Applied Magnetic Resonance最新文献

Autobiography 自传

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-11-16 DOI: 10.1007/s00723-024-01705-4

Carlo Corvaja

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Carlo Corvaja: On the Occasion of His 85th Birthday 卡洛-科瓦哈在他 85 岁生日之际

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-11-15 DOI: 10.1007/s00723-024-01728-x

Lorenzo Franco, Marco Ruzzi

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Challenges of Continuous Wave EPR of Broad Signals—The Ferritin Case 宽信号连续波 EPR 的挑战--铁蛋白案例

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-10-26 DOI: 10.1007/s00723-024-01719-y

Fabio Seiji Otsuka, Maria Concepción García Otaduy, Otaciro Rangel Nascimento, Carlos Ernesto Garrido Salmon, Martina Huber

{"title":"Challenges of Continuous Wave EPR of Broad Signals—The Ferritin Case","authors":"Fabio Seiji Otsuka, Maria Concepción García Otaduy, Otaciro Rangel Nascimento, Carlos Ernesto Garrido Salmon, Martina Huber","doi":"10.1007/s00723-024-01719-y","DOIUrl":"10.1007/s00723-024-01719-y","url":null,"abstract":"<div>The study of continuous wave (cw) electron paramagnetic resonance (EPR) spectra still poses a challenge for very broad signals, especially when the spectrum extends over a large part of the accessible field range. The difficulties derive from instrumental challenges, because of insufficient modulation depth and the need to apply measurement conditions that enhance cavity background. The biggest problem, however, is how to define a baseline such that spectral distortions are minimized. Conventional methods rely on a suitable choice of points outside the range of the signal of interest to perform a polynomial interpolation. These methods are effective in most cases where the signal of interest comprises only a narrow range of magnetic field (narrow features). In this study, a novel method of baseline correction for broad signals is proposed and compared to conventional methods. It takes into account that there are only few anchor points for the baseline. The method is applied to the signal of the iron-storage protein ferritin. The ferritin signal is a broad band that extends from zero to 0.8 T. An approach is developed by which this broad signal is analyzed reliably. The method is also extended to the case where the broad signal is superimposed on narrow signals and enables to extract the parameters of both types of signals in a fitting pipeline.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"55 12","pages":"1605 - 1620"},"PeriodicalIF":1.1,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00723-024-01719-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679583","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}

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Deep-Learning Segmentation of Bleomycin-Induced Pulmonary Fibrosis in Rats Using U-Net 3 + by 3D UTE-MRI 利用 U-Net 3 + 3D UTE-MRI 对博莱霉素诱导的大鼠肺纤维化进行深度学习分割

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-09-28 DOI: 10.1007/s00723-024-01721-4

T. V. Taran, O. S. Pavlova, M. V. Gulyaev, E. V. Ivanov, Y. A. Pirogov

{"title":"Deep-Learning Segmentation of Bleomycin-Induced Pulmonary Fibrosis in Rats Using U-Net 3 + by 3D UTE-MRI","authors":"T. V. Taran, O. S. Pavlova, M. V. Gulyaev, E. V. Ivanov, Y. A. Pirogov","doi":"10.1007/s00723-024-01721-4","DOIUrl":"10.1007/s00723-024-01721-4","url":null,"abstract":"<div>This study utilized the U-Net 3 + neural network to develop an algorithm for automatic lung segmentation in laboratory rats, identifying corresponding pathologies, particularly pulmonary fibrosis induced by intratracheal administration of bleomycin. MR images of rat lungs were obtained in 30 days after initialization of the fibrosis at 7 T using ultra-short echo time (UTE) pulse sequence. Initially, lung and pathology masks were highlighted manually, and then they were subsequently used to train the neural network. The proposed algorithm operates step by step, firstly segmenting the lungs and then detecting pathologies within them. The metric results demonstrate a good agreement between manual and automatic segmentation, with Dice Similarity Coefficient (DSC) = 0.93 ± 0.05 and Intersection over Union (IoU) = 0.83 ± 0.19 for the lungs, and DSC = 0.72 ± 0.19, IoU = 0.54 ± 0.22 for pulmonary fibrosis. The authors noted high accuracy in lung segmentation and the ability to effectively differentiate lung pathologies from surrounding normal tissues with minor inaccuracies in the shape and size of pathologies.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"55 11","pages":"1455 - 1465"},"PeriodicalIF":1.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142447293","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 Ge concentration on magnetic properties of (hbox {Co}_{(1-x)} hbox {Ge}_{x}) thin films Ge 浓度对 (hbox {Co}_{(1-x)}hbox {Ge}_{x}) 薄膜磁性能的影响

