A5018515462- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Phytochemistry and Biological Activities
- Natural Compound Pharmacology Studies
- Air Quality Monitoring and Forecasting
- Natural product bioactivities and synthesis
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Inflammatory mediators and NSAID effects
- Cytokine Signaling Pathways and Interactions
- Environmental and Agricultural Sciences
- Plant-derived Lignans Synthesis and Bioactivity
- Hops Chemistry and Applications
- Infrared Target Detection Methodologies
- Environmental Changes in China
- Cancer Mechanisms and Therapy
- Image Enhancement Techniques
- Thermal Radiation and Cooling Technologies
- Biological Activity of Diterpenoids and Biflavonoids
- Histone Deacetylase Inhibitors Research
- Media Influence and Health
- Solar Radiation and Photovoltaics
- Advanced Image and Video Retrieval Techniques
Zhengzhou University
2013-2025
China Meteorological Administration
2018-2024
Beijing Normal University
2024
Hong Kong Baptist University
2020-2021
Tsinghua University
2002-2018
China Pharmaceutical University
2011-2016
Texas A&M University at Galveston
2015
Abstract. A regional fully coupled meteorology–chemistry model, Weather Research and Forecasting model with Chemistry (WRF-Chem), was employed to study the seasonality of ozone (O3) pollution its sources in both China India. Observations results suggest that O3 North Plain (NCP), Yangtze River Delta (YRD), Pearl (PRD), India exhibit distinctive seasonal features, which are linked influence summer monsoons. Through a factor separation approach, we examined sensitivity individual...
Abstract. Extreme particulate matter (PM) air pollution of January 2013 in China was found to be associated with an anomalous eastward extension the Siberian High (SH). We developed a position index (SHPI), which depicts mean longitudinal SH, as new indicator large-scale circulation pattern that controls wintertime quality China. This SHPI explains 58 % (correlation coefficient 0.76) interannual variability aerosol optical depth (AOD) retrieved by MODIS over North (NC) during 2001–2013. By...
The fructus of Kadsura coccinea known as 'Bu-Fu-Na' is an emerging internet-famous fruit. For deep processing related products, approach combining LC-MS analysis, network pharmacological prediction, and experimental validation was adopted to explore phytochemicals biological functions K. pericarpium (KCP) for the first time. In total, 9 lignans 11 triterpenoids in KCP chloroform extract were identified by HPLC-Q-TOF/MS, these chemicals acted on their key targets through multiple signaling...
Abstract. The Bermuda High (BH) quasi-permanent pressure system is the key large-scale circulation pattern influencing summertime weather over eastern and southern US. Here we developed a multiple linear regression (MLR) model to characterize effect of BH on year-to-year changes in monthly-mean maximum daily 8 h average (MDA8) ozone Houston–Galveston–Brazoria (HGB) metropolitan region during June, July, August (JJA). indicators include longitude western edge (BH-Lon) intensity index (BHI)...
Abstract The diurnal cycle of surface ozone is directly influenced by the chemistry and meteorological processes which affect a region. This study uniquely employs clustering methodology to examine complete pattern for Houston‐Galveston‐Brazoria region links identified patterns regimes June, July, August 3 years (2011, 2014, 2015). Four features were implemented into algorithm: rate decrease at night, daily minimum before sunrise, increase after an average afternoon ozone. clusters chosen,...
In the process of tower photothermal power generation, solar radiation undergoes attenuation whole atmosphere, reaches heliostat and then is reflected to heat collector. The transfer from collector occurs at an altitude 0 300m ground, which defined be near-surface layer in this study concentrated with high aerosol loadings. Thus, extinction effects aerosols are crucial site selection generation evaluation efficiency.In work, we first analyzed vertical distribution over North China (NC) its...
A phytochemical study of Baeckea frutescens afforded a new biflavonoid named as baeckein E (1), along with four known C-methylated flavonols, baeckeins (2) and B (3), 6-methylquercetin (6) 6-methylquercetin-4′-O-β-d-glucopyranoside (7), two biflavonoids C (4) D (5). The structure compound 1 was elucidated on the basis spectroscopic analysis, including HR-ESI-MS, 1D 2D NMR spectra, absolute configurations C-2 C-3 for were assigned by circular dichroism spectrometry combined quantum chemical...
