Placeholder Image

字幕表 動画を再生する

  • Hand sanitizers are really handy. Especially when soap and running water aren't within reach

  • But are they worth using more often, or should you try and avoid them all together?

  • Hand sanitizers contain ingredients like alcohol,

  • which is often at 70% concentration,

  • that works to kill Microbes.

  • When left on the skin [for] 30 seconds or longer, it's able to kill 99.9%

  • of Bacteria present and

  • even certain types of viruses like influenza [a]

  • The sanitizer breaks open the cell membranes of these bacteria or the...

  • envelopes of viruses, although they're ineffective against spore releasing Bacteria and viruses without envelopes.

  • There are also non-alcohol based

  • sanitizers using other ingredients,

  • but depending on their combination may just be bacteriostatic

  • Meaning they prevent bacterial reproduction.

  • Of course anyone who's used Sanitizer knows that it simply spreads grime and dirt around so soap and water are necessary in these cases

  • to clean up, but in the absence of visible dirt which works better.

  • A 2009 Australian study had vaccinated hospital workers contaminate their hands with live

  • Influenza [a] virus and had some of them wash their hands with regular soap and water for 40 seconds

  • followed by paper towel drying while some of their hands with

  • 61.5% ethanol sanitizer for 20 seconds and others used a combination of alcohol and

  • Antibacterials the remaining group was the control and did nothing as expected the control group had the most viral dna present

  • But the group with the least viral Dna was the soap and water group

  • despite the fact that

  • Sanitizer can destroy germs soap and water actually removes them from the hands and comes out as the superior method of infection [control]

  • but does the temperature of the water matter turns out that while hot water can kill Bacteria this only happens at

  • 99.9 8 degrees Celsius which would burn your skin so save some [energy] and wash with cold water of course soap can also be

  • Antibacterial and these often contain Triclosan [so] is that even more effective?

  • Well it turns out that

  • they're typically way below the effective [1%] concentration required to cause bacterial side effects and

  • Studies from around the world have shown these soaps to be no better than regular soap

  • Furthermore Triclosan is washed down the drain and ends up in lakes and Rivers in fact

  • It's one of the top ten contaminates found in all American Rivers bio accumulating in many Marine organisms like dolphins

  • even more troubling is that Triclosan has been linked to promoting antibiotic resistance in Bacteria in a process called cross resistance as

  • Bacteria become resistant to Triclosan they simultaneously

  • evolved to resist the effects of other antibiotics

  • even though they haven't been exposed to them well this doesn't mean using antibacterial Soap will render your antibiotics ineffective the study highlights the

  • possibility of unnecessary

  • Antibacterial usage potentially leading to Superbugs of course a common misconception

  • Is that hand sanitizer causes bacterial resistance as well which in most cases?

  • It doesn't as they primarily use alcohol as their active ingredients

  • But some brands of hand sanitizer [do] include antibacterial ingredients like Triclosan

  • So it's important to be aware at the end of the day your best bet is always using regular soap and washing with cold water

  • Saving Sanitizer for sinkless situations and avoiding antibacterial soaps for the sake of your health, the environment, and future generations

  • But is it truly better to be clean in the first place?

  • We debate between being clean or dirty in our new AsapThought video (Greg and Mitch) that you can click here and look at the hygiene

  • hypothesis

  • And other studies to figure out the best way to live [your] life from a sanitary perspective.

  • don't forget to subscribe for more weekly science videos every Thursday. We'll see you next week. Greg insta: @Whalewatchmeplz Mitch insta: MitchellMoffitt

Hand sanitizers are really handy. Especially when soap and running water aren't within reach


ワンタップで英和辞典検索 単語をクリックすると、意味が表示されます

B1 中級

手の消毒剤は実際にあなたのために悪いですか? (Is Hand Sanitizer Actually Bad For You?)

  • 19 3
    Yukiko に公開 2021 年 01 月 14 日