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ПЕСТИЦИДНЫЕ НАНОКОМПОЗИЦИИ НА ОСНОВЕ ПИПЕРИДИНИЕВЫХ ЭТИЛКАРБАМАТНЫХ ПАВ
Get PDFРабота выполнена при финансовой поддержке РНФ, проект № 23-73-10033
Stockmayer supracolloidal magnetic polymers under the influence of an applied magnetic field and a shear flow
Get PDFThe idea of creating magnetically controllable colloids whose rheological properties can be finely tuned on the nano- or micro-scale has caused a lot of experimental and theoretical effort. The latter resulted in systems whose building blocks are ranging between single magnetic nanoparticles to complexes of such nanoparticles bound together by various mechanisms. The binding can be either chemical or physical, reversible or not. One way to create a system that is physically bound is to let the precrosslinked supracolloidal magnetic polymers (SMPs) to cluster due to both magnetic and Van-der-Waals-type forces. The topology of the SMPs in this case can be used to tune both magnetic and rheological properties of the resulting clusters as we show in this work. We employ Molecular Dynamics computer simulations coupled with explicit solvent modelled by Lattice-Boltzmann method in order to model the behaviour of the clusters formed by chains, rings, X- and Y-shaped SMPs in a shear flow with externally applied magnetic field. We find that the shear stabilises the shape of the clusters not letting them extend in the direction of the field and disintegrate. The clusters that show the highest response to an applied field and higher shape stability are those made of Y- and X-like SMPs. © 2023 Elsevier B.V.Russian Science Foundation, RSF: 19-72-10033, SAM P 33748The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Ekaterina Novak reports financial support was provided by Russian Science Foundation. Sofia Kantorovich reports financial support was provided by Austrian Science Fund.This research has been supported by the RSF Grant No.19-72-10033. S.S.K. was partially supported by Project SAM P 33748. Computer simulations were performed at the Vienna Scientific Cluster (VSC) and at the Ural Federal University Cluster.This research has been supported by the RSF Grant No. 19-72-10033 . S.S.K. was partially supported by Project SAM P 33748 . Computer simulations were performed at the Vienna Scientific Cluster (VSC) and at the Ural Federal University Cluster
ЛИПОСОМЫ, МОДИФИЦИРОВАННЫЕ КАТИОННЫМИ ПИРРОЛИДИНИЕВЫМИ ПАВ, ДЛЯ ИНТРАНАЗАЛЬНОЙ ДОСТАВКИ РЕАКТИВАТОРА АЦЕТИЛХОЛИНЭСТЕРАЗЫ В МОЗГ
Get PDFРабота выполнена при финансовой поддержке РНФ № 23-73-10033
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Синтез амфифильных NHC-комплексов палладия на основе n-трет-бутилтиакаликс[4]ареновой платформы
Get PDFВ результате данной работы был осуществлён синтез NHC-комплекса палладия из соли n-трет-бутилимидазолия на тиакаликс[4]ареновой платформе (рисунок). Была исследована каталитическая активность полученного комплекса в реакции кросс-сочетания и проведено сравнение с каталитической активностью ранее синтезированных комплексов.Работа выполнена при поддержке гранта РНФ № 18-73-10033
Multicore-based ferrofluids in zero field: initial magnetic susceptibility and self-assembly mechanisms
Get PDFThe necessity to improve magnetic building blocks in magnetic nano-structured soft materials stems from a fascinating potential these materials have in bio-medical applications and nanofluidics. Along with practical reasons, the interplay of magnetic and steric interactions on one hand, and entropy, on the other, makes magnetic soft matter fundamentally challenging. Recently, in order to tailor magnetic response of the magnetic particle suspensions, the idea arose to replace standard single-core nanoparticles with nano-sized clusters of single-domain nanoparticles (grains) rigidly bound together by solid polymer matrix - multicore magnetic nanoparticles (MMNPs). To pursue this idea, a profound understanding of the MMNP interactions and self-assembly is required. In this work we present a computational study of the MMNP suspensions and elucidate their self-assembly and magnetic susceptibility. We show that depending on the magnetic moment of individual grains the suspensions exhibit qualitatively distinct regimes. Firstly, if the grains are moderately interacting, they contribute to a significant decrease of the remanent magnetisation of MMNPs and as such to a decrease of the magnetic susceptibility, this way confirming previous findings. If the grains are strongly interacting, instead, they serve as anchor points and support formation of grain clusters that span through several MMNPs, leading to MMNP cluster formation and a drastic increase of the initial magnetic response. Both the topology of the clusters and their size distribution in MMNP suspensions is found to be notably different from those formed in conventional magnetic fluids or magnetorheological suspensions. © 2023 The Royal Society of ChemistryRussian Science Foundation, RSF: 19-72-10033, SAM P 33748This research has been supported by the Russian Science Foundation Grant No. 19-72-10033. S. S. K. was partially supported by Project SAM P 33748. Computer simulations were performed at the Ural Federal University cluster
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