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-09-21 DOI: 10.1007/s00723-024-01717-0

M. Tokaç, H. Pişkin, B. Özkal, K. Yıldız Aktaş, B. Kocaman, L. Çolakerol Arslan, B. Rameev, S. Kazan

{"title":"Influence of Ge concentration on magnetic properties of (hbox {Co}_{(1-x)} hbox {Ge}_{x}) thin films","authors":"M. Tokaç, H. Pişkin, B. Özkal, K. Yıldız Aktaş, B. Kocaman, L. Çolakerol Arslan, B. Rameev, S. Kazan","doi":"10.1007/s00723-024-01717-0","DOIUrl":"10.1007/s00723-024-01717-0","url":null,"abstract":"<div>Cobalt-rich (hbox {Co}_{(1-x)} hbox {Ge}_{x}) alloy thin films with various Ge concentrations (up to ({x} = 0.09)) have been investigated by vibrating sample magnetometry and ferromagnetic resonance techniques to understand the influence of Ge doping on magnetostatic and magnetodynamic properties. Room-temperature magnetization curves have shown that the addition of Ge atoms can reduce the saturation magnetization in a fast manner. Utilizing a conventional ferromagnetic resonance setup, the out-of-plane angular dependencies of the resonance spectra have been measured and data have been analyzed using a computer program to simulate the magnetic behavior of the thin-film alloys. The experimental findings demonstrate that the magnetic properties of (hbox {Co}_{(1-x)} hbox {Ge}_{x}) alloys can be precisely adjusted by varying the Ge content. Both the g-factor and the Gilbert-damping parameter show correlated changes, highlighting the tunability of these magnetic characteristics. This ability to modify saturation magnetization and damping parameters by altering the Ge concentration enables the optimization and customization of the alloy for specific applications in spintronic devices.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"55 11","pages":"1421 - 1435"},"PeriodicalIF":1.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142447346","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

A Method for Analyzing Data from 1- and 2-Dimensional Relaxation and Diffusion NMR Experiments by Determination of their Expectation Values and Standard Deviations 通过确定期望值和标准偏差分析一维和二维弛豫与扩散 NMR 实验数据的方法

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-09-20 DOI: 10.1007/s00723-024-01718-z

Geir Humborstad Sørland, Henrik Walbye Anthonsen, Sebastien Simon

引用次数: 0

Photocurrent EDMR Measurement and Carrier Behavior of TIPS-Pentacene Under FET Device Operation FET 器件工作时 TIPS-Pentacene 的光电流 EDMR 测量和载流子行为

IF 1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-09-15 DOI: 10.1007/s00723-024-01715-2

Hina Kobayashi, Michio M. Matsushita, Ken Kato, Masazumi Fujiwara, Yoshio Teki

{"title":"Photocurrent EDMR Measurement and Carrier Behavior of TIPS-Pentacene Under FET Device Operation","authors":"Hina Kobayashi, Michio M. Matsushita, Ken Kato, Masazumi Fujiwara, Yoshio Teki","doi":"10.1007/s00723-024-01715-2","DOIUrl":"https://doi.org/10.1007/s00723-024-01715-2","url":null,"abstract":"The carrier dynamics of the organic semiconductor materials plays very important role in the device applications, because it is strongly related to the device performance. We report the electrically detected magnetic resonance (EDMR) study of a drop-casted film of 6,13–bis((triisopropylsilyl)ethynyl)pentacene (TIPS-Pn) under the field-effect transistor (FET) device operating condition. The EDMR signal could not be observed without light-irradiation even under the FET device operating condition (carrier injected condition). This means that the electrically injected carries (e–h pair) do not have spin polarization and notable spin-selective pathway after the charge injection. Under the light irradiation, the EDMR signals were detected in the FET device both with and without the VGS (gate-source voltage applied to the FET device) and the intensity depended on the VGS. When 0 > VGS > VTH, which is near the threshold voltage of the carrier injection, the signal intensity increased with increasing |VGS| but in the region VGS < VTH (|VGS| >|VTH|), the EDMR intensity decreased. This phenomenon has been reproduced by solving the rate equations assuming the re-combination between the photo generated electron (pe) and the injected hole (h), which is strong related to the device structures.","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"43 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256558","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

