When the protocol that we had used to demonstrate a single division of bacterial cells in airborne particles was changed to one that increased the glycerol content of the atomizer fluid from 1 to 5% (vol/vol), thus producing larger particles, more than two (and nearly three) divisions of bacteria occurred within 6 h of aerosol time.
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http://dx.doi.org/10.1128/aem.38.4.642-643.1979 | DOI Listing |
Clin Oral Investig
January 2025
Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland.
Objectives: To compare the impact of intaglio surface treatments - airborne particle abrasion and hydrofluoric acid (HF) etching - of feldspar ceramic (FEL) crowns on the fracture load (FL) and to investigate the effects of abutment materials and artificial aging. The aim was to assess whether etching could be replaced by an alternative surface roughening method.
Materials And Methods: FEL crowns had their intaglio surfaces either abraded (25 µm AlO, 0.
Polymers (Basel)
December 2024
Faculty of Engineering, "Dunărea de Jos" University, 800008 Galati, Romania.
The wind turbine blades are exposed, during functioning, to the abrasive wear generated by the impact with air-borne sand particles. In this work, samples of a commercial wind turbine blade, made of a multi-layered composite material, are subjected to abrasive wear tests, using an air streamed wearing particles test rig. Following the analysis of the tests' results was found that the only protection against failure of the blade by abrasive damage is the surface layer.
View Article and Find Full Text PDFMicroorganisms
December 2024
Department of Environmental Science, University of Arizona, Tucson, AZ 85719, USA.
Resuspended particles from human activities can contribute to pathogen exposure via airborne fomite contamination in built environments. Studies investigating the dissemination of resuspended viruses are limited. The goal of this study was to explore viral dissemination after aerosolized resuspension via human activities on indoor flooring.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
Faculty of Chemical and Process Engineering, Warsaw University of Technology, 00-645 Warsaw, Poland.
This study explores the fabrication of electret nonwoven structures for high-efficiency air filtration, utilizing the blow spinning technique. In response to the growing need for effective filtration systems, we aimed to develop biodegradable materials capable of capturing fine particulate matter (PM2.5) without compromising environmental sustainability.
View Article and Find Full Text PDFBioengineering (Basel)
December 2024
Modern College of Arts, Science, and Commerce, Pune 411005, India.
A green and cost-effective sonochemical synthetic method was followed for coating silver-modified copper oxide (Ag-CuO) nanoparticles (NPs) on disposable surgical mask. The NP-coated masks were systematically characterized using XRD and FT-IR for understanding the structural and surface functionalities. In addition, the field emission scanning electron microscopy (FE-SEM) analysis showed the homogeneous coating of Ag-CuO NPs over the mask fibers.
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