Associated data on the physicochemical properties of pedosediments, climatic and dendrochronological indicators for palaeogeographic reconstructions

Palaeogeographic markers can be justified among a large number of geochemical indicators in separate layers of pedosediments. Using individual of macroelements and trace elements as part of complex geochemical relationships and indicators allows us to determine the geochemical associations of elements that diagnose migration of the sediments at the trans-eluvial catena

Postantique soils as a source of land use information: a case study of an ancient greek agricultural area on the Northern Black Sea coast

This paper explores ancient land-use practices in order to reconstruct the original parameters of the land division system, as well as agricultural techniques employed. For postantique agricultural landscapes, an integrated geoarchaeological approach that includes GIS and remote sensing methodologies, in-field study of microrelief and soil registrograms, pedochronological dating technique, and physicochemical, geochemical, and biomorphic soil analyses has been developed and teste

Vortex Interferometric Microscopy with Laguerre-Gaussian Beams

In the present research, we discuss the results of analysis of coherent light beams carrying an optical vortex and propagating through the isotropic medium with a complex surface microrelief and its application to super resolution microscopy. It was shown, that phase analysis of singular beam with single charged centered optical vortex allow to retrieve information about sample surface relief. High spatial resolution caused by vortex helical phase sensitivity to disturbances in wave front after reflection or spreading through studying sample, which can be optically transparent or have a reflecting surface. This method applicable for non-destructive testing of live cells and biological tissues in real-time regime with exceeding optical diffraction limit. Vertical resolution of a microscope based on the phase singularity of Laguerre-Gaussian beams of low order can be achieved down to 5,27 nm for helium-neon laser source for optically transparent and reflecting surfaces. Keywords: optical vortex, phase, microscopy, singularit

Dialectics and Implications of Natural Neurotropic Autoantibodies in Neurological Disease and Rehabilitation

The role of natural idiotypic (Id-Abs) and anti-idiotypic (AId-Abs) autoantibodies against neuro-antigens observed in different neurological disorders is not fully understood. In particular, limited experimental evidence has been provided concerning the qualitative and quantitative serological response after acute injuries of the central nervous system or during chronic mental diseases. In this study, we analyzed the specific Id-Abs and AId-Abs serological reactivities against 4 neuro-antigens in a large population of patients with ischemic stroke, schizophrenia, as well as healthy individuals. Patients with ischemic stroke were tested at different time points following the acute stroke episode and a correlation was attempted between autoantibodies response and different patterns of functional recovery. Results showed variable and detectable Id-Abs and AId-Abs in different proportions of all three populations of subjects. Among patients with different functional recovery after ischemic stroke, a difference in time-related trends of Id-Abs and AId-Abs was encountered. Our observations suggest that changes in the production of natural neurotropic Abs may engender a positive homeostatic, beside a possible pathogenic effect, in specific neurological disorders

Chemical data on ashy soils as an information basis for dating archaeological sites

Geochemical associations of accumulated and dis- persed elements in the upper horizon of soils of different age in relation to the original ash were determined. This makes it possible to calculate the time of biogeochemical transfor- mation of ash in the course of pedogenesis, thus offering a new dating technique for archaeologist

Sequence Stratigraphy and Onlap History of the Donets Basin, Ukraine: Insight into Carboniferous Icehouse Dynamics

