Continuous wave electron paramagnetic resonance of nitroxide biradicals in fluid solution [0.03%]
流动溶液中二自由基的连续波电子顺磁共振研究
Sandra S Eaton,Lukas B Woodcock,Gareth R Eaton
Sandra S Eaton
Nitroxide biradicals have been prepared with electron-electron spin-spin exchange interaction, J, ranging from weak to very strong. EPR spectra of these biradicals in fluid solution depend on the ratio of J to the nitrogen hyperfine couplin...
Covariance nuclear magnetic resonance methods for obtaining protein assignments and novel correlations [0.03%]
用于获取蛋白质指征和新颖关联的协方差核磁共振方法
Aswani K Kancherla,Dominique P Frueh
Aswani K Kancherla
Protein NMR resonance assignment can be a tedious and error prone process, and it is often a limiting factor in biomolecular NMR studies. Challenges are exacerbated in larger proteins, disordered proteins, and often alpha-helical proteins, ...
Jae-Seung Lee,Ravinder R Regatte,Alexej Jerschow
Jae-Seung Lee
The extension of the Bloch equations for acid-base reactions in an aqueous solution is revisited. The acid-base reactions are second-order, and several reactions catalyzed by distinct catalysts may happen simultaneously. By constructing pse...
Manifestations of classical physics in the quantum evolution of correlated spin states in pulsed NMR experiments [0.03%]
脉冲核磁共振实验中相关自旋体系量子演化的经典物理表现
Martin Ligare
Martin Ligare
Multiple-pulse NMR experiments are a powerful tool for the investigation of molecules with coupled nuclear spins. The product operator formalism provides a way to understand the quantum evolution of an ensemble of weakly coupled spins in su...
Effects of radiation damping for biomolecular NMR experiments in solution: a hemisphere concept for water suppression [0.03%]
溶液中生物分子NMR实验中的辐射阻尼效应：用于水峰抑制的半球概念
Rieko Ishima
Rieko Ishima
Abundant solvent nuclear spins, such as water protons in aqueous solution, cause radiation damping in NMR experiments. It is important to know how the effect of radiation damping appears in high-resolution protein NMR because macromolecular...
Spatial Mapping of Translational Diffusion Coefficients Using Diffusion Tensor Imaging: A Mathematical Description [0.03%]
基于扩散张量成像的空间扩散系数映射的数学描述方法
Anil N Shetty,Sharon Chiang,Mirjana Maletic-Savatic et al.
Anil N Shetty et al.
In this article, we discuss the theoretical background for diffusion weighted imaging and diffusion tensor imaging. Molecular diffusion is a random process involving thermal Brownian motion. In biological tissues, the underlying microstruct...
Characterizing magnetic resonance signal decay due to Gaussian diffusion: the path integral approach and a convenient computational method [0.03%]
高斯扩散的磁共振信号衰减特征：路径积分方法及一种方便的计算方法
Evren Özarslan,Carl-Fredrik Westin,Thomas H Mareci
Evren Özarslan
The influence of Gaussian diffusion on the magnetic resonance signal is determined by the apparent diffusion coefficient (ADC) and tensor (ADT) of the diffusing fluid as well as the gradient waveform applied to sensitize the signal to diffu...
Cheng Guan Koay,Evren Özarslan
Cheng Guan Koay
A thorough review of the q-space technique is presented starting from a discussion of Fick's laws. The work presented here is primarily conceptual, theoretical and hopefully pedagogical. We offered the notion of molecular concentration to u...
Edge Sharpness Assessment by Parametric Modeling: Application to Magnetic Resonance Imaging [0.03%]
基于参数模型的边缘锐度评价及其在磁共振成像中的应用
R Ahmad,Y Ding,O P Simonetti
R Ahmad
In biomedical imaging, edge sharpness is an important yet often overlooked image quality metric. In this work, a semi-automatic method to quantify edge sharpness in the presence of significant noise is presented with application to magnetic...