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Heterogeneous seafloor deposition of heavy microplastics in the North Pacific estimated over 65 years.
Mar Pollut Bull
January 2025
Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan. Electronic address:
Marine plastic pollution has been a public concern for many decades; however, transport processes of heavy microplastics to the seafloor have long been overlooked given the difficulties in sampling and modeling. The distribution of heavy microplastic deposition on the seafloor in the North Pacific for 65 years since 1951, was estimated using a particle tracking model with 577,143,840 particles. The model revealed that 22 % of heavy microplastics were deposited over 100 km offshore from their release locations.
View Article and Find Full Text PDFPotential risk of microplastics in plateau karst lakes: Insights from metagenomic analysis.
Environ Res
January 2025
School of Life Science and Engineering, Southwest University of Science and Technology,Mianyang 621010, Sichuan, P.R. China; Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P. R. China. Electronic address:
Microplastic (MP) pollution has become one of global concern. While MP pollution in lakes has been well studied, research on MP sources, distribution, and ecological risks in the Tibetan Plateau is limited. We systematically investigated the MP abundance and distribution in alpine travertine lakes in Jiuzhai nature reserve located in east edge of Qinghai-Tibetan Plateau and assessed the distributions of microbiomes, antibiotic resistance genes (ARGs), and virulence factor genes (VFGs) in water, sediments, and MPs, using macrogenomics.
View Article and Find Full Text PDFCreating a multifunctional degrader for co-mineralization of p-nitrophenol and 1,2-dichloroethane and its application in wastewater bioremediation.
J Hazard Mater
January 2025
Key Laboratory of Molecular Microbiology and Technology for Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China. Electronic address:
Because the interactions among contaminants may lead to enhanced toxicity, combined pollution caused by the co-presence of multiple contaminants has increasingly gained public concern. p-Nitrophenol (PNP) and 1,2-dichloroethane (1,2-DCA) are frequently co-detected in groundwater. To completely eliminate PNP, 1,2-DCA and intermediates from polluted sites, in this study, a novel degrader KTU-PDG was created by functional assembly of PNP and 1,2-DCA biodegradation pathways in a robust chassis Pseudomonas putida KT2440.
View Article and Find Full Text PDFPatterns of microbial contamination on Northumberland Strait shores.
PLoS One
January 2025
Department of Biology, Mount Allison University, Sackville, NB, Canada.
The re-emergence of episodic faecal contamination of Parlee and Murray Corner beaches, on the Northumberland Strait of New Brunswick, Canada, in 2017, raised renewed community concerns on the health, environmental and tourism sustainability of these community resources, and led to creation of an Integrated Watershed Management Plan for the Shediac Bay Watershed (October 2021). In response we have to date compiled, curated and made accessible 205,772 microbial water quality data records spanning over 80 years from Southeastern New Brunswick and the Northumberland Strait. This dataset derives in large part from Shellfish Surveys completed by Environment and Climate Change Canada, along with data generated by multiple government agencies, Non-Governmental Organizations and citizen science sources.
View Article and Find Full Text PDFChemical composition, antibacterial and antioxidant activities of Piper betle and Anethum graveolens essential oils against Methicillin-resistant Staphylococcus aureus clinical isolates.
Braz J Microbiol
January 2025
Amity Institute of Biotechnology, Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh, 201313, India.
Methicillin-resistant Staphylococcus aureus (MRSA) is one of the leading causes of infection worldwide due to its antimicrobial resistance. Plant-derived essential oils (EOs) have undergone extensive observational and clinical research to explore their antimicrobial properties. The present study aimed to check mec A positive MRSA isolates using sequencing analysis, determination of chemical composition using gas chromatography-mass spectroscopy (GC-MS), antioxidant, and antimicrobial activity of Anethum graveolens and Piper betle EOs against the infectious agent MRSA.
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