1,259 research outputs found

    Semi-infinite parabolic IC-sheaf

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    Let G be a connected reductive group, P its parabolic subgroup. We consider the parabolic semi-infinite category of sheaves on the affine Grassmanian of G and construct the parabolic version of the semi-infinite IC-sheaf of each orbit. We establish some of its properties and relate it to sheaves on the Drinfeld compactification of the moduli stack Bun_P of P-torsors on a curve. We also relate the parabolic semi-infinite IC-sheaf with the dual baby Verma object on the spectral side.Comment: 85

    Free amino acids of the blood and some organs in hypokinesia

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    The metabolic fund of amino acids of the blood and tissues of rats under hypokinesia was investigated. The content of free amino acids was determined for the liver, kidney, brain, and the skeletal and cardiac muscles after established periods of hypokinesia. It was found that the total content of free amino acids in the experimental animals was, on the average 19 percent lower than in the controls. The results of the quantity of individual compounds indicate that the level of some were reduced while others were increased. It was also found that there was an unequal content of individual amino acids in the different tissues

    Природа литовско-русской государственности в современных учебниках и пособиях по истории Украины для высшей школы

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    В статті поставлено за мету визначити, як подається природа литовсько-руської державності у період існування Великого Князівства Литовського, Руського і Жемайтійського в підручниках та навчальних посібниках для вищої школи України (виданих у період незалежності).The purpose of our work is to define how nature of Lithuanian-Russian state system in a period of Great Duchy of Lithuania, Rus and Zhemantiya in textbooks and manuals for higher school of Ukraine (given out in a period independence) is given. The author compares looks to the problem, which exist among the textbooks and manuals authors, on nature of the Ukrainian state system in composition of Great Great Duchy of Lithuania, Rus and Zhemantiya to set, whether some general for their authors conception was produced, to define, as far as simply each interprets the problem of these authors. The nature of the Lithuanian state system means reasons and methods of power establishment of Lithuanians on Rusian lands, essence and displays of submission of these lands central power.В статье поставлена цель определить, как подается природа литовско-русской государственности в период существования Великого Княжества Литовского, Русского и Жемайтийского в учебниках и учебных пособиях для высшей школы Украины (изданных в период независимости)

    Improving of the wear resistance of working parts agricultural machinery by the implementation of the effect of self-sharpening

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    The failure of the cutting elements of farm machinery is due to the blunting of cutting edges (increase of their radius) till the limit values. The most effective method for increasing the wear resistance of farm machinery is the realization of self-sharpening effect of the cutting elements. The testings took place in laboratory and field at the State Technical University of Kirovograd (Ukraine) in 2015. The technical equipment consists of the consolidated farmer plowshares by different methods as well as their samples, devicesfor measuring the wear resistance and thumbprint plowshares. It was determined the resistance to wear, the radius of curvature and the changing coefficient of the blades shape. The self-sharpening process was examined throughout the experiment.The results showed that the consolidated plowshares by the proposed technology (laser welding of the mixture (PS-14-60 + 6% В4С) compared to the traditional technology (volumetric heat treatment) have a blade radius 2.5 times lower, a wear 2.2 to 2.78 times lower and the self-sharpening process of the plowshares has been observed since the beginning of the wear until the time limit operation. The changing shape coefficient was respectively of 0.98 for the consolidated plowshares with alloy PS-14-60 + 6% B4C and 0.82 for those consolidated by volumetric heat treatment

    Диалог культур и проблема украинского евроазиатства в современной украинской историографии

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    В статті розглядаються передумови формування сучасної української історіографії проблеми діалогу культур та українського євразійства. Аналізуються погляди на те, що слід розуміти під Заходом і Сходом, під діалогом культур та проблемою українського євразійства. Виділяються основні концепції діалогу й напрямки в оцінках як окремих складових проблеми, так і її в цілому.In the article pre-conditions of forming of modern Ukrainian historiography of problem of cultural dialogue and Ukrainian Eurasianism are examined. Looks are analysed to that it follows to understand under the West and East, under the dialogue of cultures and problem of Ukrainian Eurasianism. Basic conceptions of dialogue and directions are distinguished in the estimations of both separate constituents of problem and her on the whole. Researchers of culture cooperations of Ukraine didn’t work out the same point of view about its civilization-spatial identity. Looks to the same aspects can be opposite. Both problems are comparatively scantily explored in Ukrainian historiography. The protracted period of soviet power have influenced negatively on research development, when a problem was examined. In modern Ukrainian historiography hasn’t terminological unity concerning that it follows to consider East, and that it follows to consider West. There isn’t methodological unity in that, what approach it follows to take for basis.В статье рассматриваются предпосылки формирования современной украинской историографии проблемы диалога культур и украинского евроазиатства. Анализируются взгляды на то, что следует подразумевать под. Западом и Востоком, под диалогом культур и проблемой украинского евроазиатства. Выделяются основные концепции диалога и направления в оценках как отдельных составляющих проблемы, так и ее в целом

    Nod1 signaling overcomes resistance of S. pneumoniae to opsonophagocytic killing

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    Airway infection by the Gram-positive pathogen Streptococcus pneumoniae (Sp) leads to recruitment of neutrophils but limited bacterial killing by these cells. Co-colonization by Sp and a Gram-negative species, Haemophilus influenzae (Hi), provides sufficient stimulus to induce neutrophil and complement-mediated clearance of Sp from the mucosal surface in a murine model. Products from Hi, but not Sp, also promote killing of Sp by ex vivo neutrophil-enriched peritoneal exudate cells. Here we identify the stimulus from Hi as its peptidoglycan. Enhancement of opsonophagocytic killing was facilitated by signaling through nucleotide-binding oligomerization domain-1 (Nod1), which is involved in recognition of γ-D-glutamyl-meso-diaminopimelic acid (meso-DAP) contained in cell walls of Hi but not Sp. Neutrophils from mice treated with Hi or compounds containing meso-DAP, including synthetic peptidoglycan fragments, showed increased Sp killing in a Nod1-dependent manner. Moreover, Nod1-/- mice showed reduced Hi-induced clearance of Sp during co-colonization. These observations offer insight into mechanisms of microbial competition and demonstrate the importance of Nod1 in neutrophil-mediated clearance of bacteria in vivo
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