Consumers may soon be able to go for longer between milk-buying trips. That's because Brazilian company Agrindus hopes to start marketing plastic milk bottles that use embedded silver nanoparticles to kill bacteria. Grade A pasteurized fresh whole milk packaged in those bottles can reportedly last for up to 15 days, as opposed to the usual seven.
The technology was developed by partner company Nanox, and involves first coating silica ceramic particles with silver nanoparticles. This reportedly has a synergistic effect, with the silica boosting the antimicrobial properties of the silver.
Those coated particles take the form of a powder that is subsequently mixed into liquid polyethylene. Using blow- or injection-molding, that plastic is then made into bottles which Agrindus plans to sell to dairy goods companies. The particles can also be used to make milk bags, which should extend shelf life from four to 10 days.
(Score: 0) by Anonymous Coward on Thursday August 06 2015, @08:21PM
Well, making coax connectors out of it seemed nearly as bad. I was told that the black silver tarnish was conductive, but it sure looked bad.
Electricity does not care how it looks. Silver, like aluminium, and perhaps other metals, tarnishes a thin airtight layer, and then tarnishes no further until some idiot abrades it off with metal polish. Thus protecting the copper inside, which will eventually decompose into a green oxide if exposed to oxygen.
Every attempt I did at cleaning the connector only caused the copper wire parts of the connector to corrode, and made the connector useless if DC leakage was critical.
See above reference to idiots with metal polish.
(Score: 0) by Anonymous Coward on Friday August 07 2015, @02:58AM
Thanks... what you described is exactly what went down.
I am older and wiser now, but in my youth I did many an asinine thing. Fortunately lived to tell about it.
I guess the most terrible thing is with as much experience as I have acquired, I *still* do quite asinine things from time to time.
Usually not nearly as dangerous, but every bit as destructive and wasteful of resources.
Not intentionally, but as a result of a failed attempt to do something.
Signed:
The idiot with the can of metal polish.