Journal of magnetic resonance最新文献

Hierarchical maximum likelihood estimation for time-resolved NMR data 时间分辨核磁共振数据的层次最大似然估计。

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-04-01 Epub Date: 2026-02-25 DOI: 10.1016/j.jmr.2026.108044

Lennart H. Bosch , Pernille R. Jensen , Nico Striegler , Thomas Unden , Jochen Scharpf , Usman Qureshi , Philipp Neumann , Martin Gierse , John W. Blanchard , Stephan Knecht , Jochen Scheuer , Ilai Schwartz , Martin B. Plenio

{"title":"Hierarchical maximum likelihood estimation for time-resolved NMR data","authors":"Lennart H. Bosch , Pernille R. Jensen , Nico Striegler , Thomas Unden , Jochen Scharpf , Usman Qureshi , Philipp Neumann , Martin Gierse , John W. Blanchard , Stephan Knecht , Jochen Scheuer , Ilai Schwartz , Martin B. Plenio","doi":"10.1016/j.jmr.2026.108044","DOIUrl":"10.1016/j.jmr.2026.108044","url":null,"abstract":"<div><div>Metabolic monitoring and reaction rate estimation using hyperpolarized NMR technology requires accurate quantitative analysis of multidimensional data scenarios. Currently, this analysis is often performed in a two-stage procedure, which is prone to errors in uncertainty propagation and estimation. We propose an approach derived from a Bayesian hierarchical model that intrinsically propagates uncertainties and operates on the full data to maximize the precision at minimal uncertainty. In an analytic treatment, we reduce the estimation procedure to a least-squares optimization problem which can be understood as an extension of the Variable Projection (VarPro) approach for data scenarios with two predictors. We investigate the method’s efficacy in two experiments with hyperpolarized metabolites recorded with conventional high-field NMR devices and a micronscale NMR setup using Nitrogen-Vacancy centers in diamond for detection, respectively. In both examples, the new approach improves estimates compared to Fourier methods and proves operational advantages over a two-stage procedure employing VarPro. While the approach presented is motivated by NMR analysis, it is straightforwardly applicable to further estimation scenarios with similar data structure, such as time-resolved photospectroscopy.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"385 ","pages":"Article 108044"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147358017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility of oxygen-enhanced MRI at 7T for assessing lung functional alterations in rats 7T时氧增强MRI评估大鼠肺功能改变的可行性。

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-04-01 Epub Date: 2026-02-11 DOI: 10.1016/j.jmr.2026.108031

Dmitrii B. Lebedev , Mikhail V. Gulyaev , Yury A. Pirogov

{"title":"Feasibility of oxygen-enhanced MRI at 7T for assessing lung functional alterations in rats","authors":"Dmitrii B. Lebedev , Mikhail V. Gulyaev , Yury A. Pirogov","doi":"10.1016/j.jmr.2026.108031","DOIUrl":"10.1016/j.jmr.2026.108031","url":null,"abstract":"<div><div>Oxygen-enhanced (OE) magnetic resonance imaging (MRI) provides a non-invasive approach for assessing lung function. Its application in preclinical models is challenging due to rapid respiratory motion, the intrinsically short T<sub>2</sub>* of lung tissue and susceptibility to magnetic field inhomogeneity. These limitations can be largely overcome using standard radial pulse sequences with ultra-short echo, combined with robust T<sub>1</sub>-mapping techniques that include <em>B</em><sub>1</sub><sup>+</sup>-field correction to ensure accurate quantification of regional oxygenation. In this study, we applied the Double Angle Method (DAM) to correct <em>B</em><sub>1</sub><sup>+</sup>-field inhomogeneity for variable flip angle (VFA) T<sub>1</sub>-mapping. Lung images were acquired using a 3D ultrashort echo time (UTE) sequence, enabling assessment of regional T<sub>1</sub> values during ambient air and 95% O<sub>2</sub> inhalation. Both healthy control rats and animals with acute lung inflammation induced by intratracheal lipopolysaccharide (LPS) were studied. Baseline T<sub>1</sub> values in the lung parenchyma were higher in LPS-treated animals compared to controls, with visually identified inflamed regions showing the greatest elevation. Upon inhalation of 95% O<sub>2</sub>, T<sub>1</sub> decreased in all groups, but the relative reduction was smaller in LPS-treated lungs than in controls and minimal in inflamed regions, indicating impaired regional oxygen responsiveness. These results demonstrate the feasibility of OE MRI for detecting localized functional impairments in the lungs caused by inflammation.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"385 ","pages":"Article 108031"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146215157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of shale using T2–T2∗ relaxation correlation measurements 利用T2-T2 *松弛相关测量表征页岩。

