Applied Magnetic Resonance最新文献

EPR and luminescence studies of Nd3⁺-Doped CeO2 Nano- and Microcrystals Nd3 +掺杂CeO2纳米微晶的EPR和发光研究

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-11-02 DOI: 10.1007/s00723-026-01892-2

A. K. Ginkel, O. A. Morozov, S. L. Korableva, M. S. Pudovkin, R. M. Rakhmatullin, A. A. Rodionov, V. V. Semashko

{"title":"EPR and luminescence studies of Nd3⁺-Doped CeO2 Nano- and Microcrystals","authors":"A. K. Ginkel, O. A. Morozov, S. L. Korableva, M. S. Pudovkin, R. M. Rakhmatullin, A. A. Rodionov, V. V. Semashko","doi":"10.1007/s00723-026-01892-2","DOIUrl":"10.1007/s00723-026-01892-2","url":null,"abstract":"<div>Here, we present the results of EPR and luminescence studies of Nd3+ ions (0.1%, 0.5%, 1 mol%) doped into CeO2 nano- and microparticles. CeO2:Nd3+ nanoparticles were synthesized via two routes: direct coprecipitation from an aqueous solution, and a conversion method involving the synthesis of CeF3:Nd3+ nanoparticles, followed by annealing in air at 600 °C to form CeO2:Nd3+ nanostructures. Microparticles were prepared by grinding bulk CeF3:Nd3+ crystals with subsequent annealing in air at 600 °C. XRD analysis of all annealed samples confirmed the formation a pure fluorite-type CeO2 structure without secondary phases. The study reveals that the Nd3+ ions doped into CeO2 nanoparticles are located mainly in low-symmetry crystal fields and are EPR-silent. This finding unequivocally demonstrates that the doped Nd3+ ions lack of an eight-fold oxygen environment in the nearest-neighbor positions within the synthesized nanoparticles. In contrast to the nanoparticles, EPR measurements of the microparticles showed that a small fraction of the Nd3⁺ ions occupies distorted cubic symmetry sites retaining an eight-fold oxygen coordination in the nearest-neighbor positions. It is suggested that in all studied samples, the Nd3+ ions primarily occupy trigonal crystal field sites, with charge compensators aligned along the local [111] axis. This aligns with theoretical models indicating that the lowest energy level of Nd3+ in a trigonal field is a \"non-resonant\" doublet (Γ4,5), resulting in a zero-transition probability for any magnetic field orientation. Luminescence measurements support the supposition that the Nd3⁺ ions occupy predominantly low symmetry sites.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"57 11-12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149338467","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

Influence of Cell Type, Label Type, and Recovery Times on In-Cell Pulsed Dipolar Electron Paramagnetic Resonance Spectroscopy Data 电池类型、标签类型和恢复时间对电池内脉冲偶极电子顺磁共振光谱数据的影响

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-11-02 DOI: 10.1007/s00723-026-01889-x

Yannik Limbach, Philipp Schult, Katrin Paeschke, Bela E. Bode, Olav Schiemann

{"title":"Influence of Cell Type, Label Type, and Recovery Times on In-Cell Pulsed Dipolar Electron Paramagnetic Resonance Spectroscopy Data","authors":"Yannik Limbach, Philipp Schult, Katrin Paeschke, Bela E. Bode, Olav Schiemann","doi":"10.1007/s00723-026-01889-x","DOIUrl":"10.1007/s00723-026-01889-x","url":null,"abstract":"<div>In nature, most biomolecules perform their function in a cellular environment. It is therefore important to study their structure–dynamics–function relationships in cells and establish methods that can achieve this. Here, the suitability of pulsed dipolar electron paramagnetic resonance (EPR) spectroscopy (PDS) for such studies is tested in combination with different label and cell types. The model protein GB1 was labeled with either a trityl- or gadolinium-based spin label and transfected via electroporation into two types of mammalian cells, i.e., HeLa and HEK293, and one type of bacterial cells, i.e., E. coli. The in-cell Q-band PDS measurements revealed that both labels remain intact in all three cell types, whereas unspecific binding to the tested cell types was observed for the trityl-labeled protein when used in high concentrations, no such behavior was detectable for the gadolinium label due to its significantly lower sensitivity at Q-band. Interestingly, the modulation depth decreased for both labels with increasing cell recovery time, potentially indicating intracellular protein degradation or aggregation processes. In contrast, E. coli enabled substantially shorter recovery times and yielded PDS data with preserved modulation depth and distance information. Thus, in-cell PDS studies on spin-labeled proteins are particularly useful when combined with E. coli cells.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"57 11-12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00723-026-01889-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149338090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Double Resonance Spectroscopy: Optically Detected Magnetic Resonance and Electron-Nuclear Double Resonance 双共振光谱学：光学探测的磁共振和电子-核双共振

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-10-30 DOI: 10.1007/s00723-026-01888-y

Roman A. Babunts, Pavel G. Baranov, Nikolai G. Romanov

引用次数: 0

Exploring the Case of Exchange Narrowing Absence in EPR Spectrum 探讨EPR频谱中交换窄化缺失的情况

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-10-26 DOI: 10.1007/s00723-026-01882-4

K. M. Salikhov

引用次数: 0

Correction: Bernhard Blümich: On the Occasion of His 70th Birthday 更正：Bernhard bl<e:1> mich：在他70岁生日之际

