• Korean Journal of Medicinal Crop Science
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• v.19 no.1
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• pp.38-46
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• 2011

In this study, we investigated maximum yield of radical scavenging activity (RSA) using each of various extraction solvents and procedure from noni friut (Morinda citrifolia). Noni fruits were either sun-dried (FS) or hot-air dried (FO) at $60^{\circ}C$ after steam blanching. For optimum aqueous extraction, noni fruits should be sun dried and autoclave extraction time should not be over 30 min to produce extraction with high RSA with low cost. In case of 50% ethanol extraction, reflux extracts of FS and FO resulted in $IC_{50}$ of 1.92 mg/mL and 3.06 mg/mL at 8 hr. When $IC_{50}$ values were lower than 5 mg/mL, coefficient of correlation was 0.71 indicating that 71% of the phenolic antioxidants in noni fruits were accounted for the activity by scavenging free DPPH. However, coefficient of correlation significantly decreased to 0.63 over $IC_{50}$ values of 5 mg/mL. Autoclave extraction contained chlorogenic acid of $14.69 \;{\mu}g/mL$ and scopoletin of $3.86 \;{\mu}g/mL$. Reflux extraction showed all three compounds, chlorogenic acid ($26.19 \;{\mu}g/mL$), quercetin ($19.59 \;{\mu}g/mL$), and scopoletin ($17.4 \;{\mu}g/mL$). Therefore, the result of this study indicated that the potential antioxidant activities and functional values were obtained significantly with reflux extraction from noni fruit.

• Korean Journal of Food Science and Technology
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• v.29 no.4
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• pp.790-799
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• 1997

The purpose of this study is to investigate the effects of yeast addition as starter on kimchi fermentation. The strains used as starter were Saccharomyces sp. YK-17 and Saccharomyces fermentati YK-19 isolated from kimchi, grew under anaerobic condition and low temperature, which showed the acid and base resistances. Chemical and microfloral changes, as well as the sensory properties of starter added kimchi during fermentation were compared with the control fermented without starter. The acidity of kimchi juice was lower and pH was higher in starter added kimchi than the control. Particularly addition of S. fermentati YK-19 prolonged the optimally fermented period (pH 4.0, acidity $0.6{\sim}0.8%$) up to more than 63%. The content of lactic acid, the major non-volatile organic acid in kimchi, was increased rapidly followed by S. sp. YK-17 and S. fermentati YK-19 group. The microfloral changes were found a little different among the samples. Among the microorganisms, Leuconostoc sp. and Lactobacillus sp. showed highest change, and Streptococcus sp. and Pediococcus sp. showed ralatively low change. The growth of Lactobacillus sp. which was the main acidifing microorganism was inhibited by starter addition, particularly by S. fermentati YK-19. The sensory characteristics of acidic and moldy flavor were significantly reduced by the addition, while fresh flavor was increased in starter added group.

• Elastomers and Composites
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• v.47 no.4
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• pp.355-363
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• 2012

A series of poly(hydroxyamide)s (PHAs) having trifluoromethyl group were prepared by direct polycondensation of aromatic diimide-dicarboxylic acids with 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane by thionyl chloride and triethyl amine in N-methyl-2-pyrrolidinone (NMP). The PHAs exhibited inherent viscosity in the range of 0.54-0.96 dL/g at $35^{\circ}C$ in DMAc solution. All PHAs were readily soluble in a variety of organic solvents, whereas the polybenzoxazoles (PBOs) were quite insoluble except partially soluble in sulfuric acid. PHAs were converted to PBOs by thermal cycling reaction with heat of endotherm. The maximum weight loss temperature of the PHAs occurred in the range of $559-567^{\circ}C$. The PBOs showed relatively high char yields in the range of 47-59%. Pyrolysis Combustion Flow Calorimeter (PCFC) results of the PBOs showed 12-19 W/g heat release rate (HRR), and 2.7-3.6 kJ/g total heat release (total HR). The HRR of PBO 1 showed the lowest value of 12 W/g, which was 37% lower than that of PBO 3 (19 W/g).

