Alan Izhar-Bodner, an Israeli inventor, has developed a way for divers to breathe underwater without cumbersome oxygen
tanks. His apparatus makes use of the air that is dissolved in water, just like fish do.
(From Breathe like a fish!)
The system uses the "Henry Law" which states that the amount of gas that can be dissolved in a liquid is proportional to the
pressure on the liquid. Raise the pressure - more gas can be dissolved in the liquid. Decrease the pressure - gas dissolved in
the liquid releases the gas. This is exactly what happens when you open a can of soda; carbon dioxide gas is dissolved in the
liquid and is under pressure in the can. Open the can, releasing the pressure, and the gas fizzes out. [ Twisted Physics: 7
Mind-Blowing Findings]
Bodner's system apparently uses a centrifuge to lower pressure in part of a small amount of seawater taken into the system;
dissolved gas is extracted. The patent abstract reads:
A self-contained open-circuit breathing apparatus for use within a body of water naturally containing dissolved air. The
apparatus is adapted to provide breathable air. The apparatus comprises an inlet means for extracting a quantity of
water from the body of water. It further comprises a separator for separating the dissolved air from the quantity of
water, thereby obtaining the breathable air. The apparatus further comprises a first outlet means for expelling the
separated water back into the body of water, and a second outlet means for removing the breathable air and supplying
it for breathing. The air is supplied so as to enable it to be expelled back into the body of water after it has been
breathed.
Human beings have been thinking about how to breathe underwater since they started swimming. This long-held desire plays
an important part in one of the first great science fiction novels, Jules Verne's 20,000 Leagues Under the Sea. [ Top 10 Scary
Sci-Fi Series]
It consists of a reservoir of thick iron plates, in which I store the air under a pressure of fifty atmospheres. This
reservoir is fixed on the back by means of braces, like a soldier's knapsack.

[url]livescience.com/3829-invention-humans-breathe-fish.html[/url]

Halleluyah, stones like me can finally enjoy swimming.

Them innovations keep coming.

More of this bro.