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Bulletin of the Russian Academy of Sciences: Physics最新文献

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Effect of Structural State on the Corrosion Resistance of Pure Magnesium 结构状态对纯镁耐蚀性的影响
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710201
M. A. Shishkunova, D. A. Aksenov, R. N. Asfandiyarov, Yu. R. Sementeeva, D. V. Gunderov, A. A. Churakova
{"title":"Effect of Structural State on the Corrosion Resistance of Pure Magnesium","authors":"M. A. Shishkunova,&nbsp;D. A. Aksenov,&nbsp;R. N. Asfandiyarov,&nbsp;Yu. R. Sementeeva,&nbsp;D. V. Gunderov,&nbsp;A. A. Churakova","doi":"10.1134/S1062873824710201","DOIUrl":"10.1134/S1062873824710201","url":null,"abstract":"<p>The effect of structural state after deformation on the corrosion resistance of pure magnesium was studied. It was found that upsetting by ~10% at a temperature of 150°C of the state annealed after equal channel angular pressing (ECAP) allows one to obtain the best corrosion resistance (11.2 ± 0.6 mm/year) by increasing the density of the twins to 779 × 10<sup>–5</sup> μm<sup>–2</sup>.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"407 - 411"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structure of Hydrogen Complexes in Hydrates of the 1,2-Naphthoquinone Molecule 1,2-萘醌分子水合物中氢配合物的结构
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710286
S. N. Tseplina, E. E. Tseplin
{"title":"Structure of Hydrogen Complexes in Hydrates of the 1,2-Naphthoquinone Molecule","authors":"S. N. Tseplina,&nbsp;E. E. Tseplin","doi":"10.1134/S1062873824710286","DOIUrl":"10.1134/S1062873824710286","url":null,"abstract":"<p>The question of the quantitative composition and structure of the formed hydrogen complexes of the 1,2-naphthoquinone molecule with water molecules in its hydration shell is considered. The problem was solved by comparing the calculated shifts of electronic transitions during the formation of hydrogen complexes with <i>n</i> = 5–13 water molecules with the experimental shifts of the absorption bands of 1,2-naphthoquinone in a water solution compared to a solution in <i>n</i>-hexane.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"445 - 452"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Measuring the Anchoring Energy of Nematic Liquid Crystals in Crossed Magnetic and Electric Fields 向列型液晶在磁场和电场交叉作用下的锚定能测量
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710225
M. V. Khazimullin, Yu. A. Lebedev, A. S. Khoroshavin, D. V. Makarov
{"title":"Measuring the Anchoring Energy of Nematic Liquid Crystals in Crossed Magnetic and Electric Fields","authors":"M. V. Khazimullin,&nbsp;Yu. A. Lebedev,&nbsp;A. S. Khoroshavin,&nbsp;D. V. Makarov","doi":"10.1134/S1062873824710225","DOIUrl":"10.1134/S1062873824710225","url":null,"abstract":"<p>The authors propose a way of determining the anchoring energy of nematic liquid crystals to a substrate by measuring the Fréedericksz threshold in crossed destabilizing magnetic and electric fields.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"417 - 420"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of Functional Brain Connectivity in Children during Solving Cognitive Tasks 儿童解决认知任务时脑功能连通性的特征
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710353
O. V. Piljugin, A. A. Badarin
{"title":"Features of Functional Brain Connectivity in Children during Solving Cognitive Tasks","authors":"O. V. Piljugin,&nbsp;A. A. Badarin","doi":"10.1134/S1062873824710353","DOIUrl":"10.1134/S1062873824710353","url":null,"abstract":"<p>The results of an analysis of phase synchronization of theta brain activity in children when solving problems that involved computational abilities, visual search, and short-term operating memory have been presented. Functional connectivity within the temporal, frontal, central, and occipital-parietal areas of the cerebral cortex using EEG data has been calculated. Significant differences in the dynamics of synchronization of neuronal structures in the frequency range of the theta rhythm, both depending on the brain area and the type of performed task have been found. Significant increases in functional connectivity within prefrontal and temporal regions during visual search tasks have been found.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"482 - 485"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of Quasi-One-Dimensional Conductive Structures in Polymer Layers 聚合物层中准一维导电结构的研究
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710158
V. M. Kornilov, D. D. Karamov
{"title":"Study of Quasi-One-Dimensional Conductive Structures in Polymer Layers","authors":"V. M. Kornilov,&nbsp;D. D. Karamov","doi":"10.1134/S1062873824710158","DOIUrl":"10.1134/S1062873824710158","url":null,"abstract":"<p>An experimental study was made of local switching in submicrometer polymer films, the consequence of which is the appearance of quasi-one-dimensional conductive structures of nanoscopic dimensions. The switching area was visualized using conductive probe atomic force microscopy.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"381 - 385"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Studying the Corrosion Resistance of Ti49.0Ni51.0 Alloy in Different Structural States 不同组织状态下Ti49.0Ni51.0合金的耐蚀性研究
