A5077019023- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Marine and coastal ecosystems
- Air Quality Monitoring and Forecasting
- Bioactive Natural Diterpenoids Research
- Vehicle emissions and performance
- Marine Biology and Ecology Research
- CRISPR and Genetic Engineering
- Geology and Paleoclimatology Research
- RNA and protein synthesis mechanisms
- Atmospheric aerosols and clouds
- Microbial Metabolic Engineering and Bioproduction
- Odor and Emission Control Technologies
- Phytochemistry and Biological Activities
- Water Quality Monitoring and Analysis
- Catalytic Processes in Materials Science
- Graphene research and applications
- Plant biochemistry and biosynthesis
- Advanced Chemical Physics Studies
- Bacterial Genetics and Biotechnology
- Ferroelectric and Negative Capacitance Devices
- Marine and environmental studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Isotope Analysis in Ecology
Shenyang Pharmaceutical University
2022-2025
Ocean University of China
2003-2024
State Key Joint Laboratory of Environment Simulation and Pollution Control
2016-2024
Peking University
2007-2024
ShanghaiTech University
2020-2024
Sichuan University
2021-2024
West China Hospital of Sichuan University
2024
Zhengzhou University
2016-2024
Theranostics (New Zealand)
2024
East China Normal University
2022-2024
Abstract. Nitro-aromatic compounds (NACs), as important contributors to the light absorption by brown carbon, have been widely observed in various ambient atmospheres; however, their formation urban atmosphere was little studied. In this work, we report an intensive field study of NACs summer 2016 at Beijing site, characterized both high-NOx and anthropogenic VOC dominated conditions. We investigated factors that influence NAC (e.g., NO2, precursors, RH photolysis) through quantification...
Abstract. Organosulfates (OSs) with ambiguous formation mechanisms are a potential source of missing secondary organic aerosol (SOA) in current atmospheric models. In this study, we chemically characterized OSs and nitrooxy-OSs (NOSs) formed under the influence biogenic emissions anthropogenic pollutants (e.g., NOx, SO42−) summer Beijing. An ultrahigh-resolution mass spectrometer equipped an electrospray ionization was applied to examine overall molecular composition S-containing organics....
The molecular composition of humic-like substances (HULIS) in different aerosol samples was analyzed using an ultrahigh-resolution mass spectrometer to investigate the influence biomass burning on ambient composition. HULIS background aerosols were characterized with numerous formulas similar biogenic secondary organic aerosols. abundance nitrogen-containing compounds (NOC), including bases (N-bases) and nitroaromatics, increased dramatically affected by crop residue farm field. distribution...
Abstract. Nocturnal reactive nitrogen compounds play an important role in regional air pollution. Here we present the measurements of dinitrogen pentoxide (N2O5) associated with nitryl chloride (ClNO2) and particulate nitrate (pNO3-) at a suburban site Beijing summer 2016. High levels N2O5 ClNO2 were observed outflow urban masses, 1 min average maxima 937 2900 pptv, respectively. The uptake coefficients, γ, yield, f, experimentally determined from parameters. coefficient ranged 0.012 to...
Abstract. A time-of-flight chemical ionization mass spectrometer (CIMS) utilizing the Filter Inlet for Gas and Aerosol (FIGAERO) was deployed at a regional site 40 km north-west of Beijing successfully identified measured 17 sulfur-containing organics (SCOs are organo/nitrooxy organosulfates sulfonates) with biogenic anthropogenic precursors. The SCOs were quantified using laboratory-synthesized standards lactic acid sulfate nitrophenol organosulfate (NP OS). variation in field observations...
To elucidate the influence of long-range transported biomass burning organic aerosols (BBOA) on Tibetan Plateau, molecular compositions and light absorption HUmic-Like Substances (HULIS), major fractions brown carbon, were characterized during premonsoon season. Under significant burning, HULIS concentrations increased to as high 26 times background levels, accounting for 54% water-soluble carbon (WSOC) 50% (OC). The also enhanced up 42 contributing 61% WSOC OC absorption. Meanwhile,...
