Science Buddies: "Ask an Expert"

hello,expert.
1.can i know,how the fish drink seawater?

if the fish drink seawater,i think,i want to apply the way it drink,to filter the seawater.

2.can oil spill frozen using hydrogen?
does it have side effect?

i hope,you can help me for the answer

Hi,

Here are sites that talk about how fish regulate salt concentrations in their bodies relative to the water envirionment they live in:

http://www.fishdoc.co.uk/water/osmoregulation.htm

http://www.earthlife.net/fish/oregulate.html

http://icb.oxfordjournals.org/cgi/reprint/41/4/781

http://www.cartage.org.lb/en/themes/sci ... lation.htm

The following is an 80 page paper extensively reviewing the structure and function of gills. WARNING: it is a PDF file that is slow to download except over a very fast connection.

http://physrev.physiology.org/cgi/reprint/85/1/97

As to your second question:

2.can oil spill frozen using hydrogen?
does it have side effect?

I am not sure what you are asking. I do not think hydrogen gas would react with an oil spill to freeze it or make it solid, though under some conditions hydrogen will react with unsaturated carbon - carbon bonds such as are present in oil to make saturated hydrocarbons that have melting points that are higher. I don’t think that this idea has practical value in controlling an oil spill. If you mixed liquefied hydrogen with crude oil rhe crude oil would freeze very solid. Sea water would also freeze solid if it came in contact with liquid hydrogen. Again, I do not think this has any practical value.

Good luck with your science fair project!

Best regards,

Barrett L. Tomlinson

mmm...i cannot use hydrogen to frozen the oil spill,ya?
anyway,
thank you very much,Barrett L. Tomlinson!