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Effects of different treatments of films of PIM-1 on its gas permeation parameters and free volume
Polymer. 2021. Vol. 212. Article 123271.
Starannikova L. E., Alentiev A.Yu., Nikiforov R. Y., Ponomarev I. I., Blagodatskikh I. V., Nikolaev A. Y., Shantarovich V. P., Yampolskii Y. P.
Polymer of intrinsic microporosity (PIM-1) was prepared according to a new procedure – precipitation polycondensation in DMSO solution. The permeability coefficients were determined in the “as cast” and ethanol treated samples of this material. It was shown that permeability of the novel polymer is higher than that of PIM-1 samples prepared according to the traditional methods, while selectivity was lower. Free volume in the novel PIM-1 was studied using the PALS technique. Positron life time parameters and the radii of free volume elements were virtually the same as in PIM-1 samples investigated earlier. The samples of novel PIM-1 were subjected to treatment by supercritical CO2 and annealing of free films and films in strained state. The treatment with scCO2 leads qualitatively to the same results as insertion of the films into EtOH (increase in gas permeability) although the observed Pi values are somewhat lower. Annealing of the films in strained and free state causes significant decrease in gas permeability with respect to all the gases but increase in selectivity. This effect is rather strong, so some the data points are even located above the Upper Bound 2008 in Robeson diagrams. Aging of PIM-1 samples for 30–60 days was also studied, and its mechanism is considered.
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Shi R., Yu Y., Chibisov A., International Journal of Hydrogen Energy 2025 Vol. 107 P. 52–62
Cyanide containing wastewater can cause livestock death and reduce agricultural production and electrochemical reduction of cyanide (CNRR) is a promising way to eliminate its harm and turn waste into valuable products. However, the reaction mechanism and function of electrocatalysts for CNRR have not been fully understood yet. Herein we identify a two-dimensional (2D) conductive copper-organic ...
Added: October 11, 2026
Zhukov A., Chen F., Zeng Y. et al., Nanoscale 2026 Vol. 18 No. 36 P. 19223–19253
Colloidal semiconductor nanocrystals have emerged as promising materials for next-generation light-emitting diodes (LEDs) owing to their solution processability, tunable emission wavelengths, narrow emission linewidths, and high photoluminescence quantum yields. Among them, anisotropic nanocrystals, including one-dimensional nanorods (NRs) and two-dimensional nanoplatelets (NPLs), offer additional opportunities for controlling transition dipole moment orientation and light out-coupling efficiency. These ...
Added: October 2, 2026
Мальцева В. Е., Ananyev I., Milevskii N. et al., Molecular Systems Design and Engineering 2026 Vol. 11 No. 7 P. 691–704
The use of hydrophobic deep eutectic solvents (DESs) as extractants for metal ion separation is largely due to the ease of their preparation and the possibility of modifying them depending on the composition of the metal mixture to be separated. However, the most common approach to DES modification involves the replacement of the extractant, while ...
Added: October 2, 2026
Мальцева В. Е., Ananyev I., Golubev A. V. et al., Russian Journal of Inorganic Chemistry 2026 Vol. 71 P. 724–736
Two voluminous polymer silver(I) salts of perchlorinated dodecoborate clusters, {[(Me2CO)Ag(μ-Me2CO)2Ag(Me2CO)][μ-B12Cl12]}n (1) and {[DMFAg(μ-DMF)2AgDMF][μ-B12Cl12]}n (2) were synthesized. The 35Cl nuclear quadrupole resonance (NQR) spectroscopy supplemented with the X-ray diffraction data was applied for identifying and analyzing noncovalent interactions Cl···X in these salts. Whereas in X-ray diffraction, noncovalent interactions are associated with the presence of the shortened ...
Added: October 2, 2026
Мальцева В. Е., Rozhkov A., Ananyev I. et al., Inorganic Chemistry 2026 Vol. 65 No. 22 P. 12484–12496
Despite the well-established importance of chalcogen bonding in crystal engineering and supramolecular chemistry, experimental charge density data for TeII-centered chalcogen bonds have remained entirely absent, leaving the electronic nature of these interactions uncharacterized at the level of directly measured electron density. Here, we report the first high-resolution X-ray diffraction (HRXRD) study of TeII-centered chalcogen bonds, ...
