John Cuthber

Ozone is blue and there are a few other coloured gases. I'd like to know what Peristar's aplication for this is.

What's implausible about it?

Chlorides (and the other halides) do a good job of corroding stainless steel. Sodium carbonate (washing soda) would be a better choice. Magnesium sulphate would be better still- it's not so corrosive to skin. The reaction of NaOH and Al certainly gives H2 but, as UC points out, it's not nice stuff to work with.

Dissolve tin in sulphuric acid.

There is no water in the diagram 14.30 of that book. What was the drying agent in the dessicator?

If there were an easier, more ecconomical way of doing it, they wouldn't use the Bayer process. The electrochemical process might work reasonably well but you need to realise that as the concentration of iron in the solution falls the voltage needed to reduce it will rise. At some pont you will reach a potential where it's easier to reduce water to hydrogen so you won't remove all the iron

You can also use relays to do this sort of thing. They are a bit slow.

It's also fairly acidic so it may goagulate proteins in the blood.

You might want to look at the fatty acids contained in coconut oil and, for exaple, tallow or olive oil.

If you carefully add an excess of NaOH you will disolve the Al as sodium aluminate and leave the iron as "Fe(OH)3". It would have been easier to dissolve the bauxite in NaOH to begin with.

That wiki page gives the molecular formula.

I'm glad it amused someone because I can't see this idea doing anything else.

I'm sorry to hear of your misfortune but to be honest I don't think you will have much luck. It would be cheaper to replace the milk than to test it. The best advice I can give is to speak to a doctor about it. If they think it's salmonella then they might be able to get it tested as part of some public health program. If you have recovered in a day or so then it's probably some other "bug". Salmonellosis iusually lasts longer. There's more information about it here. http://en.wikipedia.org/wiki/Salmonellosis

Captain, Did you realise that if it were true that those were the only components of vegetable oils then there would be no unsaponifiable stuff? In real fats there are things like phytosterols and the fat soluble vitamins. At least some of those would act as UV screens and free radical traps. How healthy these are is probably open to debate- too large a dose of some vitamis is seriously toxic, but if you were short of them then this stuff could be a lifesaver. For most of us the answer is probably somewher in between.

I have visions of a newspaper articlew at some stage in the future describing the horrific injuries inflicted on two cyclists who tried to pass eachother on bikes of this sort. "Regretably, the emergency services were unable to cut away the wreckage as the "jaws of life" became irrevokably attached to the real wheel of one of the bikes. First aid treatment was also severly hindered until a bystander (who refused to give his name) supplied a box cutter with a ceramic blade which was non magnetic. The man was last seen heading in the direction of the local flying school. Authorities would like to speak to him urgently. The issue was further complicated because, while both parties has credit cards with them which should have vouched for their abillity to pay medical costs, for some reason neither of their cards worked and nor did those of anyone else involved. A passing physicist was asked to look at the combination of gyroscope forces and magnetic interactions and said "Bugger that!- I'm taking up flower arranging".

BTW, are you planning to go throuhg the whole commodities market one item at a time? Why do you want to know all these prices?

Is it just me who thinks "It's just a joke: get over it"?

OK, but it wasn't the water that was a hazard was it? What radioisotopes were you sloshing about?

Crude iron ore and the stuff made as a by-product of aliminium making are probably even cheaper.

Some of the silicates can be considered as polymers and are inorganic. Just in case anyone wondered, the term for a few polymer molecules stuck together is oligomer. Nitric's idea of "simple" would rule out most nylons, a lot of polyurethanes, aand some other well known polymers like kevlar and polycarbonate. However, the definition of all the terms you ask about probably depends on circumstances and the people talking about them

Oops, I read it as a question. Never mind, I bumped your thread for you. Anyway, from here http://www.bplans.com/plastics_recycling_business_plan/market_analysis_summary_fc.cfm "The Company has chosen its target markets because recycled PET (RPET) is in high demand as flake resin by converters, as roll stock sheet used to produce high visibility packaging and as high strength strapping for the lumber industry. Sales are price-sensitive, so that proximity to markets and feed stock source provide a competitive edge. Replay Plastics identified an opportunity to take advantage of both circumstances in the western United States. RPET Flake Total market demand is reported as 1.2 billion pounds per year. Since only 800 million pounds are processed in the USA, consumers are forced to look at wide spec virgin PET (virgin resin that is outside of spec but still usable) which is normally sold at a discount to virgin prices, but still higher than recycled (RPET) pricing. Some manufacturers are also forced to import materials from Mexico, India and South America. Some converters are being forced to use more expensive virgin resin. The current pricing for virgin resin is $0.65-0.73 per lb. and $0.42-.53 for RPET flake. The spread between the two has traditionally been maintained at approximately $0.20 per lb. PET Film & Sheet The total reported market of extruded film and sheet is 872 million pounds, of which identified industry usage of RPET is 160 million pounds. The reported market demand (to replace virgin PS, PVC and PET) if RPET was available is estimated at 1 billion pounds. Current pricing for RPET sheet is $0.70-0.79 per lb. RPET Strapping The total reported domestic plastic strapping market is 240 million pounds. Of this market, industry usage of virgin polypropylene is 132 million pounds and of PET is 108 million pounds. It is generally accepted in the industry that less expensive strapping made from RPET could not only take over the polypropylene strapping market, but convert as much of the much larger and more expensive steel strapping market as RPET strapping was available. Current pricing for RPET strapping is $0.90 -1.08 per lb." Slightly more really really helpful I hope.

"We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard".

The brain can say if some statements are true but there are some about which we are not sure (not least, the quesstion that forms the title of this thread). I could write a program that, if asked "Is the sum of 2 even numbers an even number?" would reply "Yes". It may well be the the fact that we con often answer general questions like this means that we are not turing machines- but it could be that we are somehow programed to recognise some questions and give the right answer.

"btw this plastic is also known as PET" Yes.

Get 2 plates of glass, put thin spacers between them. Seal round most of the edges to give a big flat very thin glass box. Dissolve the sunscreen up in something- alcohol will probably work, and pour it into the gap between the plates. Seal the last bit of the edge and you have a filter with a known amount of sunscreen distributed evenly over a known area. Just getting hold of the active ingredient in the sunblock might make it easier to get a clear solution. Incidentally, as has been pointed out before, glass blocks a lot of UV. Big sheets of fused quartz are going to cost a fortune. You might want to look up the UV spectra of, for example, perspex, and PVC. Perspex won't survive alcohol indefinitley, but it might give you time to grow some plants. I'd not like to be there when someone trys to spin coat a big glass plate.