Estimation of selective reduction of iron and phosphorus from manganese ores of different genesis

The possibility of selective reduction of iron from complex oxides by carbon monoxide gas is investigated. Brazilian ore rich in manganese oxide, ferromanganese ore from the Selezenskoye Deposit (Russia) and concentrate from the Zhayrem GOK (Kazakhstan) were used as samples. Experiments have shown that it is possible to selectively reduce iron from complex manganese ores to a metallic state not only with solid carbon, but also with carbon monoxide. Experimental results of solid-phase reduction showed that at a temperature of 900 C. With an exposure time of 1.5 hours, the release of metallic iron is detected. At the same time, in the atmosphere with the metal phase, there is no presence of other elements other than iron in the metal. As the temperature rises to 1000 C, the amount of metallic iron, as well as manganese and phosphorus, increases. At a temperature of 1000 C, phosphorus turns into metal, despite the type of reducing agent. In all experiments, oxides of manganese, silicon and calcium remained in the oxide part. © Published under licence by IOP Publishing Ltd

Kneadings, Symbolic Dynamics and Painting Lorenz Chaos. A Tutorial

A new computational technique based on the symbolic description utilizing kneading invariants is proposed and verified for explorations of dynamical and parametric chaos in a few exemplary systems with the Lorenz attractor. The technique allows for uncovering the stunning complexity and universality of bi-parametric structures and detect their organizing centers - codimension-two T-points and separating saddles in the kneading-based scans of the iconic Lorenz equation from hydrodynamics, a normal model from mathematics, and a laser model from nonlinear optics.Comment: Journal of Bifurcations and Chaos, 201

A BK channel–mediated feedback pathway links single-synapse activity with action potential sharpening in repetitive firing

Action potential shape is a major determinant of synaptic transmission, and mechanisms of spike tuning are therefore of key functional significance. We demonstrate that synaptic activity itself modulates future spikes in the same neuron via a rapid feedback pathway. Using Ca2+ imaging and targeted uncaging approaches in layer 5 neocortical pyramidal neurons, we show that the single spike–evoked Ca2+ rise occurring in one proximal bouton or first node of Ranvier drives a significant sharpening of subsequent action potentials recorded at the soma. This form of intrinsic modulation, mediated by the activation of large-conductance Ca2+/voltage-dependent K+ channels (BK channels), acts to maintain high-frequency firing and limit runaway spike broadening during repetitive firing, preventing an otherwise significant escalation of synaptic transmission. Our findings identify a novel short-term presynaptic plasticity mechanism that uses the activity history of a bouton or adjacent axonal site to dynamically tune ongoing signaling properties

LOCAL RECURRENCE OF TUBULOCYSTIC CARCINOMA 4 YEARS AFTER RENAL RESECTION (A CLINICAL OBSERVATION)

The paper describes a clinical case of a local recurrence of tubulocystic carcinoma (TCC) in a 46-year-old man, a relatively good course (the relapse occurred after 4 years), who has been successfully operated on and is being followed up. This disease is a rare renal malignancy and, until recently, it has been referred to as collecting tubular carcinoma. However, this disease has come to be regarded as an independent nosological entity, by taking into account its certain morphological, immunohistohemical, and cytogenetic characteristics, as well as the nature of its course. About 80 TCC cases have been described to date. Further study of this disease and other rare renal malignancies will allow the more accurate elaboration of management tactics for such patients in terms of certain prognostic factors, which calls for a larger number of cases of this disease

Experience of interinstitutional interaction while delivering of surgical aid in the disasters environment

Objective. Investigation of interinstitutional interaction environment while delivering of surgical aid in conditions of disaster, the need in certain kinds of surgical operations estimation of efficacy of civil-military interaction in sector of the antiterrorist operation conduction. Materials and methods. The results of surgical treatment of 290 wounded persons and patients in medical company of Military Forces of Ukraine, which have functioned in a health care facility on Lugansk direction in summer 2015 yr, were presented. The efficacy of a civil-military interaction was estimated. Methods of the system analysis, clinical, medic-statistic and economic were there applied. Results. Introduction of system of the civil-military interaction while conduction of to all wounded persons and patients, to enhance the resource support of a health care facility by 39.7%. Conclusion.Joint usage of present civil and military resources for delivery of medical help to patients and wounded persons impacts on the treatment results positively

The political import of deconstruction—Derrida’s limits?: a forum on Jacques Derrida’s specters of Marx after 25 Years, part I