Added: October 2, 2026
Ostovari Moghaddam A., Mehrabi-Kalajahi S., Solizoda I. A. et al., Metals and Materials International 2026 P. 1–9
Off-stoichiometric boron-doped chemically complex intermetallic alloys (CCIMAs) have recently emerged as a new avenue for overcoming the low temperature brittleness of ordered superlattices. However, their behavior at high temperatures remains unexplored. In this study, a novel (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 CCIMA was prepared and its oxidation resistance over a wide temperature range (500 °C–950 °C) was studied. The ...
Added: October 1, 2026
Kashpurovich I., Oleynichenko A., Stegailov V., Supercomputing Frontiers and Innovations 2026 Vol. 13 No. 1 P. 52–73
We report a high-performance implementation of the resolution-of-the-identity Hartree–Fock method that fully exploits the permutational symmetry of three-center electron repulsion integrals (ERI). The present implementation adopts a hybrid MPI+OpenMP parallelization strategy. Two different algorithmic approaches (with and without the pre-transformation of ERIs) are compared. A custom data layout introduced previously is employed. Designed to efficiently ...
Added: September 28, 2026
Li Y., Han J., Zaman N. et al., ACS Applied Materials & Interfaces 2026 Vol. 18 No. 39 P. 54241–54251
The development of lead sulfide (PbS) quantum dot (QD) photodetectors for short-wave infrared (SWIR) applications has been fundamentally limited by the thermodynamic instability of large PbS QD facets, which leads to aggregation and epitaxial fusion. In this work, robust thermodynamic stabilization was achieved by introducing methylammonium chloride (MACl) in PbS QD surface passivation, as validated ...
Added: September 26, 2026
Zaporozhtseva L., Semiotica 2026 P. 1–20
Female aging is a unique cultural phenomenon intertwining universal biological mechanisms, the phenomenological experience of bodily transformation, and semiosis regarding age experience. Throughout their lives, women undergo significant changes in physicality, wherein aging emerges as a natural progression rather than a decline. In numerous traditional cultures, the transformations asso- ciated with female corporeality often remain ...
Added: June 16, 2026
Kriukov D., Efimov E., Kuzmina E. et al., , in: KDD '25: Proceedings of the 31th ACM SIGKDD Conference on Knowledge Discovery and Data Mining. Volume 2.: Association for Computing Machinery (ACM), 2025. P. 5560–5570.
The success of clinical trials of longevity drugs relies heavily on identifying integrative health and aging biomarkers, such as biological age. Epigenetic aging clocks predict the biological age of individuals using their DNA methylation profiles, commonly retrieved from blood samples. However, there is no standardized methodology to validate and compare epigenetic clock models. We propose ComputAgeBench, ...
Added: January 12, 2026
Southwestern University of Finance and Economics Press China, 2026.
Added: December 4, 2025
Бемлер Е. С., Madfes O., Журнал исследований социальной политики 2025 Т. 23 № 4 С. 751–766
The article examines perceptions of aging and scenarios for the future of old age in the
minds of middle-aged people in contemporary Russia. Based on 22 in-depth interviews with
respondents aged 39–60, the study reveals how middle-aged people conceptualize old age, plan
for their old age, and what adaptation strategies they develop to overcome potential difficulties.
The results show ...
Added: May 15, 2025
Dobrushina O., Dobrynina L., Arina G. et al., Emotion 2024 Vol. 24 No. 6 P. 1536–1549
Aging is known to be associated with a decline in interoceptive abilities and changes in emotional processing, including alexithymia. As the brain areas supporting interoceptive awareness participate in the perception of emotion, we suggested that interoceptive decline and alexithymia in older adults may share common neural ground. To test this hypothesis, we administered functional magnetic resonance ...
Added: January 17, 2025
Kuzovchikov S. M., Zefirov V. V., Neudachina V. S. et al., Journal of Power Sources 2024 Vol. 601 Article 234257
Lithium-ion batteries are widely used in portable devices and electric vehicles, and their production grows continuously. Aging is the main reason for battery retirement, which causes substantial waste production and can potentially result in water or soil pollution. Capacity recovery of aged cells could become a great alternative to their recycling. In this work, we ...
