2,232 research outputs found

    The Human Oral Microbiome Database: a web accessible resource for investigating oral microbe taxonomic and genomic information

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    The human oral microbiome is the most studied human microflora, but 53% of the species have not yet been validly named and 35% remain uncultivated. The uncultivated taxa are known primarily from 16S rRNA sequence information. Sequence information tied solely to obscure isolate or clone numbers, and usually lacking accurate phylogenetic placement, is a major impediment to working with human oral microbiome data. The goal of creating the Human Oral Microbiome Database (HOMD) is to provide the scientific community with a body site-specific comprehensive database for the more than 600 prokaryote species that are present in the human oral cavity based on a curated 16S rRNA gene-based provisional naming scheme. Currently, two primary types of information are provided in HOMD—taxonomic and genomic. Named oral species and taxa identified from 16S rRNA gene sequence analysis of oral isolates and cloning studies were placed into defined 16S rRNA phylotypes and each given unique Human Oral Taxon (HOT) number. The HOT interlinks phenotypic, phylogenetic, genomic, clinical and bibliographic information for each taxon. A BLAST search tool is provided to match user 16S rRNA gene sequences to a curated, full length, 16S rRNA gene reference data set. For genomic analysis, HOMD provides comprehensive set of analysis tools and maintains frequently updated annotations for all the human oral microbial genomes that have been sequenced and publicly released. Oral bacterial genome sequences, determined as part of the Human Microbiome Project, are being added to the HOMD as they become available. We provide HOMD as a conceptual model for the presentation of microbiome data for other human body sites

    Impedance spectroscopic investigation of a Rh/YSZ catalyst under polarization

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    Electrochemical impedance spectra at 450-600 °C and PO2=0.5{P_{{\rm{O}}_{\rm{2}} } = 0.5} kPa of a rhodium catalyst interfaced with yttria-stabilized-zirconia (Rh/YSZ) were compared with a model based on the mechanism of electrochemical promotion. In the proposed equivalent electric circuit, existence of an "effective” double layer at the gas-exposed catalyst surface and its potential-controlled modification via diffusion of oxygen ions between the O2− conducting solid electrolyte support (YSZ) and the catalyst are represented by two additional elements: adsorption capacitance and Warburg impedance. Under positive polarization, the adsorption capacitance increases dramatically indicating reinforcement of the "effective” double layer at the catalyst/gas interface, in agreement with the observation known from electrochemical promotion practice that positive polarization of a rhodium electrode leads to rhodium oxide reduction, hence, to dramatic increase in catalytic reaction rat

    Analysis of the residues in the single treasury account

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    Розглянуто в динаміці показники ЄКР, проаналізовано залишки Визначено значення функціонування єдиного казначейського рахунку (ЄКР) для ефективної діяльності системи казначейства, який концентрує фінансові ресурси. Це призводить до прискорення процесу і збільшення оборотності бюджетних коштів, ефективності їх використання, але і до доступності інформації про касові виплати за рахунок засобів державного бюджету.Рассмотрены в динамике показатели ЕКС, проанализированы остатки. Определено значение функционирования единого казначейского счета (ЕКС) для эффективной деятельности системы казначейства, который концентрирует финансовые ресурсы. Это приводит к ускорению процесса и увеличение оборачиваемости бюджетных средств, эффективности их использования, но и к доступности информации о кассовые выплаты за счет средств государственного бюджета.The indexes of joint treasury account are considered, the analysis of tailings of budgetary facilities is done. Certainly value of functioning of the unique treasury account for effective activity of the system of treasury, which concentrates financial resources. It brings to the acceleration of process an increase over of circulating of budgetary facilities, efficiency of their use, but also to availability of information about cash payments due to facilities of the state budget

    Electrochemical modification of the catalytic activity of TiO2/YSZ supported rhodium films

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    The electrochemical activation of ethylene oxidation was studied over rhodium catalysts of different thickness (40, 100 and 160 nm) sputtered on top of a thin layer of TiO2 deposited on YSZ. The strong relationship between catalytic activity and oxidation state of rhodium was confirmed. Under open-circuit operation the catalyst potential appears as a suitable indicator of the surface oxidation state of rhodium allowing a prediction of the catalytic behavior from solid electrolyte potentiometric measurements. Under closed-circuit conditions the catalyst potential was used as a tool to tune the catalytic activity of rhodium which showed increasing promotional efficiency with decreasing catalyst film thicknes

