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Bulletin of the Lebedev Physics Institute最新文献

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Enhanced Antibacterial and Anticancer Activities of Vanadium-Doped ZnO Nanoparticles: Effect of Doping Concentration 钒掺杂ZnO纳米颗粒增强抗菌和抗癌活性：掺杂浓度的影响
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602535
M. Divya Gnaneswari, C. Raghavan, L. Bruno Chandrasekar, M. Karunakaran, L. Saravanan, S. Vimal, Saravanan Rajendran, Sonaimuthu Mohandoss, Subramanian Palanisamy, J. Thirumalai, P. Shunmuga Sundaram
{"title":"Enhanced Antibacterial and Anticancer Activities of Vanadium-Doped ZnO Nanoparticles: Effect of Doping Concentration","authors":"M. Divya Gnaneswari,&nbsp;C. Raghavan,&nbsp;L. Bruno Chandrasekar,&nbsp;M. Karunakaran,&nbsp;L. Saravanan,&nbsp;S. Vimal,&nbsp;Saravanan Rajendran,&nbsp;Sonaimuthu Mohandoss,&nbsp;Subramanian Palanisamy,&nbsp;J. Thirumalai,&nbsp;P. Shunmuga Sundaram","doi":"10.3103/S1068335625602535","DOIUrl":"10.3103/S1068335625602535","url":null,"abstract":"<p>Vanadium-doped zinc oxide nanoparticles are synthesized by the hydrothermal method with different doping concentrations. The main objective of the research is to analyze the role of doping concentration against septicemia and human colon cancer. The prepared nanoparticles are extensively characterized by the X-ray diffraction technique. The crystallite size, stain, lattice constants, and bond lengths are examined. The vanadium doping enhances the antibacterial activity against bacterial strains. The in vitro anticancer activity of the prepared nanoparticles is tested by MTT assay, EtBr and DAPI staining. The concentration-dependent enhancement in the antitumor activity is observed in human colon cancer cells by inducing apoptosis. The change in cell morphology and the induction of apoptosis is also observed in our study. This interesting finding will undoubtedly make substantial contributions to developing successful therapeutic agents for septicemia and colon cancer.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"395 - 408"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Targeted Wavelength-Dispersive Absorption Spectrometry of the K-Jump Region of X-ray Photoabsorption of a Contrasting Element in an Object 物体中对比元素x射线光吸收k跳区的靶波长色散吸收光谱
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602304
A. G. Turyanskiy, Kyaw Zaw Lin, V. M. Senkov, M. Z. Ziyatdinova
{"title":"Targeted Wavelength-Dispersive Absorption Spectrometry of the K-Jump Region of X-ray Photoabsorption of a Contrasting Element in an Object","authors":"A. G. Turyanskiy,&nbsp;Kyaw Zaw Lin,&nbsp;V. M. Senkov,&nbsp;M. Z. Ziyatdinova","doi":"10.3103/S1068335625602304","DOIUrl":"10.3103/S1068335625602304","url":null,"abstract":"<p>A wavelength-dispersive technique of targeted absorption spectrometry of the <i>K</i>-jump region of X-ray photoabsorption during diffraction of a collimated polychromatic beam in a mosaic texture of highly oriented pyrographite is proposed. Comparative results of measuring the absorption spectra of Br in an aqueous solution of KBr by wavelength-dispersive and energy-dispersive methods with a silicon drift detector (SDD) are presented. This scheme makes it possible to reach an energy resolution of Δ<i>E</i>/<i>E</i> ~ 10<sup>‒3</sup> and can be used in laboratory practice and medical and biological diagnostics to determine the content of contrasting agents and study the dynamics of their transfer under stationary and repetitively pulsed irradiation regimes.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"372 - 376"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Current Beams of Relativistic Electrons at Direct Laser Acceleration in Near-Critical Density Plasma 近临界密度等离子体中直接激光加速下的相对论性电子大电流束
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602997
M. E. Veisman, V. S. Popov, S. V. Kuznetsov, I. R. Umarov, N. E. Andreev
