigatus инвазивным аспергиллезом (липосомальный амфотерицин В, вориконазол в комбинации с эхинокандином). Общая выживаемость пациентов с A. неfumigatus инвазивным аспергиллезом в течение 12 недель составила 55 %, A. fumigatus инвазивным асппергиллезом – 59,2 % (p = 0,617).   Выводы. A. niger – основной возбудитель инвазивного аспергиллеза, обусловленного A. non-fumigatus. Характеристики пациентов, их лечение и исходы достоверно не различались между группами A. не-fumigatus и A. fumigatus

Corrigendum to "Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section" [Phys. Lett. B 793 (2019) 188]

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Light isovector resonances in π-p →π-π-π+p at 190 GeV/c

We have performed the most comprehensive resonance-model fit of π-π-π+ states using the results of our previously published partial-wave analysis (PWA) of a large data set of diffractive-dissociation events from the reaction π-+p→π-π-π++precoil with a 190 GeV/c pion beam. The PWA results, which were obtained in 100 bins of three-pion mass, 0.5<2.5 GeV/c2, and simultaneously in 11 bins of the reduced four-momentum transfer squared, 0.1<1.0 (GeV/c)2, are subjected to a resonance-model fit using Breit-Wigner amplitudes to simultaneously describe a subset of 14 selected waves using 11 isovector light-meson states with JPC=0-+, 1++, 2++, 2-+, 4++, and spin-exotic 1-+ quantum numbers. The model contains the well-known resonances π(1800), a1(1260), a2(1320), π2(1670), π2(1880), and a4(2040). In addition, it includes the disputed π1(1600), the excited states a1(1640), a2(1700), and π2(2005), as well as the resonancelike a1(1420). We measure the resonance parameters mass and width of these objects by combining the information from the PWA results obtained in the 11 t′ bins. We extract the relative branching fractions of the ρ(770)π and f2(1270)π decays of a2(1320) and a4(2040), where the former one is measured for the first time. In a novel approach, we extract the t′ dependence of the intensity of the resonances and of their phases. The t′ dependence of the intensities of most resonances differs distinctly from the t′ dependence of the nonresonant components. For the first time, we determine the t′ dependence of the phases of the production amplitudes and confirm that the production mechanism of the Pomeron exchange is common to all resonances. We have performed extensive systematic studies on the model dependence and correlations of the measured physical parameters

Эпидемиология и результаты терапии первой линии ВИЧ-ассоциированной лимфомы Ходжкина

Introduction. The risk of developing Hodgkin lymphoma (HL) with HIV infection is higher than in the general population, and the course of the disease itself is more aggressive. Currently, there is no unified approach to the treatment of HIV-related HL, and data on its epidemiology in the Russian Federation are limited.The objective was to study epidemiological characteristics, the used therapeutic tactics and the results of treatment for HIV-related HL.Methods and materials. The multicenter retrospective study included 46 patients with HIV- related HL treated in 9 centers of the Russian Federation. Descriptive statistics methods were used, the analysis of overall survival (OS) and progression-free survival (PFS) was performed using the Kaplan–Meier method.Results. HIV-related HL is more often represented by an advanced stage, B-symptoms, and extranodal lesions. The ABVD regimen was used as the first-line therapy in 60 % for HIV-related HL. The overall response to therapy was 81.6 %, and the 2-year OS and PFS were 85 % and 49 %, respectively. Factors that worsened OS were CD4+˂266 cells/mcL and general somatic status ECOG≥2. Введение. Вероятность развития лимфомы Ходжкина (ЛХ) на фоне ВИЧ-инфекции выше, чем в общей популяции, а течение заболевания имеет более агрессивный характер. В настоящий момент отсутствует единый подход к терапии ЛХ на фоне ВИЧ, а данные об ее эпидемиологии в Российской Федерации ограничены.Цель – изучить эпидемиологическую характеристику, применяемую терапевтическую тактику и результаты лечения лимфомы Ходжкина на фоне ВИЧ-инфекции.Методы и материалы. В многоцентровое ретроспективное исследование были включены 46 пациентов с диагнозом «ЛХ» на фоне ВИЧ, получавших лечение в девяти центрах Российской Федерации. Применяли методы описательной статистки, анализ общей выживаемости (ОВ) и беспрогрессивной выживаемости (БПВ) выполняли с использованием метода Каплана – Мейера.Результаты. ЛХ на фоне ВИЧ чаще представлена распространенной стадией, В-симптомами и экстранодальным поражением. В качестве терапии первой линии ЛХ на фоне ВИЧ в 60 % случаев использовалась схема ABVD. Общий ответ на терапию составил 81,6 %, а 2-летняя ОВ и БПВ составили 85 и 49 % соответственно. Факторами, снижающими ОВ, являлись уровень CD4+&lt;266 кл/мкл и общесоматический статус ECOG≥2. Ключевые слова: лимфома Ходжкина, ВИЧ, CD4+, ECOG, многоцентровое исследование, терапия первой линии&gt;˂ 266 кл/мкл и общесоматический статус ECOG≥2.

Using Shifts in Amino Acid Frequency and Substitution Rate to Identify Latent Structural Characters in Base-Excision Repair Enzymes

Protein evolution includes the birth and death of structural motifs. For example, a zinc finger or a salt bridge may be present in some, but not all, members of a protein family. We propose that such transitions are manifest in sequence phylogenies as concerted shifts in substitution rates of amino acids that are neighbors in a representative structure. First, we identified rate shifts in a quartet from the Fpg/Nei family of base excision repair enzymes using a method developed by Xun Gu and coworkers. We found the shifts to be spatially correlated, more precisely, associated with a flexible loop involved in bacterial Fpg substrate specificity. Consistent with our result, sequences and structures provide convincing evidence that this loop plays a very different role in other family members. Second, then, we developed a method for identifying latent protein structural characters (LSC) given a set of homologous sequences based on Gu's method and proximity in a high-resolution structure. Third, we identified LSC and assigned states of LSC to clades within the Fpg/Nei family of base excision repair enzymes. We describe seven LSC; an accompanying Proteopedia page (http://proteopedia.org/wiki/index.php/Fpg_Nei_Protein_Family) describes these in greater detail and facilitates 3D viewing. The LSC we found provided a surprisingly complete picture of the interaction of the protein with the DNA capturing familiar examples, such as a Zn finger, as well as more subtle interactions. Their preponderance is consistent with an important role as phylogenetic characters. Phylogenetic inference based on LSC provided convincing evidence of independent losses of Zn fingers. Structural motifs may serve as important phylogenetic characters and modeling transitions involving structural motifs may provide a much deeper understanding of protein evolution