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An online segmented continuous flow analysis system for rapid determining chemical oxygen demand in seawater to assess organic pollution levels.
Mar Pollut Bull
January 2025
Coastal Zone Ecological Environment Monitoring Technology and Equipment Shandong Engineering Research Center, CAS Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong 266071, China; Shandong Key Laboratory of Coastal Environmental Processes, Yantai, Shandong 264003, China. Electronic address:
By integrating ultraviolet (UV) photocatalytic oxidation digestion with segmented continuous flow analysis technology, an online measurement method and analysis system for the alkaline chemical oxygen demand (COD) in seawater, based on the color-change reaction of potassium permanganate, has been established. This represents the first application of UV photocatalytic oxidation technology in the measurement of COD in seawater. The system effectively overcomes the limitations of high-temperature and high-pressure digestion methods employed in traditional COD analysis.
View Article and Find Full Text PDFProbing the Redox Reactivity of Alkyl Bound Astatine: A Study on the Formation and Cleavage of a Stable At-C Bond.
Inorg Chem
January 2025
Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States.
The formation of a stable alkyl At-C bond occurs during the shipment of At on a 3-octanone-impregnated column and the reactivity of At stripped from columns has been studied. The At could not be recovered from the 3-octanone organic phase using nitric acid or sodium hydroxide, even up to 10 and 15.7 M, respectively.
View Article and Find Full Text PDFSurvival after aluminum phosphide poisoning with cardiotoxicity: a case report.
J Med Case Rep
December 2024
Department of Internal Medicine, Woldia Comprehensive Specialized Hospital, Woldia, Ethiopia.
Introduction: Aluminum phosphide is a cheap and commonly used rodenticide that is also an effective solid fumigant and frequently used for grain preservation. The pill contains around 44% inert elements (ammonium carbonate) to avoid disintegration of the tablet, while the rest (about 56%) is aluminum phosphide. Because it is freely available on the market, it is one of the commonly used agents for self-poisoning in different parts of the developing world.
View Article and Find Full Text PDFSaprolegniasis is one of the most dangerous fungal diseases of fish, causing significant mortality in fish hatcheries and young ones. The present study aimed to isolate and characterize the causative fungus from fingerlings of Pangasianodon hypophthalmus cultured intensively in freshwater cages in Indian reservoirs and to determine minimum inhibitory concentrations of different antifungal compounds against the fungal hyphae and zoospores. The fungal isolates grown on potato dextrose agar showed an abundance of gemmae, elongated mycelia, non-septate hyphae, primary zoospores, mature zoosporangia with numerous zoospores, cysts with bundles of long hairs and were further identified as Saprolegnia parasitica following PCR amplification and sequencing of internal transcribed spacer region.
View Article and Find Full Text PDFPreparation of chitin-derived hierarchical porous materials and their application and mechanism in adsorption of mycotoxins.
Int J Biol Macromol
December 2024
State Key Laboratory of Refractories and Metallurgy, Key Laboratory of Coal Conversion & New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, PR China. Electronic address:
In this study, the hierarchical porous materials for adsorbing mycotoxins were prepared by one-step carbonization-activation method using potassium permanganate (KMnO) and chitin as activators and carbon source, respectively. The hierarchical porous materials had different specific surface area and pore distribution owing to different carbonization temperatures. In this paper, the effects of pH, time and temperature of adsorption as well as the concentration of patulin on the adsorption characteristics were systematically investigated.
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