• The Korean Journal of Food And Nutrition
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• v.34 no.4
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• pp.356-364
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• 2021

This study was carried out to investigate the effects of supercritical carbon dioxide (SC-CO₂) extracts from sweet potatoes (SP) and watermelon (WM) on the oxidative stability of perilla seed oils (POs) over the existing ones. A comparison was done between the oxidative stability of perilla oil (PO) after the addition of 0.1% of SP, and WM extracts and PO without extract. The oxidative stability was measured based on the viscosity, acid value (AV), peroxide value (POV), antioxidant (DPPH) activity, p-anisidine value (p-AV), and fatty acid composition. The viscosities ranges were: PO without extract, from 53.99±0.99 to 74.38±1.61 cps, PO with SP extract, from 53.99±0.10 to 58.73±0.8 cps, and PO with WM extract, from 53.98±0.10 to 56.00±0.70 cps. While the PO containing the SC-CO₂ extracts had significantly lower AV, POV, and p-AV, their antioxidant activity was approximately 10 times higher than that of the PO without extract. There were no significant differences in fatty acid composition between SC-CO₂ extracts added groups and PO without extract (p<0.05). The findings of this study confirmed that the SC-CO₂ extracts from sweet potatoes and watermelon enhanced the oxidative stability of perilla seed oils, and are potential natural antioxidants for use in the food industry.

• Food Science and Preservation
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• v.20 no.5
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• pp.597-601
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• 2013

In this study, we searched for bioactive compounds from natural resources with a supercritical extract. We selected the extracts of Chrysanthemum zawadskii, Lufa cylindrica, Paeonia lactiflora, Gardenia jasminoides and Scutellaria baicalensis, as natural materials, and evaluated the effects of their skin barrier function. We found that these extracts increased the transactivation activity of the PPAR-responsive element (PPRE) and the anti-oxidation with different priorities, respectively. In addition, these extracts promoted the expression of proteins related to cornified envelope (CE) formation, such as involucrin. From these results, we suggest that natural materials from supercritical extracts will be pertinent candidates for the improvement of the epidermal permeability barrier function.

• 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.

• Bulletin of the Korean Chemical Society
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• v.26 no.3
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• pp.423-427
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• 2005

The bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex-272) and sodium diethyl- dithiocarbamate (NaDDC) ligands were used to extract of metal ions ($Cd^{2+},\;Co^{2+},\;Cu^{2+},\;Pb^{2+},\;Zn^{2+}$) in supercritical $CO_2$. Experiments showed a strong synergistic effect and better extraction efficiency if the two ligands were used together. In-situ UV-visible observation indicates that NaDDC in the water/supercritical $CO_2$ started to decompose slowly. The synergistic effect seems to come from the deprotonation of the organophosphorus ligand by amines from the decomposed NaDDC. The enhancing role of amines was confirmed using the mixture of Cyanex-272 and diethylamine(DEA) in the metal extraction.

• Journal of Life Science
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• v.13 no.5
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• pp.569-575
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• 2003

Supercritical $CO_2$ extraction was applied to extraction of the valuable compound for benign prostatic hyperplasia from saw palmitto. Three levels of parameters, temperature $(35^{\circ}C,\; 60^<\circ}C)$, pressure 22∼30 Mpa and ethanol modified solvent concentration, were used as the independent variables of central composite to rotate the design. The extracting pressure and temperature interaction was significantly affected the extraction of valuable compounds. The ethanol was an efficient modifier to extract valuable compound by supercritical carbon dioxide. The optimal processing conditions were extracting pressure, 30 Mpa, extracting temperature, $60^<\circ}C$, ethanol modifier, 15% for extracts of the valuable compounds from saw palmitto. In conclusion, it was found that supercritical $CO_2$ extraction can successfully be applied to extract high quality extracts from saw palmitto.

• Journal of Applied Biological Chemistry
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• v.53 no.1
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• pp.13-20
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• 2010

Biological activities such as anti-oxidative and anti-microbial of the Seungmakalgeuntang, a traditional prescription, were evaluated. The electron donating ability of water, ethanol, supercritical fluid and 1,3-butylene glycol extract of Seungmakalgeuntang showed more than 50% at a 100 ppm concentration. At a 1000 ppm concentration, the superoxide dismutase-like activities of ethanol and supercritical fluid extract of Seungmakalgeuntang showed less than 50%. xanthine oxidase inhibition effect of the supercritical fluid extract showed more than 70% at a 1,000 ppm concentration, which was higher than vitamin C. From the measurement on lipid oxidation, the $Fe^{2+}$ chelating abilities of the supercritical fluid extract of Seungmakalgeuntang was more than 60% at a 100 ppm concentration. Also the $Cu^{2+}$ chelating abilities of supercritical fluid extract Seungmkalgeuntang was showed more than 60% at a 500 ppm concentration. Clear zones formed by sample against the human skin-resident microflora such as Staphylococcus epidermidis, Staphylococcus aureus and Propionibacterium acne of ethanol and supercritical fluid extract of Seungmakalgeuntang showed the highest among all the extracts tested using a 4mg/disc. The minimum inhibitory concentration (MIC) against both S. epidermidis and S. aureus showed 2,500 ppm in the extract of the supercritical fluid.

