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Assessment of dynamic disorder in DNA oligonucleotides using low-frequency Raman spectroscopy 利用低频拉曼光谱评估 DNA 寡核苷酸的动态无序性
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420402
A.Y. Sosorev, O. D. Parashchuk, A. A. Trubitsyn, N.O. Dubinets, I.V. Chicherin, D. Paraschuk
{"title":"Assessment of dynamic disorder in DNA oligonucleotides using low-frequency Raman spectroscopy","authors":"A.Y. Sosorev, O. D. Parashchuk, A. A. Trubitsyn, N.O. Dubinets, I.V. Chicherin, D. Paraschuk","doi":"10.55959/msu0579-9392.79.2420402","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420402","url":null,"abstract":"The degree of DNA compaction in various regions of the cell nucleus determines whether the corresponding\u0000genes should be expressed, and whether other important cellular processes, such as DNA replication and repair,\u0000should take place. However, approaches to the experimental assessment of the compactness of DNA in cell\u0000nuclei, as well as its indicator, dynamic disorder — thermal fluctuations in the position and mutual orientation\u0000of molecular fragments — are practically not developed. In this paper, using single-stranded oligonucleotides\u0000guanine and cytosine, as well as their double-stranded combination as an example, we show that dynamic\u0000disorder in DNA can be estimated using low-frequency Raman spectroscopy. For the first time, the Raman\u0000spectra of oligonucleotides were measured in a wide range including the low-frequency and high-frequency\u0000regions. It was found that the low-frequency Raman intensity is maximal for single-stranded oligocytosine\u0000and minimal in double-stranded oligonucleotide, in full agreement with the magnitude of dynamic disorder\u0000estimated from the molecular dynamics simulations. The results obtained indicate the prospects of using\u0000low-frequency Raman spectroscopy to assess the dynamic disorder and compactness of DNA. It is expected\u0000that the use of such a technique should contribute to the understanding of key cellular processes and their\u0000underlying physical mechanisms, which is necessary for the development of advanced methods of molecular\u0000biophysics and cell biology.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"12 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141021097","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
Phase transition face-centered cubic crystal — homogeneous phase in helium 面心立方晶体的相变--氦中的均相
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420102
P. N. Nikolaev
{"title":"Phase transition face-centered cubic crystal — homogeneous phase in helium","authors":"P. N. Nikolaev","doi":"10.55959/msu0579-9392.79.2420102","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420102","url":null,"abstract":"In this work, the characteristics of the phase transition face-centered cubic crystal — homogeneous phase in\u0000helium are calculated based on the correlation cell-cluster expansion. The theoretical data were compared\u0000with experimental data and good agreement was obtained. It is discussed the use of data on phase transitions\u0000in helium to estimate thermodynamic characteristics phase transition in a quantum system of hard spheres.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"42 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141022479","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
The burnt gas flow stability of limit flames in vertical tubes 垂直管道中极限火焰的燃烧气流稳定性
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420104
I. A. Gulyaev, K. A. Kazakov
{"title":"The burnt gas flow stability of limit flames in vertical tubes","authors":"I. A. Gulyaev, K. A. Kazakov","doi":"10.55959/msu0579-9392.79.2420104","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420104","url":null,"abstract":"Stability of the gas flows generated by steady near-limit flames propagating in vertical tubes is studied\u0000numerically. Basic scenarios of the burnt gas flow evolution are identified in relation to the thermal gas\u0000expansion parameter and the normal flame speed. It is shown that the realization of specific scenario essentially\u0000depends on the stagnation zone width as well as on the distance travelled by the gas from the flame front\u0000to the tube end. In particular, it is found that for sufficiently short distances, the burnt gas flows are stable\u0000provided that the stagnation zone width is less than half the tube diameter. Otherwise, an unstable flow\u0000evolution can lead to the appearance of recirculation domains and acoustic perturbations.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"1 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141021731","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
Second harmonic generation in structures with inhomogeneous magnetization distribution 非均质磁化分布结构中的二次谐波生成
