A5103095092- Advanced NMR Techniques and Applications
- NMR spectroscopy and applications
- Advanced MRI Techniques and Applications
- Quantum and electron transport phenomena
- Surface and Thin Film Phenomena
- Molecular spectroscopy and chirality
- Protist diversity and phylogeny
- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Magnetic properties of thin films
- Electron Spin Resonance Studies
- Radiomics and Machine Learning in Medical Imaging
- Marine and fisheries research
- Advanced Neuroimaging Techniques and Applications
- Electronic and Structural Properties of Oxides
- Advanced Chemical Physics Studies
- Metabolomics and Mass Spectrometry Studies
- MRI in cancer diagnosis
- Marine Bivalve and Aquaculture Studies
- Advanced Materials Characterization Techniques
- Isotope Analysis in Ecology
Xiamen University
2018-2024
Collaborative Innovation Center of Chemistry for Energy Materials
2018
Pennsylvania State University
1996-2001
As a perfect complement to conventional NMR that aims for chemical structure elucidation, Laplace constitutes powerful technique study spin relaxation and diffusion, revealing information on molecular motions interactions. Different from adopting Fourier transform deal with the acquired data, relies specially designed signal processing reconstruction algorithms resembling inverse transform, it generally faces severe challenges in cases where high spectral resolution dimensionality are...
We report on the self-assembly of a superlattice nanodots different elements (Sn,In) $\mathrm{Si}(111)\ensuremath{-}(7\ifmmode\times\else\texttimes\fi{}7)$ template surface, observed with scanning tunneling microscope. The formation is feature and characteristic adsorbates valency. In this paper, we examine evolution these increasing coverage to understand clustering mechanism, their microstructure, electronic properties. results are discussed in light current theories interaction...
Proton nuclear magnetic resonance (1H NMR) spectroscopy presents a powerful detection tool for studying chemical compositions and molecular structures. In practical biological applications, 1H NMR experiments are generally confronted with the challenge of spectral congestions caused by abundant observable components intrinsic limitations narrow frequency distribution range extensive J coupling splitting. Herein, one-dimensional (1D) general method is proposed to individually extract signals...
ABSTRACT Low biological productivity causes ecosystem energy deficiency. Sansha Bay is an important spawning and nursery ground for migratory fish in the East China Sea (ECS). There significant mariculture this area, but stock enhancement programs seasonal fishery closures have failed to recover populations of commercially species, Larimichthys crocea . We want figure out potential reason unsuccessful L. resource recent 30 years. In study, trophic status , food source proportions...
Scanning tunneling microscopy and scanning spectroscopy have been used to study the initial stages of room-temperature deposition In on a Si(111) 7×7 surface. Individual atoms are observed residing atop substrate Si adatoms rest at T1 sites, showing different geometric configurations. An analysis atomic structures in dual-bias images leads us conclude that half-filled pz-like sp3 hybrids covalently bond partially filled hybridized orbitals px,y-like overlap with these nearby metal atoms,...
Longitudinal spin-lattice relaxation (T1) and transverse spin-spin (T2) reveal valuable information for studying molecular dynamics in NMR applications. Accurate measurements from conventional 1D proton spectra are generally subject to challenges of spectral congestion caused by J coupling splittings line broadenings due magnetic field inhomogeneity. Here, we present an method based on real-time pure shift techniques overcome these two achieve accurate T1 T2 times complex samples that...
Pure shift techniques, as one of the rapidly developing frontiers in nuclear magnetic resonance (NMR) fields, can significantly enhance resolution NMR spectrum with a removal splittings induced by scalar couplings. However, periodic artifacts due to residual couplings during acquisition arise on all direct pure spectra, causing severe problems analysis complicated samples. Herein, we construct signal model for data and discuss mechanism artifacts. Then, based constraints low-rank property...
A robust and general single-scan NMR method, SGEN-J, is proposed for real-time recording high-resolution two-dimensional (2D) homonuclear J-resolved spectra under inhomogeneous magnetic fields.This method designed based on the combination of a selective gradient encoding module to encode chemical shifts with spatial positions, J-modulation decoding reveal encoded structural information. Multi-band SGEN-J further implemented effectively enhance spectral sensitivity sustained tolerance field...
Benefitting from the capability of recording scalar (J) couplings and bonding information, 2D J-resolved NMR spectroscopy constitutes an important tool for molecular structure analysis mixture component identification. Unfortunately, conventional experiments generally encounter challenges insufficient spectral resolution strong coupling artifacts. In this study, a general approach is exploited to record absorption-mode artifact-free spectra. This proposal adopts advanced triple-spin-echo...
Homonuclear proton correlation NMR spectroscopy (COSY) offers an essential method for molecular structure elucidation and composition determination, its applicability is further promoted by continuously improved pulse sequence techniques. However, in practical applications, mainly to complex chemical biological samples, existing 2D COSY experiments remain subject the problem of spectral congestion caused abundant observable signals limited shift ranges. Based on signal filtering mechanism...
Motivation: DWI has been used for pulmonary lesion assessment. But clinical single-shot (SS) EPI lung is prone to susceptibility distortions. FOCUS SS, MUSE, and MUSE are improved EPI-based techniques which less sensitive artifacts. However, their performance remains unknown. Goal(s): Performance comparison among the four sequences DWI. Approach: 44 patients were recruited, each was imaged with sequences. Image quality diagnostic of benign malignant discrimination compared. Results: had...
Marine microbial flagellates form an important part of marine ecosystems, and play essential role in maintaining ecosystem functions. However, the underlying biogeographic processes ecological effects that shape flagellate communities (MFCs) on geographical scale (~ 2,000 km) remain unclear, especially how their composition is related to movements water masses. In this study, high-throughput sequencing 18S rRNA genes was conducted survey two size-fractioned groups (0.8–2.0 μm for pico-sized...