A5071027946- Advanced Chemical Physics Studies
- Astrophysics and Star Formation Studies
- Synthesis and characterization of novel inorganic/organometallic compounds
- Molecular Spectroscopy and Structure
- Organoboron and organosilicon chemistry
- Electrical Contact Performance and Analysis
- Mechanical stress and fatigue analysis
- Catalysis and Oxidation Reactions
- Aluminum Alloys Composites Properties
- Muon and positron interactions and applications
- Advanced materials and composites
- Atmospheric chemistry and aerosols
- Molecular Junctions and Nanostructures
- Synthesis and Properties of Aromatic Compounds
- Insect and Pesticide Research
- Antibiotic Resistance in Bacteria
- Fullerene Chemistry and Applications
- Adhesion, Friction, and Surface Interactions
- Brake Systems and Friction Analysis
- Advanced Combustion Engine Technologies
- Semiconductor materials and devices
- Tribology and Wear Analysis
- Powder Metallurgy Techniques and Materials
- Coordination Chemistry and Organometallics
- Antibiotics Pharmacokinetics and Efficacy
University of Hawaiʻi at Mānoa
2020-2025
Henan University of Science and Technology
2013-2025
First Affiliated Hospital of Wannan Medical College
2023-2024
Wannan Medical College
2023
Honolulu University
2021
University of Hawaii System
2020
Lanzhou Institute of Chemical Physics
2019
Chinese Academy of Sciences
2019
Wuhan Research Institute of Materials Protection
2015
Low-temperature indene synthesis could form a molecular building block for non-planar polycyclic aromatics and fullerenes.
Adaptation to selective pressures is crucial for clinically important pathogens establish epidemics, but the underlying evolutionary drivers remain poorly understood. The current epidemic of carbapenem-resistant Klebsiella pneumoniae (CRKP) poses a significant threat public health. In this study we analyzed genome sequences 794 CRKP bloodstream isolates collected in 40 hospitals China between 2014 and 2019. We uncovered subclonal replacement predominant clone ST11, where previously prevalent...
What if an experiment could combine the power of cycloaddition and cross-coupling with in situ formation aromatic molecule a single collision? Crossed molecular beam experiments augmented electronic structure statistical calculations provided compelling evidence on novel radical route involving 1,3-butadiynyl (HCCCC; X2∑+) radicals synthesizing (substituted) arylacetylenes gas phase upon reactions 1,3-butadiene (CH2CHCHCH2; X1Ag) 2-methyl-1,3-butadiene (isoprene; CH2C(CH3)CHCH2; X1A'). This...
To investigate the effect of initial surface roughness on performance at stage current-carrying friction an elastic pair, experiments were conducted using a self-made and wear tester. The results indicate that under experimental conditions, lifespan pair decreases as load decrease. When is Ra 0.2 μm 0.025 N, longest, reaching 320 cycles, with average contact resistance 0.045 Ω standard deviation 0.009 Ω. During normal service period main mechanism furrowing. As adhesion tearing occur,...
The azulene (C10H8) molecule, the simplest polycyclic aromatic hydrocarbon (PAH) carrying a fused seven- and five-membered ring, is regarded as fundamental molecular building block of saddle-shaped carbonaceous nanostructures such curved nanographenes in interstellar medium. However, an understanding underlying gas-phase formation mechanisms this nonbenzenoid 10π-Hückel molecule under low-temperature conditions its infancy. Here, by merging crossed beam experiments with electronic structure...
The crossed molecular beam technique was utilized to explore the reaction of dicarbon C2 (X1Σg+/a3Πu) with 2-methyl-1,3-butadiene (isoprene, CH2C(CH3)CHCH2; X1A′) at a collision energy 28 ± 1 kJ mol–1 using supersonic generated via photolysis (248 nm) helium-seeded tetrachloroethylene (C2Cl4). Experimental data combined previous ab initio calculations provide evidence detection hitherto elusive methyl elimination channels leading acyclic resonantly stabilized hexatetraenyl radicals:...
The copper matrix composites were prepared by spark plasma sintering (SPS). current-carrying friction and wear tests carried out on a self-made HST-100 high-speed tester, the effect of graphite content properties composite material was studied. results show that with an increase in content, average coefficient rate two materials decreased significantly, fluctuation amplitude also significantly reduced, copper-coated 10 wt.% 0.100; when same more than 5.0 wt.%, copper-graphite slightly higher...
Abstract Using special testers, the triboelectric behaviors of several materials were investigated in this paper under conditions high speeds and large currents. The obtained results revealed that tribological current-conducting characteristics have complicated interrelationships. Worsening servicing can obviously deteriorate as well electrical behaviors; sliding currents worsen conductivity properties, while an appropriate contact pressure benefit properties. Further analyses reveal...
