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#aerosol

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Jens :verified:

Es gibt Fälle von #Hasenpest #Tularämie in Deutschland. Haushunde scheinen resistent. Problem ist, dass Erreger durch direkten Hautkontakt mit dem Hund auf den Menschen übertragen werden können. #zoonose

Möglicher Infektionsweg ist auch das Einatmen von kontaminiertem #Staub oder #Aerosol|en.

Erkrankung beim Menschen ist schwer, häufig lebensbedrohlich.

#hunde #dogs #hundeliebe #doglovers #dogsofmastodon

Hier mal der Link zum Wiki, aber ich würde hasenpest googeln.

de.wikipedia.org/wiki/Tular%C3

de.wikipedia.orgTularämie – Wikipedia
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HistoPol (#HP) 🏴 🇺🇸 🏴

#Luftfilter in #Schulen und bei der #Kinderbetreuung

(5/n)

... Infekte.
Im Übrigen sind wir uns alle im Klaren, dass die Pandemien durch die #Klimaerwärmung häufiger werden. #Luftfilter am Arbeitsplatz und in Kinderbetreuungseinrichtungen sind somit auch eine wesentlicher Investition in den #Infektionsschutz von #aerosol|basierten #Infektionskrankheiten.

Bei den Kosten für..

@stubenhocker @fedieltern @2ndStar @fritzoids @crazy2bike

Pubblico
RTN

#RepublicWorld:
"
Starlinks are Falling: 120 Satellites Crash from Space in January 2025
"
".. raise concerns about atmospheric pollution. .. disintegration of sats releases metallic vapours, including aluminium oxide, which can deplete the ozone layer. A 2023 study found that 10% of aerosols collected 60,000 feet above Alaska contained aluminium + other metals from sat burn-up"

republicworld.com/science/star

6.2.2025

Republic World · Starlinks are Falling: 120 Satellites Crash from Space in January 2025Starlink, a satellite network developed by SpaceX, aims to provide low-cost internet access to remote locations. The surge in crashing satellites is primarily due to the mass retirement of the first-generation (Gen1) Starlink satellites, read more.
#aerosol#aluminium#pollution
Pubblico
Chao-c'

home.cern/news/press-release/p
Isoprene emitted by tropical forests may provide a globally important source of aerosol particles that influence clouds, according to a new study by the CLOUD collaboration at CERN

