ДИФФЕРЕНЦИАЛЬНАЯ ДИАГНОСТИКА ИНФЕКЦИОННЫХ ЭКЗАНТЕМ У ДЕТЕЙ

The lecture is devoted to the problem of differential diagnosis of infectious exanthemas in children. Information about differential-diagnostic sings of infectious and non-infectious exanthemas is present. Differential diagnosis is proposed on the basis of morphological elements identified in objective research. Presents possible infectious and non-infectious causes of rashes which are characterized by different primary (spot, papula, blister, knob, knot, bubble, abscess, bladder) and secondary (scale, erosion, ulcer) morphological elements.Приведены сведения о дифференциально-диагностических признаках инфекционных и неинфекционных экзантем. Дифференциальную диагностику предложено проводить на основании морфологических элементов, выявляемых при объективном исследовании. Представлены возможные инфекционные и неинфекционные причины сыпей, характеризующихся различными первичными (пятно, папула, волдырь, бугорок, узел, пузырек, гнойничок, пузырь) и вторичными (чешуйка, эрозия, язва) морфологическими элементами.

Evidence for spin-triplet superconducting correlations in metal-oxide heterostructures with non-collinear magnetization

Heterostructures composed of ferromagnetic La0.7Sr0.3MnO3, ferromagnetic SrRuO3, and superconducting YBa2Cu3Ox were studied experimentally. Structures of composition Au/La0.7Sr0.3MnO3/SrRuO3/YBa2Cu3Ox were prepared by pulsed laser deposition, and their high quality was confirmed by X-ray diffraction and reflectometry. A non-collinear magnetic state of the heterostructures was revealed by means of SQUID magnetometry and polarized neutron reflectometry. We have further observed superconducting currents in mesa-structures fabricated by deposition of a second superconducting Nb layer on top of the heterostructure, followed by patterning with photolithography and ion-beam etching. Josephson effects observed in these mesa-structures can be explained by the penetration of a triplet component of the superconducting order parameter into the magnetic layers.Comment: 10 pages, 6 figure

Magnetic proximity effect at interface between a cuprate superconductor and an oxide spin valve

Heterostructures consisting of a cuprate superconductor YBa2Cu3O7x and a ruthenate/manganite (SrRuO3/La0.7Sr0.3MnO3) spin valve have been studied by SQUID magnetometry, ferromagnetic resonances and neutron reflectometry. It was shown that due to the influence of magnetic proximity effect a magnetic moment is induced in the superconducting part of heterostructure and at the same time the magnetic moment is suppressed in the ferromagnetic spin valve. The experimental value of magnetization induced in the superconductor has the same order of magnitude with the calculations based on the induced magnetic moment of Cu atoms due to orbital reconstruction at the superconductor-ferromagnetic interface. It corresponds also to the model that takes into account the change in the density of states at a distance of order of the coherence length in the superconductor. The experimentally obtained characteristic length of penetration of the magnetic moment into superconductor exceeds the coherence length for cuprate superconductor. This fact points on the dominance of the mechanism of the induced magnetic moment of Cu atoms due to orbital reconstruction.Comment: 20 pages, 9 figure

ПОСТИНФЕКЦИОННЫЙ ОБЛИТЕРИРУЮЩИЙ БРОНХИОЛИТ У ДЕТЕЙ

Literature review describes the problem of bronchiolitis obliterans in children. The review analyzes modern date on etiology, morphological sings, clinical course, treatment and prognosis of diseas. The modern capabilities of diagnosis based on chest X-ray, computed tomography and pulmonary function testing are discussed. Обзор литературы посвящен проблеме постинфекционного облитерирующего бронхиолита у детей. В обзоре анализируются современные сведения об этиологии, морфологических особенностях, клиническом течении, терапии и прогнозе заболевания. Рассмотрены современные возможности диагностики на основе использования рентгенографии легких и компьютерной томографии и методик исследования функции внешнего дыхания.

