368 research outputs found

    To the problem about the origin of lunar maria and continents (Moessbauer investigations)

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    A comparative study of Mossbauer spectra of regolith returned by the Luna 16 and Luna 20 spacecraft is presented. The Mossbauer spectra of the mare regolith differs significantly for all fractions from the spectra for the same fractions of continental regolith. The total quantity of iron is 1.85 times greater in the mare regolith. There is 2.4 times less olivine in the mare region than in the continental region. The pyroxene component of the mare regolith is less homogeneous in composition (contains more augite and glass) and is present in larger quantities. Ilmenite was found only in the mare regolith. In the continental region, the predominant titanium-containing phase is ulvospinel. The mare regolith contains more metallic iron, which is more finely dispersed and contains less nickel. Troilite is found in the maria region. Based on these differences, it is concluded that the formation of continental rocks occurred at an earlier stage of crystallization from the melt and at higher temperatures and higher partial pressures of oxygen. The mare basalts crystallized from a more reduced magma, apparently in a later process

    Coexistence of multiple sclerosis and brain tumours: Case report and review

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    In the present report, a review of the literature on the combination of multiple sclerosis and brain tumours is performed. Additionally, the frequency of such combination, possible etiopathogenetic mechanisms, current diagnostic criteria and treatment approaches are reviewed. Furthermore, the case of a 30-year-old man with multiple sclerosis and anaplastic astrocytoma of the right temporal lobe is described in detail. Specifically, the patient underwent a series of tests, including laboratory analyses of blood and cerebrospinal fluid, brain MRI in various modes, MR spectroscopy and excised tumour’s pathohistological and immunohistochemical examination. Results of the tests are reported here. A staged examination and treatment of the patient allowed the researchers to perform a correct diagnosis and obtain a satisfactory functional outcome

    Revision of Cerinomyces (Dacrymycetes, Basidiomycota) with notes on morphologically and historically related taxa

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    Publisher Copyright: © 2021 The AuthorsCerinomyces (Dacrymycetes, Basidiomycota) is a genus traditionally defined by corticioid basidiocarps, in contrast to the rest of the class, which is characterized by gelatinous ones. In the traditional circumscription the genus is polyphyletic, and the monotypic family Cerinomycetaceae is paraphyletic. Aiming for a more concise delimitation, we revise Cerinomyces s.l. with a novel phylogeny based on sequences of nrDNA (SSU, ITS, LSU) and protein-coding genes (RPB1, RPB2, TEF1-α). We establish that monophyletic Cerinomyces s.s. is best characterized not by the corticioid morphology, but by a combination of traits: hyphal clamps, predominantly aseptate thin-walled basidiospores, and low content of carotenoid pigments. In our updated definition, Cerinomyces s.s. encompasses five well-supported phylogenetic clades divided into two morphological groups: (i-iii) taxa with arid corticioid basidiocarps, including the generic type C. pallidus; and (iv-v) newly introduced members with gelatinous basidiocarps, like Dacrymyces enatus and D. tortus. The remaining corticioid species of Cerinomyces s.l. are morphologically distinct and belong to the Dacrymycetaceae: our analysis places the carotenoid-rich Cerinomyces canadensis close to Femsjonia, and we transfer the clamps-lacking C. grandinioides group to Dacrymyces. In addition, we address genera related to Cerinomyces s.l. historically and morphologically, such as Ceracea, Dacryonaema and Unilacryma. Overall, we describe twenty-four new species and propose nine new combinations in both Cerinomycetaceae and Dacrymycetaceae.Peer reviewe

    Three very young HgMn stars in the Orion OB1 Association

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    We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and BD-0 984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the youngest cluster with known HgMn star members. This places an observational upper limit on the time scale needed to produce the chemical peculiarities seen in mercury-manganese stars, which should help in the search for the cause or causes of the peculiar abundances in HgMn and other chemically peculiar upper main sequence stars.Comment: 8 pages including 1 figure. To appear in Astrophysical Journal Letter

