UV effects on bacteria time-lapse 

E. coli can't move on a solid medium. It would take them a very long time to move to the other side as well.

Sci- Inspi Not to mention that not all strains of E. coli are motile. Perhaps you could have used a nonmotile strain.

@@sci-inspi r/woosh

@@davidgamingremastered6784 r/notawooosh

@@davidgamingremastered6784 r/plzcommitapoptosis

It should protect them. If the chemicals in the sunscreen aren't bad for them in the first place.

If the sunscreen is zinc based, they should be fine. If the sunscreen is carbon based, the UV will just heat it up and they’ll either incubate or die trying.

Absolutely brilliant 👏👏👏👏👏👏 Let’s just hope no bacteria’s read this comment or else we’ll have a real problem on our hands.

@@sci-inspi I love how you respond to these questions that were meant to be a joke. Really shows how there are no stupid questions.

'Bacteria' is already plural

That's a good way to demonstrate adaption and evolution! Thank you.

Lol

Yep

That's a good way to create a damn superbug, don't do it!

To create a new super bacteria. No, don't do that.

Larissa Amores umm! maybe because...its E-coli.

@@whendeathdeclareswar7458 Do you know anything about E. coli besides "It makes you very sick"? You are a part of the problem Larissa describes.

@@whendeathdeclareswar7458 how you shit

if he gets e coli on his hand he could just wash it off

Yeah, in school, even when I worked with piranha solution or aqua regia I didn't really wear gloves. The only time we did was for hydrogen fluoride. If I didn't need to wear gloves for aqua regia you probably don't need to wear gloves for E. coli, especially when there's already a shit ton on your skin.

The sun is a deadly laser

Did he just write them on his death note or something?

Low Quality Shitposts not anymore there's a blanket

A bacteria isn't a humanoid, if you are gonna meme do it properly. T_T

I try my best

Wayy underrated

noes noes PÉGATE UN TIRO

SkiLLsZ u beat me to it,

Your profile picture make it better

upvote

Thanks the video is a boon to explain community the effect of time and UV radiation on harmful ecoli found in so many water and food items we consume daily.

Protect yourself against the might of UV light with Flex Seal!

that is a laboratory UV source, more powerful than the battery UV-C wands.

@@mango251 that funny, you know Flexseal really liquid Rubber. UV light eats and destroys elastic polymer Rubber. Rubber enemy is UV light. Don't care if it's vulcanizing like tires they degrade. That why sunscreen like a Rubber protection cream lotion. You are actually protecting the dermis, elastin elastic rubbers band's fibers in our skin, from degradation and wrinkles. Our skin, flesh matter or whatever you call it is similar to a Rubber coverage, over our body's. The pigment melanin a natural sunscreen is natural built-in our DNA. But what most don't understand is, the more skin pigmentation we have the more the skin is tighter lest ability to stretch, the less pigmentation and dna of lighter skin types the more elastin rubber like the skin is. That the way DNA ,dermis etc is , but UV will destroy Flexseal🤣😃😄😄, and Rubber and skin.

And how long you are eating shit?

@@4ipon4ik lmfao

*you are scaring the bacteria! Shush!*

Are you sure that it's peanut butter?

@@4ipon4ik that's a r/whooosh

Today this year it seems more like virus, but you were close my friend!

Wait so that's not normal?

@U hahahahahahahahahhah

i saw u on the Lamborghini video too

Hi Katie, Usually you can count the number of bacterial colonies and compare the different sides. Highly concentrated cultures often leave a "lawn" of bacteria which we can see in the control side. Hope that helps.

ImageJ is also typically used so you can measure the area of patches or lawns of bacteria

You can literally see the living bacteria with the naked eye. Couldn't you see the difference between the sides? And he was just counting how many separate groups (colonies) were remaining. Just the number of colonies and total size (area, because they're on a very flat surface) should be all we care about.... not the actual number of bacterium left over.

I don't think the OP took basic biology class >.>

I am! Remember to wash hands 👍

I am! I am looking to build a box to decontaminate packages before they go into the house without destroying it

SURVIVAL OUTPOST CHANNEL how do you figure? UVC rays do not pass through the ozone layer.

Seriously, can this kill viruses like covid-19 ??.