{"title":"High-Current Beams of Relativistic Electrons at Direct Laser Acceleration in Near-Critical Density Plasma","authors":"M. E. Veisman,&nbsp;V. S. Popov,&nbsp;S. V. Kuznetsov,&nbsp;I. R. Umarov,&nbsp;N. E. Andreev","doi":"10.3103/S1068335625602997","DOIUrl":"10.3103/S1068335625602997","url":null,"abstract":"<p>The results of particle-in-cell (PIC) simulation of the effect of intense laser pulses (peak intensities of 10<sup>19</sup> to 10<sup>21</sup> W/cm<sup>2</sup>) on near-critical density (NCD) plasma have been analyzed. As they propagate through NCD plasma, these laser pulses create an ion channel with lower electron density and strong quasi-stationary fields. Radial inhomogeneity of the electron density creates a radial electrostatic field due to the ponderomotive expulsion of background plasma electrons from the channel. At the same time, the current of accelerated electrons generates an azimuthal magnetic field. In direct laser acceleration (DLA), relativistic electrons trapped in the channel by focusing quasi-stationary fields experience transverse betatron oscillations and gain energy efficiently from the laser pulse when the frequency of the betatron oscillations becomes resonant with the Doppler shifted laser frequency. The potential for producing electron bunches with energies of tens of megaelectronvolts and charges of hundreds of nanocoulombs using DLA in NCD-plasma has been demonstrated. It is shown that the energy spectra of accelerated electrons can be approximated by Maxwell distributions. A scaling is proposed for the dependence of the effective temperature of “superponderomotive” electrons on the laser pulse and plasma parameters.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S462 - S473"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Changes in the Optical Absorption Coefficient and Refractive Index of Monolayer Germanene in the Magnetic Field 磁场作用下单层锗烯光吸收系数和折射率的变化
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602171
Do Muoi
{"title":"Changes in the Optical Absorption Coefficient and Refractive Index of Monolayer Germanene in the Magnetic Field","authors":"Do Muoi","doi":"10.3103/S1068335625602171","DOIUrl":"10.3103/S1068335625602171","url":null,"abstract":"<p>In this study, we conduct a theoretical analysis of the optical absorption coefficients (OACs) and refractive index changes (RICs) arising from intraband and interband transitions in monolayer germanene under the influence of a magnetic field. The findings reveal that both OACs and RICs blueshift as the magnetic field strength increases. Notably, the peaks associated with spin-up states consistently appear to the right of those corresponding to spin-down states. This distinction in peak positions is attributed to the strong spin–orbit coupling (SOC) characteristic of monolayer germanene. For intraband transitions, the OACs and RICs exhibit a single peak in the terahertz (THz) region. Moreover, interband transitions give rise to multiple peaks, spanning from the high THz range to the low far-infrared range, underscoring the promising potential of monolayer germanene for optoelectronic applications.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"351 - 360"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scintillation Characteristics of the Lu2SiO5‒z:Y3+:Ce3+:Ca2+ Crystal Module Lu2SiO5-z:Y3+:Ce3+:Ca2+晶体模块的闪烁特性
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602055
A. I. Zagumennyi, M. V. Belov, V. I. Vlasov, Yu. D. Zavartsev, M. V. Zavertyaev, V. A. Kozlov, N. V. Pestovskii, S. Yu. Savinov, V. S. Tskhay
