Science experiment

DieHardBrownsFan

If you're going to fuck someone, make sure you wear an n95 mask.

Canton Dawg

Kind of like why a pair of jeans can’t contain a fart.

tiamat63

All that science, yet you're still rocking windows XP it looks like?

edit: Anybody else read the thread title in Doc Brown's voice?

htownbrown

@tiamat63 said:

All that science, yet you're still rocking windows XP it looks like?

edit: Anybody else read the thread title in Doc Brown's voice?

Its a 1987 jsm-820.

The newer scopes are occupied.

MLD Woody

@canton-dawg said:

Kind of like why a pair of jeans can’t contain a fart.

This should be a joke sarcastically poking fun at people that actually believe this

But I'm guessing it a statement of support ...

htownbrown

@mld-woody said:

This should be a joke sarcastically poking fun at people that actually believe this

But I'm guessing it a statement of support ...

So what don't you like? The pictures, the chart, or the bottom line?

Axe

@htownbrown said:

So what don't you like? The pictures, the chart, or the bottom line?

It doesn't advance the liberal narrative.

calfoxwc

https://www.usatoday.com/story/news/factcheck/2020/06/11/fact-check-n-95-filters-not-too-large-stop-covid-19-particles/5343537002/

The science of mask functionality gets really small, really fast. The unit of measurement here is microns — 1/1000th of a millimeter.

The size-based argument against N95 laid out in this claim assumes mask filtering works something like water flowing through a net — particles in the water smaller than the net opening pass through, while larger items don’t.

But the physics involved don’t work like that at all.

The COVID-19 particle is indeed around 0.1 microns in size, but it is always bonded to something larger.

“There is never a naked virus floating in the air or released by people,” said Linsey Marr, a professor of civil and environmental engineering at Virginia Tech who specializes in airborne transmission of viruses.

The virus attaches to water droplets or aerosols (i.e. really small droplets) that are generated by breathing, talking, coughing, etc. These consist of water, mucus protein and other biological material and are all larger than 1 micron.

“Breathing and talking generate particles around 1 micron in size, which will be collected by N95 respirator filters with very high efficiency,” said Lisa Brosseau, a retired professor of environmental and occupational health sciences who spent her career researching respiratory protection.

tiamat63

Never thought Cal would be the one that linked you medical science you failed to consider.

As the kids say "weird flex, but ok".

htownbrown

@tiamat63 said:

Never thought Cal would be the one that linked you medical science you failed to consider.

As the kids say "weird flex, but ok".

It's not a n95 mask that I scoped. Its what the average person wears, which is a run of the mill surgical mask. I also never said anything about a "naked" virus.

htownbrown

I'd also like to add PM 2.5 can fly across oceans. Meaning it can stay suspended in a room for the entirety of its "lifespan" if its not well ventilated.

calfoxwc

Back in my AF days , I was thinking of being a physician's assistant, took biology classes, even genetics, etc. Til a physician's assistant explained that it was a great idea if I was going to make the AF a career, but a bad choice in civilian life etc etc.

She was right. My other idea was biomedical engineer - I wanted to do R&D in advanced prostheses.

way too much advanced math.

calfoxwc

@htownbrown said:

I'd also like to add PM 2.5 can fly across oceans. Meaning it can stay suspended in a room for the entirety of its "lifespan" if its not well ventilated.

maybe in one of these:

Oh, I'm just being funny. sorry.

htownbrown

"N95 respirators made by different companies were found to have different filtration efficiencies for the most penetrating particle size (0.1 to 0.3 micron), but all were at least 95% efficient at that size for NaCl particles."

I didn't see any....but maybe someone can point me to the .3 micron pores in the pictures I posted???

jbluhm86

@htownbrown said:

I had some time today.....

Outer mask fabric....

Inner mask fabric....

Bottom line:

This shit isn't going to flatten the curve...

@htownbrown said:

So what don't you like? The pictures, the chart, or the bottom line?

Your methodology is a bit flawed.

I did a deep dive on mask pore size on this thread a few weeks ago, but I'll repost here:

"You are correct about the average size of typical viruses. However, viruses do not exist in a vacuum; on their own, they cannot travel very far, and can be quite vulnerable to outside influences, such as temperature, relative humidity of the air and UV light from the sun. As such, viruses need a transmission vector in order to spread. In most cases, that is usually droplets coming from sneezing or coughing. Those droplets are much bigger than the viruses they carry; usually around 0.6-1000 micrometers (um)."

htownbrown

@jbluhm86 said:

Your methodology is a bit flawed.

I did a deep dive on mask pore size on this thread a few weeks ago, but I'll repost here:

"You are correct about the average size of typical viruses. However, viruses do not exist in a vacuum; on their own, they cannot travel very far, and can be quite vulnerable to outside influences, such as temperature, relative humidity of the air and UV light from the sun. As such, viruses need a transmission vector in order to spread. In most cases, that is usually droplets coming from sneezing or coughing. Those droplets are much bigger than the viruses they carry; usually around 0.6-1000 micrometers (um)."

I'm aware

MLD Woody

Can you source your graph? I don't doubt the data I just want more context.

htownbrown

@mld-woody said:

Can you source your graph? I don't doubt the data I just want more context.

https://pubmed.ncbi.nlm.nih.gov/22651099/

jbluhm86

@htownbrown said:

I'm aware

I believe there's enough of the proverbial fertile ground here for the both of us to be correct. Are regular surgical masks, if properly utilized, beneficial in the prevention of the spread of influenza? Yes and no.

Yes, because the mask pore size is small enough to sufficiently stop a majority of aerosolized sneeze and cough droplets from going into the local atmosphere; at worst, they slow down particles enough so that they don't travel nearly as far as they would have if unobstructed. To your point, there are also particle sizes small enough to make it through.

What these masks are most efficient at is stopping enough of the aerosol particles from escaping or traveling far, thereby reducing the potential viral load someone in close proximity would be exposed to. Bio-load is a critical factor in whether or not someone gets ill, because the typical healthy human immune system is more effective at fighting off lower viral loads.

Westside Steve

@diehardbrownsfan said:

If your going to fuck someone, make sure you wear an n95 mask.

Actually if you using the procedure that some of our members might possibly prefer there's less chance of breathing on each others face. Just saying.

WSS