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710195
E. I. Iskhakova, A. A. Churakova
{"title":"Studying the Corrosion Resistance of Ti49.0Ni51.0 Alloy in Different Structural States","authors":"E. I. Iskhakova,&nbsp;A. A. Churakova","doi":"10.1134/S1062873824710195","DOIUrl":"10.1134/S1062873824710195","url":null,"abstract":"<p>The authors study the corrosion resistance of Ti<sub>49.0</sub>Ni<sub>51.0</sub> alloy in its initial coarse-grained state and after preliminary aging. The chosen corrosive media that simulate the biological environment of the body are 0.9% NaCl, Ringer’s, and Hanks’ solutions. It is shown that corrosion in each investigated state is accompanied by pitting and the release of products of corrosion on the surface.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"401 - 406"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of Corrosive-Mechanical Strength of TiNi Alloy in Different Structural States in Biological Solutions 生物溶液中不同结构状态下TiNi合金的腐蚀机械强度特征
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710213
A. A. Churakova, E. I. Iskhakova, E. V. Vorobiev
{"title":"Features of Corrosive-Mechanical Strength of TiNi Alloy in Different Structural States in Biological Solutions","authors":"A. A. Churakova,&nbsp;E. I. Iskhakova,&nbsp;E. V. Vorobiev","doi":"10.1134/S1062873824710213","DOIUrl":"10.1134/S1062873824710213","url":null,"abstract":"<p>We performed the study of the corrosive-mechanical strength and fractographic analysis of fractures of the Ti<sub>49.1</sub>Ni<sub>50.9</sub> alloy in coarse-grained and ultrafine-grained states in biological environments. The study has shown that there is a multidirectional change in the mechanical characteristics of the Ti<sub>49.1</sub>Ni<sub>50.9</sub> alloy in coarse-grained and ultrafine-grained states.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"412 - 416"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radiative Cooling of Long-Lived Molecular Negative Ions of Phenazine 苯那嗪长寿命分子负离子的辐射冷却
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710092
P. V. Shchukin, R. V. Khatymov, M. V. Muftakhov
{"title":"Radiative Cooling of Long-Lived Molecular Negative Ions of Phenazine","authors":"P. V. Shchukin,&nbsp;R. V. Khatymov,&nbsp;M. V. Muftakhov","doi":"10.1134/S1062873824710092","DOIUrl":"10.1134/S1062873824710092","url":null,"abstract":"<p>Based on the harmonic cascade model, the rate constants of radiative cooling of the molecular negative ions of phenazine were calculated. It was determined that radiative cooling of molecular negative ions does not significantly affect the rates of electron autodetachment and makes no distortion to the results of measuring the negative ions lifetime by resonance electron capture mass spectrometry.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"352 - 356"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electron-Stimulated Luminescence of Polycyclic Aromatic Hydrocarbons under Ultrasonic Influence on Terbium Sulfate Suspensions in Solutions of These Hydrocarbons in Decane 超声作用下多环芳烃在硫酸铽溶液中的电子激发发光
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710262
N. A. Panova, A. A. Tukhbatullin, G. L. Sharipov
{"title":"Electron-Stimulated Luminescence of Polycyclic Aromatic Hydrocarbons under Ultrasonic Influence on Terbium Sulfate Suspensions in Solutions of These Hydrocarbons in Decane","authors":"N. A. Panova,&nbsp;A. A. Tukhbatullin,&nbsp;G. L. Sharipov","doi":"10.1134/S1062873824710262","DOIUrl":"10.1134/S1062873824710262","url":null,"abstract":"<p>In the sonotriboluminescence (luminescence arising in suspensions during sonication with intense collisions and destruction of crystals) spectra of lanthanide salts in decane containing polycyclic aromatic hydrocarbons, emission bands of molecules of these hydrocarbons were recorded. Luminescence of aromatic hydrocarbons in suspensions is caused by their excitation by electrons.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"435 - 439"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling of the Influence of the Aquatic Environment on the Energies of Boundary Orbitals of Subnanosized Titanium Dioxide Cluster 水环境对亚纳米二氧化钛团簇边界轨道能量影响的建模
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710274
G. P. Mikhailov
{"title":"Modeling of the Influence of the Aquatic Environment on the Energies of Boundary Orbitals of Subnanosized Titanium Dioxide Cluster","authors":"G. P. Mikhailov","doi":"10.1134/S1062873824710274","DOIUrl":"10.1134/S1062873824710274","url":null,"abstract":"<p>Within the framework of the “quantum theory of atoms in a molecule,” the ionic nature of the bonding of a subnanosized cluster (TiO<sub>2</sub>)<sub>10</sub> with water molecules and the predominant contribution to the binding energy of contacts of the Ti…O type have been established. The influence of water on the energies of boundary orbitals and the energy gap (TiO<sub>2</sub>)<sub>10</sub> within the framework of the model of a polarizable continuum and a discrete hydration shell, as well as temperature accounting using ab initio molecular dynamics, is shown.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"440 - 444"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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