423 research outputs found
Creative Potential of Memes in Foreign Language Training
Internet-memes, new unique cultural units, have been attracting scientistsβ attention for a long time. The memes are of interest for linguists, culture researchers, and sociologists. Teachers also recognize massive opportunities that the use of memes offers for foreign language training. The present study proposes the effect of nonverbal component of a traditional (visual) Internet-meme on foreign language training. It is the nonverbal component (image, special form of gradation, visual opposition or other representation) that sets a broad context, which can be creatively used by a teacher. There are some practices that allow using the creation of the new culture for training as well as allowing students to rethink the training process in a creative way on their own
Minimising investment risks through optimising public-private partnership: the case of the Kaliningrad region
This study undertakes a contextual analysis of economic and legal risks associated with investment in the Kaliningrad region. The authors emphasise the importance of public-private partnership (PPP) in minimising such risks in order to enhance the region's attractiveness and to solve development problems. PPP has never been studied as a means to minimise regional investment risks in current conditions. This accounts for the scientific novelty of examining investment risks minimisation through proving the essentiality of developing PPP mechanisms on a unique Russian territory - the Kaliningrad region. The article analyses current investment risks, conditions, barriers, and avenues to enhance the investment climate in the Kaliningrad region. The authors utilise data on current investment in the region and consider the principles of the region's investment policy. The study stresses the need to develop the regional economy's "points of growth" within PPP schemes. It is proposed that the region and its municipalities should participate in partner projects in a manner that, firstly, is transparent to national and international investors and concordant with best practices and, secondly, enables the executive authorities and businesses to collaborate in developing the most efficient legal framework for partnership. The article identifies the role of PPP in solving the problem of regional development and gives recommendations on overcoming barriers and implementing PPP projects in the region
Transforming the Productivity of People in the Built Environment: Emergence of a Digital Competency Management Ecosystem
This chapter explores how we create and support a digitally enabled, agile, competent, and ultimately, productive workforce and determines the key research questions that need to be addressed if Digital Built Britain (DBB) is to provide return on investment and succeed as the catalyst for evolving the manner in which we conceive, plan, design, construct, operate, and interact with the built environment. The proposed vision is a digital competency management ecosystem where interdependent stakeholders are incentivised to work together in coopetition to create, capture, infer, interpret, specify, integrate, accredit, apply, use, monitor, and evolve competence as a working (data) asset. This needs to be in a consistent, objective, explicit, and scalable manner, with end2end transparency and traceability for all stakeholders that overcome the challenges of competency management. Moreover, a core element must be an ecosystem organised around digital infrastructure of competency frameworks and other knowledge sources of competence, so that competency frameworks are in digital operation and dynamic context