Nitroxide Spin Labels for Exploring Relationships Between Molecular Structure, Microenvironment and EPR Parameters: A Mini-review Dedicated to Carlo Corvaja 用于探索分子结构、微环境和 EPR 参数之间关系的亚硝基自旋标签：献给 Carlo Corvaja 的微型综述

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-09-14 DOI: 10.1007/s00723-024-01713-4

Klaus Möbius, Anton Savitsky, Martin Plato, Wolfgang Lubitz

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Electrocatalytic Radical Degradation of 2-Aminoethanol by Nickel, Palladium and Platinum Complexes Bearing Non-Innocent Diarylamido/bis(Phosphine) Pincer Ligand 含有非无害二酰胺基/双（膦）钳配体的镍、钯和铂配合物对 2-氨基乙醇的电催化自由基降解作用

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-09-13 DOI: 10.1007/s00723-024-01710-7

Ilya K. Mikhailov, Zufar N. Gafurov, Alexey A. Kagilev, Il’yas F. Sakhapov, Vladimir I. Morozov, Gumar R. Ganeev, Khasan R. Khayarov, Vasilisa A. Kulikova, Vladislava A. Kirkina, Evgenii I. Gutsul, Elena S. Shubina, Natalia V. Belkova, Oleg G. Sinyashin, Dmitry G. Yakhvarov

{"title":"Electrocatalytic Radical Degradation of 2-Aminoethanol by Nickel, Palladium and Platinum Complexes Bearing Non-Innocent Diarylamido/bis(Phosphine) Pincer Ligand","authors":"Ilya K. Mikhailov, Zufar N. Gafurov, Alexey A. Kagilev, Il’yas F. Sakhapov, Vladimir I. Morozov, Gumar R. Ganeev, Khasan R. Khayarov, Vasilisa A. Kulikova, Vladislava A. Kirkina, Evgenii I. Gutsul, Elena S. Shubina, Natalia V. Belkova, Oleg G. Sinyashin, Dmitry G. Yakhvarov","doi":"10.1007/s00723-024-01710-7","DOIUrl":"10.1007/s00723-024-01710-7","url":null,"abstract":"<div>The electrocatalytic activity of PNP pincer complexes with general formula (PNP)MCl (PNP is bis(2-diisopropylphosphino-4-methylphenyl)amide; M = nickel, palladium and platinum) in the oxidative 2-aminoethanol (MEA, a recalcitrant pollutant) degradation process was studied using cyclic voltammetry method. Complexes fulfil the requirements typically expected of a redox mediator or catalyst. Their electrochemical oxidation yields the aminyl radical species which unpaired electron is localized on the ligand. The mechanism of interaction of these aminyl radical complexes with MEA was studied using ESR- and NMR-spectroscopy methods. The addition of MEA to the solution of model platinum derivative leads to the disappearance of the ESR signal responsible for the aminyl radical complex, whereas the 31P{1H} NMR spectrum revealed the regeneration of neutral (PNP)MCl. Palladium derivative was found to be the most effective catalyst of the series with an Icat/Ip value of 6.7. Controlled potential electrolysis has allowed us to identify the main products of the catalytic process and to propose the mechanism of the overall process.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"55 10","pages":"1323 - 1333"},"PeriodicalIF":1.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204654","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}

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Magnetic Resonance Methods in Catalysis 催化中的磁共振方法

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2024-09-12 DOI: 10.1007/s00723-024-01712-5

Oleg N. Martyanov, Daniil I. Kolokolov

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