136 research outputs found

    The essence and driving forces of competition

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    Π’ ΡΡ‚Π°Ρ‚ΡŒΠ΅ рассмотрСно понятиС конкурСнтоспособности прСдприятия, раскрыта Π΅Π΅ экономичСская ΡΡƒΡ‰Π½ΠΎΡΡ‚ΡŒ, выявлСны Ρ„Π°ΠΊΡ‚ΠΎΡ€Ρ‹ Π΄Π²ΠΈΠΆΡƒΡ‰ΠΈΡ… сил, Π²Π»ΠΈΡΡŽΡ‰ΠΈΠ΅ Π½Π° ΡƒΡ€ΠΎΠ²Π΅Π½ΡŒ ΠΊΠΎΠ½ΠΊΡƒΡ€Π΅Π½Ρ‚Π½ΠΎΠΉ Π±ΠΎΡ€ΡŒΠ±Ρ‹ прСдприятий.The article considers the concept of enterprise competitiveness discloses its economic essence, identifies the factors of driving forces that influence the level of competitiveness of enterprises

    Π Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° состава ΠΈ способа получСния пористого стСклокомпозита Π½Π° основС ΠΆΠΈΠ΄ΠΊΠΎΠ³ΠΎ стСкла

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    Π Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° состава ΠΈ способа получСния пористого стСклокомпозита Π½Π° основС ΠΆΠΈΠ΄ΠΊΠΎΠ³ΠΎ стСкла. Анализ характСристик исходных ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ², использованиС Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ… ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² исслСдования, Ρ‚Π°ΠΊΠΈΡ… ΠΊΠ°ΠΊ ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ вязкости ΠΈ модуля ΠΆΠΈΠ΄ΠΊΠΎΠ³ΠΎ стСкла, Π° Ρ‚Π°ΠΊ ΠΆΠ΅ Ρ€Π΅Π½Ρ‚Π³Π΅Π½ΠΎΡ„Π°Π·ΠΎΠ²Ρ‹ΠΉ Π°Π½Π°Π»ΠΈΠ· ΠΈ элСктронная микроскопия.Development of a composition and a method for producing a porous glass composite based on water glass. Analysis of the characteristics of raw materials, the use of various research methods, such as determination of the viscosity and modulus of liquid glass, as well as X-ray phase analysis and electron microscopy

    Identification of Novel F2-Isoprostane Metabolites by Specific UDP-Glucuronosyltransferases

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    UDP-glucuronosyltransferases (UGTs) catalyze the conjugation of glucuronic acid with endogenous and exogenous lipophilic small molecules to facilitate their inactivation and excretion from the body. This represents approximately 35 % of all phase II metabolic transformations. Fatty acids and their oxidized eicosanoid derivatives can be metabolized by UGTs. F2-isoprostanes (F2-IsoPs) are eicosanoids formed from the free radical oxidation of arachidonic acid. These molecules are potent vasoconstrictors and are widely used as biomarkers of endogenous oxidative damage. An increasing body of evidence demonstrates the efficacy of measuring the Ξ²-oxidation metabolites of F2-IsoPs rather than the unmetabolized F2-IsoPs to quantify oxidative damage in certain settings. Yet, the metabolism of F2-IsoPs is incompletely understood. This study sought to identify and characterize novel phase II metabolites of 15-F2t-IsoP and 5-epi-5-F2t-IsoP, two abundantly produced F2-IsoPs, in human liver microsomes (HLM). Utilizing liquid chromatography-mass spectrometry, we demonstrated that glucuronide conjugates are the major metabolites of these F2-IsoPs in HLM. Further, we showed that these molecules are metabolized by specific UGT isoforms. 15-F2t-IsoP is metabolized by UGT1A3, 1A9, and 2B7, while 5-epi-5-F2t-IsoP is metabolized by UGT1A7, 1A9, and 2B7. We identified, for the first time, the formation of intact glucuronide F2-IsoPs in human urine and showed that F2-IsoP glucuronidation is reduced in people supplemented with eicosapentaenoic and docosahexaenoic acids for 12 weeks. These studies demonstrate that endogenous F2-IsoP levels can be modified by factors other than redox mechanisms