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-04-01 Epub Date: 2026-02-18 DOI: 10.1016/j.jmr.2026.108033

Dominic O. Couillard, Mohammad Sadegh Zamiri, Bruce J. Balcom, Benedict Newling

{"title":"Characterization of shale using T2–T2∗ relaxation correlation measurements","authors":"Dominic O. Couillard, Mohammad Sadegh Zamiri, Bruce J. Balcom, Benedict Newling","doi":"10.1016/j.jmr.2026.108033","DOIUrl":"10.1016/j.jmr.2026.108033","url":null,"abstract":"<div><div>Magnetic resonance 2D relaxation correlation measurements have been shown to be an incredibly effective way of characterizing complex porous media. Such porous media systems are important for various industries, including the energy industry. Organic shale is a prevalent example in the energy industry. In this paper, we demonstrate the characterization of a shale sample using our new <span><math><msub><mrow><mi>T</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>-<span><math><msubsup><mrow><mi>T</mi></mrow><mrow><mn>2</mn></mrow><mrow><mo>∗</mo></mrow></msubsup></math></span> correlation measurement. We show that the measurement is capable of distinguishing between different hydrogen environments in shale, demonstrating analytical potential for composite porous media. We also show that <span><math><msubsup><mrow><mi>T</mi></mrow><mrow><mn>2</mn></mrow><mrow><mo>∗</mo></mrow></msubsup></math></span> cannot always be used as an analogue to <span><math><msub><mrow><mi>T</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> in heterogeneous media, as shown by peak migrations away from contours of constant <span><math><msub><mrow><mi>T</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>/<span><math><msubsup><mrow><mi>T</mi></mrow><mrow><mn>2</mn></mrow><mrow><mo>∗</mo></mrow></msubsup></math></span>, caused by changing the magnetic field strength.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"385 ","pages":"Article 108033"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147313712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unmatched delay line NMR probes for magnetic resonance 无与伦比的延迟线核磁共振探头的磁共振。

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-04-01 Epub Date: 2026-02-19 DOI: 10.1016/j.jmr.2026.108032

Nathan Evetts

{"title":"Unmatched delay line NMR probes for magnetic resonance","authors":"Nathan Evetts","doi":"10.1016/j.jmr.2026.108032","DOIUrl":"10.1016/j.jmr.2026.108032","url":null,"abstract":"<div><div>In magnetic resonance experiments the delay line probe is useful for its broadband impedance match and short ring down times. However, it is usually difficult to construct, and less sensitive than resonant probes. Additionally, the delay line has been widely misused in a manner that further degrades its performance due to an interference effect. We report that significant improvements in signal-to-noise ratio (<span><math><mo>∼</mo></math></span>2x) are available when the probe is used with an unmatched termination. This improvement is experimentally demonstrated using both an <span><math><msup><mrow></mrow><mrow><mn>1</mn></mrow></msup></math></span>H NMR signal in a variable electromagnet and with typical “sniffer” coil measurements that characterize <span><math><msub><mrow><mi>B</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>. A quantitative comparison is made with both resonant and bare-coil (“no-tune-no-match”) probes. A novel “echo” type signal is observed in the delay line free induction decay under certain conditions. To alleviate the difficulty of construction we describe an approach using printed circuit board fabrication methods. A PCB delay line probe operating from 4–400 MHz is realized for a magnetometry application. The probe is observed to be robust in cryogenic environments. Finally, we show how to better characterize and optimize a delay line style probe with ordinary vector network analyzer measurements. These practical details are missing from the literature, and relevant to several branches of physics in which broadband spin control is an important technique.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"385 ","pages":"Article 108032"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146260511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

17O quadrupolar chemical exchange saturation transfer (Q-CEST) NMR for investigations of molecular dynamics in solids 17O四极性化学交换饱和转移（Q-CEST）核磁共振用于固体分子动力学的研究。

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-04-01 Epub Date: 2026-02-26 DOI: 10.1016/j.jmr.2026.108045

Liliya Vugmeyster , Karen Basaves , Riqiang Fu , Sean T. Holmes , Dmitry Ostrovsky

