• Proceedings of the Korean Nuclear Society Conference
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• 2002.05a
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• pp.316.1-316
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• 2002

• Proceedings of the Korean Nuclear Society Conference
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• 2001.10a
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• pp.328.2-328
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 2002.10a
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• pp.393.1-393
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• 2002

• Food Industry And Nutrition
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• v.10 no.3
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• pp.22-29
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• 2005

• Fisheries and Aquatic Sciences
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• v.17 no.2
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• pp.159-165
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• 2014

In this study, Krill Eupausia superba oil was extracted using different solvents and supercritical carbon dioxide (SC-$CO_2$). During SC-$CO_2$ extraction, the pressure was set at 40 MPa and temperatures ranged from $40^{\circ}C$ to $55^{\circ}C$. We examined the differences in volatile compounds and safety profiles among extraction methods. Volatile compounds were determined using the thermal desorption system integrated with gas chromatography-mass spectrometry (GC-MS). Heavy metal content was analyzed by inductively coupled plasma mass spectrometry (ICP-MS). According to our results 10 volatile compounds were identified in krill sample. After SC-$CO_2$ extraction of oil, the concentrations of volatile compounds decreased, but increased after solvent extraction. In krill, heavy metal concentrations remained within the permissible limit. Moreover, Zn and Fe which have health benefits were detected at high concentrations. During a 90 days storage period at different temperatures, microbial activity was found to be lowest in SC-$CO_2$ extracted residues. Thus, the quality of krill oil and the residues obtained using SC-$CO_2$ extraction was higher and the oil was safer than those obtained using conventional solvent extraction. These results can be applied to the food industry to maintain high quality krill products.

• Applied Chemistry for Engineering
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• v.8 no.5
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• pp.737-741
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• 1997

The typical removal method of volatile organic compounds is adsorption process. In this study, granular activated carbon and activated carbon fiber were used as adsorbents, and the adsorption behavior for the two types of adsorbent was compared. And they were regenerated by supercritical carbon dioxide extraction at a constant temperature, 318.15 K, and 2000, 2500, 3000 psi respectively. The desorption percentage of initial adsorbates and iodine values were increased with pressure of supercritical carbon dioxide. The regeneration time was 70 and 60 minutes in adsorbents loaded with methyl ethyl ketone(MEK) and benzene, respectively. The desorption percentages were 64.0% for granular activated carbon and 55.3% for activated carbon fiber loaded with MEK, and 59.1% for granular activated carbon and 45.2% for activated carbon fiber loaded with benzene. The exit concentration could be evaluated by Tan and Liou model. Therefore, the granular activated carbon and the activated carbon fiber could be regenerated by supercritical fluid extraction process.

• Journal of the Korean Applied Science and Technology
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• v.34 no.3
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• pp.623-630
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• 2017

The purpose of this study was to investigate the possibility of applying cosmetic material about extracted from Lycii Fructus seed supercritical fluid. This study was conducted to evaluate the anti-melanogenesis effect and antimicrobial activity about the extracts from Lycii Fructus seed. These researches studied for emulsion physical stability of pH, viscosity, particle size from emulsion containing Lycii Fructus seed extract. As a result, the supercritical fluid extract from Lycii Fructus seed significantly inhibited melanin synthesis by 81.86 % at the concentration $750{\mu}g/mL$. Antimicrobial effects of extract was determined against Staphylococcus aureus, Candida albicans, Escherichia coli. except by Staphylococcus epidermidis. The physical stability of viscosity and pH on the emulsion containing Lycii Fructus seed extract were stable for 28 days. Emulsion containing Lycii Fructus seed extract did not change particles at observation into optical microscope. These results suggest that extracts from Lycii Fructus seed may have value as the potential cosmetic formulation.

• Korean Journal of Food Science and Technology
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• v.36 no.2
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• pp.317-320
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• 2004

Physiological effects of curcumin, major yellow-colored pigment in tumeric (Curcuma longa L.), extracted by traditional extracting methods, ethanol and hot-water extractions, and supercritical fluid extraction (SFE) using supercritical carbon dioxide as new extracting method. Antioxidative activity of ethanol extract was higher than those of SFE and hot-water extracts. Results of Ames mutagenicity test on SFE, ethanol, and hot-water extracts revealed no mutagen in the extracts. Antimutagenicity rates of SFE, ethanol, and hot-water extracts against direct mutagen, 2-nitrofluorene (2-NF), were 20.1, 9.3, and 15.2%, respectively. Antimutagenicity rate of SFE extract against TA98 derived from indirect mutagen, 2-acetamidofluorene (2-AF), was 12.2%, whereas none was observed in ethanol and hot-water extracts. Nitrite-scavenging ability of SFE extract was higher than those of ethanol and not-water extracts.

• KSBB Journal
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• v.18 no.4
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• pp.301-305
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• 2003

The study of pancreatin extraction was investigated by supercritical fluid process. Using supercritical carbon dioxide extraction with entrainer the purification of pancreatin was possible to remove lipids from Hog pancreas. To observe the optimum conditions different experimental variables were changed as pressure, temperature, flow rate of solvent and 0.25 mm of sample size were evaluated for effective removal of lipids. Ethanol and n-hexane were used as an entrainer with 5 mL/min. Increasing pressure at constant temperature the efficiency of the lipid removal in Hog pancreas was improved and the protein was concentrated without denaturalization, compared that of the control Hog pancreas. The most efficient conditions of lipid elimination were 17 MPa of pressure and 35$^{\circ}C$ of temperature and 0.25 mm of sample size.

• Applied Chemistry for Engineering
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• v.8 no.5
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• pp.860-865
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• 1997

Brown rice oil contains palmitic acid, linolenic acid, linoleic acid, oleic acid, stearic acid, tocopherol, squalene, etc. The oil including essential fatty acids was extracted from the domestic brown rice bran using supercritical carbon dioxide(SCC) process, and the extracts were analyzed with GC-MSD. The extraction amount of brown rice oil was dependent upon the operating pressure and temperature, and the fatty acid composition of oil was varied with the reduced density(${\rho}_{\gamma}$) of the SCC. About 70~80% of brown rice oil was extracted in 4 hours. Especially, squalene which was not found in solvent extract phase was identified in supercritical fluid extraction phase only.