• Journal of Convergence for Information Technology
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• v.11 no.12
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• pp.236-243
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• 2021

The aim of this study was to evaluate the anti-oxidant and anti-wrinkle effect of the black carrot(BC) extracted by supercritical dioxide(SC-CO₂). DPPH/ABTS radical scavenging and total polyphenol contents were measured to investigate the anti-oxidant activity of the BC supercritical extract. Collagen production and MMP-1 expression were assessed in normal human dermal fibroblasts(NHDF) for anti-wrinkle activity, The black carrot extract showed the highest total phenolic content(9.037±1.123 mg GAE/g extract) and the best antioxidant properties as shown by DPPH and ABTS assay. The supercritical fluid extracts of black carrot exhibited low toxicity to NHDF cells. In addition, the supercritical fluid extracts showed MMP-1 inhibition and type I pro-collagen synthesis inducing activities in a dose-dependent manner, respectively. Therefore, these results suggest that the black carrot is a potential source of high anti-oxidative, solvent-free and anti-aging material with promising applications in cosmetic, food, and beauty-food industries.

• Journal of Life Science
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• v.18 no.2
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• pp.213-219
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• 2008

Flavonoids in pine needles are known to be effective scavengers of free radical. Especially, proanthocyanidin, a kind of flavonoids possesses cardiovascular protection and antioxidative activities. Here, we evaluated proanthocyanidin contents in total polyphenolic compounds of pine needle extracts prepared by using hot water, ethanol, hexane or sub-supercritical $CO_2$. Analyses of total polyphenolic compounds and proanthocyanidin in each extracts indicated that hot water extract contained the highest concentrations, but sub-supercritical extract contained the lowest concentrations. On the other hand, evaluation of proanthocyanidin contents in total polyphenolic compounds in each extracts showed that sub-supercritical extract possessed the highest content, but hot water extract possessed the lowest content. These results indicate that extracts containing high concentrations of both total polyphenolic compounds and proanthocyanidin could be obtained by using hot water or ethanol extractions. Furthermore, extract containing high content of proanthocyanidin out of total polyphenolic compounds could be achieved by using sub-supercritical extraction. Measurement of antioxidative activities of extracts showed that hot water extract possessed the highest activity. In this study, we prepared extracts from pine needles by four different methods and evaluated the antioxidative compounds in extracts that could be used for effective components of functional food products.

• International Journal of Advanced Culture Technology
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• v.8 no.3
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• pp.231-240
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• 2020

In this paper, we present to evaluate physiological activity of Asparagopsis armata extraction. After extraction with Asparagopsis armata using hydrothermal and supercritical carbon dioxide, various physiological activities were examined. The total concentration of polyphenol compounds was determined to be 18.85 mg/g of hydrothermal Asparagopsis armata extraction and 14.74 mg/g of supercritical Asparagopsis armata extraction. In DPPH radical scavenging assay, ascorbic acid was used as positive antioxidant control. In ABTS radical scavenging assay, ascorbic acid was used as positive antioxidant control. The percentage of inhibition and IC50 were measured. The IC50 of Asparagopsis armata extraction is 261.44ppm and the IC50 of supercritical Asparagopsis armata extraction is 153.98 ppm. The elastase inhibitory assay showed concentration dependence and the IC50 of hydrothermal Asparagopsis armata extraction is 3387 ppm and the IC50 of supercritical Asparagopsis armata extraction is higher than 2500 ppm. In mushroom tyrosinase inhibition experiments, tyrosinase inhibition's IC50 of supercritical Asparagopsis armata extraction was 248.06. In the SOD-like experiments, the concentration-dependent results were showed and IC50 of hydrothermal Asparagopsis armata extraction is 845.29 ppm. In the antimicrobial experiments, maximum clear zones of supercritical Asparagopsis armata extraction represented 23.00 mm in Propionibacterium acnes. In the other hand, in experiments with the same conditions, hydrothermal Asparagopsis armata extraction had no effect in all strains.

• KSBB Journal
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• v.23 no.2
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• pp.153-157
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• 2008

Maca (Lepidium meyenii) has been used as a food and medicine in Peru for thousands of years. More recently a wide array of commercial maca products have gained popularity as dietary supplements with claims of anabolic and aphrodisiac effects. Even though the biologically active principles of maca are not fully known, the lipidic extract of maca tubers containing macamides showed promising physiological activities. In this study, the lipidic extract were collected from maca tubers by using supercritical carbon dioxide ($SCO_2$). Substance estimated as macamide in the extract was isolated and purified by preparative HPLC with recycling system. Two of the purified substance was identified as N-benzyl-5-oxo-6E,8E-octadecadienamide and N-benzylhexadecan amide by LC/MS, $^1H$-NMR and $^{13}C$-NMR analyses.