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In relation to this article, we declare that there is no conflict of interest.
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Received September 23, 2003
Accepted March 2, 2004
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Behavior of Hydrothermal Decomposition of Silk Fibroin to Amino Acids in Near-Critical Water

Institute of Seafood Science, Faculty of Food Science & Biotechnology, Pukyong National University, Busan 608-737, Korea
Korean Journal of Chemical Engineering, May 2004, 21(3), 654-659(6), 10.1007/BF02705501
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Abstract

The behavior of protein decomposition to amino acids in near-critical water is elucidated by using silk fibroin as a model compound. Results show that serine (Ser), aspartic acid (Asp) and other complex amino acids, obtained initially in significant amount, gradually decreased as reaction time and temperature were increased. At temperature higher than 523 K, it is likely that Gly and Ala underwent further decomposition. Regarding the effect of various additives, no significant effect on the yield of amino acids was observed with the addition of oleic acid. However, the presence of NaOH and formic acid (FA), both in 5 mol% aqueous solution, had significant effect on the yield. The effect of alkalinity and acidity, the production of amino acids was enhanced in either acidic or basic conditions.

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