60 research outputs found

    Supergraph analysis of the one-loop divergences in 6D6D, N=(1,0){\cal N} = (1,0) and N=(1,1){\cal N} = (1,1) gauge theories

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    We study the one-loop effective action for 6D,6D, N=(1,0){\cal N}=(1,0) supersymmetric Yang--Mills (SYM) theory with hypermultiplets and 6D,6D, N=(1,1){\cal N}=(1,1) SYM theory as a subclass of the former, using the off-shell formulation of these theories in 6D,6D, N=(1,0){\cal N}=(1,0) harmonic superspace. We develop the corresponding supergraph technique and apply it to compute the one-loop divergences in the background field method ensuring the manifest gauge invariance. We calculate the two-point Green functions of the gauge superfield and the hypermultiplet, as well as the three-point gauge-hypermultipet Green function. Using these Green functions and exploiting gauge invariance of the theory, we find the full set of the off-shell one-loop divergent contributions, including the logarithmic and power ones. Our results precisely match with those obtained earlier in [1,2] within the proper time superfield method.Comment: 32 pages, 5 figure

    On the two-loop divergences of the 2-point hypermultiplet supergraphs for 6D6D, N=(1,1){\cal N} = (1,1) SYM theory

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    We consider 6D6D, N=(1,1){\cal N}=(1,1) supersymmetric Yang-Mills theory formulated in N=(1,0){\cal N}=(1,0) harmonic superspace and analyze the structure of the two-loop divergences in the hypermultiplet sector. Using the N=(1,0){\cal N}=(1,0) superfield background field method we study the two-point supergraphs with the hypermultiplet legs and prove that their total contribution to the divergent part of effective action vanishes off shell.Comment: 8 pages, 2 figure

    Anomalous Surface Compositions of Stoichiometric Mixed Oxide Compounds

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    The surface compositions of bulk mixed metal oxides stoichiometric vanadate and molybdate compounds have been systematically examined, for the first time, by combined synchroton-based depth-resolved XPS profile analysis, conventional XPS and LEIS spectroscopy. The outer surfaces of many, but not all, of the bulk mixed vanadates and molybdates tend to be enriched with surface VOx and MoOx species approaching monolayer coverage. Furthermore, this surface enrichment phenomenon can be dramatically enhanced in the presence of minor amount of alkali impurities. These new findings have significant implications for the fundamental understanding of how bulk mixed oxide materials function in numerous technical applications.Fil: Merzlikin, Sergiy V. . Ruhr-Universitt Bochum, Lehrstuhl fr Technische Chemie; AlemaniaFil: Tolkachev, Nikolay N. . Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry; RusiaFil: Briand, Laura Estefania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Strunskus,Thomas . Ruhr-Universitt Bochum, Lehrstuhl Physikalische Chemie; AlemaniaFil: Wöll, Christof. Ruhr-Universitt Bochum, Lehrstuhl Physikalische Chemie; AlemaniaFil: Wachs, Israel E.. Lehigh University Bethlehem, Department of Chemical Engineering, Operando Molecular Spectroscopy and Catalysis Laboratory; Estados UnidosFil: Grüenert, Wolfgang . Ruhr-Universitt Bochum, Lehrstuhl fr Technische Chemie; Alemani

    Anomalous Surface Compositions of Stoichiometric Mixed Oxide Compounds

    Get PDF
    The surface compositions of bulk mixed metal oxides stoichiometric vanadate and molybdate compounds have been systematically examined, for the first time, by combined synchroton-based depth-resolved XPS profile analysis, conventional XPS and LEIS spectroscopy. The outer surfaces of many, but not all, of the bulk mixed vanadates and molybdates tend to be enriched with surface VOx and MoOx species approaching monolayer coverage. Furthermore, this surface enrichment phenomenon can be dramatically enhanced in the presence of minor amount of alkali impurities. These new findings have significant implications for the fundamental understanding of how bulk mixed oxide materials function in numerous technical applications.Fil: Merzlikin, Sergiy V. . Ruhr-Universitt Bochum, Lehrstuhl fr Technische Chemie; AlemaniaFil: Tolkachev, Nikolay N. . Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry; RusiaFil: Briand, Laura Estefania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Strunskus,Thomas . Ruhr-Universitt Bochum, Lehrstuhl Physikalische Chemie; AlemaniaFil: Wöll, Christof. Ruhr-Universitt Bochum, Lehrstuhl Physikalische Chemie; AlemaniaFil: Wachs, Israel E.. Lehigh University Bethlehem, Department of Chemical Engineering, Operando Molecular Spectroscopy and Catalysis Laboratory; Estados UnidosFil: Grüenert, Wolfgang . Ruhr-Universitt Bochum, Lehrstuhl fr Technische Chemie; Alemani

