Modern trends and challenges of development of global aluminum industry

This article overviews complex study into modern trends and challenges of development of global aluminum industry. Dynamics, structure, and segmentation of global aluminum market are discussed in terms of systematic analysis. On this basis strategic map of the industry has been plotted and five forces of competition on global aluminum market have been determined which will influence directly on functioning and development of aluminum producing companies

PSYCHOSOMATICS IN EATING DISORDERS

Background: To study the psychosomatic options and dynamics in patients with eating disorders. To conduct a comparative study of psychosomatic characteristics of surveyed patients with eating disorders, taking into account the duration and severity of protein-energy deficiency and levels of catecholamines excretion; to reveal features of mental working capacity, basic mental processes and EEG data at different stages of eating disorders; to develop scientifically based effective methods and means for correcting pathological changes that have arisen as a result of prolonged protein-energy deficiency in eating disorders. Methods: Catamnestic, statistical, clinico-psychopathological with somatic, psychological and laboratory examination, anthropometry, high-performance liquid chromatography, electroencephalography. Statistical analysis of collected data was processed using the program IBM SPSS Statistics 22, the confidence level p-.001. Results: The long-term consequences of prolonged fasting in 500 women with eating disorders (ED), who applied for help at the RUDN department and were examined in 1987-2013, were studied. The most common somatic complications of prolonged proteinenergy deficiency were investigated. In addition to the clinical method and anthropometry, to measure the efficiency of weight gain after prolonged alimentary deficiencies and to treat anorexia nervosa patients the pathopsychological method of "Shabalina\u27s complex decoding" and analysis of catecholamine excretion rates in urine of patients with anorexia at different stages of therapy were used. Improvement of mental performance and general condition of the examined after applying the developed treatment was observed. Scientifically based principles of therapy, allowing to avoid complications of long-term fasting and during weight gain were suggested

Nanоbiocomposite based on dihydroquercetin and arabinogalactan in the form of a gel for external use as a means for the treatment of chronic venous insufficiency in an experiment

Background. Due to the high prevalence of chronic venous insufficiency among the population, with a decrease in the quality of life of patients and their early disability, there is a need to develop modern effective and safe means for the prevention and treatment of this pathology. We have developed the optimal composition and technology of a gel for external use based on a nanobiocomposite of dihydroquercetin and arabinogalactan, which has a venoprotective effect. The article presents data on the results of a preclinical study of the safety and specific activity of the gel.The aim. To study the specific activity (decongestant, antitranssudative action) and safety of a gel for external use based on nanobiocomposite of dihydroquercetin and arabinogalactan used for the treatment of chronic venous insufficiency in the framework of preclinical studies.Materials and methods. The object of the study was a gel for external use based on dihydroquercetin and arabinogalactan nanobiocomposite. The study was conducted on 32 white male rats of the same age, for 15 days. The study of the pharmacological activity of a gel based on a nanobiocomposite of dihydroquercetin and arabinogalactan, was carried out on a model of acute venous stagnation in the tail of a rat (edema of non-inflammatory genesis), the dynamics of tail volume growth in the experimental and control group of animals was evaluated. The irritant effect of the gel on the skin of animals was also determined, the permeability of the capillaries of the skin was determined.Results. When studying the pharmacological activity of the gel on a model of acute venous stagnation in the tail, it was shown that a soft dosage form for external use developed on the basis of nanobiocomposite of dihydroquercetin and arabinogalactan has decongestant and antitranssudative activity. The presence of a locally irritating effect in the gel under study has not been established in the framework of the experiment.Conclusion. In the course of preclinical study of the gel of the nanobiocomposite dihydroquercetin and arabinogalactan on laboratory animals, its antitranssudative activity and safety have been proven

A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains

Large airbursts, the most frequent hazardous impact events, are estimated to occur orders of magnitude more frequently than crater-forming impacts. However, finding traces of these events is impeded by the difficulty of identifying them in the recent geological record. Here, we describe condensation spherules found on top of Walnumfjellet in the Sør Rondane Mountains, Antarctica. Affinities with similar spherules found in EPICA Dome C and Dome Fuji ice cores suggest that these particles were produced during a single-asteroid impact ca. 430 thousand years (ka) ago. The lack of a confirmed crater on the Antarctic ice sheet and geochemical and 18O-poor oxygen isotope signatures allow us to hypothesize that the impact particles result from a touchdown event, in which a projectile vapor jet interacts with the Antarctic ice sheet. Numerical models support a touchdown scenario. This study has implications for the identification and inventory of large cosmic events on Earth