{"title":"Scintillation Characteristics of the Lu2SiO5‒z:Y3+:Ce3+:Ca2+ Crystal Module","authors":"A. I. Zagumennyi,&nbsp;M. V. Belov,&nbsp;V. I. Vlasov,&nbsp;Yu. D. Zavartsev,&nbsp;M. V. Zavertyaev,&nbsp;V. A. Kozlov,&nbsp;N. V. Pestovskii,&nbsp;S. Yu. Savinov,&nbsp;V. S. Tskhay","doi":"10.3103/S1068335625602055","DOIUrl":"10.3103/S1068335625602055","url":null,"abstract":"<p>We report an investigation of optical and scintillation characteristics of a prototype module of an electromagnetic calorimeter based on a Lu<sub>2</sub>SiO<sub>5‒<i>z</i></sub>:Y<sup>3+</sup>:Ce<sup>3+</sup>:Ca<sup>2+</sup> crystal with the size of 20 × 20 × 90 mm<sup>3</sup> and grown by the Czochralski method. The scintillation decay time of the crystal module excited by gamma quanta by a <sup>137</sup>Cs source is obtained. The energy resolution of the crystal module is estimated by simulating it with the GEANT4 program.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 8","pages":"367 - 371"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Difference in Manifestation of Light-Induced Drift Effect of Cesium Atoms for Two Known Interatomic Potentials 两种已知原子间电位下铯原子光致漂移效应表现的差异
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602973
A. I. Parkhomenko, A. M. Shalagin
{"title":"Difference in Manifestation of Light-Induced Drift Effect of Cesium Atoms for Two Known Interatomic Potentials","authors":"A. I. Parkhomenko,&nbsp;A. M. Shalagin","doi":"10.3103/S1068335625602973","DOIUrl":"10.3103/S1068335625602973","url":null,"abstract":"<p>Based on two different nonempirical (calculated ab initio) interatomic potentials, we study the sensitivity of the line shape of the anomalous light-induced drift (LID) to the difference in interaction potentials using Cs atoms as an example and taking into account the real level structure in the atmosphere of inert buffer gases He, Ne, and Xe. It is found that even a slight difference in the interatomic potentials strongly manifests itself in the frequency dependence of the drift velocity in the region of the anomalous LID. The obtained results make it possible to perform high-precision testing of interatomic potentials based on experiments on the anomalous LID of Cs atoms.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S451 - S461"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Embryo Trophectoderm Cell Biopsy Using Femtosecond Laser Pulses 利用飞秒激光脉冲进行胚胎滋养外胚层细胞活检
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602961
D. S. Sitnikov, P. D. Safonova, D. M. Dolmatova, M. A. Filatov
{"title":"Embryo Trophectoderm Cell Biopsy Using Femtosecond Laser Pulses","authors":"D. S. Sitnikov,&nbsp;P. D. Safonova,&nbsp;D. M. Dolmatova,&nbsp;M. A. Filatov","doi":"10.3103/S1068335625602961","DOIUrl":"10.3103/S1068335625602961","url":null,"abstract":"<p>The use of millisecond laser sources has become an essential part of clinical practice in assisted reproductive technologies. The biopsy of embryos at the blastocyst stage is one of the challenges addressed in reproductive medicine. We have examined the feasibility of applying femtosecond laser pulses (with a duration of 280 fs and a radiation wavelength of 514 nm) and their effectiveness in solving this problem. The biopsy procedure was performed using micropipettes as part of a standard clinical protocol. It is demonstrated that pulses with an intensity of 4 to 6 TW/cm<sup>2</sup> can be used to separate bioptate cells. The outcomes of exposure in different regimes (from a single pulse to a sequence of pulses) are presented.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S419 - S428"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Soliton Regime of Second Harmonic Generation in the Presence of Quasi-Resonant Impurities 准谐振杂质存在下二次谐波产生的孤子域
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602985
S. V. Sazonov
{"title":"Soliton Regime of Second Harmonic Generation in the Presence of Quasi-Resonant Impurities","authors":"S. V. Sazonov","doi":"10.3103/S1068335625602985","DOIUrl":"10.3103/S1068335625602985","url":null,"abstract":"<p>We report a study of a soliton-like regime of second harmonic generation in a crystal containing impurity atoms with a quantum transition, which is quasi-resonant with respect to a laser pulse at the fundamental frequency. Mismatches of phase and group velocities are taken into account. It is shown that quasi-resonant impurities, on the one hand, lead to a decrease in the generation efficiency, and, on the other hand, they are capable of creating conditions for the implementation of a two-frequency soliton regime, which is impossible in their absence.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S388 - S395"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pyrolysis of Coals Exposed to Nanosecond First- and Second-Harmonic Pulses from a Neodymium Laser 煤在纳秒级钕激光一、二次谐波脉冲下的热解研究
