The presence and distribution of antibiotics antibiotic resistance genes (ARGs) in rivers have attracted significant global concern. However, research on the contamination typical Sichuan Province, China, remains limited. This study aimed to assess residual levels across 42 national provincial monitoring sites nine within using UPLC-MS/MS. Ecological risk were evaluated through established assessment methods, Escherichia coli ( E . ) isolated from these waters was determined Kirby-Bauer disk...

We assess the issues of urban effects on precipitation over Pearl River Delta (PRD) metropolitan regions China. The spatial and temporal variations strong versus weak PRD surrounding nonurban areas are investigated. results show that urbanization signatures in significantly different from those areas. experiences more but less compared to regions. In addition, displays a pronounced seasonal variation. seasonality precipitation, however, is much weaker Moreover, strengthening intensity,...

This is a comprehensive study on mobilization/speciation and temporal/spatial variation of atmospheric arsenic (As) deposition in the Pearl River Delta (PRD) region. A set experimental procedures was established for measuring fluxes individual As species. The carrying inorganic AsIII % significantly higher than that contained particles. Compared with dry deposition, wet much more harmful to regional ecosystem, as it contributed majority bulk (>75%) carried most mobilized iAsIII compounds....

The lidar ratio (LR) is a key parameter for the retrieval of atmospheric optical parameters from equations. In this study, we simulated to investigate impact factors LR using three-component aerosol assumption based on Mie model. was generally related overall particle size aerosols, proportion elemental carbon (EC), as well mixing states and hygroscopicity. positively correlated with volume fraction (fEC). increased more than three-fold increase in fEC 0% 40%. core-shell (CS) state...

Rice false smut is an emerging and economically-important rice disease caused by infection the fungal pathogen Villosiclava virens. Ustiloxin B antimitotic cyclopeptide mycotoxin isolated from balls that formed in pathogen-infected spikelets. A monoclonal antibody (mAb) designated as mAb 1B5A10 was generated with ustiloxin B—ovalbumin conjugate. highly-sensitive specific indirect competitive enzyme-linked immunosorbent assay (icELISA) then developed. The median inhibitory concentration...

The first part of the sentence acknowledgments section should read: 'This work was supported by China National Basic Research (973) Program 2009CB421404...'

A gust front is generated when the cold downdraft from a thunderstorm reaches surface, causing warm air mass at surface to lift. This always accompanied by gusts and strong winds, results in severe destruction of property loss life, especially city areas. Despite potentially adverse effects associated with this weather phenomenon, microphysical structure fronts remains unclear, owing lack high temporal–spatial resolution observations, because research on thermodynamic insufficient. study...

Abstract Under the background of global climate change, typhoons have been attracting increasing attention due to their extraordinary destructive potential and great impact on coastal areas South China Sea. Although risk strong winds related has long interest, less is known about underlying mechanism responsible for severe near‐surface winds. Using eddy covariance data collected at four different heights a 365‐m meteorological tower located in region, characteristics convective typhoon...

This is one of a limited number studies that investigates multimedia exposure to metal(loid)s and the related human health risks caused by atmospheric deposition in China Asia. The aggregate included accidental ingestion dermal adsorption soil surface water, as well intake grains, fruits, vegetables, meats eggs, milk dairy products, freshwater fish. values variabilities factors were identified two major uncertainty sources. annual variations wet bulk propagated from particulate matter (PM) ×...

A shipborne micro-pulse lidar (Sigma Space Mini-MPL) was used to measure aerosol extinction coefficient over the northern region of South China Sea from 9 August 7 September 2016, first time a mini-MPL for observation cruise region. The goal experiment investigate if compact and affordable usable this measurements were calculate vertical profiles volume coefficient, depolarization ratio, atmospheric boundary layer height. Aerosol optical depth (AOD) lower southwest side region, compared...

Azotobacter vinelandii is a well-studied model system for nitrogen fixation in bacteria. Regulation of A. independent NtrB/NtrC, conserved regulatory proteobacteria. Previous work showed that an ntrC mutation resulted loss induction assimilatory nitrate and nitrite reductases encoded by the nasAB operon. In addition to NtrC, several other proteins, including NasT, protein containing potential RNA-binding domain ANTAR (AmiR NasR transcription antitermination regulators), have been implicated...

Atmospheric boundary layer (ABL) has a significant impact on the spatial and temporal distribution of air pollutants. In order to gain better understanding how ABL affects variation pollutants, atmospheric observations were performed at Sanshui in Pearl River Delta (PRD) region over southern China during winter 2013. Two types typical status that could lead pollution analyzed comparatively: weak vertical diffusion ability type (WVDAT) horizontal transportation (WHTAT). Results show (1) WVDAT...

Abstract A number of studies have brought up that turbulent transport dissimilarity between momentum and scalars, even among is a distinct feature the unstable boundary layer, affecting performance Monin–Obukhov similarity theory. Although source/sink distribution as well top‐down entrainment processes, are identified being responsible for dissimilarity, less known about role bulk‐shear‐generated non‐local large eddies. Using data collected by an eddy covariance system mounted on 70‐m...

Tetrabromobisphenol A (TBBPA) has been an important brominated flame retardant worldwide and become a widely concerned environmental pollutant due to its persistence in the environment. In this study, monoclonal antibody (MAb, designated 3D9G6) against TBBPA was produced, indirect competitive enzyme-linked immunoassay (icELISA) for detecting trace developed. The limit of detection half maximum inhibition concentration phosphate-buffered saline were 0.8 3.87 ng·mL−1, respectively. assay...

Quadrant analysis has been widely used to investigate the turbulent characteristics in atmospheric boundary layer (ABL). Although quadrant can identify structures that contribute significantly fluxes, approach hyperbolic hole and its parameter, referred as size, remains uncertain varies among different studies. This study discusses an improved with objective definition of size for isolation large coherent from small-scale background fluctuations. Eddy covariance data collected 50 m above...

Abstract A number of studies have reported that the traditional eddy covariance (EC) method generally underestimated vertical turbulent fluxes, leading to an outstanding non‐closure problem surface energy balance (SEB). Although it is recognized enlarged imbalance frequently coincides with increasing wind shear, role large eddies in affecting SEB remains unclear. On analyzing data collected by EC array, considerable horizontal inhomogeneity kinematic heat flux observed. The results show...

Abstract Worldwide interest has been generated by the presence and distribution of antibiotics antibiotic resistance genes (ARGs) in rivers. However, there was a dearth research on contamination Sichuan province’s typical rivers with antibiotics. In this study, residual level 42 national/provincial sites 9 analyzed UPLC-MS/MS, ecological risk evaluated using assessment method, drug E. coli water Kirby-Bauer method. Redundancy analysis demonstrated how affect structure microbial community...

The turbulent transport dissimilarity between momentum and scalars the similarity among have been widely investigated in unstable atmospheric boundary layers (ABLs). Although buoyancy mechanically driven turbulence, along with variations scalar sources sinks, are recognized as key factors influencing similarity, specific roles of local thermal plume-generated nonlocal bulk shear-generated large eddies under varying stability conditions less explored. This study utilized over four years eddy...