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Nanotech Paint To Kill Bacteria
ColGraff points out reporting at Science News about the possibility of killing bacteria with paint. Scientists in the UK have found that high concentrations of titanium oxide nanoparticles in paint can kill bacteria by creating hydroxyl radicals when exposed to ordinary fluorescent light. Titanium dioxide is present in most white paint at concentrations of 30% or so, but not always at nanoparticle scale. The researchers found that an 80% concentration of TiO2 nanoparticles worked well to kill E. Coli bacteria. There is hope that the technique could be used against "superbugs," which are resistant to multiple antibiotics. A researcher not associated with the UK team pointed out the problem with developing products based on this idea: "[A]nything that survives and sticks around grows greater resistance... ultimately [antibiotic paint] will be its own worst enemy and the bacteria could grow to be even stronger."
What a crazy thing to say. It's true, for sure, but has always been the case in the arms race against bacteria. It's what natural selection does...
What could possibly be the researcher's motivation to say such a strange thing?
*cough*She's the founder of a rival nanotech firm*cough*
A coincidence, or fear mongering unscientific FUD? You decide!
"Be light, stinging, insolent and melancholy"
Lets give people lead in small dosages from age of a baby to 18.
Whoever we dont kill will make the rest of them immune.
Or shall we say that boric acid with cockroaches will make boric acid resistant cockroaches? I think not.
Some things in biology are terminal, regardless of dose
So you can use this new nano-titanium paint with a UV light and kill bacteria within 96 hours... or you can use the nano-silver paint to kill them with no light needed in 2 hours. And it's been around for around 4 years.
The problem here is British, a historical lack of hygiene.
The paint proposed could be a solution but I doubt whether they'll ever be able to recuperate the investments by lack of an export market...
Another issue is that by now it's known nano particles are potentially in the same league as Asbestos fibres and spreading them on large surfaces might introduces other problems.
"The likes of Facebook and WhatsApp are free to those whose privacy is of zero value."
I realize that we face a pretty tough battle with certain "superbugs", but wouldn't one expect that as these bacteria adapt immunity to current antibiotics that they'll open up a weakness to something else? I suppose it's _possible_ that they're evolving to be stronger in a general sense, but usually I think of evolution as becoming more fit for one's environment -- which usually makes one less fit for another environment. Engineering is all about tradeoffs -- whether via intelligent design (our designs) or evolution (natures "design"). We created a new environment for them by introducing antibiotics, which they've adapted to. So we'll change the environment again.
I understand this is not simple or straightforward, but I think the idea of "superbugs" is a bit of misnomer -- they're only super until we find the next weakness, and I imagine they'll always be one, even if it takes us a while to find it.
Cheers.
No bacteria will ever be able to adapt to BLEACH. Bleach remains the tried and true no-escape bacteria killer.
Mod Me Up. You'll make a grown man cry.
The reason antibiotic resistance develops is because antibiotics are highly targeted to a certain bacterial mechanism, usually one enzyme or protein, or a complex of enzymes working together. For obvious reasons, these have to be enzymatic mechanisms and proteins unique to bacteria, and not found in humans, primates, mammals, etc.
On the other hand, chlorine kills everything, regardless of details of underlying biology. Presumably, this paint would do the same, unless they evolve some complex way of dealing with titanium dioxide, which is highly unlikely IMHO.
Who can say for sure what will happen? This brings to mind what happened to a strain of E. Coli. They were experimenting on a streptomycin resistant strain and they noticed something strange. Some colonies actually needed streptomycin to live! Evolution can do some really strange and unpredictable things.
So we get bacteria who adapt to live in conditions that are totally unlike the conditions inside a human body.
It's really not a matter of what "conditions inside the human body" are like. Conditions inside the human body don't normally include the presence of vast amounts of amoxicillin, for example. And yet, when you have a bacterial infection, taking amoxicillin tablets will get rid of them for you.
Bacteria that aren't "adapted to the conditions inside the human body" aren't a threat to begin with, so they're irrelevant. The problem with antibiotic resistance is that, if you wipe out 99% of bacteria, leaving only the 1% that are resistant to that antibiotic, when those multiply to fill the space left by the ones you killed, you have as many bacteria as you started with, but now your antibiotic is useless.
Not that the arguments in TFA make much sense, mind you, but saying that bacterial resistance is only an issue if they're "adapting to conditions inside the human body" is missing the point. Normal conditions inside the human body don't include antibiotic drugs.
... no bacterium is resistant to chlorine, and we don't worry about it happening... ...chlorine kills everything, regardless of details of underlying biology...
Uh, dude, I consume a fair quantity of chlorine every day, and not only do I survive this, but the bacteria in my gut do also.
And, I've seen living organisms flourish in chlorinated swimming pools. Everything from bacteria to dytiscidae to amphibians to human children.
And finally, my spouse has been a water quality research scientist for 20 years, and I assure you that organisms evolving various types of resistance to chlorine is something they worry about.
Not only that but there is some evidence that children need some exposure to germs for their immune system to develop properly. Without this exposure their immune systems start to react to normal items that are a part of their environment. Allergies for short. In extreme cases it can actually develop into an autoimmune disorder. I'm not saying that it is healthy to live in a pig sty.
Aristotle said it best when he thought up the "Golden Mean".