Endogenous amyloidogenesis in long-term rat hippocampal cell cultures
<p>Abstract</p> <p>Background</p> <p>Long-term primary neuronal cultures are a useful tool for the investigation of biochemical processes associated with neuronal senescence. Improvements in available technology make it possible to observe maturation of neural cells isolated from different regions of the rodent brain over a prolonged period <it>in vitro</it>. Existing experimental evidence suggests that cellular aging occurs in mature, long-term, primary neuronal cell cultures. However, detailed studies of neuronal development <it>in vitro </it>are needed to demonstrate the validity of long-term cell culture-based models for investigation of the biochemical mechanisms of <it>in vitro </it>neuronal development and senescence.</p> <p>Results</p> <p>In the current study, neuron-enriched hippocampal cell cultures were used to analyze the differentiation and degeneration of hippocampal neurons over a two month time period. The expression of different neuronal and astroglial biomarkers was used to determine the cytochemical characteristics of hippocampal cells in long-term cultures of varying ages. It was observed that the expression of the intermediate filament nestin was absent from cultures older than 21 days in vitro (DIV), and the expression of neuronal or astrocytic markers appeared to replace nestin. Additionally, morphological evaluations of neuronal integrity and Hoescht staining were used to assess the cellular conditions in the process of hippocampal culture development and aging. It was found that there was an increase in endogenous production of AΞ²<sub>1-42 </sub>and an increase in the accumulation of Congo Red-binding amyloidal aggregates associated with the aging of neurons in primary culture. <it>In vitro </it>changes in the morphology of co-existing astrocytes and cell culture age-dependent degeneration of neurodendritic network resemble features of <it>in vivo </it>brain aging at the cellular level.</p> <p>Conclusion</p> <p>In conclusion, this study suggests that long-term primary CNS culture is a viable model for the study of basic mechanisms and effective methods to decelerate the process of neuronal senescence.</p
NATIONAL QUALIFICATIONS FRAMEWORKS: CONCEPTUAL AND METHODOLOGICAL PRINCIPLES IN THE CONTEXT OF UNRESOLVED ISSUES
Introduction. The deficiency of highly skilled professionals meeting the requirements of the modern labour market has become the reason for search of new, more effective regulation mechanisms of vocational training and personnel certification for post-industrial knowledge-based economy. As international practice demonstrates, such mechanisms could be the National Qualifications Systems (NQS), National Qualifications Framework (NQF) and Professional Standards (PS) that are comparable with the European Qualifications Framework (EQF), designed for lifelong education implementation. Aim. Having analysed the international experience, the aims of the article are to discuss the issues of NQF and PS implementation and to consider the possibility of adaptation