earticle

영어

The goals of this study were to produce the useful materials such as amino acid by subcritical water hydrolysis from supercritical extracted krill residues and to compare the results with raw krill. Subcritical water hydrolysis efficiency from raw and deoiled krill was examined over the temperature range of 200 to 280ºC, ratio of material to water for hydrolysis was 1:50 and for water-sample contact equilibration times of 5 min to decrease the decomposition of amino acids. The
hydrolysis efficiencies of glycine, alanine, and valine were observed to increase with increasing water temperature, consistent with higher solubility at higher temperatures. The highest yield of amino acids in deoiled krill hydrolyzate was at 280ºC. While, the highest amino acid yield in raw krill hydrolyzate was at low temperature 200ºC. The presence of oil in the raw material may interfere the break down of peptide bond of protein by subcritical water hydrolysis at high
temperature. Oil may form on complex with protein that may decrease the protein hydrolysis by subcritical water. Also, reducing sugars content was analyzed in both and the result showed that the reducing sugar yield in deoiled krill hydrolyzate was higher than that of raw krill hydrolyzate.