Name: マスク対ノーマスクラボの結果 - 彼らは機能していますか？ (Mask vs No Mask Lab Results - Do they work?)
Uploaded: 2021-01-14T11:19:38.000Z
Duration: 10 min 53 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

基礎受動態

- This episode is sponsored by Skillshare.

I saw these images circulating around the internet that

showed bacterial cultures growing in Petri dishes

and claiming to represent the effectiveness of masks

in stopping or minimizing the spread of germs.

It was in relation to COVID-19 and whether or not

So today we're gonna recreate this experiment and

document it to see how accurate it was and whether or not

- Now we trace the images back to the Twitter user,

Dr. Rich Davis, love that very expensive name,

but we want to reproduce his demonstration on our own

One, because it's an excuse to do some fun at home science,

and maybe we'll have some new friends in quarantine,

Two we wanna see if our results will be consistent.

- Three, we really wanna test homemade masks

because the ones in the pictures look like surgical mask,

but I feel like a lot of people just made their own at home,

like these ones, my mom made that are super cool.

She just basically put two layers of cotton fabric together

I feel like a science superhero walking down the street.

I know some of you might be screaming at your screen saying,

but Mitch Coronavirus is a virus, not a bacteria.

so let us explain why this experiment is still relevant.

- Right now scientists believe that the main mechanism

it relies on moisture from an infected person to trap.

And given that bacteria from the mouth, nose and throat

travel in the same way, while these dishes aren't gonna

show us how much SARS CoV-2 virus is on them,

it will show us the relative amount of droplets.

And these droplets by proxy are telling us how our germs

spread, whether we're wearing a mask or not wearing a mask.

- As an added bonus, I actually got some friends

who work in a lab at the University of Toronto,

who are also going to recreate this experiment

with us at the same time, but under even more ideal

Ultimately, all this is to test and figure out

Okay, so we are here with our agar plates,

I've got gloves on, these have been sterilized,

we actually got them from our friend, Amanda

who works in a lab who was able to prep these

in a proper autoclave, and we've sterilized this countertop

and we're trying to be super careful because we only wanna

see what's actually coming out of my mouth.

Basically it means that the agar that's in them

There's other kinds that help fungus thrive,

but in this case, we wanna see the bacteria come up

cause that's mostly what's gonna come out of my mouth.

- [Narrator] Once we had all the plates ready to go,

We held each plate around 1.5 feet away from the face

a fake sneeze had to suffice, talked for one minute to one.

- There's hydrogen and helium then lithium, beryllium.

♪ There's hydrogen and helium then lithium, beryllium. ♪

- Finally, we then repeated all of these activities

All the bacteria, eats up all that agar goodness and grows,

and then we'll just come back and check on them soon.

- Now because we don't have an incubator in our home,

obviously, our samples will grow pretty slowly,

so I enlisted the help of some friends who work at the

Molecular Genetics Department at the University of Toronto

who are going to duplicate this experiment

so they're gonna walk me through the important

- At the lab, we've used Brucella Blood Agar plates.

Brucella is a type of media and it's supplemented

字幕リスト動画再生

マスク対ノーマスクラボの結果 - 彼らは機能していますか？ (Mask vs No Mask Lab Results - Do they work?)

absolutely

thrive

experiment

necessarily