A5100354009- NMR spectroscopy and applications
- Nuclear Physics and Applications
- Advanced Polymer Synthesis and Characterization
- Dendrimers and Hyperbranched Polymers
- Polymer Surface Interaction Studies
- Advanced NMR Techniques and Applications
- Advanced MRI Techniques and Applications
- Radioactivity and Radon Measurements
- Mass Spectrometry Techniques and Applications
- RNA Interference and Gene Delivery
- Surfactants and Colloidal Systems
- Material Dynamics and Properties
- Process Optimization and Integration
- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Conducting polymers and applications
- Particle physics theoretical and experimental studies
- Phase Equilibria and Thermodynamics
- Food Quality and Safety Studies
- Radiation Detection and Scintillator Technologies
- Optical Polarization and Ellipsometry
- Fault Detection and Control Systems
- High-pressure geophysics and materials
- Melamine detection and toxicity
- Electrostatics and Colloid Interactions
Guangzhou Institute of Geography
2025
Guangdong Academy of Sciences
2025
Qingdao University of Science and Technology
2021-2024
State Key Laboratory of Biogenic Fiber Manufacturing Technology
2022
China Textile Academy
2022
Shanghai Institute of Technology
2022
Wadsworth Center
2017-2021
New York State Department of Health
2017-2021
North Carolina State University
2021
Indiana University Bloomington
2011-2020
Many potential health benefits of raspberry (Rubus idaeus L.) leaves were attributed to polyphenolic compounds, especially flavonoids. In this study, the methanol extract R. showed significant protein tyrosine phosphatase-1B (PTP1B) inhibitory activity with IC50 value 3.41 ± 0.01 µg mL−1. Meanwhile, a rapid and reliable method, employed high-performance liquid chromatography coupled electrospray ionization quadrupole time-of-flight tandem mass spectrometry, was established for structure...
A combined small-angle neutron scattering (SANS) and X-ray (SAXS) study was conducted to investigate the structural characteristics of aqueous (D2O) solution generation 7 8 (G7 & G8) polyamidoamine (PAMAM) dendrimer as a function molecular protonation. consequent change in intramolecular conformation clearly quantified by detailed data analysis separating intermolecular correlations from contribution. Our results unambiguously reveal both an increase size continuous variation density profile...
Zwitterionic ring-opening polymerization (ZROP) of N-butyl N-carboxyanhydrides (Bu-NCAs) has been investigated using 1,8-diazabicycloundec-7-ene (DBU), a bicyclic amidine initiator. It was found that poly(N-butylglycine)s (PNBGs) with molecular weight (Mn) in the 3.5–32.4 kg mol–1 range and polydispersity index (PDI) 1.02–1.12 can be readily obtained by systematically varying initial monomer to initiator feed ratio. The exhibits characteristics controlled polymerization, as evidenced linear...
Mangroves play a crucial role in supporting the biodiversity of coastal wetlands, acting as vital link between terrestrial and marine ecosystems. In mainland China, Sonneratia apetala, an invasive mangrove species, has recently become dominant these environments. While it contributes to stability ecosystems is widely used restoration efforts, its rapid growth poses significant threat survival native species. However, spatiotemporal dynamics landscape impacts apetala remain underexplored...
Propagation of polarized light in skeletal muscle is significantly affected by anisotropic structures. To completely characterize polarization properties, we acquired the whole Mueller matrix images diffuse reflectance. A polar decomposition algorithm was applied to extract individual diattenuation, retardance, and depolarization from measured matrix. The decomposed properties show distinctly different patterns those obtained isotropic scattering media. Stretching prerigor sample induced...
Dendrimers are highly branched, open, covalent assemblies of branch cells (monomers) radially attached to a core in successive layers or generations. Major types dendrimers include polyamidoamine, polypropylenimine, multiple antigen peptide, chiral, and Fréchet-type dendrimers. Their structure dynamics can be explored by various techniques, such as scattering, spectrometry, microscopy techniques. Specifically, the scattering techniques small-angle neutron (SANS), quasi-elastic (QENS), X-ray...
The single-particle small-angle scattering properties of five Platonic solids, including the tetrahedron, hexahedron, octahedron, dodecahedron and icosahedron, are systematically investigated. For each given geometry, Debye spatial autocorrelation function, pair distance distribution function intraparticle structure factor (form factor) calculated compared with corresponding a spherical reference system. From theoretical models, empirical relationship between dodecahedral icosahedral...
