Results 21 to 30 of about 341,594 (385)

Practicalities and Driving Dynamics of a Real Driving Emissions (RDE) Euro 6 Regulation Homologation Test

open access: yesEnergies, 2019
One of the most important sources of air pollution, especially in urban areas, is the exhaust emissions from passenger cars. New European emissions regulations, to minimize the gap between manufacturer-reported emissions and those emitted on the road ...
Timothy Bodisco, Ali Zare
doaj   +1 more source

Can aerosols-generating dental, oral and maxillofacial, and orthopedic surgical procedures lead to disease transmission? An implication on the current COVID-19 pandemic

open access: yesFrontiers in Oral Health, 2022
Various dental, maxillofacial, and orthopedic surgical procedures (DMOSP) have been known to produce bioaerosols, that can lead to the transmission of various infectious diseases.
Essam Ahmed Al-Moraissi   +4 more
doaj   +1 more source

Turbulent thermal diffusion of aerosols in geophysics and laboratory experiments [PDF]

open access: yes, 2004
We discuss a new phenomenon of turbulent thermal diffusion associated with turbulent transport of aerosols in the atmosphere and in laboratory experiments.
Buchholz, J.   +6 more
core   +4 more sources

Measurement of PM2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

open access: yesIEEE Access, 2019
Particulate matter (PM) is one of the most critical air pollutants, and various instruments have been developed to measure PM mass concentration. Of these, quartz crystal microbalance (QCM) based instruments have received much attention.
Nhan Dinh Ngo   +3 more
doaj   +1 more source

CHX and a Face Shield Cannot Prevent Contamination of Surgical Masks

open access: yesFrontiers in Medicine, 2022
BackgroundBacterial contamination on surgical masks puts a threat to medical staff and patients. The aim of the study was to investigate its contamination during dental treatments, wearing a face shield and performing a pre-procedural mouth rinsing with ...
Madline P. Gund   +8 more
doaj   +1 more source

Photophoresis – a Forgotten Force ??

open access: yesKONA Powder and Particle Journal, 2014
In general a force will act on a particle illuminated by light or other radiation and absorbing part of the flux, and as a consequence a motion will result.
Helmuth Horvath
doaj   +1 more source

Risk assessment for airborne disease transmission by poly-pathogen aerosols [PDF]

open access: yes, 2020
In the case of airborne diseases, pathogen copies are transmitted by droplets of respiratory tract fluid that are exhaled by the infectious and, after partial or full drying, inhaled as aerosols by the susceptible. The risk of infection in indoor environments is typically modelled using the Wells-Riley model or a Wells-Riley-like formulation, usually ...
arxiv   +1 more source

Constraints on climate forcing by sulphate aerosols from seasonal changes in Earth's spin [PDF]

open access: yes, 2014
Angular momentum exchanges between atmosphere and solid Earth are strongly modulated by variations in global atmospheric circulation. Geodetically determined length-of-day (LOD) fluctuations provide an independent resource to investigate climate ...
SOTTILI, Gianluca
core   +1 more source

Seasonal characteristics of PM1, PM2.5, and PM10 over Varanasi during 2019–2020

open access: yesFrontiers in Sustainable Cities, 2022
Particulate matter (PM) concentrations and aerosol optical depth (AOD) are measured and correlated simultaneously using a high-volume sampler and a MICROTOPS-II Sunphotometer, respectively.
Prashant Kumar Chauhan   +3 more
doaj   +1 more source

Chemical ageing and transformation of diffusivity in semi-solid multi-component organic aerosol particles [PDF]

open access: yes, 2011
Recent experimental evidence underlines the importance of reduced diffusivity in amorphous semi-solid or glassy atmospheric aerosols. This paper investigates the impact of diffusivity on the ageing of multi-component reactive organic particles ...
Pfrang, Christian   +2 more
core   +3 more sources

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