The Science of Beer: Cracking the Froth Enigma

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	The Science of Beer: Cracking the Froth Enigma

Android9

4-26-2007 7:10 PM

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tags:

beer, science, seed, guinnes, larger, pint, beer foam, froth, 3d

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/b764b182-faa9-41f8-8e14-0133e5b0ce79/4CB7E0FD-B186-4DA4-818F-A1B6F4F422D3/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php" href="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php" style="font-size: 11px;">www.seedmagazine.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php"><P>PARIS (AFP)—There is the nagging question of whether life exists other than on Earth. The enduring mystery of who made us—and why.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php"><P>And then there is this: Why does the foam on a pint of lager quickly disappear but the head on a pint of Guinness linger?</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php"><P>Writing in the prestigious British science journal Nature, an elite scientific duo say they have devised an equation to describe beer froth.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php"><P>The breakthrough will not only settle the vexatious lager vs. stout debate, it will also help the quest to pour a perfect pint every time.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php"><P>Beer foam is a microstructure with complex interfaces. In other words: a cellular structure comprising networks of gas-filled bubbles separated by liquid.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.seedmagazine.com/news/2007/04/head_start_scientists_crack_be.php"><P>The walls of these bubbles move as a result of surface tension--and the speed at which they move is related to the curvature of the bubbles. As a result of this movement, the bubbles merge and the structure "coarsens," meaning that the foam settles and eventually disappears.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/4CB7E0FD-B186-4DA4-818F-A1B6F4F422D3/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>