of the best models of foreign practice for the Russian realities. Methodology and research methods. The methods of collecting empirical information, comparative and conceptual-terminological analysis were applied in the course of studying methodological and methodical aspects of construction and functioning of NQS; the methods of generalization, interpretation and modeling were applied. The results and scientific novelty. The complex of the systemic problems which restrict the process of NQS formation launched in Russia is noted. The revealed reasons are explained by the developed psychological, organizational and methodical stereotypes; the ways of overcoming the current problems are outlined. According to the authors, the key problem is the dichotomy between professional and educational qualifications which does not exist in the international discourse, but is deeply rooted in consciousness of the Russians. Such a distinction involves irrational duplication of procedures for the qualifications assessment and generates a number of other difficulties interfering effective development of NQS and obtaining the maximum benefits from its use. In order to resolve the revealed contradictions and shortcomings, the authors analysed the experience of other countries where national systems of qualifications are implemented. Based on the international practice invariant systemically important parameters and variable characteristics of NQS and NQF are singled out and described. The typology of the qualifications framework and the principles of their design are proved. Practical significance. The research materials and findings, recommendations and suggestions for integrated improvement of mechanisms of Federal State Educational Standards, introduced PS and the system of independent assessment of qualifications can be useful for professional development of the experts and methodologists participating in design and modernization of NQF, development of professional and educational standards along with the main and additional programs of vocational training.ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅. ΠΡΡΡΠ°ΡΡΠΈΠΉΡΡ Π²ΠΎ ΠΌΠ½ΠΎΠ³ΠΈΡ
Π³ΠΎΡΡΠ΄Π°ΡΡΡΠ²Π°Ρ
Π΄Π΅ΡΠΈΡΠΈΡ Π²ΡΡΠΎΠΊΠΎΠΊΠ²Π°Π»ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΏΠ΅ΡΠΈΠ°Π»ΠΈΡΡΠΎΠ², ΠΎΡΠ²Π΅ΡΠ°ΡΡΠΈΡ
ΡΡΠ΅Π±ΠΎΠ²Π°Π½ΠΈΡΠΌ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΡΡΠ½ΠΊΠ° ΡΡΡΠ΄Π°, ΡΡΠ°Π» ΠΏΡΠΈΡΠΈΠ½ΠΎΠΉ ΠΏΠΎΠΈΡΠΊΠ° Π½ΠΎΠ²ΡΡ
, Π±ΠΎΠ»Π΅Π΅ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡ
ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΡΠ΅Π³ΡΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠΉ ΠΏΠΎΠ΄Π³ΠΎΡΠΎΠ²ΠΊΠΈ ΠΈ Π°ΡΡΠ΅ΡΡΠ°ΡΠΈΠΈ ΠΊΠ°Π΄ΡΠΎΠ² Π΄Π»Ρ ΠΏΠΎΡΡΠΈΠ½Π΄ΡΡΡΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΠΊΠΈ Π·Π½Π°Π½ΠΈΠΉ. Π’Π°ΠΊΠΈΠΌΠΈ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠ°ΠΌΠΈ, ΠΊΠ°ΠΊ ΠΏΠΎΠΊΠ°Π·ΡΠ²Π°Π΅Ρ ΠΌΠΈΡΠΎΠ²Π°Ρ ΠΏΡΠ°ΠΊΡΠΈΠΊΠ°, ΠΌΠΎΠ³ΡΡ ΡΡΠ°ΡΡ Π½Π°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΠΈΡΡΠ΅ΠΌΡ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ (ΠΠ‘Π), Π½Π°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΠ°ΠΌΠΊΠΈ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΉ (ΠΠ Π), ΡΠΎΠΏΠΎΡΡΠ°Π²ΠΈΠΌΡΠ΅ Ρ ΠΠ²ΡΠΎΠΏΠ΅ΠΉΡΠΊΠΎΠΉ ΡΠ°ΠΌΠΊΠΎΠΉ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΉ, ΡΠΎΠ·Π΄Π°Π½Π½ΠΎΠΉ Π΄Π»Ρ Π²ΠΎΠΏΠ»ΠΎΡΠ΅Π½ΠΈΡ ΠΊΠΎΠ½ΡΠ΅ΠΏΡΠΈΠΈ ΠΎΠ±ΡΡΠ΅Π½ΠΈΡ Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ Π²ΡΠ΅ΠΉ ΠΆΠΈΠ·Π½ΠΈ, ΠΈ ΡΠ°Π·ΡΠ°Π±Π°ΡΡΠ²Π°Π΅ΠΌΡΠ΅ ΡΠΈΠ½Ρ
