Beijing Municipal Ecological and Environmental Monitoring Center

Shifting patterns of Ozone Season due to policy and human activity in Beijing between 2013 and 2023

Abstract. Since 2013, Beijing has implemented a series of stringent measures to control air pollution, resulting in significant improvements in air quality. This study analyzed the variations in ozone pollution in Beijing over the past decade, focusing on the influence of human a...

From Destruction to Reconstruction: Substrate-Driven Biosynthesis of Antioxidants from Antibiotic Residues in Hyperthermophilic Composting

Abstract The accumulation of tetracycline (TC) in organic fertilizers poses severe risks by fostering antibiotic resistance in soil ecosystems. Hyperthermophilic composting effectively mitigates these threats, achieving nearly complete TC removal via thermal selection. Although p...

First report of the complete mitochondrial genome of Microtendipes famiefeus Sasa, 1996 (Diptera: Chironomidae)

The complete mitochondrial genome of Microtendipes famiefeus was sequenced in this study. The circular mitogenome is 16,034 bp and comprises 13 protein-coding genes, 22 tRNAs, two rRNAs, and one control region. The mitogenome exhibits a strong A + T bias (76.4%) and a conserved g...

Simulation and Multi-Time Scale Attribution Analysis of Actual Evapotranspiration in the Source Region of the Yangtze River, China

The Yangtze River Basin is a critical water supply region in China. To quantify the contributions of climate change and human activities to water resources across multiple temporal scales, this study focuses on actual evapotranspiration (AET), which directly influences water avai...

Temporal Evolution and Vertical Distribution of Size-Resolved Aerosol Composition and Mixing State within the Boundary Layer Using an Unmanned Aerial Vehicle

Abstract Characteristics of individual particles and aerosol mixing state strongly influence atmospheric chemistry, radiation, and cloud formation yet remain poorly constrained. Here, we investigated the spatiotemporal evolution of size-resolved particle composition in a coastal...

Pyrolysis-Tuned Dual-Function Biochar-Derived Dissolved Organic Matter Drives Redox Coupling for Deep PFAS Defluorination in UV/Sulfite Systems

Abstract The growing use of biochar is increasing the release of biochar-derived dissolved organic matter (BDOM) in surface waters. Concurrently, remediation of persistent per- and polyfluoroalkyl substances (PFAS) remains challenging. Although natural DOM can both photosensitize...

Conductive Network Evolution and Self-Sensing Mechanism of Carbon Fiber Asphalt Concrete Based on Electrical Impedance Spectroscopy

To overcome the problems of poor durability and structural incompatibility inherent in conventional urban traffic monitoring technologies, this study develops a self-sensing asphalt concrete composite incorporating carbon fiber (CF) as a conductive functional filler to construct...

Integrated Adaptive Responses of Rhizosphere Microbial Communities and Functional Genes to Cadmium Stress in Ryegrass (Lolium perenne L.)

Heavy metal pollution impacts on soil microorganisms are of growing concern. This study employed high-throughput sequencing and qPCR to investigate rhizosphere microbial communities and functional genes responses in ryegrass (Lolium perenne L.) under cadmium (Cd) stress. Results...

Environmental DNA Metabarcoding Reveals the Variations in Fish Diversity Across the Yangtze River Basin and the Effects of the Three Gorges Dam

It is imperative that freshwater fish biodiversity research incorporates diverse components, encompassing taxonomy, phylogeny and function, alongside multifaceted facets, including richness, divergence and regularity. This comprehensive approach is essential to facilitate a more...

E3 Ubiquitin LigasePdSINA2D in Populus deltoides Positively Regulates ABA-Dependent StressTolerance through Ubiquitination of FREE1 in Poplar

Abstract Populus deltoides “Shalinyang” (PdS) displays reduced tolerance to abiotic stresses. SINA (seven in absentia) proteins, a subtype of E3 ubiquitin ligases, play crucial roles in regulating plant growth and responses to abiotic stresses. However, the characteristics and po...

Impact of ozone pollution on gross primary productivity during a large-scale emission reduction: Implications for strengthening carbon sink over megacity clusters in China

Ozone (O 3 ) pollution poses a significant threat to plant growth and diminishes ecosystem carbon sequestration capacity in China, representing a critical challenge to achieving “dual carbon” goals. A large-scale emission reduction that occurred during the Coronavirus disease 201...

Mannose Ameliorates Radiation-Induced Intestinal Injury in Mice via Preventing Mitochondrial Dysfunction

Aims: Radiation-induced intestinal injury (RIII) severely compromises the quality of life in patients undergoing abdominal/pelvic radiotherapy and may necessitate treatment discontinuation. To date, there is no approved agent for the prevention or treatment of RIII. This study ai...

Flocculation and Dewatering Mechanisms of Pyrite Flotation Tailings: Synergistic Roles of Polyferric Chloride, Polydiallyldimethylammonium Chloride, and Skeleton Builders on Microstructure Evolution

This study investigates the conditioning and deep dewatering of pyrite tailings slurry using a composite system comprising polyferric chloride (PFC), polydiallyldimethylammonium chloride (PDMDAAC), and fly ash as a skeleton builder. The synergistic application significantly enhan...