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420401
I. Kolmychek, V. Novikov, A. Maydykovskiy, T. Murzina
{"title":"Second harmonic generation in structures with inhomogeneous magnetization distribution","authors":"I. Kolmychek, V. Novikov, A. Maydykovskiy, T. Murzina","doi":"10.55959/msu0579-9392.79.2420401","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420401","url":null,"abstract":"The study of the interaction of laser radiation with ferromagnetic materials is not only an inexhaustible\u0000source of new effects, but also provides an opportunity to study magnetic media at the micro- and macroscale. This is especially important for the development of modern technologies to produce structures with\u0000fundamentally new magnetic and optical properties that can’t be observed in natural materials. The review\u0000presents the results of studies of nonlinear optical effects in ferromagnetic nano- and microstructures, as\u0000well as films of different compositions. The unique capabilities of nonlinear-optical diagnostics of anisotropic,\u0000vortex, exchange-biased magnetic structures, visualization of the micromagnetic structure of the surface layers\u0000of ferrite garnets, based both on the high sensitivity of the optical second harmonic generation method to the\u0000magnetic state of nanostructures and interfaces, and on the symmetry properties of high-order magnetizationinduced susceptibility tensor have been demonstrated.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"12 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141018815","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
Two-dimensional transient contrasting structure evolution in an inhomogeneous media with the advection 非均质介质中的二维瞬态对比结构演变与平流
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420101
A. A. Bykov
{"title":"Two-dimensional transient contrasting structure evolution in an inhomogeneous media with the advection","authors":"A. A. Bykov","doi":"10.55959/msu0579-9392.79.2420101","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420101","url":null,"abstract":"The inner transition layer evolution for two-dimensional quasi-linear initial-boundary value problem for the\u0000reaction-advection-diffusion equation in an inhomogeneous media with a small parameter within the high order derivatives is considered. Within the framework of the main (zero order) sum of the asymptotic series,\u0000the position of the inner transition layer is described by the Hamilton–Jacobi equation. The potential is\u0000calculated as an integrated density function of the reaction sources within the limits of the equilibrium levels.\u0000The front line of the transition layer evolves in the same way as the constant-eikonal line (the wavefront\u0000line in the other words) for the problem of wave propagation in an inhomogeneous medium in short-wave\u0000(geometro-optical) asymptotics. The sum of the asymptotic series of zero order and first order is found, the\u0000existence gap of a smooth front line, the time of destruction of the contrasting structure are calculated.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"17 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141018495","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
Effects of wind on deep convection in Lake Baikal duringthe autumnal thermal bar 秋季热压带期间风对贝加尔湖深层对流的影响
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420901
B. Tsydenov, N. S. Trunov, V. V. Churuksaeva, D. V. Degi
{"title":"Effects of wind on deep convection in Lake Baikal during\u0000the autumnal thermal bar","authors":"B. Tsydenov, N. S. Trunov, V. V. Churuksaeva, D. V. Degi","doi":"10.55959/msu0579-9392.79.2420901","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420901","url":null,"abstract":"The results of numerical modeling of processes of deep convection in Lake Baikal during the autumnal thermal\u0000bar are presented. Analysis of the space—time distributions of temperature under different wind conditions\u0000was conducted on an example of the Boldakov River—Maloye More Strait cross-section which is characterised\u0000by the great depths. Simulations have shown the effectiveness of wind only in the upper 250 m layers. However,\u0000cabbeling instability generated by the thermal bar can lead to convective mixing to a depth of ∼600 m.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"4 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019050","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
Electric dipole polarizability of magic nuclei 魔核的电偶极化性
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420204
N. Arsenyev, A. Severyukhin
