Syntesis Copper Sulfide (Cu2S) from Organic Precursors

Досліджено умови синтезу купрум (І) сульфіду (Cu2S) термічним розкладом купрум (ІІ) хлориду, купрум (ІІ) ацетату і тіокарбаміду в органічному розчиннику: етиленгліколь, гліцерол, моноетаноламін. Одержані зразки досліджено методами хімічного та рентгенфазового аналізу (РФА) та методом електронної мікроскопії. Показано, що зміна параметрів синтезу, таких як розчинник, температура та час синтезу відіграють важливу роль при формуванні кристалітів Cu2S. Copper sulfide (Cu2S) have been prepared by a solvothermal reaction between copper (I) chloride, copper (II) acetate and thiourea in organic solvent: ethylene glycol, lycerol, ethanolamine. The products were characterized by chemical analysis and powder X-Ray difriction (XRD) and method of electronic microscopy. It was found that reaction parameters, such as sulfur source, solvent, reaction temperature and time, play important roles in morphology control of Cu2S

Маркетинговий підхід до визначення категорії "туристичний продукт"

In recent years, the role of tourism has been growing at a rapid pace in any economic system, and marketing mix 4ps model is an essential component of any economic activity including tourism industry. In this study we use empirical method, method of economic analysis, deductive and inductive methods. The principles of marketing relationship demonstrate a close tie between the customer's requirements and product offers, as well as the results of economic activity depend on correspondence to these requirements. Therefore, in this paper we investigate the concept of tourist product from the marketing position. We considered the basic approaches to the interpretation of the concept of "tourist product" by domestic and international researchers of this problem, and analysed different types of tourist product classification. The structure and features of tourist product were also analysed in this study. We revealed marketing factors that influence tourist product demand, such as political economic and ecological situation, geographical location, and cultural and social factors. Therefore, tourist product is not only a complex of goods and services that form the tourist trip and are paid by the tourist, such as transport and transfer, hotels and restaurants, sightseeing, attractions and souvenirs. Tourist product structure also includes one more very important component. It is an emotional component. As a result, from the tourist point of view the tourist product starts from the source where tourist takes information about the tourist product and it continues longer than a trip, because of the emotions the tourist got. Moreover, we considered the phase of the tourist product life cycle, such as the phase of implementation, growth, maturity and decline. We revealed that using of such marketing tool as product promotion has a direct proportional effect on both demand and prolonging of the tourist product life cycle. Widespread using of the means of promoting a tourist product on the market is proposed in order to expand the reach of target audience and create appropriate communication channels with the consumers. In the future we are going to reveal the most effective marketing tool in tourist industry.Розглянуто основні підходи до трактування суті поняття "туристичний продукт". Це зробили вітчизняні та світові дослідники з цієї проблематики. Особливу увагу приділено аналізу поняття "туристичний продукт" із позиції маркетингу. Наведено власне визначення категорії "туристичний продукт" із використанням маркетингового підходу. Також виявлено чинники впливу на туристичний продукт та формування попиту на нього. Висвітлено види туристичного продукту, проаналізовано його елементи й охарактеризовано особливості маркетингового складника туристичного продукту сучасного ринку. З'ясовано, що туристичний продукт із погляду туриста, а не суб'єкта туристичної галузі, бере свій початок із первинного джерела інформації (де турист почув про туристичний продукт) і триває довше, аніж закінчення самого туру (через отримані емоції від подорожі). Зазначено, що значна частка в структурі туристичного продукту належить саме емоційній складовій. Проаналізовано фази життєвого циклу туристичного продукту та виявлено, що використання такого маркетингового інструменту, як просування продукту, прямо пропорційно впливатиме як на попит, так і на продовження життєвого циклу туристичного продукту загалом. Запропоновано значне використання засобів просування туристичного продукту на ринку для ширшого охоплення цільової аудиторії та створення належних каналів комунікації із споживачем

First-order structural transition in the magnetically ordered phase of Fe1.13Te

Specific heat, resistivity, magnetic susceptibility, linear thermal expansion (LTE), and high-resolution synchrotron X-ray powder diffraction investigations of single crystals Fe1+yTe (0.06 < y < 0.15) reveal a splitting of a single, first-order transition for y 0.12. Most strikingly, all measurements on identical samples Fe1.13Te consistently indicate that, upon cooling, the magnetic transition at T_N precedes the first-order structural transition at a lower temperature T_s. The structural transition in turn coincides with a change in the character of the magnetic structure. The LTE measurements along the crystallographic c-axis displays a small distortion close to T_N due to a lattice striction as a consequence of magnetic ordering, and a much larger change at T_s. The lattice symmetry changes, however, only below T_s as indicated by powder X-ray diffraction. This behavior is in stark contrast to the sequence in which the phase transitions occur in Fe pnictides.Comment: 6 page

The Ca2+ sensor protein Swiprosin-1/EFhd2 is present in neurites and involved in kinesin-mediated transport in neurons

This work was supported by grants from the German Science Foundation (Deutsche Forschungsgemeinschaft, DFG; FOR832, to DM), the German Federal Ministry of Education and Research (01GQ113; to BW), the Bavarian Ministry of Sciences, Research and the Arts in the framework of the Bavarian Molecular Biosystems Reseach Network, the Interdisciplinary Center for Clinical Research (IZKF, Universitatsklinikum Erlangen; E8, to DM; NIII, to BW; Lab rotation to MR), the ELAN Fonds (Universitatsklinikum Erlangen; 11.08.19.1, to IP), and the Alzheimer’s Research UK (EB, FGM).Swiprosin-1/EFhd2 (EFhd2) is a cytoskeletal Ca2+ sensor protein strongly expressed in the brain. It has been shown to interact with mutant tau, which can promote neurodegeneration, but nothing is known about the physiological function of EFhd2 in the nervous system. To elucidate this question, we analyzed EFhd2-/-/lacZ reporter mice and showed that lacZ was strongly expressed in the cortex, the dentate gyrus, the CA1 and CA2 regions of the hippocampus, the thalamus, and the olfactory bulb. Immunohistochemistry and western blotting confirmed this pattern and revealed expression of EFhd2 during neuronal maturation. In cortical neurons, EFhd2 was detected in neurites marked by MAP2 and co-localized with preand post-synaptic markers. Approximately one third of EFhd2 associated with a biochemically isolated synaptosome preparation. There, EFhd2 was mostly confined to the cytosolic and plasma membrane fractions. Both synaptic endocytosis and exocytosis in primary hippocampal EFhd2-/- neurons were unaltered but transport of synaptophysin-GFP containing vesicles was enhanced in EFhd2-/- primary hippocampal neurons, and notably, EFhd2 inhibited kinesin mediated microtubule gliding. Therefore, we found that EFhd2 is a neuronal protein that interferes with kinesin-mediated transport.Peer reviewe