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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: 2, Funny) by Anonymous Coward on Thursday August 06 2015, @08:02AM
Why not make the bottles out of solid silver? That would also solve the waste problem, as nobody would just throw them away! ;-)
(Score: 1, Funny) by Anonymous Coward on Thursday August 06 2015, @08:25AM
After I collect 30 silver bottles, can I crucify my neighbor?
(Score: 0) by Anonymous Coward on Thursday August 06 2015, @08:38AM
We *used* to have real silver silverware. Boy was it ever a pain in the ass. I remember as a kid having a can of "Brasso" open and polishing the stuff every weekend.
I could not imagine a worse use for the metal silver than to make eating utensils out of it.
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.
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.
However, I did get a good prank out of some silver nitrate and my friends cousin's bottle of suntan lotion..... I leave it to your imagination what she looked like after a few minutes at the beach.
She was bragging that it would give her the darkest tan on the beach. I made sure it did.
You could say she was well developed.
She got what she was asking for, and still wasn't happy!!!
( Ok, now everybody knows why I was never successful in getting a date... )
(Score: 0) by Anonymous Coward on Thursday August 06 2015, @09:09AM
You kept whining about how you really wanted to date your own sister instead?
(Score: 0) by Anonymous Coward on Thursday August 06 2015, @09:14AM
Well, I wanted to date her...
(Score: 0) by Anonymous Coward on Thursday August 06 2015, @09:17AM
If you were polishing because of the black oxidation, then it's just a lack of knowledge. The black oxidation is easily removed by putting the silver onto some aluminium (like aluminium foil) in salted water. And then you just wait. As a bonus, unlike with polishing, you don't remove some of the silver that way.
I'm not sure if it would work out with the connectors, though (it certainly wouldn't affect the copper, but probably the salted water would cause other problems).
(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.