Brown Carbon (BrC) aerosols scatter and absorb solar radiation, directly affecting the Earth's radiative budget. However, considerable uncertainty exists concerning chemical mechanism leading to BrC formation their optical properties. In this work, particles were prepared from mixtures of small α-dicarbonyls (glyoxal methylglyoxal) amines (methylamine, dimethylamine, trimethylamine). The absorption scattering measured using a photoacoustic extinctometer (405 532 nm), composition...
Abstract. Nitryl chloride (ClNO2) accumulation at night acts as a significant reservoir for active chlorine and impacts the following day's photochemistry when atom is liberated sunrise. Here, we report simultaneous measurements of N2O5 suite inorganic halogens including ClNO2 reactions with volatile organic compounds (Cl–VOCs) in gas particle phases utilising Filter Inlet Gas AEROsols time-of-flight chemical ionisation mass spectrometer (FIGAERO-ToF-CIMS) during an intensive measurement...
Gene therapy is limited by inefficient delivery of large clustered regularly interspaced short palindromic repeat (CRISPR) effectors, such as Cas9 and Cas12a nucleases. Cas12f nucleases are currently one the most compact CRISPR genome editors. However, available toolkit efficient editors limited. Here, we report characterization engineering a miniature CRISPR-Cas12f system from Syntrophomonas palmitatica (SpaCas12f1, 497 amino acids). We show that CRISPR-SpaCas12f1 cleaves double-stranded...
Abstract. To improve air quality, the Beijing government has employed several pollution control measures since 2008 Olympics. In order to investigate organic aerosol sources after implementation of these measures, ambient fine particulate matter was collected at a regional site in Changping (CP) and an urban Peking University Atmosphere Environment Monitoring Station (PKUERS) during “Photochemical Smog China” field campaign summer 2016. Chemical mass balance (CMB) modeling tracer yield...
Organosulfates (OSs) are an important group of secondary organic aerosols, but the key influential factors their formation in polluted atmospheres not well understood. In this study, we monitored particulate OSs (carboxy OSs, hydroxyacetone sulfate, and isoprene- monoterpene-derived OSs) at urban site a regional Beijing examined compositions pathways under contrasting atmospheric conditions. The quantified were most abundant summer due to higher biogenic emissions favorable conditions...
Gaseous dicarboxylic acids (diacids) are suggested to participate in atmospheric new particle formation via bonding with sulfuric acid (SA), ammonia (NH3), amines, and other molecules. However, there is a lack of observational evidence for the involvement diacids nucleation. Comprehensive measurements were conducted at rural site North China Plain winter, unexpectedly high nucleation rates (JOBS, 30.5–839.7 cm–3 s–1) observed under low SA levels (0.7 × 106 4.4 cm–3). Neither SA-NH3 nor...
Abstract Brown carbon (BrC) exhibits a highly complex chemical composition with diverse light‐absorbing properties, which complicates our understanding of its climate impacts. This study examined the impact molecular characteristics (including mass, unsaturation, oxidation state, and polarity) heteroatoms on properties (absorptivity wavelength dependence) BrC from perspective, based ultraviolet‐visible spectra over 40,000 substances in aerosol different sources ambience. Our findings reveal...
An analytic model for the endurance degradation of metal oxide based RRAM is presented first time. The behaviors under various operation modes can be predicted by model, which were verified measured data in different devices. Furthermore, 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sup> all 4-level resistance states HfO <sub xmlns:xlink="http://www.w3.org/1999/xlink">X</sub> -based demonstrated using proposed optimization scheme...
Abstract We investigated the ice nucleation activities of humic‐like substances (HULIS), an important component organic aerosol (OA), derived from atmospheric and biomass burning aerosols, produced aqueous‐phase chemical reactions. Respective HULIS can effectively trigger heterogeneous IN under mixed‐phase cloud conditions. active entities (IAE) were aggregates in size between 0.02 0.10 μm. At −20°C, IAE numbers per unit mass varied 213 to 8.7 × 10 4 mg −1 . Such results different than those...
Abstract The Sichuan Basin is one of the regions suffering from severe haze pollution in southwest China. However, secondary aerosol formation this region poorly understood. In study, chemical compositions PM 2.5 and molecular water‐soluble organics wintertime were measured to investigate sources under typical high relative humidity (RH) conditions. Strong correlations between , carbonaceous aerosols K + suggested influence biomass burning. impacts burning also supported by dominance...