ПРОБЛЕМЫ ДИАГНОСТИКИ И ЛЕЧЕНИЯ ФИЛЛОИДНЫХ ОПУХОЛЕЙ МОЛОЧНОЙ ЖЕЛЕЗЫ

The study revealed that in case of standard survey of patients with phyllodes tumors (PT), mistakes are made in 66 % of cases. The use of a sonoelastography and ultrasonography with contrasting allows avoiding errors in most cases. Long-term results of treatment correlate with the PT subgroup. Recurrence–free (overall survival) figures in case of benign PT are reliably higher than in case of malignant PT. Limited excision of the tumor is followed by highly frequent local recurrence in case of any subgroup of PT (30 %). Lumpectomy is also followed by highly frequent local recurrence that first of all concerns malignant PT (57 %). The main options for surgical treatment of malignant PT are breast amputation or a mastectomy.В исследовании выявлено, что при стандартном обследовании больных с филлоидными опухолями (ФО) ошибки допускаются в 66 % случаев. Использование соноэластографии и УЗИ с контрастированием позволяет избежать ошибки в большинстве случаев. Отдаленные результаты лечения коррелируют с вариантом ФО. Показатели безрецидивной и общей выживаемости при доброкачественном варианте ФО достоверно выше, чем при злокачественном. Ограниченное иссечение опухоли сопровождается высокой частотой местных рецидивов при любом варианте ФО (30 %). Сегментарная резекция также сопровождается высокой частотой местных рецидивов, что, в первую очередь, касается злокачественного варианта ФО (57 %). В результате хирургическое лечение злокачественного варианта ФО должно ограничиваться ампутацией молочной железы или мастэктомией

ВОЗМОЖНОСТИ УЛЬТРАЗВУКОВОГО ЦВЕТОВОГО ДОППЛЕРОВСКОГО КАРТИРОВАНИЯ В РАННЕЙ ДИАГНОСТИКЕ РАКА МОЛОЧНОЙ ЖЕЛЕЗЫ

Background. Experimental data suggest that tumor growth depends on angiogenesis. Once the tumor reaches a size of up to a 1 mм in diameter, a further increase in the population of tumor cells requires the growth of new blood vessels. In contrast to benign lesions, a rapid growth of cancer cells results in the formation of pathological vessels of different diameter and chaotic distribution. therefore, determination of the type of vascularization of lesions is an important criterion in the diagnosis of breast cancer (Bc). color Doppler mapping (cDM) is an ultrasound technology that evaluates blood floor through a blood vessel; however, according to data from a variety of literature sources, cDM is not sensitive to slow (week) blood flow as it allows the visualization of only large vessels with a diameter of at least 100 µm. The purpose of the study was to evaluate the diagnostic value of cDM in determining the type of vascularization of malignant and benign breast tumors, as well as to detect their statistically significant Doppler characteristics by comparing with histological findings. material and methods. From 2017 to 2019, a total of 277 women with complaints of breast lump or pain underwent ultrasound examination using cDM. Results. statistically and diagnostically significant us characteristics of benign lesions included the presence of avascular or hypovascular types of blood flow. the most significant characteristic of malignant lesions was the presence of hypervascular mixed blood flow. the diagnostic value of ultrasound B-mode in combination with cDM in differential diagnosis of breast tumors was as follows: 77.6 % sensitivity, 51.7 % specificity and 58.8 %. accuracy. Conclusion. statistically and diagnostically significant signs observed by cDM allow one to use this ultrasound technology in the early diagnosis of breast cancer. However, low diagnostic efficiency of cDM dictate the need to search for new ultrasonic signs.Введение. Экспериментальные данные свидетельствуют о том, что рост опухоли напрямую зависит от ангиогенеза. После того, как опухоль достигает размера до 1 мм в диаметре, дальнейшее увеличение популяции опухолевых клеток требует роста новых кровеносных сосудов. Вследствие быстрого роста в злокачественных образованиях, в отличие от доброкачественных, определяются патологические сосуды, имеющие разный диаметр и хаотичное распределение. Следовательно, определение типа васкуляризации образования является важным критерием в диагностике рака молочной железы (РМЖ). Цветовое допплеровское картирование (ЦДК) – ультразвуковая технология, позволяющая визуализировать сосуды, однако, по данным литературы, ЦДК не чувствительно к низкоскоростному кровотоку, так как позволяет визуализировать только крупные сосуды диаметром не менее 100 μm.Цель исследования – оценить возможности ЦДК в определении типа васкуляризации злокачественных и доброкачественных образований молочной железы, а также выявить статистически и диагностически  значимые допплеровские характеристики путем сопоставления с гистологическим заключением.Материал и методы. Исследование проводилось на базе ФГБУ «НМИЦ онкологии им. Н.Н. Петрова» Минздрава России с 2017 по 2019 г. В исследование были включены 277 женщин с жалобами на образование или болезненные ощущения в молочных железах, которым выполнялось ультразвуковое исследование с применением ЦДК. Результаты. К статистически и диагностически значимым ультразвуковым характеристикам доброкачественных образований можно отнести наличие аваскулярного или гиповаскулярного типов кровотока. Наиболее значимой характеристикой злокачественных образований является наличие гиперваскулярного смешанного кровотока. Диагностическая эффективность  ультразвукового В-режима в сочетании с ЦДК в дифференциальной диагностике образований молочной железы: чувствительность – 77,6 %; специфичность – 51,7 %; точность – 58,8 %. Выводы. Выявленные статистически и диагностически значимые признаки при ЦДК позволяют использовать данную ультразвуковую технологию в ранней диагностике рака молочной железы. Однако невысокие показатели диагностической эффективности ЦДК диктуют необходимость поиска новых ультразвуковых признаков.

