Aerosol Dose

Ruzer, L. S.; Apte, Michael G.; Sextro, R.G.

doi:10.1201/b12668-5

Cited by 3 publications

(4 citation statements)

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“…Aerosol processes considered in this study were (i) the coagulation of particles, (ii) the condensation and evaporation of water form droplets, and (iii) dry deposition Karl, et al (2016). The lung deposition model was based on ICRP (1994) with lung deposition efficiency from Gorbunov et al (2004) and Ruzer, et al (2005).…”

Section: Modelling Of Covid-19 Spread Via the Airmentioning

confidence: 99%

Aerosol Particles Laden with COVID-19 Travel Over 30m Distance

Gorbunov¹

2020

Preprint

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Effects of the convection flow, atmospheric diffusivity and humidity on evolution and travel distances of exhaled aerosol clouds by an infected person are considered. The aim of this work is to evaluate the importance of aerosol transmission routes and the effectiveness of the 2-metre separation distance policy. A potential impact of use of face masks on the infection transmission rate, and an opportunity to reduce infection in hospitals, care homes and other public spaces by appropriate monitoring and filtering of air are also considered. The results obtained demonstrate that aerosol particles generated by coughing and sneezing can travel over 30 m. Modelling of the evolution of aerosol clouds generated by coughing and sneezing enables us to evaluate the deposition dose of aerosol particles in healthy individuals. For example, a person in a public place (e.g. supermarket or car park) can accumulate in the respiratory system up to 200 virus copies in 2 min time by breathing in virus laden aerosols. Wearing face mask considerably reduces the deposited load down to 2 virus copies per 2 min. The modelling also suggests that it should be possible to measure Covid-19 within aerosol particles in hospitals and public places, e.g. care homes and supermarkets.

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Section: Modelling Of Covid-19 Spread Via the Airmentioning

confidence: 99%

Aerosol Particles Laden with COVID-19 Travel Over 30m Distance

Gorbunov¹

2020

Preprint

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“…Traditional theories hold that, windblown dust and sea salt from sea spray are the chief sources of environmental aerosol (Fuchs, 1989; Lighthart & Mohr, 1994; Ruzer & Harley, 2012). In recent years, a new mechanisms of aerosols generation reported by Joung (2015) shows that aerosols can be produced from raindrops impacting on porous surfaces.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Model of Soil Aerosol Generation and Vertical Transport During Rainfall

et al. 2023

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Related to human health, a myriad of viruses and microorganisms are adhered on the surfaces of the aerosols and may cause disease to spread widely through the respiratory tract (Chen et al., 2015;Huffman et al., 2013;Joung et al., 2017). It is also one of the main routes of transmission for COVID-19, which has taken a huge toll on the global human existence and economy in recent years (Bale et al., 2022;Firle et al., 2022;Le et al., 2021). An in-depth understanding of the mechanisms of aerosols generation and transport are critical to stopping the transmission of respiratory diseases like COVID-19.Traditional theories hold that, windblown dust and sea salt from sea spray are the chief sources of environmental aerosol (Fuchs, 1989;Lighthart & Mohr, 1994; Ruzer & Harley, 2012). In recent years, a new mechanisms of aerosols generation reported by Joung (2015) shows that aerosols can be produced from raindrops impacting on porous surfaces. When raindrops impact on porous surfaces such as soil and clay, bubbles will form in the droplets and then burst, leading to the generation of aerosols (Figure 1a). These aerosols are considered as a mainly

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“…O termo nanotecnologia, vem tendo muita força nos últimos anos, a nanotecnologia como tal, emergiu como uma alternativa de ponta e alcança diversos campos interdisciplinares como a física, biologia, química, medicina e ciência dos materiais [1]- [4]. De acordo com a IUPAC uma nanopartícula é definida como uma partícula de qualquer formato com dimensões na faixa de 1 a 100 nm [5], no entanto, não há razão específica para usar 100 nm como o tamanho que separa nanopartículas de não nanopartículas [6]. Assim, o princípio orientador da diferenciação de nanopartículas está essencialmente relacionado com a diferença entre as propriedades físicas exibidas por um material na sua forma macroscópica comparativamente à sua forma nanométrica (abaixo dos 100 nm) [7].…”

Section: Nanopartículas E Materiais Nanoestruturadosunclassified

“…Para avaliar este facto, é necessário calcular os valores do Fexperimental (coeficientes de Fisher) compará-los com os coeficientes de Fisher tabelados na distribuição de Fisher-Snedecor. Através dessa comparação pode-se avaliar se o modelo é significativo ou/e preditivo (equações 5, 6).F experimental = média quadrática ( regressão) / média quadrática (resíduos)(5) Se F experimental > F tabelado → modelo significativo e válido para uso predictivo F experimental = média quadrática ( falta de ajuste) / média quadrática (erro puro)( 6)…”

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Desenvolvimento de um catalisador de ouro e paládio e o impacto da calcinação na oxidação seletiva do álcool benzílico

Guerra

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Aerosol Dose

Cited by 3 publications

References 4 publications

Aerosol Particles Laden with COVID-19 Travel Over 30m Distance

Aerosol Particles Laden with COVID-19 Travel Over 30m Distance

A Theoretical Model of Soil Aerosol Generation and Vertical Transport During Rainfall

Desenvolvimento de um catalisador de ouro e paládio e o impacto da calcinação na oxidação seletiva do álcool benzílico

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