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.8
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• pp.3425-3428
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• 2015

Objective: To explore the association of serum tumor abnormal protein (TAP) with other serological biomarkers e.g. carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA125), carbohydrate antigen 19-9 (CA19-9) and its clinical application in colorectal cancer (CRC) patients. Methods: Patients (N=98) were enrolled into this study with histologically or cytologically confirmed CRC. Using a test kit, the level of TAP was determined, while chemiluminescence was used to measure the levels of some other common serological biomarkers e.g. CEA, CA125 and CA19-9. Results: The area of TAP condensed particulate matter decreased after chemotherapy compared with before chemotherapy when CT or MRI scans showed disease control. In contrast, it increased with disease progression (P<0.05). Furthermore, a statistically significant difference was confirmed in monitoring of TAP and common serological biomarkers e.g. CEA and CA19-9 (p<0.05). Conclusions: Detecting TAP in CRC patients has high sensitivity and specificity and can be used as a new independent indicator for clinically monitoring CRC patients in the course of chemotherapy.

• Analytical Science and Technology
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• v.19 no.5
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• pp.415-421
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• 2006

The following concentrations of some PAHs were investigated; [benzo(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, dibenzo(a,h)anthracene, benzo(g,h,i)perylene, indeno (1,2,3-c,d)pyrene] in vegetables(n=160) and fruits(n=50). The food samples were purchased at the local markets in Seoul, Chuncheon, Daejeon, Kwangju and Pusan. The samples were radish, onion, bean sprouts, welsh onion, chinese cabbage, spinach, young pumpkin, garlic, cucumber, carrot, lettuce, sesame leaf, tangerine, persimmon, apple, pear and banana. The methodology involved ultrasonic extraction with dichloromethane, clean-up on Sep-Pak florisil cartridges and determination by HPLC/FLD (High Performance Liquid Chromatography/Fluorescence Detector). Overall method recoveries for 8 PAHs spiked into these products ranged from 95 to 102%. The mean level of the following PAHs were determined; benzo(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, dibenzo(a,h)anthracene, benzo(g,h,i)perylene and indeno(1,2,3-c,d)pyrene in vegetables and fruits was N.D., 0.014 ng/g, 0.031 ng/g, 0.016 ng/g, 0.019 ng/g, 0.091 ng/g, 0.016 ng/g and N.D., respectively.

• Korean Journal of Medicinal Crop Science
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• v.23 no.3
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• pp.207-213
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• 2015

The purpose of this study was to determine the possibility of using Wasabi japonica Matsum leaves as natural health food source. To accomplish this purpose, the contents of general and antioxidative nutrients of Wasabi japonica Matsum leaves were measured. The contents of carbohydrate, crude protein, crude lipid and ash are 53.41%, 25.00%, 7.95% and 13.64%. And the calories of Wasabi leaves was 385.23 Kcal. Total dietary fiber was 52.27%. The K was the largest mineral followed by Ca, P, Mg which means Wasabi leaves is alkali material. The contents of sinigrin and allyisothiocyanate in the wasabi leaves were 69.2 mg/g and 241.0 mg/g, respectively. Total phenol contents of the hot water extract and the 70% ethanolic extract were $19.44{\pm}0.23$ and $19.33{\pm}1.17mg$ GAE/g, respectively. The total flavonoids content of the hot water extract and the 70% ethanol extract were $7.69{\pm}0.71$ and $19.25{\pm}1.41mg$ QE/g, espectively. The general nutrients and other antioxidant bioactive materials in Wasabi japonica Matsum leaves were also potential materials for good health food.

• Korean Journal of Environment and Ecology
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• v.30 no.1
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• pp.98-103
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• 2016

Pyropia yezoensis were sampled from Jeonnam in Korea, Jiansu in China and Saga in Japan. Sampled P. yezoensis were analyzed proximate composition by Association official Analytical Chemists(AOAC) method, minerals by ICP-OES and amino acid by amino acid analyzer. Three areas resulted that contents of moisture and crude protein were $8.13{\pm}0.38%$ and $37.25{\pm}1.15%$, and crude lipid, ash and carbohydrate were $2.12{\pm}0.27%$, $7.41{\pm}0.36%$ and $45.06{\pm}1.30%$ respectively. In total minerals, Korea and China were $28300.19{\pm}76.39ppm$and $13945.63{\pm}7.73ppm$, and Japan was $12262.485{\pm}4.38ppm$. Amino acids, Korea and China were $265.28{\pm}0.38mg\;g^{-1}$ and $209.19{\pm}0.19mg\;g^{-1}$, and Japan was $157.61{\pm}0.43mg\;g^{-1}$. Therefore, those substance contents of P. yezoensis are significantly different between cultivation sites. The basic data may used to the environmental and nutritional study of P. yezoensis based on country sites.

