Thursday 8 December 2016

Scientists get to bottom of perfect pint

Barry Duggan

Published 15/03/2011 | 05:00

BEAUTY is in the eye of the beer-holder.

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Scientists claim they have found the way to pour a perfect pint of Guinness from a can.

Each can of the black stuff contains a widget, a special device to aid with foaming.

However, University of Limerick scientists -- employing applied mathematics -- say the widget can be discarded. "Most beers and fizzy drinks are pressurised with carbon dioxide. However, stouts also contain nitrogen," said Dr William Lee, who led a research team on the thorny issue.

"This creates a problem though -- stouts containing nitrogen will not foam spontaneously, and so the widget was developed to trigger foaming when the can is opened," he explained. Dr Lee's solution is to coat the inside of the Guinness can with cellulose fibres which may produce the same results as a widget, but at a lower cost.

The work of Dr Lee's team has been submitted for publication in the academic journal 'Physical Review E'.

Irish Independent

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