CERNCLOUD experiment resolves puzzle of new aerosol particles in upper troposphereIn a paper published today in the journal Nature, the CLOUD collaboration at CERN reveals a new source of atmospheric aerosol particles that could help scientists to refine climate models.  Aerosols are microscopic particles suspended in the atmosphere that arise from both natural sources and human activities. They play an important role in Earth’s climate system because they seed clouds and influence their reflectivity and coverage. Most aerosols arise from the spontaneous condensation of molecules that are present in the atmosphere only in minute concentrations. However, the vapours responsible for their formation are not well understood, particularly in the remote upper troposphere. The CLOUD (Cosmics Leaving Outdoor Droplets) experiment at CERN is designed to investigate the formation and growth of atmospheric aerosol particles in a controlled laboratory environment. CLOUD comprises a 26 m3 ultra-clean chamber and a suite of advanced instruments that continuously analyse its contents. The chamber contains a precisely selected mixture of gases under atmospheric conditions, into which beams of charged pions are fired from CERN’s Proton Synchrotron to mimic the influence of galactic cosmic rays.  “High concentrations of aerosol particles have been observed high over the Amazon rainforest for the past twenty years, but their source has remained a puzzle until now,” says CLOUD spokesperson Jasper Kirkby. “Our latest study shows that the source is isoprene emitted by the rainforest and lofted in deep convective clouds to high altitudes, where it is oxidised to form highly condensable vapours. Isoprene represents a vast source of biogenic particles in both the present-day and pre-industrial atmospheres that is currently missing in atmospheric chemistry and climate models.” Isoprene is a hydrocarbon containing five carbon atoms and eight hydrogen atoms. It is emitted by broad-leaved trees and other vegetation and is the most abundant non-methane hydrocarbon released into the atmosphere. Until now, isoprene’s ability to form new particles has been considered negligible. The CLOUD results change this picture. By studying the reaction of hydroxyl radicals with isoprene at upper tropospheric temperatures of −30 °C and −50 °C, the collaboration discovered that isoprene oxidation products form copious particles at ambient isoprene concentrations. This new source of aerosol particles does not require any additional vapours. However, when minute concentrations of sulphuric acid or iodine oxoacids were introduced into the CLOUD chamber, a 100-fold increase in the aerosol formation rate was observed. Although sulphuric acid derives mainly from anthropogenic sulphur dioxide emissions, the acid concentrations used in CLOUD can also arise from natural sources. In addition, the team found that isoprene oxidation products drive rapid growth of particles to sizes at which they can seed clouds and influence the climate – a behaviour that persists in the presence of nitrogen oxides produced by lightning at upper-tropospheric concentrations. After continued growth and descent to lower altitudes, these particles may provide a globally important source for seeding shallow continental and marine clouds, which influence Earth’s radiative balance (the amount of incoming solar radiation compared to outgoing longwave radiation). “This new source of biogenic particles in the upper troposphere may impact estimates of Earth's climate sensitivity, since it implies that more aerosol particles were produced in the pristine pre-industrial atmosphere than previously thought,” adds Kirkby. “However, until our findings have been evaluated in global climate models, it’s not possible to quantify the effect.” The CLOUD findings are consistent with aircraft observations over the Amazon, as reported in an accompanying paper in the same issue of Nature. Together, the two papers provide a compelling picture of the importance of isoprene-driven aerosol formation and its relevance for the atmosphere.  Since it began operation in 2009, the CLOUD experiment has unearthed several mechanisms by which aerosol particles form and grow in different regions of Earth’s atmosphere. “In addition to helping climate researchers to understand the critical role of aerosols in Earth’s climate, the new CLOUD result demonstrates the rich diversity of CERN’s scientific programme and the power of accelerator-based science to address societal challenges,” says CERN Director for Research and Computing, Joachim Mnich. Isoprene from forests is efficiently transported at night by deep convective clouds into the upper troposphere. During daylight, the isoprene that has accumulated overnight, together with daytime-convected isoprene, reacts with hydroxyl radicals and NOx from lightning to produce oxygenated isoprene organic molecules. These combine with trace amounts of acids to produce high particle concentrations at temperatures below −30 °C. The newly formed particles grow rapidly over several hours and days while following the descending air masses. This mechanism may provide an extensive source of cloud condensation nuclei for shallow continental and marine clouds, which influence Earth’s radiative balance. Further material: Infographic Photo collection Video collection
#cern#climate#aerosol
Pubblico
Giuseppe Michieli

#Influenza virus #infection and #aerosol #shedding kinetics in a controlled #human infection #model

Source: Journal of Virology, ABSTRACTEstablishing effective mitigation strategies to reduce the spread of influenza virus requires an improved understanding of the mechanisms of transmission. We evaluated the use of a controlled human infection model using an H3N2 seasonal influenza virus to study critical aspects of transmission, including symptom progression and the…

etidioh.wordpress.com/2024/11/

ETIDIoH · #Influenza virus #infection and #aerosol #shedding kinetics in a controlled #human infection #model
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Pubblico
⋆★⋆Ali⋆★⋆

The teen in BC, Canada 🇨🇦 with #H5N1 is in critical condition 💔 They haven't identified a source of transmission & may not be able to. The child doesn't live on a farm and there was no obvious contact with wild birds or poultry. This teen is in the area I'm from and I could not have less faith in our provincial health officer #bonniehenry I have heard that they are not taking #airborne precautions for teen in the BC children's hospital, rather downgrading to droplets (surgical masks)😞 #aerosol

Pubblico
Giuseppe Michieli

#Air – #Liquid #Interface #Model for #Influenza #Aerosol #Exposure In Vitro

Source: BioRxIV, AbstractAirborne transmission is an essential mode of infection and spread of influenza viruses among humans. However, most studies use liquid inoculum for virus infection. To better replicate natural airborne infections in vitro, we generated a calm-aerosol settling chamber system designed to examine the aerosol infectivity of influenza viruses in different cell types. Aerosol…

etidioh.wordpress.com/2024/11/

ETIDIoH · #Air – #Liquid #Interface #Model for #Influenza #Aerosol #Exposure In Vitro
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