Jacques Derrida delivered the basis of The Specters of Marx: The State of the Debt, the Work of Mourning, & the New International as a plenary address at the conference ‘Whither Marxism?’ hosted by the University of California, Riverside, in 1993. The longer book version was published in French the same year and appeared in English and Portuguese the following year. In the decade after the publication of Specters, Derrida’s analyses provoked a large critical literature and invited both consternation and celebration by figures such as Antonio Negri, Wendy Brown and Frederic Jameson. This forum seeks to stimulate new reflections on Derrida, deconstruction and Specters of Marx by considering how the futures past announced by the book have fared after an eventful quarter century. Maja Zehfuss, Antonio Vázquez-Arroyo and Dan Bulley and Bal Sokhi-Bulley offer sharp, occasionally exasperated, meditations on the political import of deconstruction and the limits of Derrida’s diagnoses in Specters of Marx but also identify possible paths forward for a global politics taking inspiration in Derrida’s work of the 1990s

Atomic force microscopy of layer-doped triglycine sulfate ferroelectric crystals

This work was supported by the Ministry of Science and Higher Education within the State assignment FSRC «Crystallography and Photonics» RAS

МЕСТНЫЙ РЕЦИДИВ ТУБУЛОКИСТОЗНОЙ КАРЦИНОМЫ ЧЕРЕЗ 4 ГОДА ПОСЛЕ РЕЗЕКЦИИ ПОЧКИ (КЛИНИЧЕСКОЕ НАБЛЮДЕНИЕ)

The paper describes a clinical case of a local recurrence of tubulocystic carcinoma (TCC) in a 46-year-old man, a relatively good course (the relapse occurred after 4 years), who has been successfully operated on and is being followed up. This disease is a rare renal malignancy and, until recently, it has been referred to as collecting tubular carcinoma. However, this disease has come to be regarded as an independent nosological entity, by taking into account its certain morphological, immunohistohemical, and cytogenetic characteristics, as well as the nature of its course. About 80 TCC cases have been described to date. Further study of this disease and other rare renal malignancies will allow the more accurate elaboration of management tactics for such patients in terms of certain prognostic factors, which calls for a larger number of cases of this disease.Представлен клинический случай местного рецидива тубулокистозной карциномы (ТКК) относительно благоприятного течения у мужчины 46 лет, который успешно был прооперирован по поводу данного редидива и в настоящее время наблюдается. Данное заболевание относится к редким злокачественным новообразованиям почки и до недавнего времени рассматривалось как, карцинома собирательных трубочек. Однако, учитывая определенные морфологические, иммуногистохимические, цитогенетические характеристики, а также характер течения, данное заболевание стали классифицировать как самостоятельную нозологическую единицу. К настоящему моменту описано около 80 случаев ТКК. Дальнейшее изучение данного заболевания, а также других редких злокачественных новообразований почки позволит выработать наиболее приемлемую тактику ведения таких пациентов

МЕСТНЫЙ РЕЦИДИВ ТУБУЛОКИСТОЗНОЙ КАРЦИНОМЫ ЧЕРЕЗ 4 ГОДА ПОСЛЕ РЕЗЕКЦИИ ПОЧКИ (КЛИНИЧЕСКОЕ НАБЛЮДЕНИЕ)

The paper describes a clinical case of a local recurrence of tubulocystic carcinoma (TCC) in a 46-year-old man, a relatively good course (the relapse occurred after 4 years), who has been successfully operated on and is being followed up. This disease is a rare renal malignancy and, until recently, it has been referred to as collecting tubular carcinoma. However, this disease has come to be regarded as an independent nosological entity, by taking into account its certain morphological, immunohistohemical, and cytogenetic characteristics, as well as the nature of its course. About 80 TCC cases have been described to date. Further study of this disease and other rare renal malignancies will allow the more accurate elaboration of management tactics for such patients in terms of certain prognostic factors, which calls for a larger number of cases of this disease.Представлен клинический случай местного рецидива тубулокистозной карциномы (ТКК) относительно благоприятного течения у мужчины 46 лет, который успешно был прооперирован по поводу данного редидива и в настоящее время наблюдается. Данное заболевание относится к редким злокачественным новообразованиям почки и до недавнего времени рассматривалось как, карцинома собирательных трубочек. Однако, учитывая определенные морфологические, иммуногистохимические, цитогенетические характеристики, а также характер течения, данное заболевание стали классифицировать как самостоятельную нозологическую единицу. К настоящему моменту описано около 80 случаев ТКК. Дальнейшее изучение данного заболевания, а также других редких злокачественных новообразований почки позволит выработать наиболее приемлемую тактику ведения таких пациентов