ΡΠΎΠ½Π½ΠΎ Ρ Π½ΠΈΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΡΠ°Π½Π΄Π°ΡΡΡ (ΠΠ‘). Π¦Π΅Π»Ρ ΠΏΡΠ±Π»ΠΈΠΊΠ°ΡΠΈΠΈ β ΠΎΠ±ΡΡΠΆΠ΄Π΅Π½ΠΈΠ΅ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΎΠ±ΠΎΠ±ΡΠ΅Π½ΠΈΡ ΠΌΠ΅ΠΆΠ΄ΡΠ½Π°ΡΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΎΠΏΡΡΠ° ΡΡΡΠ½ΠΎΡΡΠ½ΡΡ
Π²ΠΎΠΏΡΠΎΡΠΎΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΠΠ Π ΠΈ ΠΠ‘ Π΄Π»Ρ ΠΈΠ·ΡΡΠΊΠ°Π½ΠΈΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠ΅ΠΉ Π°Π΄Π°ΠΏΡΠ°ΡΠΈΠΈ ΠΊ ΡΠΎΡΡΠΈΠΉΡΠΊΠΈΠΌ ΡΠ΅Π°Π»ΠΈΡΠΌ Π»ΡΡΡΠΈΡ
ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² Π·Π°ΡΡΠ±Π΅ΠΆΠ½ΠΎΠΉ ΠΏΡΠ°ΠΊΡΠΈΠΊΠΈ Π² Π΄Π°Π½Π½ΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ.ΠΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΡ ΠΈ ΠΌΠ΅ΡΠΎΠ΄Ρ. Π Ρ
ΠΎΠ΄Π΅ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΈΡΠ΅ΡΠΊΠΈΡ
Π°ΡΠΏΠ΅ΠΊΡΠΎΠ² ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΠΈ ΡΡΠ½ΠΊΡΠΈΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΠ‘Π ΠΏΡΠΈΠΌΠ΅Π½ΡΠ»ΠΈΡΡ ΠΌΠ΅ΡΠΎΠ΄Ρ ΡΠ±ΠΎΡΠ° ΡΠΌΠΏΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ, ΡΡΠ°Π²Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΈ ΠΏΠΎΠ½ΡΡΠΈΠΉΠ½ΠΎ-ΡΠ΅ΡΠΌΠΈΠ½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π°; ΠΎΠ±ΠΎΠ±ΡΠ΅Π½ΠΈΠ΅, ΠΈΠ½ΡΠ΅ΡΠΏΡΠ΅ΡΠ°ΡΠΈΡ ΠΈ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈ Π½Π°ΡΡΠ½Π°Ρ Π½ΠΎΠ²ΠΈΠ·Π½Π°. ΠΠ±ΠΎΠ·Π½Π°ΡΠ΅Π½ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ ΡΠΈΡΡΠ΅ΠΌΠ½ΡΡ
ΠΏΡΠΎΠ±Π»Π΅ΠΌ, ΡΠΎΡΠΌΠΎΠ·ΡΡΠΈΡ
Π·Π°ΠΏΡΡΠ΅Π½Π½ΡΠΉ Π² Π ΠΎΡΡΠΈΠΈ ΠΏΡΠΎΡΠ΅ΡΡ ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΡ ΠΠ‘Π. ΠΡΠΊΡΡΡΡ ΠΈΡ
ΠΏΡΠΈΡΠΈΠ½Ρ, ΠΊΠΎΡΠΎΡΡΠ΅ Π²ΠΎ ΠΌΠ½ΠΎΠ³ΠΎΠΌ ΠΎΠ±ΡΡΡΠ½ΡΡΡΡΡ ΡΠ»ΠΎΠΆΠΈΠ²ΡΠΈΠΌΠΈΡΡ ΠΏΡΠΈΡ
ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ, ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΎΠ½Π½ΡΠΌΠΈ ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΡΡΠ΅ΡΠ΅ΠΎΡΠΈΠΏΠ°ΠΌΠΈ, ΠΈ Π½Π°ΠΌΠ΅ΡΠ΅Π½Ρ ΠΏΡΡΠΈ ΠΏΡΠ΅ΠΎΠ΄ΠΎΠ»Π΅Π½ΠΈΡ ΠΈΠΌΠ΅ΡΡΠΈΡ
ΡΡ ΠΏΡΠΎΠ±Π»Π΅ΠΌ. ΠΠ»ΡΡΠ΅Π²ΠΎΠΉ ΡΡΠ΅Π΄ΠΈ Π½ΠΈΡ
, ΠΏΠΎ ΠΌΠ½Π΅Π½ΠΈΡ Π°Π²ΡΠΎΡΠΎΠ² ΡΡΠ°ΡΡΠΈ, ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΡΡΡΡΡΡΠ²ΡΡΡΠ΅Π΅ Π² ΠΌΠ΅ΠΆΠ΄ΡΠ½Π°ΡΠΎΠ΄Π½ΠΎΠΌ Π΄ΠΈΡΠΊΡΡΡΠ΅, Π½ΠΎ ΡΠΊΠΎΡΠ΅Π½ΠΈΠ²ΡΠ΅Π΅ΡΡ Π² ΡΠΎΠ·Π½Π°Π½ΠΈΠΈ ΡΠΎΡΡΠΈΡΠ½ ΠΏΡΠΎΡΠΈΠ²ΠΎΠΏΠΎΡΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
ΠΈ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΡ
ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΉ. ΠΠΎΠ΄ΠΎΠ±Π½ΠΎΠ΅ ΡΠ°Π·Π³ΡΠ°Π½ΠΈΡΠ΅Π½ΠΈΠ΅ Π²Π»Π΅ΡΠ΅Ρ Π·Π° ΡΠΎΠ±ΠΎΠΉ Π½Π΅ΡΠ°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ΅ Π΄ΡΠ±Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΎΡΠ΅Π΄ΡΡ ΠΈΡ
ΠΎΡΠ΅Π½ΠΊΠΈ ΠΈ ΠΏΠΎΡΠΎΠΆΠ΄Π°Π΅Ρ ΡΡΠ΄ Π΄ΡΡΠ³ΠΈΡ
ΡΠ»ΠΎΠΆΠ½ΠΎΡΡΠ΅ΠΉ, ΠΏΡΠ΅ΠΏΡΡΡΡΠ²ΡΡΡΠΈΡ
ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΌΡ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΠΠ‘Π ΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΡΡ
Π²ΡΠ³ΠΎΠ΄ ΠΎΡ Π΅Π΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ. ΠΠ»Ρ ΡΡΡΡΠ°Π½Π΅Π½ΠΈΡ Π²ΡΡΠ²Π»Π΅Π½Π½ΡΡ
ΠΏΡΠΎΡΠΈΠ²ΠΎΡΠ΅ΡΠΈΠΉ ΠΈ Π½Π΅Π΄ΠΎΡΡΠ°ΡΠΊΠΎΠ² ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½ ΠΎΠΏΡΡ Π΄ΡΡΠ³ΠΈΡ
ΡΡΡΠ°Π½, Π² ΠΊΠΎΡΠΎΡΡΡ
ΡΡΡΠ΅ΡΡΠ²ΡΡΡ Π½Π°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΠΈΡΡΠ΅ΠΌΡ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΉ. Π‘ ΠΎΠΏΠΎΡΠΎΠΉ Π½Π° ΠΌΠ΅ΠΆΠ΄ΡΠ½Π°ΡΠΎΠ΄Π½ΡΡ ΠΏΡΠ°ΠΊΡΠΈΠΊΡ Π²ΡΠ΄Π΅Π»Π΅Π½Ρ ΠΈ ΠΎΠΏΠΈΡΠ°Π½Ρ ΠΈΠ½Π²Π°ΡΠΈΠ°Π½ΡΠ½ΡΠ΅ ΡΠΈΡΡΠ΅ΠΌΠΎΠΎΠ±ΡΠ°Π·ΡΡΡΠΈΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΠΈ Π²Π°ΡΠΈΠ°ΡΠΈΠ²Π½ΡΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΠΠ‘Π ΠΈ ΠΠ Π. ΠΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½Π° ΡΠΈΠΏΠΎΠ»ΠΎΠ³ΠΈΡ ΡΠ°ΠΌΠΎΠΊ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΉ ΠΈ ΠΏΡΠΈΠ½ΡΠΈΠΏΡ ΠΈΡ