    Хірургічне лікування хордоми крижів

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    Мета. Аналіз хірургічної техніки, результатів хірургічного та комбінованого лікування хордоми крижів. Матеріали і методи. У 28 хворих з хордомами крижів проаналізовано симптоми захворювання та їх динаміку, цін- ність методів нейровізуалізації, особливості патогістологічної картини, хірургічну техніку, ефективність променевої те- рапії та віддалені результати лікування. Результати. Серед клінічних проявів хордоми крижів домінував больовий синдром. Середня тривалість анамнезу ста- новила близько одного року. Хірургічну резекцію пухлини через задній доступ виконали 18 хворим, через комбінова- ний – 9 хворим. Видалення пухлин оцінене як радикальне у 21 хворого, часткове – у 7 хворих. У післяопераційному періоді всім хворим проведено курс променевої терапії на лінійному прискорювачі. Протягом 5 років у 26 хворих ви- ник рецидив хордоми. Повторне оперативне втручання виконали 22 хворим. Висновки. Лікування хордом потребує комплексного підходу. Методом вибору залишається виконання радикального хірургічного втручання, що можливо не у всіх хворих

    Semantic Typology Pandemic Vocabulary: Covid Neologisms in English, French and German

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    Neologisms that appeared under the influence of the pandemic of a new coronavirus infection Covid-19 are considered, based on the material of English, French and German languages. The basis of the study is formed by neologisms collected by continuous sampling from available lexicographic sources and foreign language Internet resources. The relevance of this work is confirmed by the rapid growth of neologisms in all the languages under consideration. The novelty of the study lies in a comparative approach to the analysis of nomination processes and in determining the dominant areas of semantic attraction in these linguistic cultures. The elements that have shown the greatest productivity and stable functioning are singled out. The author’s classification of covid neologisms is proposed. The question is raised about the susceptibility of these languages to new realities, their productivity in the process of responding to changes in various spheres of society. It is concluded that the number of English neologisms prevails over the corresponding units in French and German. It is confirmed that the structure of the lexico-semantic groups identified during the analysis is heterogeneous and in some cases has a lacunar character. It is suggested that the reason for this may be both the specificity of the word formation of languages, and the peculiarities of the mentality inherent in a particular linguocultural community

    The Role of Biologically Active Aqueous Humor Molecules of the Anterior Chamber and Lacrimal Fluid in the Implementation of the Hypotensive Effect of Non-Penetrating Deep Sclerectomy

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    To date, the factors affecting the course of the reparative process after non-penetrating deep sclerectomy (NPDS) have not been fully determined. There is no systematic information about the regulatory role of the cytokines TGF-β, IL-6, IL-8 and MMP-9, VEGF A 121 and 165 in the formation mechanisms of the newly created pathways consistency of intraocular aqueous humor outflow.Purpose. To determine possible ways of impact of biologically active aqueous humor molecules of the anterior chamber and lacrimal fluid on the hypotensive effect of non-penetrating deep sclerectomy.Methods. A prospective study of 65 patients with open-angle glaucoma before and 12 months after NPDS and 22 patients without eye hydrodynamic disorders with the determination of the initial concentrations of biologically active molecules in the lacrimal fluid and aqueous humor of the anterior chamber. Twelve months after NPDS all patients were divided into three groups, depending on the hypotensive effect of the operation, according to the criteria.Results. Multivariate discriminant analysis showed the greatest inter-group differences, calculated by the square of the Mahalanobis distance, between group 3 with no hypotensive effect of NPDS and the control group (R2 = 8.48, p = 0.001). The most informative features that determine the differences between the 4 groups in the total population, calculated according to the Fischer F-test, were MMP-9 (F = 14.7, p = 0.001) and TGF-β (F = 7.08, p = 0.001) in the aqueous humor of the anterior chamber. In pairwise comparison of groups 1 and 2, the maximum level of significance according to the F-criterion was characteristic of the level of tear IL-6 (F = 21.25, p = 0.001), with approximately equal degree – IL-8 (F = 7.85, p = 0.001) and VEGF (F = 7.12, p = 0.001), to a lesser extent TGF of aqueous humor (F = 4.43, p = 0.001) and MMR-9 (F = 2.23, p = 0.001). Between groups 1–3, the maximum differences according to the Fisher criterion were observed in the IL-8 (F = 20.99, p = 0.001), TGF (F = 8.75, p = 0.001) and to a lesser extent – TGF (F = 5.83, p = 0.001).Conclusion. The analysis of the obtained data showed the decisive role of the imbalance of proinflammatory cytokines, signaling proteins with prolymphoangiogenic activity, and MMP-9 in the aqueous humor of the anterior chamber, as well as in the initial state of the lacrimal fluid in the postoperative healing processes after NPDS

