A5100737078- Advanced Chemical Physics Studies
- Near-Field Optical Microscopy
- Molecular Spectroscopy and Structure
- Plasmonic and Surface Plasmon Research
- Astrophysics and Star Formation Studies
- Orbital Angular Momentum in Optics
- Photonic and Optical Devices
- Atmospheric Ozone and Climate
- Mass Spectrometry Techniques and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor Lasers and Optical Devices
- Planetary Science and Exploration
- Quantum, superfluid, helium dynamics
- Advanced Measurement and Metrology Techniques
- Geological and Geochemical Analysis
- Optical Coatings and Gratings
- Atmospheric chemistry and aerosols
- earthquake and tectonic studies
- Astro and Planetary Science
- Gold and Silver Nanoparticles Synthesis and Applications
- Ion-surface interactions and analysis
- Atomic and Molecular Physics
- Surface Roughness and Optical Measurements
- Semiconductor Quantum Structures and Devices
- Chemical Thermodynamics and Molecular Structure
Beijing Aerospace Flight Control Center
2021-2025
Renmin University of China
2025
University of Hawaiʻi at Mānoa
2022-2024
Xi'an Technological University
2018-2024
University of Hawaii System
2023-2024
Honolulu University
2024
Center for Free-Electron Laser Science
2020-2023
Deutsches Elektronen-Synchrotron DESY
2020-2023
Universität Hamburg
2020-2023
Chongqing Three Gorges University
2023
In situ x-ray-scattering studies of the Au(111) electrode surface have been carried out in NaF, NaCl, LiCl, CsCl, KCl, and NaBr solutions using grazing-incident-angle diffraction reflectivity techniques. The top layer gold atoms undergoes a reversible phase transition between (1\ifmmode\times\else\texttimes\fi{}1) bulk termination (p\ifmmode\times\else\texttimes\fi{} \ensuremath{\surd}3 ) uniaxial discommensuration (striped) on changing potential. Below critical potential, all solutions,...
Abstract Conventional microbial cell cultivation techniques are typically labor intensive, low throughput, and poorlyparallelized, rendering them inefficient. The development of automated, modular micro‐cultivation systems, particularly those employing droplet microfluidics, have gained attention for their high‐throughput, highly paralellized efficient capabilities. Here, we report the a microdroplet culture system (MMC), which is an integrated platform high‐throughput adaptive evolution...
Mass spectrometry imaging (MSI) is a crucial label-free method to distinguish the localization patterns in single cells. MALDI-TOF MS and ToF-SIMS are now bearing responsibility. However, limited micron spatial resolution suffers from severe molecular fragmentation. Here, we proposed new MSI methodology of vacuum ultraviolet laser desorption/ionization (VUVDI) with high resolution, achieving higher ion yields less fragmentation compared at submicron level. The fluorescence image mass...
Objective: This study aimed to explore the impact of social anxiety on depression among high school students and examine parallel mediating roles comparison support. Methods: A total 806 rural were surveyed using Short Mood Feelings Questionnaire, Social Phobia Inventory, Chinese version Comparison Orientation Scale, Multidimensional Scale Perceived Support. Results: significantly positively correlated with depression, while support exhibited a significant negative correlation depression....
The Kuiper Belt object (KBO) Arrokoth, the farthest in Solar System ever visited by a spacecraft, possesses distinctive reddish surface and is characterized pronounced spectroscopic features associated with methanol. However, fundamental processes which methanol ices are converted into reddish, complex organic molecules on Arrokoth’s have remained elusive. Here, we combine laboratory simulation experiments characterization of exposed to proxies galactic cosmic rays (GCRs). Our findings...
Oxirenes—highly strained 4π Hückel antiaromatic organics—have been recognized as key reactive intermediates in the Wolff rearrangement and interstellar environments. Predicting short lifetimes tendency toward ring opening, oxirenes are one of most mysterious classes organic transients, with isolation oxirene ( c -C 2 H O) having remained elusive. Here, we report on preparation low-temperature methanol-acetaldehyde matrices upon energetic processing through isomerization ketene (H CCO)...
Reactions in interstellar ices are shown to be capable of producing key prebiotic molecules without energetic radiation that necessary for the origins life. When present ices, carbamic acid (H2NCOOH) can serve as a condensed-phase source molecular building blocks more complex proteinogenic amino acids. Here, Fourier transform infrared spectroscopy during heating analogue composed carbon dioxide and ammonia identifies lower limit thermal synthesis 62 ± 3 K 39 4 its salt ammonium carbamate...
Glyceric acid [HOCH
An optical trapping system with a single-mode lensed fiber probe inserted at an angle is built; this simpler and more flexible than conventional tweezers. Two lasers, 632.8- 1550-nm wavelengths, are employed to trap manipulate yeast cells polystyrene microspheres. Nine manipulated form letter "T." Finally, the manipulation performed various inclination angles, particle materials, laser powers analyzed experimentally.