    Anomalous Surface Compositions of Stoichiometric Mixed Oxide Compounds

    Get PDF
    The surface compositions of bulk mixed metal oxides stoichiometric vanadate and molybdate compounds have been systematically examined, for the first time, by combined synchroton-based depth-resolved XPS profile analysis, conventional XPS and LEIS spectroscopy. The outer surfaces of many, but not all, of the bulk mixed vanadates and molybdates tend to be enriched with surface VOx and MoOx species approaching monolayer coverage. Furthermore, this surface enrichment phenomenon can be dramatically enhanced in the presence of minor amount of alkali impurities. These new findings have significant implications for the fundamental understanding of how bulk mixed oxide materials function in numerous technical applications.Fil: Merzlikin, Sergiy V. . Ruhr-Universitt Bochum, Lehrstuhl fr Technische Chemie; AlemaniaFil: Tolkachev, Nikolay N. . Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry; RusiaFil: Briand, Laura Estefania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Strunskus,Thomas . Ruhr-Universitt Bochum, Lehrstuhl Physikalische Chemie; AlemaniaFil: Wöll, Christof. Ruhr-Universitt Bochum, Lehrstuhl Physikalische Chemie; AlemaniaFil: Wachs, Israel E.. Lehigh University Bethlehem, Department of Chemical Engineering, Operando Molecular Spectroscopy and Catalysis Laboratory; Estados UnidosFil: Grüenert, Wolfgang . Ruhr-Universitt Bochum, Lehrstuhl fr Technische Chemie; Alemani

    Biliary Microbiota, Gallstone Disease and Infection with Opisthorchis felineus.

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    BACKGROUND: There is increasing interest in the microbiome of the hepatobiliary system. This study investigated the influence of infection with the fish-borne liver fluke, Opisthorchis felineus on the biliary microbiome of residents of the Tomsk region of western Siberia. METHODOLOGY/PRINCIPAL FINDINGS: Samples of bile were provided by 56 study participants, half of who were infected with O. felineus, and all of who were diagnosed with gallstone disease. The microbiota of the bile was investigated using high throughput, Illumina-based sequencing targeting the prokaryotic 16S rRNA gene. About 2,797, discrete phylotypes of prokaryotes were detected. At the level of phylum, bile from participants with opisthorchiasis showed greater numbers of Synergistetes, Spirochaetes, Planctomycetes, TM7 and Verrucomicrobia. Numbers of \u3e 20 phylotypes differed in bile of the O. felineus-infected compared to non-infected participants, including presence of species of the genera Mycoplana, Cellulosimicrobium, Microlunatus and Phycicoccus, and the Archaeans genus, Halogeometricum, and increased numbers of Selenomonas, Bacteroides, Rothia, Leptotrichia, Lactobacillus, Treponema and Klebsiella. CONCLUSIONS/SIGNIFICANCE: Overall, infection with the liver fluke O. felineus modified the biliary microbiome, increasing abundance of bacterial and archaeal phylotypes

    Inverse Borrmann effect in photonic crystals

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    The Borrmann effect, which is related to the microscopic distribution of the electromagnetic field inside the primitive cell, is studied in photonic and magnetophotonic crystals. This effect, well-known in x-ray spectroscopy, is responsible for the enhancement or suppression of various linear and nonlinear optical effects when the incidence angle and/or the frequency change. It is shown that by design of the primitive cell this effect can be suppressed and even inverted
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