    FACT - The First G-APD Cherenkov Telescope: Status and Results

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    The First G-APD Cherenkov telescope (FACT) is the first telescope using silicon photon detectors (G-APD aka. SiPM). It is built on the mount of the HEGRA CT3 telescope, still located at the Observatorio del Roque de los Muchachos, and it is successfully in operation since Oct. 2011. The use of Silicon devices promises a higher photon detection efficiency, more robustness and higher precision than photo-multiplier tubes. The FACT collaboration is investigating with which precision these devices can be operated on the long-term. Currently, the telescope is successfully operated from remote and robotic operation is under development. During the past months of operation, the foreseen monitoring program of the brightest known TeV blazars has been carried out, and first physics results have been obtained including a strong flare of Mrk501. An instantaneous flare alert system is already in a testing phase. This presentation will give an overview of the project and summarize its goals, status and first results

    Π†Π½Ρ„ΠΎΡ€ΠΌΠ°Ρ†Ρ–ΠΉΠ½Π° тСхнологія для класифікації Π½Π°ΡƒΠΊΠΎΠ²ΠΈΡ… тСкстів Π½Π° основі ΠΌΠ΅Ρ‚ΠΎΠ΄Ρƒ ΠΌΠΎΠ΄ΠΈΡ„Ρ–ΠΊΠΎΠ²Π°Π½ΠΎΡ— логістичної рСгрСсії

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    ΠžΠ±β€™Ρ”ΠΊΡ‚ дослідТСння: процСс класифікації Π½Π°ΡƒΠΊΠΎΠ²ΠΈΡ… тСкстів Ρ‚Π° ΠΏΡ€Π°ΠΊΡ‚ΠΈΡ‡Π½Π΅ використання Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³Ρ–ΠΉ ΠΎΠ±Ρ€ΠΎΠ±ΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΡ— ΠΌΠΎΠ²ΠΈ Π² освітніх Π΄ΠΎΠ΄Π°Ρ‚ΠΊΠ°Ρ…, Π· ΠΌΠ΅Ρ‚ΠΎΡŽ підвищСння СфСктивності ΠΎΡΠ²Ρ–Ρ‚Π½ΡŒΠΎΠ³ΠΎ процСсу. ΠŸΡ€Π΅Π΄ΠΌΠ΅Ρ‚ дослідТСння: ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈ, ΠΌΠΎΠ΄Π΅Π»Ρ– машинного навчання Ρ‚Π° ΠΎΠ±Ρ€ΠΎΠ±ΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΡŒΠΎΡ— ΠΌΠΎΠ²ΠΈ Ρƒ Π·Π°Π΄Π°Ρ‡Π°Ρ… класифікації Π½Π°ΡƒΠΊΠΎΠ²ΠΈΡ… тСкстів. ΠœΠ΅Ρ‚Π° ΠΌΠ°Π³Ρ–ΡΡ‚Π΅Ρ€ΡΡŒΠΊΠΎΡ— Ρ€ΠΎΠ±ΠΎΡ‚ΠΈ: вдосконалСння Ρ‚Π° ΠΏΡ€ΠΈΡˆΠ²ΠΈΠ΄ΡˆΠ΅Π½Π½Ρ процСсу класифікації тСкстів Π· допомогою ΠΌΠΎΠ΄Π΅Π»Ρ– логістичної рСгрСсії, Π· ΠΌΠ΅Ρ‚ΠΎΡŽ застосування Ρ—Ρ— Ρƒ освітніх Π΄ΠΎΠ΄Π°Ρ‚ΠΊΠ°Ρ… для покращСння ΠΎΡΠ²Ρ–Ρ‚Π½ΡŒΠΎΠ³ΠΎ процСсу. ΠœΠ΅Ρ‚ΠΎΠ΄ΠΈ дослідТСння. Для створСння Ρ€Π΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°Ρ†Ρ–ΠΉΠ½ΠΎΠ³ΠΎ Ρ‚Π° Π½Π°Π²Ρ‡Π°Π»ΡŒΠ½ΠΎΠ³ΠΎ асистСнта Π±ΡƒΠ»ΠΈ використані засоби Ρ‚Π° ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈ машинного навчання, Ρ‚Π΅ΠΎΡ€Ρ–Ρ— ΠΌΠ½ΠΎΠΆΠΈΠ½, Π»Ρ–Π½Π΅ΠΉΠ½ΠΎΡ— Π°Π»Π³Π΅Π±Ρ€ΠΈ ΠΉ ΠΎΠ±Ρ€ΠΎΠ±ΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΡ— ΠΌΠΎΠ²ΠΈ. Наукова Π½ΠΎΠ²ΠΈΠ·Π½Π° полягає Ρƒ Ρ‚ΠΎΠΌΡƒ, Ρ‰ΠΎ вдосконалСно Ρ‚Π° Ρ€ΠΎΠ·ΡˆΠΈΡ€Π΅Π½ΠΎ моТливості ΠΌΠ΅Ρ‚ΠΎΠ΄Ρƒ логістичної рСгрСсії Π½Π° основі комбінування ΠΉΠΎΠ³ΠΎ Π· ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ ранТування, Ρ‰ΠΎ Π² Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ– Π΄ΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΎ використати ΠΌΠ΅Ρ‚ΠΎΠ΄ логістичної рСгрСсії для Π½Π°Π²Ρ‡Π°Π»ΡŒΠ½ΠΎΠ³ΠΎ асистСнті. ΠŸΡ€Π°ΠΊΡ‚ΠΈΡ‡Π½Π° Ρ†Ρ–Π½Π½Ρ–ΡΡ‚ΡŒ полягає Ρƒ Ρ‚ΠΎΠΌΡƒ, Ρ‰ΠΎ Π² Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ– Ρ€ΠΎΠ±ΠΎΡ‚ΠΈ, Π±ΡƒΠ»ΠΎ створСно ΠΏΡ€ΠΎΡ‚ΠΎΡ‚ΠΈΠΏ Π½Π°Π²Ρ‡Π°Π»ΡŒΠ½ΠΎΠ³ΠΎ асистСнта, Ρ‰ΠΎ використовує скомбіновану Π· ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ ранТування модСль логістичної рСгрСсії для класифікації тСкстів. Використані ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈ Ρ‚Π° ΠΏΡ–Π΄Ρ…ΠΎΠ΄ΠΈ Ρƒ ΠΏΡ€ΠΎΡ‚ΠΎΡ‚ΠΈΠΏΡ– ΠΌΠΎΠΆΡƒΡ‚ΡŒ Π·Π°ΡΡ‚ΠΎΡΠΎΠ²ΡƒΠ²Π°Ρ‚ΠΈΡΡŒ як ΠΏΡ€ΠΈ Ρ€ΠΎΠ·Ρ€ΠΎΠ±Ρ†Ρ– Β«Ρ–Π½Ρ‚Π΅Π»Π΅ΠΊΡ‚ΡƒΠ°Π»ΡŒΠ½ΠΈΡ…Β» Π½Π°Π²Ρ‡Π°Π»ΡŒΠ½ΠΈΡ… систСм, Ρ‚Π°ΠΊ ΠΉ Π² ΠΏΡ€Π°ΠΊΡ‚ΠΈΡ†Ρ– викладання дисциплін, пов’язаних Π· ΠΎΠ±Ρ€ΠΎΠ±ΠΊΠΎΡŽ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΡ— ΠΌΠΎΠ²ΠΈ