We acquired polarization-sensitive reflectance images in freshly excised skeletal muscle samples. The obtained raw varied depending on the incident and detection polarization states. Stokes vectors were measured for light of four different states, whole Mueller matrix also calculated. found that muscles exhibited features from those a typical polystyrene sphere solution. back-reflected maintained higher degree along axis perpendicular to fiber orientation. Our analysis indicates unique...
A combined quasi-elastic neutron scattering (QENS) and high-resolution solution NMR spectroscopy study was conducted to investigate the internal dynamics of aqueous (D2O) G5 PAMAM dendrimer solutions as a function molecular protonation at room temperature. Localized motion segments clearly exhibited in QENS data analysis while global, center-of-mass translational diffusion measured by NMR. Our results unambiguously demonstrate an increased rapidity local scale (∼ 3 Å) upon increasing...
An accurate determination of the structure characteristics protonated generation 5 polyamidoamine dendrimers in aqueous solution has been conducted by analyzing small angle neutron scattering databased on a statistical mechanics model. In our investigation, primary focus is to elucidate effect counterion valence association and its impact intramolecular density profile within dendrimer. range study for molecular protonation, strong dependence structural properties charged revealed. Our...
Pyrethroid residues in traditional Chinese medicines have been a serious threat to the health and treatment of patients. However, because matrix complexity medicine, detection pyrethroid remains challenge. Therefore, we developed QuEChERS method coupled with high-performance liquid chromatography ultraviolet (HPLC-UV) for determination pesticides three kinds medicine oral preparations, investigated optimized extraction conditions. The effect was estimated organic solvent actual samples by...
In this work, we extend the classical real-valued framework to deal with complex-valued dissipative dynamical systems. With our new and using generalized complex Banach limits, construct invariant measures for continuous semigroups possessing global attractors. particular, any given limit initial data $u_{0}$, a unique measure $\mu$ on metric space which is acted by semigroup $\{S(t)\}_{t\geq 0}$ attractor $\mathcal{A}$. Moreover, it shown that support of not only contained in $\mathcal{A}$...
Currently, commercial downhole nuclear magnetic resonance (NMR) tools can measure depth (along with borehole axis) and radial (perpendicular profile information simultaneously. However, in many cases, the lack of due to strong heterogeneity, partial invasion drilling mud around or collapse will have a serious impact on applications. In order ensure validity each measurement, acquisition azimuthal is as important information. this paper, we described performance response simulation an...
Associations of coffee and tea consumption with lung cancer risk have been inconsistent, most cases investigated were smokers. Included in this study over 1.1 million participants from 17 prospective cohorts. Cox regression analyses conducted to estimate hazard ratios (HRs) 95% confidence intervals (CIs). Potential effect modifications by sex, smoking, race, subtype type assessed. After a median 8.6 years follow-up, 20 280 incident identified. Compared noncoffee nontea consumption, HRs (95%...
Polyamidoamine (PAMAM) dendrimers and their charged state in deuterium oxide have been investigated with proton pulsed field gradient diffusion nuclear magnetic resonance (PFG-NMR) small-angle neutron scattering (SANS) techniques. NMR measurements suggest that significant variation of the hydrodynamic radius, calculated by Stokes-Einstein relation appropriate surface conditions, is observed upon increasing molecular protonation. However, a comparative SANS experiment indicates little...
An experimental scheme using contrast variation small angle neutron scattering technique is developed to investigate the structural characteristics of amine-terminated poly(amidoamine) dendrimers solutions. Using this methodology, we present dependence both intra-dendrimer water and polymer distribution on molecular protonation, which can be precisely adjusted by tuning pH solution. Assuming spherical symmetry spatial arrangement constituent components dendrimer, that atomic ratio...
Atomistic molecular dynamics (MD) simulations were carried out to investigate the local of polyelectrolyte dendrimers dissolved in deuterium oxide (D2O) and its dependence on charge. Enhanced segmental upon increase charge is observed, consistent with quasielastic neutron scattering (QENS) measurements. A strong coupling between intradendrimer hydration level also revealed. Compelling evidence shows these findings originate from electrostatic interaction hydrocarbon components a dendrimer...