The tribological performance of copper-based powder metallurgical material is much influenced by the interfacial bonding between components and matrix. By adding Cu-coated or uncoated graphite particles as a lubricant, two types materials were prepared via spark plasma sintering (SPS). hardness, relative density, thermal conductivity specimens firstly measured. Using an inertial braking test bench temperature measuring instrument, average friction coefficients, instantaneous temperatures...
Intumescent flame retardants (IFR) are used to improve the retardancy of polymers through formation an expanded char layer. However, there is no method that can be detect morphological evolution layer during combustion in real time. Flame ablation surface IFR retardant produces containing monomeric carbon, which makes electrically conductive. The expansion would lead corresponding changes its electrical resistance. Therefore, detecting real-time resistance provide feedback on process....
Cu-xNi-5Sn (wt %) alloys with a different Ni content were prepared by powder metallurgy method. The effect of on the hardness and yield strength was investigated. microstructure, composition, morphology observed X-ray diffraction (XRD), scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS), cold field emission microscope (FESEM), respectively. Results indicate that firstly increase then decrease reach up to maximum when is 12.5 wt %. Furthermore, formation sandwich...
The 1-indenyl (C 9 H 7 • ) radical, a prototype aromatic and resonantly stabilized free radical carrying six- five-membered ring, has emerged as fundamental molecular building block of nonplanar polycyclic hydrocarbons (PAHs) carbonaceous nanostructures in deep space combustion systems. However, the underlying formation mechanisms have remained elusive. Here, we reveal an unconventional low-temperature gas-phase via barrierless ring annulation involving reactions atomic carbon [C( 3 P)] with...
The phenylethynyl radical reaction with benzene leads to the barrierless, gas-phase synthesis of phenanthrene under single collision conditions as a new pathway toward formation polycyclic aromatic hydrocarbons in deep space.
1-Germavinylidene (H2CGe; X1A1), the germanium analogue of vinylidene (H2CC; was prepared via a directed gas-phase synthesis through bimolecular reaction ground state atomic carbon (C; 3P) with germane (GeH4; X1A1) under single-collision conditions. The commences barrierless insertion into Ge–H bond followed by intersystem crossing from triplet to singlet surface and migration hydrogen germylene (H2GeCH2), which predominantly decomposes molecular loss 1-germavinylidene X1A1). Therefore,...
The bimolecular gas-phase reactions of the phenylethynyl radical (C6H5CC, X2A1) with allene (H2CCCH2), allene-d4 (D2CCCD2), and methylacetylene (CH3CCH) were studied under single-collision conditions utilizing crossed molecular beams technique merged electronic structure statistical calculations. was found to add without an entrance barrier C1 carbon reactants, resulting in doublet C11H9 collision complexes lifetimes longer than their rotational periods. These intermediates underwent...
Copper-graphite composites were prepared by spark plasma sintering (SPS) with copper powder and copper-coated graphite powder. The effect of particle size raw material on the current-carrying friction properties copper-graphite was studied. results show that coefficient decreased decrease powder, increased wear rate significantly current carrying different ratios QCr0.5 pairs are good fluctuate little. 150 μm 75 found to be best. surface could divided into mechanical area arc erosion area....
Exploiting the crossed molecular beam technique, we studied reaction of 1-propynyl radical with 2-methylpropene (isobutylene) preferentially leading to trimethylvinylacetylene. This is feasible in cold clouds.
This study aimed to isolate a phage capable of lysing carbapenem-resistant Klebsiella pneumoniae (CRKP) and analyse its biological characteristics whole-genome sequence. The was isolated purified from the sewage. Transmission electron microscopy (TEM) employed observe bacteriophage's morphology. Phenotypic characterization bacteriophages determined. genomic information analysed. Evolutionary relationships were established through comparative genomics, proteomics, phylogenetic analysis....
The bimolecular gas-phase reaction of ground-state atomic carbon (C(3Pj)) with disilane (Si2H6, X1A1g) was explored under single-collision conditions in a crossed molecular beam machine at collision energy 36.6 ± 4.5 kJ mol-1. Two channels were observed: hydrogen elimination plus Si2CH4 (reaction 1) pathway and silane loss channel along the formation SiCH2 2), branching ratios 20 3 80 4%, respectively. Both involved indirect scattering dynamics via long-lived Si2CH6 intermediate(s); latter...
The gas-phase bimolecular reaction of the methylidyne (CH; X2Π) radical with vinylacetylene (H2CCHCCH; X1A') was conducted at a collision energy 20.3 kJ mol-1 under single conditions exploiting crossed molecular beam experimental results merged ab initio electronic structure calculations and dynamics (AIMD) simulations. laboratory data reveal that proceeds barrierlessly via indirect scattering through long-lived C5H5 intermediate(s) ultimately dissociating to C5H4 isomers along atomic...