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-10-20 DOI: 10.1007/s00723-026-01866-4

Matthew Augustine, Peter Blümler, Jeffrey Reimer

引用次数: 0

Applications of Low-Field Nuclear Magnetic Resonance Technology in Petroleum Refining Processes 低场核磁共振技术在石油炼制过程中的应用

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-10-15 DOI: 10.1007/s00723-026-01887-z

Ruiyi Zhang, Yifan Song, Wenjing Cao, Nan Liu, Han Xiao, Xinming Wei, Anshan Xiao

{"title":"Applications of Low-Field Nuclear Magnetic Resonance Technology in Petroleum Refining Processes","authors":"Ruiyi Zhang, Yifan Song, Wenjing Cao, Nan Liu, Han Xiao, Xinming Wei, Anshan Xiao","doi":"10.1007/s00723-026-01887-z","DOIUrl":"10.1007/s00723-026-01887-z","url":null,"abstract":"<div>The extreme complexity of petroleum products makes the detection and monitoring of their physicochemical properties a persistent challenge in petroleum refining. Low-field nuclear magnetic resonance (LF-NMR) technology, particularly time-domain nuclear magnetic resonance (TD-NMR), is a rapid and non-destructive technique for characterizing fluid states and properties and has become a valuable tool for detecting and monitoring state changes during petroleum refining processes. Because it is simple, cost-effective, and requires minimal sample preparation, LF-NMR is well suited to the determination of composition, content and other key physicochemical parameters when ultra-high resolution analysis is not required. This review summarizes the applications of LF-NMR in petroleum refining processes, including physical property determination, chemical composition analysis, mixture analysis and porous material characterization. Current methodological limitations are also discussed, and future directions are proposed to support safer and high-quality refinery operations.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"57 10","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190013","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

EPR Study of Crystal Lattice Distortions in Mn-Doped YGa3(BO3)4 and EuGa3(BO3)4 mn掺杂YGa3(BO3)4和EuGa3(BO3)4晶格畸变的EPR研究

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-10-07 DOI: 10.1007/s00723-026-01886-0

Aleksandr D. Prokhorov, Roman Minikayev, Andrey Prokhorov

引用次数: 0

Correction: Features of Water Proton Relaxation in Saccharide Solutions: The Role of Chemical Exchange and Relaxation Dispersion 修正：水质子在糖溶液中的弛豫特性：化学交换和弛豫分散的作用

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-10-02 DOI: 10.1007/s00723-026-01884-2

Tsukhlova Daria, Melnikova Daria, Shchitova Ekaterina, Tolstoy Peter, Sevryugin Vyacheslav, Skirda Vladimir

引用次数: 0

Optically Detected Cross-Relaxation Resonances in Insulating and Semiconductor Crystals 光学检测的绝缘和半导体晶体的交叉弛豫共振

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-09-26 DOI: 10.1007/s00723-026-01883-3

Roman A. Babunts, Marina V. Muzafarova, Nikolai G. Romanov, Pavel G. Baranov

引用次数: 0

Effect of the Turbo Spin-Echo Factor on T2 Measurement Using the Multi-echo Turbo Spin-Echo Method: A Fast T2 Mapping Protocol Turbo自旋-回波因子对多回波Turbo自旋-回波法T2测量的影响：一种快速T2映射协议

IF 1.3 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2026-09-24 DOI: 10.1007/s00723-026-01885-1

Norikazu Koori, Hiroki Kobayashi, Shohei Yamamoto, Nobukiyo Yoshida, Shin Miyakawa, Kota Sasaki, Hiroki Nosaka, Kenji Yasue, Masato Takahashi, Koichi Hanada, Hajime Ichikawa, Hiraku Fuse

{"title":"Effect of the Turbo Spin-Echo Factor on T2 Measurement Using the Multi-echo Turbo Spin-Echo Method: A Fast T2 Mapping Protocol","authors":"Norikazu Koori, Hiroki Kobayashi, Shohei Yamamoto, Nobukiyo Yoshida, Shin Miyakawa, Kota Sasaki, Hiroki Nosaka, Kenji Yasue, Masato Takahashi, Koichi Hanada, Hajime Ichikawa, Hiraku Fuse","doi":"10.1007/s00723-026-01885-1","DOIUrl":"10.1007/s00723-026-01885-1","url":null,"abstract":"<div>The multi-echo turbo spin-echo (ME-TSE) method shortens acquisition time as the turbo spin-echo (TSE) factor increases; however, its influence on T2 value measurement remains unclear. Using the ME-TSE method, this study evaluated the error rates in T2 measurements caused by TSE factor variation. Sixty-three bottle phantoms were created by combining contrast agent and agar at different concentrations. Imaging was performed on a 1.5-T magnetic resonance imaging system using the multi-echo spin-echo (ME-SE) or ME-TSE method, with the TSE factor ranging from 2 to 10. The relative difference rates for T2 values were calculated based on the difference between each TSE factor and the reference (ME-SE). Higher TSE factors increased relative difference rates in phantoms with shorter T2 values, whereas relative difference rates decreased in phantoms with longer T2 values. Considering the balance between acquisition time and relative error, a TSE factor of 3 was deemed optimal, although it depends on the target T2 value of the measurement.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"57 10","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027645","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