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602328
B. P. Aduev, V. D. Volkov, A. Yu. Mitrofanov
{"title":"Pyrolysis of Coals Exposed to Nanosecond First- and Second-Harmonic Pulses from a Neodymium Laser","authors":"B. P. Aduev,&nbsp;V. D. Volkov,&nbsp;A. Yu. Mitrofanov","doi":"10.3103/S1068335625602328","DOIUrl":"10.3103/S1068335625602328","url":null,"abstract":"<p>We report a comparative study of the impact of repetitively pulsed neodymium laser radiation of the first (λ<sub>1</sub> = 1064 nm, τ<sub>1</sub> = 12 ns) and second (λ<sub>2</sub> = 532 nm, τ<sub>2</sub> = 10 ns) harmonics on tableted microparticles of brown (2B), gas (G), and fat (Zh) coals. The concentration of synthesis gas molecules formed when microparticles of hard coals are exposed to laser pulses of the same energy density is higher in the case of the second-harmonic radiation. The concentration of synthesis gas molecules formed when microparticles of coals are exposed to first- and second-harmonic pulses of the same intensity is the same. A model is proposed to explain the nonlinear dependence of the synthesis gas yield on the intensity of laser pulses, based on the nonlinear generation of primary centers of thermochemical reactions formed during optical breakdown of coal samples and generation of laser-induced plasma. The spectral intensity of the laser-induced plasma glow when tableted samples of coal microparticles are irradiated by the second-harmonic laser pulses is higher than that during irradiation by the first-harmonic pulses, with radiation energy densities being the same.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S441 - S450"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of Radiation Stability of UV Optical Materials for Thermonuclear Power Plant with KrF Laser Driver at a Linear 10-MeV Electron Accelerator. Part II. Electron-Beam Induced Absorption in Samples 用KrF激光在10-MeV直线电子加速器上研究热核电厂用紫外光学材料的辐射稳定性。第二部分。样品中的电子束诱导吸收
IF 0.7 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-09-21 DOI: 10.3103/S1068335625602936
V. D. Zvorykin, S. V. Arlantsev, V. V. Khankin, V. I. Shvedunov, N. N. Ustinovskii
{"title":"Investigation of Radiation Stability of UV Optical Materials for Thermonuclear Power Plant with KrF Laser Driver at a Linear 10-MeV Electron Accelerator. Part II. Electron-Beam Induced Absorption in Samples","authors":"V. D. Zvorykin,&nbsp;S. V. Arlantsev,&nbsp;V. V. Khankin,&nbsp;V. I. Shvedunov,&nbsp;N. N. Ustinovskii","doi":"10.3103/S1068335625602936","DOIUrl":"10.3103/S1068335625602936","url":null,"abstract":"<p>Long-lived electron-beam-induced absorption in a number of UV-optical materials for windows and multilayer coatings of inertial fusion energy reactor and promising KrF laser driver was studied using a pulsed linear electron accelerator with electron energy of 10 MeV. In testing high-purity samples of quartz glasses Corning 7980, KU-1, and KS-4V, as well as crystals of calcium fluoride, magnesium fluoride, and leucosapphire the radiation dose of 18.2 MGy, was comparable to the dose absorbed by windows of KrF electron-beam-pumped laser driver operating for 1 year with a pulse repetition rate of 5 Hz. Quartz glass KS-4V with an admixture of OH showed the lowest absorption with a coefficient of 0.4 cm<sup>–1</sup> at a wavelength of 248 nm among all other glasses. Rather high absorption with a coefficient of 4 cm<sup>–1</sup> in calcium fluoride is effectively bleached by the own KrF laser radiation.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 4 supplement","pages":"S351 - S363"},"PeriodicalIF":0.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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