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Plasma Device Kills Bacteria On Skin In Seconds

Ponca City, We love you writes "In medicine, plasma, the fourth state of matter, is already used for sterilizing surgical instruments; plasma works at the atomic level and is able to reach all surfaces, even the interior of hollow needle ends. Now the BBC reports that researchers at the Max Planck Institute for Extraterrestrial Physics have demonstrated a plasma device that can rid hands, feet, or even underarms of bacteria, including the hospital superbug MRSA, by creating cold atmospheric plasma that produces a cocktail of chemicals that kills bacteria but is harmless to skin. 'The plasma produces a series of over 200 chemical reactions that involve the oxygen and nitrogen in air plus water vapor — there is a whole concoction of chemical species that can be lethal to bacteria,' says Gregor Morfill. 'It's actually similar to what our own immune system does.' The team says that an exposure to the plasma of only about 12 seconds reduces the incidence of bacteria, viruses, and fungi on hands by a factor of a million — a number that stands in sharp contrast to the several minutes hospital staff can take to wash using traditional soap and water. Morfill says that the approach can be used to kill the bacteria that lead to everything from gum disease to body odor and that the prototype is scalable to any size and can be produced in any shape."

12 of 237 comments (clear)

  1. Excessive cleanliness by the_one(2) · · Score: 4, Insightful

    Do you remember the article on /. about how excessive cleanliness isn't all that good for you? Yeah...

    1. Re:Excessive cleanliness by spidercoz · · Score: 4, Funny

      would that be next to excessive godliness? that doesn't sound too good either. I dated a girl in high school that had excessive godliness

      --
      "I disapprove of what you say, but I will defend to the death your right to say it." - Evelyn Beatrice Hall, re Voltaire
    2. Re:Excessive cleanliness by Chyeld · · Score: 4, Insightful

      Don't know about you kid, but a doc sticking his hand into my insides is one of those situations where I'm willing to forego the 'benefit' of having my immune system stimulated by germs being introduced in the process and ask him to wash up.

    3. Re:Excessive cleanliness by Sycraft-fu · · Score: 5, Insightful

      Do you remember that not everything applies to every situation? Because it doesn't.

      The article about excessive cleanliness was relating to raising children. Basically, our immune systems are like most things in us in that they need to be used to develop. As such children need to get sick to have a well functioning immune system as adults. You don't want to keep them in a sterile environment or they'll never develop defenses.

      However this is for hospitals. There you do want things as clean as possible. You have people who are in weakened states, their ability to fight off disease is less than normal. Also, you are bypassing a lot of their defenses in many cases. Your body is much more difficult to infect via the nose and mouth than directly via an open incision in your chest. As such, maximal clean is desirable.

      This is not an all or nothing thing. Being super clean is not always good or always bad, it depends on the situation. You wouldn't want to buy this for home and turn your house in to a sterile cleanroom from which you never let your kid out. They'd have no immune system and be very vulnerable in the world. However you do want this for hospitals to ensure that wounded and sick people aren't made further sick by an infection that they can't fight in a weakened state.

    4. Re:Excessive cleanliness by Nathrael · · Score: 5, Funny

      I dated a girl in high school that had excessive godliness

      Considering you are posting on Slashdot...was her surname .png?

      --
      A good education is a bit like a STD - it makes you unsuitable for a lot of jobs and gives you a desire to spread it.
  2. Re:Good bacteria? by Cedric+Tsui · · Score: 5, Funny

    The same thing that happens to them when you wash with antibacterial soap.

  3. Re:Resistance? by geekoid · · Score: 4, Insightful

    Never. There is a difference between removing the easy bugs, and complete annihilation of all bacteria it come into contact with. Its like saying the if we had enough super novas humans would become resistant to them.

    --
    The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
  4. Re:Resistance? by Chyeld · · Score: 5, Informative

    In order to grow resistance, you have to leave a few alive and they have to have been left alive due in some part to something in their makeup causing them to be less vulnerable to the 'weapon'.

    In other words, something that lived only because it was never touched isn't going to evolve into the superbug.

    This eradicates the germs, they aren't being poisoned or having their chemical processes blocked (which is what most antibiotics do), it's ripping the germs apart at the atomic level. You don't develop a resistance to that.

  5. Re:Okay, I know this is off-topic... by sakdoctor · · Score: 5, Funny

    That's just coincidental. Besides there were FIVE elements; Fire, water, earth, air and orange haired Ukrainian chick.

  6. Re:Surface only, though? by Dunbal · · Score: 4, Interesting

    If it's germ free and not large enough to be visible, does it matter?

          It does if you're a surgeon. There's something called the foreign body response, and we've seen it happen even with particles of the STERILE talc they line some surgical gloves with to make them easier to put on. Problems aren't only caused by bacteria. Depending on the person's immune response, virtually anything can cause a life-threatening reaction to normally "inert" things like nylon suture or titanium rods/sutures. Things like dirt and human hair are more likely to provoke a reaction.

    --
    Seven puppies were harmed during the making of this post.
  7. Re:Okay, I know this is off-topic... by BarryJacobsen · · Score: 4, Informative

    That's just coincidental. Besides there were FIVE elements; Fire, water, earth, air and orange haired Ukrainian chick.

    Everyone knows that the fifth element is Heart and is represented by a South American with a monkey. Source

  8. Re:Okay, I know this is off-topic... by MadUndergrad · · Score: 4, Funny

    Ninety seconds? Look at who thinks he's a bigshot, Mr. "I'm not a minute-man anymore". Now to click "post anonymously" to protect myself from embarrassment.