Making Antibubbles in Beer from Belgium 204
An anonymous reader writes "About.com reports on "Antibubbles in beer from Belgium". Scientists in Belgium have studied the movement of antibubbles (the exact opposite of regular bubbles) in Flemish beer. They found that the beer was very similar, but not the same as, dishwater.
You can also learn how to make antibubbles in your kitchen from soapy water."
Water-air-water (Score:2, Informative)
Re:Raindrops (Score:2, Informative)
Re:antibubbles and decomposition (Score:3, Informative)
From what I can gather, the difference is the way air reacts in a liquid containing surfactants: Definition: a linear molecule with a hydrophilic (attracted to water) head and a hydrophobic (repelled by water) end. Surfactants tend to clump together when in solution - forming a surface between the fluid and air with the hydrophobic tails in the air and the hydrophilic heads in the fluid.
It actually sounds very similar to the formation of a bubble, but in this case, before the surface tension forces it into the shape of a filled sphere, the two ends of the shape are attracted to each other and attatch, trapping a globule of water. I can definitly see hydrophobic/hydrophilic forces being stronger, or at least quicker than brute surface tension. Instead of it just being a matter of the two substances (the air and water) trying to group their molecules together, there's the added draw of satisfying the hydrophobic/hydrophilic ends of the molecule by butting them up against air and water respectively.
Misnomer (Score:5, Informative)
I always get a bit annoyed when I see this type of thing. Calling them 'antibubbles' makes them sound exciting, saying they are 'the exact opposite of bubbles' makes them sound intriguing.
The exact opposite of a bubble would be an airborn droplet.
These are 'hollow bubbles' if anything
Link to real article (Score:5, Informative)
Here is a link to an article . I looks like they produce a cell membrane with air in the middle.
This membrane is stable because the hydrophobic chains of the surfactant molecules are slightly electronegative.
Re:antibubbles and decomposition (Score:3, Informative)
drink less, RTFA more (Score:3, Informative)
See them at Antibubble.org (Score:5, Informative)
Re:Misnomer (Score:5, Informative)
The article refers to the first kind of bubble. That way their definition of antibubble works perfectly, reversing the liquid and the gas in a (soap) bubble.
Re:Misnomer (Score:3, Informative)
Re:what does (Score:3, Informative)
"Fluid" Troll (Score:2, Informative)
Re:Experiments == the Scientific Method (Score:4, Informative)
Some antibubble references:
C.L. Stong, "Curious Bubbles in Which a Gas Encloses a Liquid Instead of the Other Way Around",
Scientific American Magazine, THE AMATEUR SCIENTIST, April 1974
Project websites:
J. Thomas page
http://www.antibubble.org/
Science Hobbyist Page
http://amasci.com/amateur/antibub/antibub1.html
T. Fritz page (more advanced tricks)
http://hot-streamer.com/antibubbles/
easy anti-bubble observation (Score:2, Informative)
No need to go down to your local pub, you can get this fresh taste by getting a can of Guinness from you local super market. It is charged with nitrogen when you open the can. The process for the 'nitrogen cakes' in the can is described in U.S. patent no. 4,832,968 [uspto.gov].