Added: March 14, 2024
Malyutina S., Alina Zabolotskaia, Savilov V. et al., Aging, Neuropsychology, and Cognition 2024 Vol. 31 No. 5 P. 795–822
To diagnose mild cognitive impairment, it is crucial to understand whether subjective cognitive complaints reflect objective cognitive deficits. This question has mostly been investigated in the memory domain, with mixed results. Our study was one of the first to address it for language. Participants were 55-to-93-year-old memory clinic patients (n = 163). They filled in a questionnaire ...
Added: October 29, 2023
Abuladze L., Sakkeus L., Selezneva E. et al., Frontiers in Public Health 2023 Vol. 11 Article 1058578
Background: In migration and health research, the healthy migrant effect has been a common finding, but it usually pertains to specific contexts only. Existing findings are inconsistent and inconclusive regarding the cognitive functioning of the (aging) foreign-origin population relative to the populations of their host and sending countries. Moreover, this comparison is an understudied design setting.
Objective: We ...
Added: July 19, 2023
Vyssokikh M., Holtze S., Averina O. et al., Proceedings of the National Academy of Sciences of the United States of America 2020 Vol. 117 No. 12 P. 6491–6501
The mitochondria of various tissues from mice, naked mole rats (NMRs), and bats possess two mechanistically similar systems to prevent the generation of mitochondrial reactive oxygen species (mROS): hexokinases I and II and creatine kinase bound to mitochondrial membranes. Both systems operate in a manner such that one of the kinase substrates (mitochondrial ATP) is ...
Added: December 10, 2022
Yoshikawa K., Maslakov A., Kraev G. et al., Arctic 2022 Vol. 75 No. 2 P. 225–241
Food cellars, otherwise referred to as ice or meat cellars, (lednik in Russian, k’aetyran in Chukchi, siġļuaq in Iñupiaq, and siqlugaq in Yupik) are a natural form of refrigeration in permafrost or seasonally frozen ground used to preserve, age, and ferment foods harvested for subsistence, including marine mammals, birds, fish, and plants. Indigenous peoples throughout the Arctic have constructed cellars in frozen ...
Added: October 26, 2022
А. С. Малышевская, Ф. Галло, А. А. Ефремов et al., Журнал высшей нервной деятельности им. И.П. Павлова 2022 Т. 72 № 5 С. 591–608
Development of science, society and medicine leads to a steady increase in average life expectancy. As a result, science is facing new challenges, including prevention of dementia and the maintenance of efficient brain performance during human aging. Bilingualism is one of the protective factors that prevent cognitive decline and maintain brain neuroplasticity. However, the debate ...
Added: October 18, 2022
Dobrushina O., Dobrynina L., Arina G. et al., Frontiers in Human Neuroscience 2022 Vol. 16 P. 1–12
Aging is associated with decreased functional connectivity in the main brain networks, which can underlie changes in cognitive and emotional processing. Neurofeedback is a promising non-pharmacological approach for the enhancement of brain connectivity. Previously, we showed that a single session of infra-low frequency neurofeedback results in increased connectivity between sensory processing networks in healthy young ...
Added: June 1, 2022
Dobrushina O., Dobrynina L., Arina G. et al., Data in Brief 2022 Article 108257
Interoception is critically important for allostatic adaptation and emotional regulation, and aberrant interoceptive processing is increasingly recognized to be involved in the pathogenesis of neurological, psychiatric and cardiovascular diseases. Despite the fact that interoceptive abilities decline with age, the corresponding neural correlates and clinical consequences of these age-related changes have yet to be discovered. We ...
Added: May 30, 2022
Kozhukhov M., Мухаметдинова А. Р., Проблемы разработки перспективных микро- и наноэлектронных систем (МЭС) 2021 № 4 С. 81–85
A SPICE macromodel of the SiGe HBTs taking into account aging effects is presented. It consists of the standard core model selected by the designer and an additional subcircuit taking into account the hot-carrier effects. The macromodel was included on SPICE-like simulators. The advantages of SPICE-model version of SiGe HBT are high accuracy of description for device ...
Added: November 15, 2021
Gallo F., Kalpouzos G., Laukka E. J. et al., Frontiers in Aging Neuroscience 2021 Vol. 13 Article 737736
Background and Objectives: Cognitive reserve (CR) is meant to account for the mismatch between brain damage and cognitive decline or dementia. Generally, CR has been operationalized using proxy variables indicating exposure to enriching activities ( activity-based CR). An alternative approach defines CR as residual variance in cognition, not explained by the brain status ( residual-based ...
Added: August 30, 2021