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Ponomareva, Valentina G.,Kovalenko, Konstantin A.,Chupakhin, Alexei P.,Dybtsev, Danil N.,Shutova, Elena S.,Fedin, Vladimir P. American Chemical Society 2012 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.134 No.38
<P>The extensive implementation of hydrogen-powered technology today is limited by a number of fundamental problems related to materials research. Fuel-cell hydrogen conversion technology requires proton-conducting materials with high conductivity at intermediate temperatures up to 120 °C. The development of such materials remains challenging because the proton transport of many promising candidates is based on extended microstructures of water molecules, which deteriorate at temperatures above the boiling point. Here we show the impregnation of the mesoporous metal–organic framework (MOF) MIL-101 by nonvolatile acids H<SUB>2</SUB>SO<SUB>4</SUB> and H<SUB>3</SUB>PO<SUB>4</SUB>. Such a simple approach affords solid materials with potent proton-conducting properties at moderate temperatures, which is critically important for the proper function of on-board automobile fuel cells. The proton conductivities of the H<SUB>2</SUB>SO<SUB>4</SUB>@MIL-101 and H<SUB>3</SUB>PO<SUB>4</SUB>@MIL-101 at <I>T</I> = 150 °C and low humidity outperform those of any other MOF-based materials and could be compared with the best proton conductors, such as Nafion.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2012/jacsat.2012.134.issue-38/ja305587n/production/images/medium/ja-2012-05587n_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja305587n'>ACS Electronic Supporting Info</A></P>
Modeling Interregional Clustering in Industry: The Case Study of Russia
Olga P. Smirnova,Alena O. Ponomareva 대한산업공학회 2021 Industrial Engineeering & Management Systems Vol.20 No.4
The paper deals with the relevant problem of industrial development in Russia’s regions. For the economic develop-ment of regions at a qualitatively new level, innovative clusters are an effective form of organizing industrial business. The positive effects of clustering are achieved, first of all, by combining the scientific and production potential of the territory. To model the processes of interregional clustering, the method of spatial econometrics based on Moran’s indices was used. The results of the study show that a number of Russian regions have a high potential for the creation and development of interregional ties. The development of industrial clustering at the interregional level can help to level the socio-economic development of regions. Relations between promising regions and those being sharply inferior to them in development, in the form of clusters, can lead to synergistic effects. It has been established that interregional interaction in traditional industries, such as metallurgy and mechanical engineering, is not always mutually beneficial. Territories of catching-up development can become resource donors in such relations. The authors have noted the priority of supporting interregional clusters, including high-tech enterprises. High-tech manufacturing is an active link in value chains. Therefore, the formation of interregional clustering in this area should become a strategic direction of industrial policy.
Victor N. Vasilets,박기동,Valentina A. Surguchenko,Anna S. Ponomareva,Eugene A. Nemetz,Victor I. Sevastianov,배진우 한국고분자학회 2015 Macromolecular Research Vol.23 No.2
Adhesion and proliferation of NIH/3Т3 mouse fibroblasts on the surfaces of bacterial copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and its mixture with poly(ethylene glycol) with differing crystallinity, surfaceenergy, and mean roughness was investigated. The surface mean roughness of all films on both sides, at the air interfaceand at the glass interface, measured by atomic force microscopy, was higher (from 17.0±1.4 nm to 290.8±7.0 nm)than that of the tissue culture polystyrene control (9.5±0.6 nm). The structure, surface energy, and chemical compositionof bacterial films were studied by differential scanning calorimetry, contact angle measurements, and Fouriertransform infrared (FTIR) spectroscopy. After 48 h, cell proliferation on all surfaces was significantly less than onthe control substrate; however, after 72 and 96 h, cell proliferation was comparable with control on some surfaceswith sufficient roughness. Addition of poly(ethylene glycol) resulted in an increase of adhesion and the metabolicactivity of the cells, even for relatively smooth surfaces. The complex correlation of cell metabolic activity with surfaceenergy and crystallinity for “rough” (mean roughness >100 nm) and “smooth” (mean roughness < 100 nm) surfacesis discussed.
Sergey Nikolaevich Novikov,Petr Krivorotko,Zhanna Bryantseva,Irina Akulova,Alexander Emelyanov,Viktoria Mortada,Olga Ponomareva,Pavel Krzhivitskiy,Sergey Kanaev 대한방사선종양학회 2023 Radiation Oncology Journal Vol.41 No.4
Purpose: We evaluate various approaches to target volume definition and boost delivery in patients with complete response to neoadjuvant systemic therapy (NST) who were treated by radiotherapy without a surgery. Materials and Methods: A pathological complete response (pCR) was diagnosed in 21 of 27 patients included in “surgery de-escalation” prospective observation study. Clips were placed in the primary tumor volume (PrTV) before NST and during the vacuum aspiration biopsy. Twenty patients with pCR underwent the whole breast irradiation and a boost to the PrTV. High-dose rate brachytherapy (HDRB) was the basic technique for boost delivery. Finally, we identified the value of fused images (computed tomography [CT] before NST with simulation CT), clips and their combination for an accurate boost delivery. Results: A complete overlap between PrTV on pre-treatment CT with the localization of the clips on simulation CT was mentioned in 10, partial mismatch in three patients. In 12 of these 13 women, HDRB was successfully used for the boost delivery. In five cases we mentioned a marked discrepancy between the PrTV on fused images and the topography of the clips. In other two women we did not find clips on simulation CT. The fused images in five of these seven patients showed anatomical landmarks (scar, fibrosis) used for identification of the gross tumor volume. In all 20 women with pCR (average follow-up of 16.6 months), there were no locoregional recurrences. Conclusion: Combination of the clips with fusion of pre-NST and simulation CTs is important for an accurate boost delivery.