Tuesday, June 06, 2006

The Silver Solution?

If I were still making even the slightest effort to maintain my credentials as a microbiologist, I would be on top of the latest news on antimicrobial products and technology rather than reading about it in the newspaper. But, I don't so I wasn't and I did. I would always mention in my beginning lectures on antimicrobials that heavy metals had antibacterial properties and would use such examples as organic mercury, gold, and silver to achieve disinfection.
Well, they have moved on in this area using a new science called nanotechnology to produce some really neat sounding new products. Silver nanoparticles are being incorporated into soaps and other consumer goods such as socks. The soap is called Cor and is the next in way to keep microbes off the skin. It had better work, however, since it costs about $115 a bar. My Dial would have to fail me mightily to induce me to switch, however. Toothpaste is said to be the next product to look for. Other products, however,are already here. Sharper Image sells a set of plastic food containers with imbeded silver which are intended to keep food fresher for longer. One owner reported keeping strawberries fresh for 14 days in such containers. Samsung has a washing machine launched in the U.S. which uses silver ions to sanitize laundry. The washer has a grapefruit sized drum which uses electrical currents to nano-shave two silver plates each time the washer is turned on. The resulting ions interact with the bacteria to disrupt membrane functions and very effectively reduce the bacterial count in your laundry ( hospital usage here?). The silver plates will last 10 years according to Samsung and even though they cost $1200 at Best Buy, for example, you don't have to use hot water to kill 99.9% of the microbes in your wash.
If you want to try the product and have a special need, you can go to WalMart and buy some sports socks with E47 (element 47 or silver which has an atomic number of 47). Supposedly they keep your feet warm in winter, cool in summer, and your feet don't stink.
We will be hearing a lot more about nanotechnology in general and disinfection products in particular.

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