{"title":"Electric dipole polarizability of magic nuclei","authors":"N. Arsenyev, A. Severyukhin","doi":"10.55959/msu0579-9392.79.2420204","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420204","url":null,"abstract":"The correlations between the electric dipole polarizability and neutron skin thickness are studied by the\u0000magic nuclei 40,48Ca, 68,78Ni, 132Sn, and 208Pb. The strength distribution of the E1 transitions is calculated\u0000within the random phase approximation model based on the Skyrme nuclear energy density functional.\u0000A comparison with the experimental data has allowed us to constrain the value of the nuclear symmetry\u0000energy J = 30–37 MeV.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"8 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141021280","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
Simulation of emission of the flare 27.04.2012 in spectral lines of Hydrogen, Helium and Calcium 模拟 2012 年 4 月 27 日耀斑在氢、氦和钙谱线中的发射情况
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420801
Y. Kupryakov, K. Bychkov, O. M. Belova, V. A. Maliutin, A. B. Gorshkov
{"title":"Simulation of emission of the flare 27.04.2012 in spectral lines of Hydrogen, Helium and Calcium","authors":"Y. Kupryakov, K. Bychkov, O. M. Belova, V. A. Maliutin, A. B. Gorshkov","doi":"10.55959/msu0579-9392.79.2420801","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420801","url":null,"abstract":"Тhe article is devoted to analyses of solar flare SOL2012-04-27 emission in Hydrogen, Helium and Calcium\u0000spectral lines observed on horizontal solar equipment HSFA-2 in Ondˇrejov observatory. The integrated fluxes\u0000are calculated. The data collected are treated in the approach of the fast energy release followed by gas\u0000evaporation. The gas parameters are calculated with chromosphere conditions and spectral line self-absorption\u0000taken into account. Encompassing of six lines allows to reveal the temperature, density and extent of the gas\u0000with high degree of validity. The best agreement of the theory with observations is obtained in the model\u0000of the spread of inhomogeneous clouds, each of which has hot (T ≈ 18000 ÷ 19500 K) and cool regions\u0000(T ≈ 8000 ÷ 9000 K). On average, one cloud gives about ten percent of the total flux.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"18 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141018704","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
Beam Scanning System for an Industrial Electron Accelerator 用于工业电子加速器的光束扫描系统
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2421001
M. A. Borisov, V. Shvedunov
{"title":"Beam Scanning System for an Industrial Electron Accelerator","authors":"M. A. Borisov, V. Shvedunov","doi":"10.55959/msu0579-9392.79.2421001","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2421001","url":null,"abstract":"To create a compact system for scanning the beam along the conveyor, this paper considers the horizontal\u0000placement of the accelerator with a magnetic system with rotating the beam by 90◦\u0000. A three-dimensional\u0000simulation of the magnetic system and the dynamics of electrons in it was performed. Dose distributions\u0000were also obtained in the near-surface region of the irradiated object, on the basis of which the optimal laws\u0000of change in the current and voltage of the scanning magnet were determined, which provide the required\u0000conditions for irradiating the product","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"29 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141022961","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
Constancy of stabilized Randall-Sundrum model with respect to quantum corrections 稳定的兰德尔-桑德鲁姆模型在量子修正方面的恒定性
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420103
I. P. Volobuev, S. Keizerov, E. Rakhmetov
{"title":"Constancy of stabilized Randall-Sundrum model with respect to quantum corrections","authors":"I. P. Volobuev, S. Keizerov, E. Rakhmetov","doi":"10.55959/msu0579-9392.79.2420103","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420103","url":null,"abstract":"In the Randall-Sundrum model stabilized with the help of the Goldberger-Wise scalar field, the lowest order\u0000vacuum quantum corrections to the energy-momentum tensor of the scalar and tensor fields are calculated.\u0000It is shown that the corresponding vacuum energy density of the fields in the bulk leads to the Casimir\u0000effect. Using the dimensional regularization method and the Abel-Plana formula, the divergences have been\u0000isolated and the vacuum energy density has been renormalized. An analytical expression for the Casimir force\u0000is obtained and an estimate of its influence on the model parameters is made. It was found that the quantum\u0000corrections lead only to a negligibly small decrease in the distance between the branes, i.e. the model possesses\u0000constancy with respect to quantum corrections.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"4 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141021218","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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