{"title":"17O quadrupolar chemical exchange saturation transfer (Q-CEST) NMR for investigations of molecular dynamics in solids","authors":"Liliya Vugmeyster , Karen Basaves , Riqiang Fu , Sean T. Holmes , Dmitry Ostrovsky","doi":"10.1016/j.jmr.2026.108045","DOIUrl":"10.1016/j.jmr.2026.108045","url":null,"abstract":"<div><div>We introduce quadrupolar chemical exchange saturation transfer (Q-CEST) for half-integer quadrupolar nuclei such as oxygen-17 as a complementary NMR tool for studies of molecular dynamics in solids. Experiments on the model compounds NaNO<sub>3</sub> and hydration water in fibrils formed by pyro-glutamate E3 Amyloid-β protein are combined with simulations and theoretical approaches to obtain parameters of molecular motions. We determine the rate constants for 3-site jumps of oxygen atoms in NaNO<sub>3</sub> and rate constants and populations of tetrahedral jumps of hydration water in the proximity to protein surface below the bulk freezing point. The detection is focused on the central transition (CT). However, during the saturation the transmitter is swept across a wide range of frequencies reaching the first satellite transitions. A detailed analysis is provided for CT Q-CEST profiles in the presence of molecular dynamics covering two dynamical transitions occurring approximately in the microsecond and nanosecond time scale ranges and paying special attention to correct inclusion of the dynamics averaging of the second order quadrupolar interaction.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"385 ","pages":"Article 108045"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147367648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectral-band-selective multidimensional nuclear magnetic resonance spectroscopy using broadband dipolar recoupling schemes 使用宽带偶极重耦合方案的光谱带选择性多维核磁共振波谱学。

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-03-01 Epub Date: 2026-02-04 DOI: 10.1016/j.jmr.2026.108022

Edward P. Saliba , Sarah A. Overall , Alexander B. Barnes

{"title":"Spectral-band-selective multidimensional nuclear magnetic resonance spectroscopy using broadband dipolar recoupling schemes","authors":"Edward P. Saliba , Sarah A. Overall , Alexander B. Barnes","doi":"10.1016/j.jmr.2026.108022","DOIUrl":"10.1016/j.jmr.2026.108022","url":null,"abstract":"<div><div>Nuclear magnetic resonance (NMR) spectroscopy is an important analytical tool for probing molecular structures and interactions. For high complexity samples, multidimensional spectroscopy is essential for improving the resolution of NMR data. However, multidimensional experiments cost significant experimental time which scales with the number of indirect points. This is particularly challenging when dealing with highly dispersed nuclei, such as <sup>13</sup>C, due to the large chemical shift range, with large regions that are spectrally empty. Herein, we describe a method for limiting the spectral width of dipolar based multidimensional NMR experiments in the indirect dimension in a manner that can be easily integrated into relaxation and distance measuring schemes. We demonstrate the acquisition of narrow strips of broadband homonuclear recoupling <sup>13</sup>C-<sup>13</sup>C correlation spectra on a range of biomolecular and cellular samples, allowing targeted acquisition of high-resolution spectra of the region of interest with a significant reduction in the acquisition time. We also demonstrate the use of the spectral-band-selective method for allowing fast acquisition of RFDR build-up experiments. The band-selective method is easy to implement in any dipolar-based multidimensional pulse sequence by an addition of one pulse per band-selected indirect dimension and a slight modification of the phase cycle.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"384 ","pages":"Article 108022"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146145366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated frequency tuning for broadband NMR spectroscopy: A LabVIEW-based solution 宽带核磁共振光谱的自动频率调谐：基于labview的解决方案

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-03-01 Epub Date: 2026-02-03 DOI: 10.1016/j.jmr.2026.108020

Yanan Li , Hadrien Mayaffre , Florian Bärtl , Steffen Krämer , Mladen Horvatić

{"title":"Automated frequency tuning for broadband NMR spectroscopy: A LabVIEW-based solution","authors":"Yanan Li , Hadrien Mayaffre , Florian Bärtl , Steffen Krämer , Mladen Horvatić","doi":"10.1016/j.jmr.2026.108020","DOIUrl":"10.1016/j.jmr.2026.108020","url":null,"abstract":"<div><div>This work introduces an automated frequency-tuning system for Nuclear Magnetic Resonance (NMR) spectroscopy. Developed using LabVIEW software, the system is designed for the top-tuning configurations of NMR probes commonly used in solid-state physics for broad-frequency-sweep spectra at very low temperatures and/or high magnetic fields. The system integrates a stepper motor, driver, phase shifter, and network analyzer to enable rapid, precise, and efficient probe tuning. Traditional manual tuning for broadband NMR is labor-intensive and time-consuming, often hindering timely data acquisition. Our automated solution significantly reduces tuning time and minimizes user intervention, thereby enhancing the efficiency and accuracy of NMR measurements. The system’s effectiveness is demonstrated with experimental <sup>63</sup>Cu and <sup>65</sup>Cu NMR results from an SrCu<sub>2</sub>(BO<sub>3</sub>)<sub>2</sub> sample in a high magnetic field. This automation is particularly valuable for streamlining research in ultra-high magnetic fields, which are exceptionally expensive to produce.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"384 ","pages":"Article 108020"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heisenberg spin exchange and relaxation dynamics in EPR oximetry: A photoinduced transition from non-adiabatic rapid-sweeps to the rapid-scan regime EPR血氧测定中的海森堡自旋交换和弛豫动力学：从非绝热快速扫描到快速扫描的光诱导转变

