A device is proposed, by which bigger plastic details for stomatological purposes can be formed via high air pressure. For that purpose, a gas flow is led away to a special bell through an armoured rubber hose from the compressive installation of the somatological unit. The plastic foil is fixed by a clip-holder, adjusted also for work with basis-plaques. After the formation of the foil-matrix and its cooling, the air pressure is stopped. The device is prompted by the desire to facilitate the production of details necessary for the clinic, for the dental mechanic laboratory and for the stomatological research work. The device has been put into practice in the Stomatological Faculty, HMI, Plovdiv.
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J Hazard Mater
December 2024
Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, United Kingdom; Material and Advanced Technologies for Healthcare, Queen's University of Belfast, 18-30 Malone Road, Belfast BT9 5DL, United Kingdom. Electronic address:
Microplastics (MPs) and Nanoplastics (NPs), a burgeoning health hazard, often go unnoticed due to suboptimal analytical tools, making their way inside our bodies through various means. Surface Enhanced Raman Spectroscopy (SERS), although is utilized in detecting NPs, challenges arise at low concentrations due to their low Raman cross section and inability to situate within hotspots owing to their ubiquitous size and shape. This study presents an innovative and cost-effective approach employing household metallic foils (aluminium and copper) as nanoparticle-on-film (NPoF) substrates for targeting such analytes.
View Article and Find Full Text PDFNanoscale
December 2024
Electronic Materials Laboratory, K. N. Toosi University of Technology, Tehran 1631714191, Iran.
Multibit/analog artificial synapses are in demand for neuromorphic computing systems. A problem hindering the utilization of memristive artificial synapses in commercial neuromorphic systems is the rigidity of their functional parameters, plasticity in particular. Here, we report fabricating polycrystalline rutile-based memristive memory segments with Ti/poly-TiO/Ti structures featuring multibit/analog storage and the first use of a tunable DC-biasing for synaptic plasticity adjustment from short- to long-term.
View Article and Find Full Text PDFWaste Manag
December 2024
Institute for Crop Science and Resource Conservation (INRES) - Soil Science and Soil Ecology, University of Bonn, Nussallee 13, 53115 Bonn, Germany. Electronic address:
Green and biowaste, processed within large facilities into compost, is a key fertilizer for agricultural and horticultural soils. However, due to improper waste disposal of plastic, its residues often remain or even lead to the formation ofmicroplastics (1 µm - 5 mm, MiPs) in the final compost product. To better understand the processes, we first quantified 'macroplastics' (> 20 mm, MaPs) input via biowaste collection into an industrial composting plant, and, then determined MiP concentrations at five stages during the composting process (before and after shredding and screening processes), and in the water used for irrigation.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
November 2024
Maria Curie-Sklodowska University, Institute of Chemical Sciences, Faculty of Chemistry, Department of Physical Chemistry, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland. Electronic address:
This article presents a simple and low-cost screening method based on optical microscopy and FT-IR spectroscopy for assessing microparticles found in rice. Five brands of rice packed in paper and foil bags from both the European Union (EU) and non-EU region were tested. Microparticles of various shapes have been found in the rice regardless of the packaging type and origin of the rice.
View Article and Find Full Text PDFEnviron Res
January 2025
School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, 116034, Liaoning, PR China.
Conventional plastic take-out food containers exert a substantial environmental impact, necessitating the identification of viable alternatives. A quantitative study assessed the environmental traits of five takeaway lunch boxes made from distinct materials (PP, PE-coated paper, pulp molding, aluminum foil, PLA). A life cycle assessment from 'cradle to grave' was conducted on the evaluation object.
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