A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains

Large airbursts, the most frequent hazardous impact events, are estimated to occur orders of magnitude more frequently than crater-forming impacts. However, finding traces of these events is impeded by the difficulty of identifying them in the recent geological record. Here, we describe condensation spherules found on top of Walnumfjellet in the Sør Rondane Mountains, Antarctica. Affinities with similar spherules found in EPICA Dome C and Dome Fuji ice cores suggest that these particles were produced during a single-asteroid impact ca. 430 thousand years (ka) ago. The lack of a confirmed crater on the Antarctic ice sheet and geochemical and 18O-poor oxygen isotope signatures allow us to hypothesize that the impact particles result from a touchdown event, in which a projectile vapor jet interacts with the Antarctic ice sheet. Numerical models support a touchdown scenario. This study has implications for the identification and inventory of large cosmic events on Earth

НЕЙРОЭНДОКРИННЫЕ ОПУХОЛИ ШЕЙКИ МАТКИ

The purpose of the study was to summarize the available data on etiology, diagnosis, clinical symptoms and signs as well as on various approaches to the treatment of neuroendocrine cervical tumors.Material and Methods. The relevant sources were searched in the PubMed and cochrane Library systems, and publications from 1980 to 2019 were analyzed, 53 of which were used to write this review. We also included 6 case reports from N.N. Petrov National Research Center of Oncology.Results. Neuroendocrine tumors (NETs) are extremely rare and aggressive malignancies of the female genital tract, among which NETs of the cervix are the most common. Due to the rarity of these tumors, there are currently no treatment standards based on prospective, well-planned clinical trials. For these reasons, NETs present a significant therapeutic challenge for clinicians. Case reports. Six patients ranged in age from 32 to 71 years, with a median age of 46 years, were diagnosed with large-cell neuroendocrine carcinoma (4 patients) and small-cell neuroendocrine carcinoma (2 patients). One patient with stage IIIA dropped out of the follow-up schedule. Out of 5 followed up patients, 2 patients with stage IIIA and IIB died of disease progression after 6 and 11 months, respectively. One patient with stage IB1 is in remission for 16 months. Two patients with stage IIB continue to receive primary treatment.Conclusion. Neuroendocrine carcinoma of the cervix is a rare variant of cervical cancer. The choice of treatment options is decided only by a multidisciplinary team of doctors, and further research is required. Цель исследования – обобщение имеющихся данных об особенности этиологии и диагностики, клинической картине и различных подходах в лечении нейроэндокринных опухолей шейки матки.Материал и методы. Поиск соответствующих источников производился в системах PubMed и cochrane Library, анализировались публикации с 1980 по 2019 г., 53 из которых были использованы для написания данного обзора. Также в публикации освещены 6 случаев собственных наблюдений в НМИЦ онкологии им. Н.Н. Петрова.Результаты. Нейроэндокринные опухоли (НЭО) являются крайне редкими и агрессивными злокачественными новообразованиями нижнего женского полового тракта, среди которых НЭО шейки матки встречаются чаще всего. Из-за редкости этих опухолей в настоящее время отсутствуют стандарты по лечению, основанные на проспективных, хорошо спланированных клинических исследованиях. По этим причинам НЭО представляют собой актуальную проблему для клиницистов. По данным собственных наблюдений, в НМИЦ онкологии им. Н.Н. Петрова средний возраст пациенток (n=6) составил 46 лет, возрастной диапазон 32–71 год; распределение по гистотипу: крупноклеточная нейроэндокринная карцинома – 4, мелкоклеточная нейроэндокринная карцинома – 2 пациентки. Одна пациентка с IIIA стадией выбыла из наблюдения; из 5 прослеженных 2 пациентки с IIIA и IIB стадией умерли от прогрессирования заболевания через 6 и 11 мес соответственно, 1 пациентка с IB1 стадией после комбинированного лечения находится в ремиссии 16 мес. Две пациентки со IIB стадией в настоящее время продолжают получать первичное лечение.Заключение. Основная клиническая проблема заключается в редкой встречаемости данного гистологического подтипа опухоли шейки матки. Выбор тактики лечения решается мультидисциплинарно и требует дальнейших исследований.

