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http://dx.doi.org/10.3746/jkfn.2008.37.10.1330

Changes of Quality Characteristics of Dongchimi by Supercritical Carbon Dioxide as Sterilization Method  

Hong, Joo-Heon (Bio Industry Center, Daegu Technopark)
Park, Joo-Seok (Bio Industry Center, Daegu Technopark)
Lee, Wong-Young (Dept. of Food Engineering, Kyungpook National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.37, no.10, 2008 , pp. 1330-1336 More about this Journal
Abstract
Here we studied the changes on quality characteristics of Dongchimi by supercritical carbon dioxide to manufacture Dongchimi of high quality. There were no distinctive changes of acidity, pH, color difference, free sugar and organic acid of the Dongchimi treated with supercritical $CO_2$, compared to the control. The content of vitamin C in Dongchimi, which was treated with supercritical $CO_2$ (at 25 MPa, $35^{\circ}C$) was 0.826 mg/mL, and was similar to that of 0.1 MPa. Unpleasant volatile compounds such as dimethyl disulfide, metyl trisulfide and methyl propyl disulfide in Dongchimi were decreased by supercritical $CO_2$; also, treatment of supercritical $CO_2$ was useful to improve flavor of Dongchimi. Polygalacturonase activity was decreased 40.3% after supercritical carbon dioxide treatment at 25 MPa and $55^{\circ}C$.
Keywords
Dongchimi; supercritical carbon dioxide; polygalacturonase; quality characteristic;
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