    Использование извлеченных данных из социальных сетей

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    Every day a significant part of the world population spends several hours on social networks. People fill information in their accounts about themselves, regularly updating it, thereby, they create a huge up-to-date database, which can be extracted and analyzed by someone. Such extraction often happened without informing people whose data were extracted. This can be a threat to the personal data of social networks' users. However, users' data can also be used for good purposes, such as to improve existing business processes and social ones, which ultimately can benefit society and can help automate many processes. These aspects will be discussed in this article. The article considers some options for using data from social networks, such as identifying stress based on social interactions in social networks, creating a reliable online survey using personal information from social networks, automated data collection for calculating credit ratings based on financial transactions and social networks, and also features of the Russian legislation in the field of personal data.Каждый день значительная часть населения земли тратит несколько часов на социальные сети. Люди наполняют свои аккаунты информацией о себе, регулярно обновляя ее, тем самым создают огромную актуальную базу данных, которую кто-то сможет извлечь и проанализировать. Такое извлечение зачастую может происходить без ведома людей, чьи данные извлекаются, и в корыстных целях. Это может представлять угрозу персональным данным пользователям социальных сетей. Тем не менее, данные пользователей социальных сетей также могут использоваться и для благих целей, для усовершенствования существующих как бизнес процессов, так и социальных, что в итоге может принести благо в общество и автоматизировать множество процессов, которые не были автоматизированы ранее. В данной статье будут рассмотрены некоторые варианты использования данных из социальных сетей, такие как: выявление стресса на основе социальных взаимодействий в социальных сетях, формирование достоверного онлайн-опроса с использованием персональной информации из социальных сетей, автоматизированный сбор данных для расчета кредитного рейтинга на основе финансовых операций и социальных сетей, а также особенности российского законодательства в области персональных данных

    Expression of DROSHA and DICER genes in peripheral blood leukocytes in lung sarcoidosis

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    Aim. To study the expression level of the genes DROSHA and DICER in peripheral blood leukocytes (PBL) of patients with sarcoidosis of the lungs Materials and methods. The study included 32 patients diagnosed with persistent lung sarcoidosis (mean age 41.56±1.27 years) and 36 healthy donors (control; mean age 42.79±1.95 years). The level of expression of messenger RNA (mRNA) of the genes DROSHA and DICER were determined in PBL of healthy donors and patients with sarcoidosis of the lung by polymerase chain reaction in real time. Results. As a result of the conducted researches it is established that the level of drosha gene expression in PBL patients with sarcoidosis of lungs is significantly reduced in comparison with the control (

    Информационно-аналитическая система «Электронная похозяйственная книга»

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    The article describes the organizational frameworks and the technical possibilities of existing in the Republic of Tatarstan informational and analytical system «Electronic household books». Users of the Electronic household books are the executive committees of municipalities, rural communities administrations, Chambers for property and land relations, financial and budgetary Chambers of municipal areas, the Ministry of Agriculture and Food of the Republic of Tatarstan, the Ministry of Finance of the Republic of Tatarstan, as well as the territorial divisions of Statistics. The household book contains a number of important data on the agricultural sector (for quantity of rural population, the availability of land, quantity of farm animals and farm owned agricultural machinery and vehicles). The system allows to create various types of certificates at requests of population and solve many issues regarding socio-economic development of territories.В статье изложены организационные основы и технические возможности действующей в Республике Татарстан информационно-аналитической системы «Электронная похозяйственная книга». Пользователями Электронной похозяйственной книги являются исполкомы муниципальных образований, администрации сельских поселений, палаты имущественных и земельных отношений, финансово-бюджетные палаты муниципальных районов, Министерство сельского хозяйства и продовольствия Республики Татарстан, Министерство финансов Республики Татарстан, а также территориальные подразделения органов статистики. Похозяйственная книга содержит ряд важных данных об аграрном секторе (о численности сельского населения, наличии земельных участков, количестве сельскохозяйственных животных и принадлежащих хозяйству сельскохозяйственной техники и транспортных средств). Система позволяет формировать различного вида справки по запросам населения и решать множество вопросов социально-экономического развития территорий
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