ΠΏΡΠΎΠ΅ΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ. ΠΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠ°Ρ Π·Π½Π°ΡΠΈΠΌΠΎΡΡΡ. ΠΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΈ ΡΡΠΎΡΠΌΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ Π΅Π³ΠΎ Π°Π²ΡΠΎΡΠ°ΠΌΠΈ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΠΈΠΈ ΠΈ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΈΡ ΠΏΠΎ ΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΡΠΎΠΏΡΡΠΆΠ΅Π½ΠΈΡ Π€ΠΠΠ‘, Π²Π½Π΅Π΄ΡΡΠ΅ΠΌΡΡ
ΠΠ‘ ΠΈ ΡΠΈΡΡΠ΅ΠΌΡ Π½Π΅Π·Π°Π²ΠΈΡΠΈΠΌΠΎΠΉ ΠΎΡΠ΅Π½ΠΊΠΈ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΉ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΏΠΎΠ»Π΅Π·Π½Ρ Π΄Π»Ρ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ ΡΠΊΡΠΏΠ΅ΡΡΠΎΠ² ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΈΡΡΠΎΠ², ΡΡΠ°ΡΡΠ²ΡΡΡΠΈΡ
Π² ΠΏΡΠΎΠ΅ΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΠΈ ΠΌΠΎΠ΄Π΅ΡΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΠΠ Π, ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
ΠΈ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΡ
ΡΡΠ°Π½Π΄Π°ΡΡΠΎΠ², Π° ΡΠ°ΠΊΠΆΠ΅ ΠΎΡΠ½ΠΎΠ²Π½ΡΡ
ΠΈ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠΉ ΠΏΠΎΠ΄Π³ΠΎΡΠΎΠ²ΠΊΠΈ
Water uptake and transport properties of La1-xCaxScO3-Ξ± proton-conducting oxides
In this study, oxide materials La1-xCaxScO3-Ξ± (x = 0.03, 0.05 and 0.10) were synthesized by the citric-nitrate combustion method. Single-phase solid solutions were obtained in the case of calcium content x=0.03 and 0.05,whereas a calcium-enriched impurity phasewas found at x=0.10. Water uptake and release were studied by means of thermogravimetric analysis, thermodesorption spectroscopy and dilatometry. It was shown that lower calcium content in the main phase leads to a decrease in the water uptake. Conductivity wasmeasured by four-probe direct current (DC) and two-probe ascension current (AC)methods at different temperatures, pO2 and pH2O. The effects of phase composition,microstructure and defect structure on electrical conductivity, as well as correlation between conductivity and water uptake experiments, were discussed. The contribution of ionic conductivity of La1-xCaxScO3-Ξ± rises with decreasing temperature and increasing humidity. The domination of proton conductivity at temperatures below 500 Β°C under oxidizing and reducing atmospheres is exhibited. Water uptake and release as well as transport properties of La1-xCaxScO3-Ξ± are compared with the properties of similar proton electrolytes, La1-xSrxScO3-Ξ±, and the possible reasons for their differences were discussed. Β© 2019 by the authors.Russian Science Foundation,Β RSF: 16-13-00053Government Council on Grants, Russian FederationMinistry of Education and Science of the Republic of KazakhstanFunding: The research was partially supported by the Russian Science Foundation (Grant β16-13-00053) and the Ministry of Education and Science of the Republic of Kazakhstan (Project No. AP05130148). The education activity of Ph.D. and students involved into this work is supported by Act 211 of Government of the Russian Federation, agreement No. 02.A03.21.0006
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