The commonly used stable factor methods for the inverse [Formula: see text]-filter achieve good performance in seismic data processing; however, constant gain-limit assumption these is not associated with effective frequency band of and cannot obtain desirable results high resolution signal-to-noise ratio (S/N). Our extended method extends by introducing two parameters or self-adaptive gain limit to high-resolution high-S/N result. can be implemented time-frequency domain; latter...
With the recent development of metasurface, generating an optical vortex in far or near fields is realized various ways. However, to generate vortices both and simultaneously still a challenge, although it has great potential future compact versatile photonic system. Here, bi-channel generator proposed demonstrated within single where surface plasmon far-field can be generated under circularly polarized light. The ability with arbitrary topological charges experimentally demonstrated, which...
Diels-Alder cycloadditions are efficient routes for the synthesis of cyclic organic compounds. There has been a long-standing discussion whether these reactions proceed via stepwise or concerted mechanisms. Here, we adopt an experimental approach to explore mechanism model polar cycloaddition 2,3-dibromo-1,3-butadiene with propene ions by probing its conformational specificities in entrance channel under single-collision conditions gas phase. Combining conformationally controlled molecular...
Glycinal (HCOCH2 NH2 ) and acetamide (CH3 CONH2 are simple molecular building blocks of biomolecules in prebiotic chemistry, though their origin on early Earth formation interstellar media remain a mystery. These molecules formed with tautomers low temperature model ices upon interaction simulated galactic cosmic rays. accessed via barrierless radical-radical reactions vinoxy (⋅CH2 CHO) acetyl (⋅C(O)CH3 ), then undergo keto-enol tautomerization. Exploiting tunable photoionization reflectron...
The Chang'e-5 mission of China is planned to be launched in 2019 the landing area near Mons Rümker located Oceanus Procellarum. Aiming generate a high-resolution and high-quality digital orthophoto map (DOM) for supporting various scientific analyses, this study developed systematic effective method large-area seamless DOM production. mapping results using over 700 Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle (NAC) images are presented. resultant has resolution 1.5 m, covers large...
The southern Hunan Province in southeastern China is the site of extensive Mesozoic magmatism and formation associated polymetallic deposits, among which, studies for Cu–Pb–Zn mineralization are relatively rare compared with W–Sn deposits. In this study, Baoshan skarn Cu–Mo–Pb–Zn deposit investigated as a typical example sulfide ores hosted distal carbonate. By presenting situ laser ablation–inductively coupled plasma–mass spectrometry trace-element compositions ubiquitous pyrite, well...
Since the observation of first sulfur-containing molecule, carbon monosulfide (CS), in interstellar medium (ISM) half a century ago, sulfur-bearing species have attracted great attention from astrochemistry, astrobiology, and planetary geology communities. Nevertheless, it is still not clear which forms most sulfur resides molecular clouds, an unsolved problem referred to as "sulfur depletion". Reported herein formation thioformic acid (HCOSH)─the simplest thioacid─in ice analogues...
Recent advances in experimental methodology enabled studies of the quantum-state- and conformational dependence reaction 2,3-dibromobutadiene with laser-cooled calcium ions gas phase.
Abstract Amines—organic molecules carrying the –NH 2 moiety—have been recognized as a vital intermediate in formation of prebiotic such amino acids and nucleobases. Here we report vinylamine (C H 3 NH ), which was recently detected toward G+0.693–0.027, interstellar ice analogs composed acetylene ) ammonia (NH exposed to energetic electrons. Our experiments mimic cascades secondary electrons tracks galactic cosmic rays impinging on molecular clouds. Tunable photoionization reflectron...
Abstract Enols—tautomers of ketones or aldehydes—are considered key intermediates in the formation prebiotic sugars and sugar acids. Although laboratory simulation experiments suggest that enols should be ubiquitous interstellar medium, underlying mechanisms environments are largely elusive. Here, we present on glyoxal (HCOCHO) along with its ynol tautomer acetylenediol (HOCCOH) ice analogs composed carbon monoxide (CO) water (H 2 O) upon exposure to energetic electrons as a proxy for...
This paper presents a controller for lane keeping system (LKS), and the method of reference trajectory generation is interpolating five preview points obtained by sensors. Its mean purpose to reduce demand sensors only using points. Also distance between these determined longitudinal velocity. The computation has been achieved casting model predictive control (MPC) tracking problem into quadratic programming (QP) problem. steering angle minimized generate optimal sequence effectiveness...
We unravel, for the very first time, formation pathways of hydroxyacetone (CH3COCH2OH), methyl acetate (CH3COOCH3), and 3-hydroxypropanal (HCOCH2CH2OH), as well their enol tautomers within mixed ices methanol (CH3OH) acetaldehyde (CH3CHO) analogous to interstellar in ISM exposed ionizing radiation at ultralow temperatures 5 K. Exploiting photoionization reflectron time-of-flight mass spectrometry (PI-ReToF-MS) isotopically labeled ices, reaction products were selectively photoionized...