John Olson it does work, but it also kills everything else. Using UV light to treat Covid in a person makes about as much sense as boiling them to sterilize them.

Plastic wrap would block the UV rays. An alternative would be a agar or clear overlay with sunscreen and see if that works.

This is what I was also wondering. Ozone is heavier than air so it will fall down onto the uncovered side of the petri dish. Perhaps they could seal the dishes and remove all oxygen.

one 5-milliliter 24 hour old broth culture of E. coli should be plenty.

Thank you!

I am not sure, but I think it would. I think bringing it closer would make it more intense I assume.

@@sci-inspi I'm not a biologist so idk if increasing light intensity would decrease disinfection time. But, I do know that uv follows the inverse square law so the light should be far more intense the closer it is.

@@Dysfunctionality15 I think it's also depend on UV wavelength, from all I know, 260-270 nm is the best to kill E.Coli. The lower is, the less effective. I'm not sure what happend if UV wavelength is higher.

FightingMario54321 nope

I'll add it to my list of future videos.

@@sci-inspi Thanks

UVC is the highest energy and therefore more likely to form thymine dimers, making it most lethal.

A bunch of them would pass through, UV is pretty readily absorbed due to their respective photon energy levels.

Let me check and see if I can get my hands on some Ozone.

great!! can't wait.. thanks

Not all the bacteria, but some will die.

These lights are UV-C which cannot penetrate or atmosphere.

doubt it. Since it's destroyed at the DNA level

Jeannette K i believe any regular uv light will work but you can always buy some off of amazon good luck:)

it s not good to use UV light to kill bacteria in closed area like your toilet, because Uv light reacts with Oxigen O2 in the air to form ozone O3, which is toxic!

i recieved a light in the mail with no instruction it is led and it is blue it showed how what surfices needed to be cleaned I think it is a black light. Is there such thing as a led uvc light?

+Hung Tr Ozone has no smell, this thing we are feeling is nitrous oxide and this is real threat. Because ozone is hyperactive then easy oxidate nitrogen.

Those with the strongest immune systems grew up playing in the dirt, those with the weakest immune systems grew up wrapped in cotton wool.

That wouldn't be a good idea. UV light causes sunburn. And prolonged exposure of UV after years can cause skin cancer.

UV - C are lethal

It's great for psoriasis though because it kills all the cells that are rapidly regenerating.

@@sci-inspi if im correct, it also does give a thing called arc eye or welders eye or something? witch tends to be quite painfull.

Nope, never.

@Dušan Xmetov And that's exactly how radiotherapy works! Except it uses x-rays instead of UV radiation. (The former is more energetic)

UV kills every cell, high UV exposition is bad for your body.

Garlic Bread that’s kinda the whole joke

@@Sir_Budginton Yeah, since UV is literally the cause of skin cancer. Don't know how garlic didn't get it. :l

is one minute too much for the skin?-how much is too much exposure?

UVC

thanks

Hi EOS, I don't know the dose but I could give you information about the conditions and maybe we can calculate it?

And bleach. That should be interesting.

Cov-sars-2 isn't "hard to kill", just use soap or any disinfectant. The problem is, it *spreads* really easily.

@@NigelTolley Billetes, mascarillas, verduras talvez

No he grabbed a test tube. The E. coli is inside the test tube

I bought it from scientific suppliers.

its ecoli not ebola lmao

37 degrees Celsius

Thank you. I was researching this on science buddies and they said 37 degrees Celsius but I wasn't sure and so I asked you what you did.

You're welcome Harish.

I am not sure. I used a lamp that had two 15 watt bulbs for this video. My guess would be the 3 Watt lamp would require more time to kill the bacteria. If you have access to a microbiology lab, you may be able to test the 3 watt lamp it.

what if you got a 5 gal of bucket of yeast and water that would take forever?

Sci- Inspi which wavlength in nanometers was the lamp you used?

The wavelength was 254 nanometers

Yes the wavelength is 254 nanometers. Sorry for the late reply, I never got a notification for this comment.

6 likes only lmao

Eh, the bacteria used in a lot of labs are non pathogenic, and if you use proper sterilization, handling, and clean up techniques it’s fine. You can use gloves for extra protection though (I generally do because I’m clumsy sometimes)

ive literally ate E.Coli its fine