Baeckeins C (compound 1) and D 2), a pair of new diastereomeric biflavonoids, were isolated from the roots Baeckea frutescens . Their structures elucidated on basis spectroscopic analysis, including HR‐ESI‐MS one‐ two‐dimensional NMR spectra ( 1 H 13 NMR, HSQC, HMBC, ROESY). The absolute configurations 2,3‐epoxide moiety for compounds 2 determined by circular dichroism spectrometry combined with quantum chemical calculations. Copyright © 2011 John Wiley & Sons, Ltd.
Abstract We examine relationships between day‐to‐day variations in the large‐scale atmospheric circulation and occurrence, intensity, duration of haze during several recent winters, beginning with a focused examination Beijing 2013–2017 then evaluating extent to which findings applied other urban areas China 2015–2017. Composite analysis for indicates that preferentially occurred when East Asian winter monsoon (EAWM; based on potential vorticity) Siberian High (SH; sea level pressure) were...
Abstract A pair of novel isomeric 6‐methylflavonoids, named baeckeins ( 1 ) and B 2 ), were isolated from the roots Baeckea frutescens. The two compounds possess a unique C 23 skeleton, resulting 6‐methylation 8‐arylation flavonol (=3‐hydroxy‐2‐phenyl‐4 H ‐1‐benzopyran‐4‐one) framework formation an unusual lactone ring E. Their structures elucidated by detailed spectroscopic analyses, including HR‐ESI‐MS 1D‐ 2D‐NMR data (HSQC, HMBC, ROESY). plausible biogenetic pathway for is also proposed Scheme ).
ABSTRACT Introduction The whole herb of Potentilla discolor has long been used for treatment diarrhoea, malaria, haemoptysis and haematemesis in clinical applications. However, until now, there no literature regarding to the quality control it. Objective To develop a simple accurate HPLC‐DAD (diode array detection)–ESI/MS n (electrospray ionisation multistage mass spectrometry) method identification constituents P. simultaneous quantification its marker compounds. Methodology Separations...
Based on the Simple Model for Atmospheric Transmission of Sunshine and meteorological observations, a simulation method atmospheric transmittance between tower solar thermal power heliostats heat receivers is developed. This verified by vertical radiation observations in Tianjin, China. The results indicate remarkable differences simulated global horizontal irradiation (GHI) under different weather types, magnitude difference mainly influenced near-surface visibility cloud cover. However,...
AbstractThis article marks the first report on high-performance liquid chromatography (HPLC) coupled with diode-array detection (DAD) and quadruple time-of-flight mass spectrometry (Q-TOF/MS) for identification quantification of main bioactive constituents in Baeckea frutescens. In total, 24 compounds were identified or tentatively characterised based their retention behaviours, UV profiles MS fragment information. Furthermore, a validated method good linearity, sensitivity, precision,...
Baeckea frutescens is an aromatic shrub used as ornamentals and food flavor spices in the southern part of P. R. China. Two novel C ‐methylated biflavonoids named baeckeins J ( 1 ) K 2 were isolated from roots B. , which possessed unique carbon skeleton conjugated a flavonol one isoflavanonol molecule via linkages C(2)–C(8*) C(3)–O–C(7*). The structures compounds elucidated by analysis 1D‐ 2D‐NMR, HR‐ESI‐MS spectral data, absolute configuration for chiral C‐atoms C(2) C(3) assigned CD...
Background The triglyceride-lowering drug, icosapent ethyl (IPE), was granted a new indication for the reduction of atherosclerotic cardiovascular disease risk in 2019. This study aimed to investigate safety profile IPE by mining FDA Adverse Event Reporting System (FAERS) database.
Baeckea frutescens is a medicinal plant distributing from Southeast Asia to Australia. A pair of novel diastereomeric C-methylated triflavonoids named baeckeins L (1) and M (2) were isolated the roots B. frutescens. The structures these isolates elucidated by analysis 1D (1H/13C) 2D NMR (HSQC/HMBC/NOESY) HR-ESI-MS spectroscopic data, absolute configurations chiral carbons (C-2/C-3/C-2°/C-3°) established CD spectrometry combined with quantum chemical calculations.
Abstract. The Bermuda High (BH) quasi-permanent pressure system is the key large-scale circulation pattern influencing summertime weather over eastern and southern US. Here we developed a multiple linear regression (MLR) model to characterize effect of BH on year-to-year changes monthly-mean maximum daily 8-hour average (MDA8) ozone in Houston-Galveston-Brazoria (HGB) metropolitan region during June, July August (JJA). indicators include longitude western edge (BH-Lon), intensity index (BHI)...