    The pension system of ukraine and European integration processes

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    У статті розглянуті питання щодо реформування системи пенсійного забезпечення направлених на євроінтеграцію. Розглянуто детально сучасний стан функціонування системи пенсійного забезпечення. Проаналізований стан податкового навантаження, що впливає на систему пенсійного забезпечення та розглянутий зарубіжний досвід. Запропоновані моделі управління коштами Пенсійного фонду України через фактори. Надані прогнози з 2017 до 2022 роки щодо функціонування накопичувальної системи пенсійного забезпечення. Надані пропозиції щодо подальшого реформування системи пенсійного забезпечення в Україні.В статье рассмотрены вопросы по реформированию системы пенсионного обеспечения направленные на евроинтеграцию. Рассмотрено детально состояние функционирование системы пенсионного обеспечения. Проанализировано состояние налоговой загрузки, которое влияет на систему пенсионного обеспечения и рассмотрен зарубежный опыт. Предложены модели управления средствами Пенсионного фонда Украины через факторы. Представлены прогнозы с 2017 по 2022 годы по функционированию накопительной системы пенсионного обеспечения. Представлены предложения по дальнейшему реформированию системы пенсионного обеспечения.This article is the questions on the reform of the pension system aimed at European integration. We consider in detail the current state of the system of pensions. The state tax burden on the pension system and considered international experience. The models of management of the Pension Fund of Ukraine through factors. Available forecasts from 2017 to 2022 in respect of a funded pension system. The proposals for further reform of the pension system in Ukraine

    How do new media contribute to image-making? The case of personalized web-communications on runet

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    The paper discusses the impact of personalization on image-making activity through new media on Russian Web segment. The authors compare the target audiences and the content of various mass media and evaluate their imagemaking efficiency. The article concludes on perspectives of social networking media in making image of PR-subjects in terms of personalizationyesBelgorod State Universit

    Lithologic-facies and paleogeographic features of Mid-Upper Jurassic oil-gas bearing sediments in Nurolsk depression (Western Siberia)

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    Bathonian-Callovian-Oxfordian sedimentation environment reconstruction in SE Nurolsk depression, Western Siberia has been described. Paleogeographic and litho-geochemical features of sediments, numerous plant remains and ichnofossils indicated the fact that this territory during the Naunaksk suite formation was the transition in-situ sedimentogenesis. Based on the integrated research data, the potential litho-facies were identified in the Mid-Upper sediments within Nurolsk depression, Western Siberia

    Concurrent thermochemoradiotherapy for brain high-grade glioma

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    Despite the achievements in the current strategies for treatment, the prognosis in malignant glioma patients remains unsatisfactory. Hyperthermia is currently considered to be the most effective and universal modifier of radiotherapy and chemotherapy. Preliminary treatment outcomes for 28 patients with newly diagnosed (23) and recurrent (5) high-grade gliomas were presented. All the patients received multimodality treatment including surgery, thermoche-moradiotherapy followed by 4 cycles of adjuvant chemotherapy. All the patients endured thermochemoradiotherapy well. A complication, limited skin burn (II stage), was diagnosed in two cases and treated conservatively without treatment interruption. A month after thermochemoradiotherapy the results were as follows: complete regression was achieved in 4 cases, partial regression in 4 cases, stable disease in 14 cases and disease progression in 6 cases (one of them is pseudo-progression). After completing the adjuvant chemotherapy 2 more patients demonstrated complete response and 1 patient had disease progression. Introduction of local hyperthermia in multimodal therapy of malignant glioma does not impair the combined modality treatment tolerability of patients with malignant gliomas. A small number of studied patients and short follow-up time do not allow making reliable conclusions about the impact of local hyperthermia on the treatment outcomes; however, there is a tendency towards the increase in disease-free survival in the patients with newly diagnosed malignant gliomas