    Humoral immunity in dually vaccinated SARS-CoV-2-naΓ―ve individuals and in booster-vaccinated COVID-19 convalescent subjects

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    Background The immune response to COVID-19-vaccination differs between naΓ―ve vaccinees and those who were previously infected with SARS-CoV-2. Longitudinal quantitative and qualitative serological differences in these two distinct immunological subgroups in response to vaccination are currently not well studied. Methods We investigate a cohort of SARS-CoV-2-naΓ―ve and COVID-19-convalescent individuals immediately after vaccination and 6 months later. We use different enzyme-linked immunosorbent assay (ELISA) variants and a surrogate virus neutralization test (sVNT) to measure IgG serum titers, IgA serum reactivity, IgG serum avidity and neutralization capacity by ACE2 receptor competition. Results Anti-receptor-binding domain (RBD) antibody titers decline over time in dually vaccinated COVID-19 naΓ―ves whereas titers in single dose vaccinated COVID-19 convalescents are higher and more durable. Similarly, antibody avidity is considerably higher among boosted COVID-19 convalescent subjects as compared to dually vaccinated COVID-19-naΓ―ve subjects. Furthermore, sera from boosted convalescents inhibited the binding of spike-protein to ACE2 more efficiently than sera from dually vaccinated COVID-19-naΓ―ve subjects. Conclusions Long-term humoral immunity differs substantially between dually vaccinated SARS-CoV-2-naΓ―ve and COVID-19-convalescent individuals. Booster vaccination after COVID-19 induces a more durable humoral immune response in terms of magnitude and quality as compared to two-dose vaccination in a SARS-CoV-2-naΓ―ve background
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