Bottom-Water Conditions in a Marine Basin after the Cretaceous–Paleogene Impact Event: Timing the Recovery of Oxygen Levels and Productivity

An ultra-high-resolution analysis of major and trace element contents from the Cretaceous–Paleogene boundary interval in the Caravaca section, southeast Spain, reveals a quick recovery of depositional conditions after the impact event. Enrichment/depletion profiles of redox sensitive elements indicate significant geochemical anomalies just within the boundary ejecta layer, supporting an instantaneous recovery –some 102 years– of pre-impact conditions in terms of oxygenation. Geochemical redox proxies point to oxygen levels comparable to those at the end of the Cretaceous shortly after impact, which is further evidenced by the contemporary macrobenthic colonization of opportunistic tracemakers. Recovery of the oxygen conditions was therefore several orders shorter than traditional proposals (104–105 years), suggesting a probable rapid recovery of deep-sea ecosystems at bottom and in intermediate waters.This research was supported by Projects CGL2009-07603, CGL2008-03007, CGL2012-33281 and CGL2012-32659 (Secretaría de Estado de I+D+I, Spain), Projects RNM-3715 and RNM 05212, and Research Groups RNM-178 and 0179 (Junta de Andalucía)

Stochastic Inversion of P-to-S Converted Waves for Mantle Composition and Thermal Structure: Methodology and Application

We present a new methodology for inverting P‐to‐S receiver function (RF) waveforms directly for mantle temperature and composition. This is achieved by interfacing the geophysical inversion with self‐consistent mineral phase equilibria calculations from which rock mineralogy and its elastic properties are predicted as a function of pressure, temperature, and bulk composition. This approach anchors temperatures, composition, seismic properties, and discontinuities that are in mineral physics data, while permitting the simultaneous use of geophysical inverse methods to optimize models of seismic properties to match RF waveforms. Resultant estimates of transition zone (TZ) topography and volumetric seismic velocities are independent of tomographic models usually required for correcting for upper mantle structure. We considered two end‐member compositional models: the equilibrated equilibrium assemblage (EA) and the disequilibrated mechanical mixture (MM) models. Thermal variations were found to influence arrival times of computed RF waveforms, whereas compositional variations affected amplitudes of waves converted at the TZ discontinuities. The robustness of the inversion strategy was tested by performing a set of synthetic inversions in which crustal structure was assumed both fixed and variable. These tests indicate that unaccounted‐for crustal structure strongly affects the retrieval of mantle properties, calling for a two‐step strategy presented herein to simultaneously recover both crustal and mantle parameters. As a proof of concept, the methodology is applied to data from two stations located in the Siberian and East European continental platforms.This work was supported by a grant from the Swiss National Science Foundation (SNF project 200021_159907). B. T. was funded by a Délégation CNRS and Congé pour Recherches et Conversion Thématique from the Université de Lyon to visit the Research School of Earth Sciences (RSES), The Australian National University (ANU). B. T. has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement 79382