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Amino Acid Recovery from Brown Seaweed(Undaria pinnatifida) Using Subcritical Water Hydrolysis  

Kwon, Kyung-Tae (Faculty of Food Science and Biotechnology, Pukyong National University)
Jung, Go-Woon (Faculty of Food Science and Biotechnology, Pukyong National University)
Chun, Byung-Soo (Faculty of Food Science and Biotechnology, Pukyong National University)
Publication Information
Korean Chemical Engineering Research / v.48, no.6, 2010 , pp. 747-751 More about this Journal
Abstract
The objective of this research were to produce amino acids from freezing-dried brown seaweed(Undaria pinnatifida) powder by sub- and supercritical water hydrolysis and to characterize the products. The hydrolysis was carried out in a batch type reactor consisting of 4.6 cm inside diameter and $200cm^3$ vessel and stir made of Hastelloy 276. A stir inside the reactor was continuously moving at 100 rpm. Brown seaweed powder and 100 mL of 1% acetic acid in distilled water were charged into the reactor at a ratio of 1:100(w/v). The applied conditions were $180{\sim}374^{\circ}C$, respectively for 1 hour. The total amino acid content was found to be significantly higher in brown seaweed hydrolyzed by low temperature comparing to high temperature. The amounts of low molecular weight amino acids(glycine, alanine, serine etc) were higher than that of high molecular weight amino acids. The maximum yields of amino acids were produced at low temperature($220^{\circ}C$) with acid catalyst.
Keywords
Brown Seaweed; Subcritical Water Hydrolysis; Amino Acid;
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Times Cited By KSCI : 3  (Citation Analysis)
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