We have enough air purifiers to filter the air in the house six times an hour. It reminds me of the days when I had bitcoin miners running. The noise is like being in an airplane all the time. I rather like fan noise though. I could sleep in a machine room.
Marcus ________________________________ From: Friam <friam-boun...@redfish.com> on behalf of glen <geprope...@gmail.com> Sent: Wednesday, January 12, 2022 9:25 AM To: friam@redfish.com <friam@redfish.com> Subject: [FRIAM] preprint aerosol covid The Dynamics of SARS-CoV-2 Infectivity with Changes in Aerosol Microenvironment https://www.medrxiv.org/content/10.1101/2022.01.08.22268944v1 > Understanding the factors that influence the airborne survival of viruses > such as SARS-CoV-2 in aerosols is important for identifying routes of > transmission and the value of various mitigation strategies for preventing > transmission. We present measurements of the stability of SARS-CoV-2 in > aerosol droplets (∼5-10µm equilibrated radius) over timescales spanning from > 5 seconds to 20 minutes using a novel instrument to probe survival in a small > population of droplets (typically 5-10) containing ∼1 virus/droplet. > Measurements of airborne infectivity change are coupled with a detailed > physicochemical analysis of the airborne droplets containing the virus. A > decrease in infectivity to ∼10 % of the starting value was observable for > SARS-CoV-2 over 20 minutes, with a large proportion of the loss occurring > within the first 5 minutes after aerosolisation. The initial rate of > infectivity loss was found to correlate with physical transformation of the > equilibrating droplet; salts within the droplets crystallise at RHs below 50% > leading to a near instant loss of infectivity in 50–60% of the virus. > However, at 90% RH the droplet remains homogenous and aqueous, and the viral > stability is sustained for the first 2 minutes, beyond which it decays to > only 10% remaining infectious after 10 minutes. The loss of infectivity at > high RH is consistent with an elevation in the pH of the droplets, caused by > volatilisation of CO2 from bicarbonate buffer within the droplet. Three > different variants of SARS-CoV-2 were compared and found to have a similar > degree of airborne stability at both high and low RH. -- glen Theorem 3. There exists a double master function. .-- .- -. - / .- -.-. - .. --- -. ..--.. / -.-. --- -. .--- ..- --. .- - . FRIAM Applied Complexity Group listserv Zoom Fridays 9:30a-12p Mtn UTC-6 bit.ly/virtualfriam un/subscribe http://redfish.com/mailman/listinfo/friam_redfish.com FRIAM-COMIC http://friam-comic.blogspot.com/ archives: 5/2017 thru present https://redfish.com/pipermail/friam_redfish.com/ 1/2003 thru 6/2021 http://friam.383.s1.nabble.com/
.-- .- -. - / .- -.-. - .. --- -. ..--.. / -.-. --- -. .--- ..- --. .- - . FRIAM Applied Complexity Group listserv Zoom Fridays 9:30a-12p Mtn UTC-6 bit.ly/virtualfriam un/subscribe http://redfish.com/mailman/listinfo/friam_redfish.com FRIAM-COMIC http://friam-comic.blogspot.com/ archives: 5/2017 thru present https://redfish.com/pipermail/friam_redfish.com/ 1/2003 thru 6/2021 http://friam.383.s1.nabble.com/
