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July 17, 2015
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Georgia Tech graduate student Sheng-Sheng Yu holds a sample subjected to repeated wet-dry cycles.
Georgia Tech graduate student Sheng-Sheng Yu holds a sample that has been subjected to repeated cycles of wet-dry conditions. From amino acids and hydroxy acids, the process results in a mixture of polyesters and peptides containing as many as 14 units.
Credit: John Toon, Georgia Tech
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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