The degree to which Permo-Carboniferous cyclothemic successions archive evidence for long-term variations in ice volume during the Late Paleozoic Ice Age is insufficiently resolved. Here we develop the sequence stratigraphy and onlap-offlap history for a 33-my interval of the Carboniferous using the U-Pb calibrated succession of the Donets Basin, Ukraine, in order to assess the relationship between sea-level, high-latitude changes in glacial extent, and climate. Integrated subsurface and outcrop data permit meter-scale correlation of 242 biostratigraphically constrained limestones and coals, and in turn individual cyclothems, across ~250 km of the Donets Basin. Rapid uniform subsidence and basinwide continuity of marker beds indicate Pennsylvanian deposition under relatively stable tectonic conditions. Three scales of sequences (avg. durations of ~140 ky, ~480 ky and 1.6 my) are recognized on the basis of stratigraphic stacking patterns and basinwide architecture of marine to terrestrial facies assemblages. The hierarchy of sequences and the geographic and stratigraphic positions of shifts in base-level sensitive facies across the Donets ramp permit the construction of an onlap-offlap history at a sub-400 ky scale. Major sea-level lowstands occur across the mid-Carboniferous boundary and during the early Moscovian. These lowstands coincide with glacial maxima inferred from high-latitude glacigenic deposits. The middle to late Pennsylvanian is characterized by a stepwise onlap, culminating in an earliest Gzhelian highstand, suggesting contraction of Carboniferous ice sheets prior to the initiation of Early Permian glaciation. The stratigraphic position of climate sensitive facies within individual Donets cyclothems indicates a turnover from seasonal sub-humid or semi-arid climate to everwet conditions during the late lowstand and maximum ice sheet accumulation. Comparison of the stratigraphic and aerial distribution of coals and evaporites in the Donets Basin with the onlap-offlap history further indicates everwet conditions during lowstands and inferred glacial maxima and drier climate during onlap and inferred ice sheet contraction at the intermediate (~0.8 to 1.6 my) and long (106 yr) time-scales. Taken together, the relationship between inferred climate and glacioeustasy suggests a likely teleconnection between high-latitude ice sheet behavior and low-latitude atmospheric dynamics

ФОРМУВАННЯ ГАЗОМЕТАЛЕВОГО ПОТОКУ В УМОВАХ «ХІМІЧНОГО» ВАКУУМУ У СТАЛЕВИПУСКНОМУ КАНАЛІ

The results of laboratory research to determine the hydro-gas-dynamic patterns the formation of gas-metal flow at an tapping from an oxygen converter to steel ladle are given due to the injection of subsonic argon jets into the melt flow through nozzles located in the steel-tapping channel.Using the method of low-temperature simulation, determined the influence of design parameters of the proposed design of a two-chamber steel-tapping channel (length of the reaction zone, the number and location of gas nozzles) and gas consumption on the degree of organization and protection of the gas-liquid flow (GLF) when the gas blowing into the working space of the steel-tapping channel.Was obtained mathematical relation characterizing the mutual influence on the opening angle of the GLF between of the relative length of the "reaction zone" (x) and the gas flow rate through the nozzle. It is shown that when the length of the "reaction zone" decreases, an extremum occurs at lower gas consumption, and the value of "subcritical" gas consumption has a greater range. So, when the length of the "reaction zone" decreases, an extremum occurs at lower gas consumption, and the value of "subcritical" gas consumption has a greater range.The possibility of retaining the angle of disclosure of the gas-liquid flow (α) in the range of up to 5° with a relative length of the reaction zone of 0,75 has been proved. It is shown that with an increase of α from 1...3° to 10°, the efficiency of the protective action of argon (k) decreases from 0,99 to 0,72. At x = 0,75, the coefficient k is in the range of 0,89...0,99. It is established that when the critical gas flow is exceeded and x = 0,25, the value of α rises to an inadmissible 10...15°.The classification of the purges of the melt flow in the steel-tapping channel is proposed, depending on the angle of inclination of the gas jets relative to the axis of the last (γ) in accordance with which are allocated: the mode of "interruption" (γ > 78°), at which the gas jets unclosed, the formation of the gas-liquid flow does not occur; the mode of "closing" (0  78°), при якому газові струмені розімкнуті, формування газорідинного потоку не відбувається; режим «змикання» (0 < γ < 78°), при якому газові потоки об’єднані, формується газорідинний потік з розвиненою міжфазною поверхнею і високим ступенем організації, та режим «пробою» (γ = 0°), при якому подальше збільшення витрати газу, що перевищує критичну, призводить до пробою і руху газорідинного потоку у дисперсно-кільцевому режимі із зменшенням ступеня організації потоку