СИНДРОМ МОЗГ–ЛЕГКИЕ–ЩИТОВИДНАЯ ЖЕЛЕЗА

Brain-lung-thyroid syndrome is a rare genetic disease characterized by pathology of the syndrome affected organs. This syndrome is based on mutations of the NKX2-1 gene, which encodes the thyroid transcription factor. Clinical manifestation of brain-lung-thyroid syndrome is characterized by a variable phenotype. The article presents the first Russian clinical observation of a patient with a genetically confirmed disease. Combination of such symptoms as motor development delay, ataxia, muscular hypotonia, recurrent lower airway infections, hypothyroidism helped to assume and then confirm brain-lung-thyroid syndrome by means of genetic analysis. The article also presents world literature findings (1998-2014) on clinical observations of this disease in respect of genetics, pathogenesis, pathomorphology, clinical pattern and therapy. Синдром мозг–легкие–щитовидная железа — редкое генетическое заболевание, проявляющееся поражением одноименных органов. В основе синдрома лежат мутации в гене NKX2-1, кодирующем фактор транскрипции щитовидной железы. Клиническая манифестация синдрома мозг–легкие–щитовидная железа характеризуется вариабельным фенотипом. В статье представлено первое в России клиническое наблюдение пациента с генетически подтвержденным заболеванием. Сочетание таких симптомов, как задержка моторного развития, атаксия, мышечная гипотония, рецидивирующие инфекции нижних дыхательных путей, гипотиреоз, позволило предположить, а затем подтвердить при генетическом исследовании синдром мозг–легкие–щитовидная железа. В статье также представлены данные мировой литературы (1998–2014 гг.), касающиеся клинических наблюдений этого заболевания ― генетики, патогенеза, патоморфологии, клинической картины, терапии.

АСИММЕТРИЧНАЯ ПЕРИФЛЕКСУРАЛЬНАЯ (ОДНОСТОРОННЯЯ ЛАТЕРОТОРАКАЛЬНАЯ) ЭКЗАНТЕМА

The article gives data about the epidemiology, possible etiology, clinical presentation and diagnosis of a rare infectious exanthematic disease of unknown etiology — asymmetric periflexural exanthem. Observation of the disease in a child of 22 months was presented. The peculiarity of this clinical observation is the spread the 59 Д. Ю. Овсянников, Е. А. Дегтярева. Асимметричная перифлексуральная (односторонняя латероторакальная) экзантема C M Y K 59 59 59 59 rash to the trunk and the contralateral side, and relapsing course of the disease.В статье приводятся сведения об эпидемиологии, возможной этиологии, клинике и диагностике редкого инфекционного экзантемного заболевания неизвестной этиологии — асимметричной перифлексуральной экзантемы. Представлено наблюдение заболевания у ребенка 1 года 10 мес. Особенностью данного клинического наблюдения является распространение высыпаний на туловище и контралатеральную сторону, а также рецидивирующее течение болезни

Electronic structure studies of BaFe2As2 by angle-resolved photoemission spectroscopy

We report high resolution angle-resolved photoemission spectroscopy (ARPES) studies of the electronic structure of BaFe$_2$As$_2$, which is one of the parent compounds of the Fe-pnictide superconductors. ARPES measurements have been performed at 20 K and 300 K, corresponding to the orthorhombic antiferromagnetic phase and the tetragonal paramagnetic phase, respectively. Photon energies between 30 and 175 eV and polarizations parallel and perpendicular to the scattering plane have been used. Measurements of the Fermi surface yield two hole pockets at the $\Gamma$-point and an electron pocket at each of the X-points. The topology of the pockets has been concluded from the dispersion of the spectral weight as a function of binding energy. Changes in the spectral weight at the Fermi level upon variation of the polarization of the incident photons yield important information on the orbital character of the states near the Fermi level. No differences in the electronic structure between 20 and 300 K could be resolved. The results are compared with density functional theory band structure calculations for the tetragonal paramagnetic phase.Comment: 11 pages, 5 figure