    The hepatoadrenal syndrome: A common yet unrecognized clinical condition

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    Objective: Adrenal failure is common in critically ill patients, particularly those with sepsis. As liver failure and sepsis are both associated with increased circulating levels of endotoxin and proinflammatory mediators and reduced levels of apoprotein-1/ high-density lipoprotein, we postulated that adrenal failure may be common in patients with liver disease. Design: Clinical study. Setting: Liver transplant intensive care unit. Patients: The study cohort included 340 patients with liver disease. Interventions: Based on preliminary observational data, all patients admitted to our 28-bed liver transplant intensive care unit (LTICU) undergo adrenal function testing. An honest broker system was used to extract clinical, hemodynamic, medication, and laboratory data on patients admitted to the LTICU from March 2002 to March 2004. A random (stress) cortisol level <20 μg/dL in a highly stressed patient (respiratory failure, hypotension) was used to diagnose adrenal insufficiency. In all other patients, a random cortisol level <15 μg/dL or a 30-min level <20 μg/dL post-low-dose (1 μg) cosyntropin was considered diagnostic of adrenal insufficiency. Patients were grouped as follows: a) chronic liver failure; b) fulminant hepatic failure; c) patients immediately status post-orthotopic liver transplantation receiving a steroid-free protocol of immunosuppression; and d) patients status post-remote liver transplant (≥6 months). The decision to treat patients with stress doses of hydrocortisone was at the discretion of the treating intensivist and transplant surgeon. Measurements and Main Results: Two-hundred and forty-five (72%) patients met our criteria for adrenal insufficiency (the hepatoadrenal syndrome). Eight (33%) patients with fulminant hepatic failure, 97 (66%) patients with chronic liver disease, 31(61%) patients with a remote history of liver transplantation, and 109 (92%) patients who had undergone liver transplantation under steroid-free immunosuppression were diagnosed with adrenal insufficiency. The high-density lipoprotein level at the time of adrenal testing was the only variable predictive of adrenal insufficiency (p < .0001). In vasopressor-dependent patients with adrenal insufficiency, treatment with hydrocortisone was associated with a significant reduction (p = .02) in the dose of norepinephrine at 24 hrs, whereas the dose of norepinephrine was significantly higher (p = .04) in those patients with adrenal failure not treated with hydrocortisone. In vasopressor-dependent patients without adrenal insufficiency, treatment with hydrocortisone did not affect vasopressor dose at 24 hrs. One hundred and forty-one patients (26.4%) died during their hospitalization. The baseline serum cortisol was 18.8 ± 16.2 μg/dL in the nonsurvivors compared with 13.0 ± 11.8 μg/dL in the survivors (p < .001). Of those patients with adrenal failure who were treated with glucocorticoids, the mortality rate was 26% compared with 46% (p = .002) in those who were not treated. In those patients receiving vasopressor agents at the time of adrenal testing, the baseline cortisol was 10.0 ± 4.8 μg/dL in those with adrenal insufficiency compared with 35.6 ± 21.2 μg/dL in those with normal adrenal function. Vasopressor-dependent patients who did not have adrenal failure had a mortality rate of 75%. Conclusions: Patients with liver failure and patients post-liver transplantation have an exceedingly high incidence of adrenal failure, which may be pathophysiologically related to low levels of high-density lipoprotein. Treatment of patients with adrenal failure may improve outcome. High baseline serum cortisol levels may be a maker of disease severity and portend a poor prognosis. Copyright © 2005 by the Society of Critical Care Medicine and Lippincott Williams & Wilkins

    Excitonic effects on the two-color coherent control of interband transitions in bulk semiconductors

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    Quantum interference between one- and two-photon absorption pathways allows coherent control of interband transitions in unbiased bulk semiconductors; carrier population, carrier spin polarization, photocurrent injection, and spin current injection may all be controlled. We extend the theory of these processes to include the electron-hole interaction. Our focus is on photon energies that excite carriers above the band edge, but close enough to it so that transition amplitudes based on low order expansions in k\mathbf{k} are applicable; both allowed-allowed and allowed-forbidden two-photon transition amplitudes are included. Analytic solutions are obtained using the effective mass theory of Wannier excitons; degenerate bands are accounted for, but envelope-hole coupling is neglected. We find a Coulomb enhancement of two-color coherent control process, and relate it to the Coulomb enhancements of one- and two-photon absorption. In addition, we find a frequency dependent phase shift in the dependence of photocurrent and spin current on the optical phases. The phase shift decreases monotonically from π/2\pi /2 at the band edge to 0 over an energy range governed by the exciton binding energy. It is the difference between the partial wave phase shifts of the electron-hole envelope function reached by one- and two-photon pathways.Comment: 31 pages, 4 figures, to be published in Phys. Rev.
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