We describe the occurrence of an iatrogenic explosion induced by argon plasma coagulation in a 70-year-old man undergoing gastroscopy. Combustible gases in the stomach may have been released by bacterial overgrowth as a result of partial gastric outlet obstruction (caused by a gastric tumor) and reduced acidity (from proton pump inhibitor therapy). We propose a stepwise process during upper endoscopy to prevent this devastating complication, comprising aspiration, preinsufflation with CO2, and then coagulation.
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http://dx.doi.org/10.1016/j.cgh.2014.06.033 | DOI Listing |
J Environ Manage
December 2024
Federal University of Ouro Preto, Brazil. Electronic address:
This study introduces a comprehensive methodology for selecting blasthole diameters in open-pit mining, aiming to reduce the environmental impact while addressing the limitations of traditional empirical methods that often yield suboptimal productivity, cost efficiency. By integrating critical parameters such as bench height, rock and explosive properties, desired fragmentation size, production scale, and operational specifics, the methodology seeks to minimize negative effects on nearby communities while optimizing blasting practices. The methodology consists of four key steps: calculating potential diameters based on bench height, verifying influential factors affecting diameter selection, assessing environmental impacts of blasting activities, such as blasting-induced vibration and flyrock, and ultimately choosing the optimal diameter.
View Article and Find Full Text PDFJ Phys Chem Lett
December 2024
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China.
Alkali element doping has significant physical implications for two-dimensional materials, primarily by tuning the electronic structure and carrier concentration. It can enhance interface electronic interactions, providing opportunities for effective charge transfer at metal-organic interfaces. In this work, we investigated the effects of gradually increasing the level of K doping on the lattice structure and electronic properties of an organometallic coordinated Kagome lattice on a Ag(111) surface.
View Article and Find Full Text PDFHeliyon
December 2024
Department of Chemical Engineering, National Cheng Kung University, Tainan, 702, Taiwan.
Increasing attention has been paid to the detection of explosives due to the occurrence of terrorist attacks around the world. Here, we used free radical polymerization to develop two different types of fluorescent copolymers for use in detecting picric acid. One exhibits aggregation-caused quenching (ACQ) and is called PNNS [poly (-isopropyl acrylamide---hydroxymethyl acrylamide --styrene-pyrene), poly (NIPAAm--NMA--St-Py)].
View Article and Find Full Text PDFPhys Chem Chem Phys
December 2024
Department of Chemistry, University of North Bengal, Raja Rammohunpur, Darjeeling, West Bengal, 734013, India.
Organic luminescent materials having photoluminescence in their solid state have become emerging trends in chemistry, materials science, and biology due to their versatile potential applications. In the present contribution, we have introduced some methylenebis(4,1-phenylene) electron donor-acceptor-based fashionable solid-state fluorescent molecules, MBA, MBB, and MBH, having exciting photoluminescence characteristics in their solid and aggregate states. Interestingly, all probes exhibited a compelling aggregation-induced enhanced emission (AIEE) phenomenon in aqueous media.
View Article and Find Full Text PDFPLoS One
December 2024
Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
Analytical methods for the determination of microplastics in sediments typically involve matrix drying, sieving, grinding, and flotation as part of the sample treatment. However, the real need for these steps and analytical validation studies are scarce. This work proposes a method that avoids the drying, sieving, and flotation procedures by using a direct acid attack of HNO₃/HCl (3:1) on wet sediment samples, assisted by microwave digestion.
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