Disseminated Mycobacterium genavense infection in an otherwise healthy child: a clinical case and literature review

This paper presents the first clinical case of combined pulmonary and abdominal M. genavense infection in an otherwise healthy, immunocompetent child with an early treatment response and full recovery. The favorable outcome was determined by rapid microbiological diagnosis using up-to-date diagnostic methods followed by targeted antimicrobial therapy

<i>Paludisphaera borealis</i> gen. nov., sp. nov., a hydrolytic planctomycete from northern wetlands, and proposal of <i>Isosphaeraceae</i> fam. nov.

Two isolates of aerobic, budding, pink-pigmented bacteria, designated strains PX4T and PT1, were isolated from a boreal Sphagnum peat bog and a forested tundra wetland. Cells of these strains were non-motile spheres that occurred singly or in short chains. Novel isolates were capable of growth at pH values between 3.5 and 6.5 (optimum at pH?5.0–5.5) and at temperatures between 6 and 30?°C (optimum at 15–25?°C). Most sugars and a number of polysaccharides including pectin, xylan, lichenin and Phytagel were used as growth substrates. The major fatty acids were C16?:?0, C18?:?1?9 and C18?:?0; the major polar lipids were phosphocholine and trimethylornithine. The quinone was menaquinone-6, and the G+C content of the DNA was 66?mol%. Strains PX4T and PT1 were members of the order Planctomycetales and displayed 93–94?% 16S rRNA gene sequence similarity to Aquisphaera giovannonii, 91–92?% to species of the genus Singulisphaera and 90–91?% to Isosphaera pallida. The two novel strains, however, differed from members of these genera by cell morphology, substrate utilization pattern and a number of physiological characteristics. Based on these data, the novel isolates should be considered as representing a novel genus and species of planctomycetes, for which the name Paludisphaera borealis gen. nov., sp. nov., is proposed. The type strain is PX4T (?=?DSM 28747T?=?VKM B-2904T). We also suggest the establishment of a novel family, Isosphaeraceae fam. nov., to accommodate stalk-free planctomycetes with spherical cells, which can be assembled in short chains, long filaments or shapeless aggregates. This family includes the genera Isosphaera, Aquisphaera, Singulisphaera and Paludisphaer

Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum

Optical bound states in the continuum (BICs) provide a way to engineer very narrow resonances in photonic crystals. The extended interaction time in these systems is particularly promising for the enhancement of nonlinear optical processes and the development of the next generation of active optical devices. However, the achievable interaction strength is limited by the purely photonic character of optical BICs. Here, we mix the optical BIC in a photonic crystal slab with excitons in the atomically thin semiconductor MoSe2 to form nonlinear exciton-polaritons with a Rabi splitting of 27 meV, exhibiting large interaction-induced spectral blueshifts. The asymptotic BIC-like suppression of polariton radiation into the far field toward the BIC wavevector, in combination with effective reduction of the excitonic disorder through motional narrowing, results in small polariton linewidths below 3 meV. Together with a strongly wavevector-dependent Q-factor, this provides for the enhancement and control of polariton–polariton interactions and the resulting nonlinear optical effects, paving the way toward tuneable BIC-based polaritonic devices for sensing, lasing, and nonlinear optics

Geochemistry of Iron in Organogenic Water of Western Siberia, Russia

AbstractIn the central part of Western Siberia a study of the chemical composition of bog water was conducted. Bog water contains high concentrations of iron and organic matter. By means of thermodynamic methods were calculate the equilibrium of bog water with the major minerals. It was shown, that bog water is in equilibrium with kaolinite, vivianite, α-apatite. Primary aluminium minerals are undersaturated and release iron and other elements, to which a bog water are not at equilibrium and which is dissolve actively

Skyrme-Einstein closed cosmic chiral strings

Within the theory of general relativity, the configuration of a closed string (vortex) characterized by a topological charge of the degree type is described for the Skyrme-Einstein SU (2) chiral model. In the approximation of a large vortex-closure radius (a), a solution to equations of motion is obtained, along with estimates for the vortex energy and radius. © 2007 Pleiades Publishing, Ltd

NEW CHALLENGES TO EUROPEAN UNION MIGRATION POLICY IN CONTEXT OF GLOBALIZATION

The problem of regulation of migration policy excites the minds of politicians and researchers for decades, however, over the past five years, the migration issue has not left aside almost any country. The political situation in Asia and Africa has significantly changed the life of Europe. Donor countries, like recipient countries, have found themselves in the cycle of modern migration flows. International migration continues to cover the country with new waves. The inability to limit migration pressures exacerbates international relations among member states and creates differences among leaders who block quick and effective solutions for the return of illegal migrants to their homeland. According to the authors, in order to overcome the migration crisis effectively, it is necessary first of all to take collective actions that will contribute to overcoming contradictions. The relevance of the presented study is not in doubt, due to the fact that the problem of finding effective tools for regulating migration processes does not cease to concern leading politicians and does not leave indifferent the world scientific community

In search of the archetype: From the mother archetype to the archetype of Baba Yaga

Archetypes express themselves in various forms and sources, but many of them can be traced in folk tales. This article describes the most significant symbols and images that reveal the deepest meaning and significance of the Mother archetype in Russian folk culture. © 2019, ZRC SAZU, Zalozba ZRC. All rights reserved

INFORMATION TECHNOLOGIES AS GROWTH FACTOR IN POLITICAL STABILITY

The paper dwells on the role of information technologies in the development of e-democracy, e-government and document management. As of today, the problem of information society development poses a rather topical issue as never before. Global quarantine and lockdowns prompted a necessary breakthrough in information technologies. During the pandemic, the number of Internet users has grown along with the involvement of general public in information technologies. The authors consider information society a key factor of government steady development and political processes stability. Special attention is paid to the possibilities of e-democracy and e-government. E-government in the modern world has an impact on a large number of processes in every modern state. From the level of its development, the degree of involvement of citizens in it, we can draw conclusions about the development of the state as a whole. The authors analyze the potential of modern information technologies to influence the development of democratic institutions of society and the state