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-03-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jmr.2026.108021

Florian Johannsen, Malte Drescher

引用次数: 0

Solvent PRE and effective near surface electrostatics: theory, methods, and biological insights 溶剂PRE和有效的近表面静电：理论、方法和生物学见解。

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-03-01 Epub Date: 2025-12-04 DOI: 10.1016/j.jmr.2025.108007

Sydney Griggs, Yusuke Okuno

{"title":"Solvent PRE and effective near surface electrostatics: theory, methods, and biological insights","authors":"Sydney Griggs, Yusuke Okuno","doi":"10.1016/j.jmr.2025.108007","DOIUrl":"10.1016/j.jmr.2025.108007","url":null,"abstract":"<div><div>Electrostatic interactions are central to biomolecular structure, dynamics, and function, yet experimentally probing local electrostatic potentials with residue-level resolution remains challenging. Solvent paramagnetic relaxation enhancement (sPRE) offers a powerful nuclear magnetic resonance (NMR) approach to directly quantify near-surface electrostatic environments without requiring structural information. In this review, we outline the theoretical framework underlying sPRE, emphasizing recent advances in spectral density analysis, spatial decomposition, and the influence of intermolecular potentials. We discuss the effective near-surface electrostatic potential (ENS), a derived quantity that captures local electrostatic fields by comparing transverse relaxation rates induced by paramagnetic cosolutes of differing charge. Applications to proteins, nucleic acids, and intrinsically disordered systems highlight the ability of sPRE and ENS to reveal electrostatic modulation in complex biological contexts, including phase separation, ion atmosphere structure, and protein–nucleic acid interactions. We also examine current limitations and provide a theoretical basis for interpreting ENS, offering perspectives for future methodological developments in electrostatics mapping by NMR.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"384 ","pages":"Article 108007"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145800915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A high-performance ceramic volume coil for preclinical MRI 一种用于临床前MRI的高性能陶瓷体积线圈

IF 1.9 3区化学

Journal of magnetic resonance Pub Date : 2026-02-01 Epub Date: 2026-01-23 DOI: 10.1016/j.jmr.2026.108019

Conner S. Ubert , Sergey V. Petryakov , Maciej M. Kmiec , Ryan C. O'Connell , Victor B. Kassey , Periannan Kuppusamy

{"title":"A high-performance ceramic volume coil for preclinical MRI","authors":"Conner S. Ubert , Sergey V. Petryakov , Maciej M. Kmiec , Ryan C. O'Connell , Victor B. Kassey , Periannan Kuppusamy","doi":"10.1016/j.jmr.2026.108019","DOIUrl":"10.1016/j.jmr.2026.108019","url":null,"abstract":"<div><div>A novel volume radio-frequency (RF) coil built around a cylindrical ceramic dielectric (relative permittivity ε<sub>r</sub> = 270) was developed for high-field small-animal magnetic resonance imaging (MRI). Finite element simulations were used to optimize the resonator geometry, resulting in an inner diameter of 30 mm, an outer diameter of 47 mm and a length of 43 mm, which is tuned to approximately 400 MHz resonance frequency. The coil is tuned and matched solely by two inductively coupled loops, eliminating the need for lumped-element tuning and matching capacitors. In the loaded state the coil exhibits a quality factor of 105 and very uniform transmit fields, with a B<sub>1</sub> homogeneity of 98.2% in the unloaded condition. Phantom experiments show 97% signal uniformity across 0.7 mm slices and a signal-to-noise ratio (SNR) ranging from 55 to 220 along the coil axis. B<sub>1</sub> mapping confirms accurate excitation (mean actual-to-nominal flip-angle ratio = 1.05) with a coefficient of variation of 1.9%. High-resolution mouse images demonstrate that the ceramic resonator provides excellent anatomical detail, confirming its utility for preclinical MRI. This dielectric-resonator design delivers B<sub>1</sub> homogeneity comparable to or better than conventional coils while simplifying hardware, improving tuning stability and reducing RF losses, establishing it as a cost-effective and robust solution for quantitative high-field preclinical MRI.</div></div>","PeriodicalId":16267,"journal":{"name":"Journal of magnetic resonance","volume":"383 ","pages":"Article 108019"},"PeriodicalIF":1.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146022783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0