• The Korea Journal of Herbology
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• v.30 no.4
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• pp.51-55
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• 2015

Objectives : The purpose of this study was finding out the daily dose of Aconiti Lateralis Radix Preparata and Aconiti Lateralis Radix in Treatise on Cold Damage Diseases.Methods : In order to estimate the daily dose of Aconiti Lateralis Radix Preparata and Aconiti Lateralis Radix, I researched Treatise on Cold Damage Diseases, Synopsis of Prescription of the Golden Chamber, Korean Pharmacoepia 10 and Science of Contemporary Chinese Medicine Product.Results : Daily doses of Aconiti Lateralis Radix Preparata are 1, 2, or 3 pieces and those amount are respectively 1, 2, or 3 Ryang. Common dose of Aconiti Lateralis Radix Preparata is 1 piece, Maximum Dose of it is 3 Pieces and that corresponds with dose of dried herb in Treatise on Cold Damage Diseases. Consider from Sovereign, Minister, Assistant and Courier, the dose of it in Buja-tang and Whyunmu-tang is 3 Ryang. 1 Ryang corresponds with 6.5 g. Aconiti Lateralis Radix is dried without baking so its weight is equal to Aconiti Lateralis Radix Preparata. Daily doses of Aconiti Lateralis Radix are 1 piece or 1 big piece and those amount are respectively 3 or 6 Ryang. Common dose of it is 1 piece.Conclusions : From this study, in Treatise on Cold Damage Diseases, Daily Doses of Aconiti Lateralis Radix Preparata are 1, 2, or 3 pieces(19.5 g, 39 g or 52 g), and that of Aconiti Lateralis Radix are 1 piece or 1 big piece(19.5 g, 39 g). Common Dose of two Herbal Medicine is 19.5 g.

• The Korea Journal of Herbology
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• v.32 no.6
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• pp.17-22
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• 2017

Objectives : Daily Dose of Apricot Kernel in Treatise on Cold Damage Diseases is usually written in the number, sometimes in the volume. The seed coat and acute end of Apricot Kernel must be removed, so author want to know its daily dose and proportion of seed coat and acute end. Methods : Assuming dosage by editions of Treatise on Cold Damage Diseases. And comparing it with measured weight of Apricot Kernel distributed in market. Results : The number of prescriptions including Apricot Kernel is ten, and eight of that are made to decoction, two of that are made to pill prescription. And two of decoction are made by reducing and uniting prescriptions. The daily dose of six decoction are 70, 47 or 35 in numbers. The 70 Apricot Kernel except seed coat and acute end are 1/2 Sheong ($33m{\ell}$) in volume, 3 Ryang (19.5 g) in weight. Weight of Apricot Kernel the most common in market is 0.28 ~ 0.38 g. 70 Apricot Kernel are 23.10 g, seed coats of that are 1.15 g, acute ends of that are 2.43 g, 70 Apricot Kernel except seed coat and acute end is 19.5 g. So, seed coat is 5%, acute end is 10% by proportion, which is the same with it assumed based on writings. Conclusions : 70 Apricot Kernel except seed coat and acute end are 1/2 Sheong, 3 Ryang, and it is 33 mL and 19.5 g respectively. It also correspond with current market goods.

• Journal of Environmental Science International
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• v.26 no.1
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• pp.29-36
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• 2017

Aerosol mass size distributions were investigated at 865 m high the of Jirisan national park. A nanosampler cascade impactor was used to collect aerosols. The atmospheric aerosol particles had a unimodal mass size distribution, which peaked at $0.5-1.0{\mu}m$, and a mass aerodynamic diameter of $1.13{\mu}m$. The annual average concentrations of TSP, $PM_{10}$, $PM_{2.5}$, $PM_1$, $PM_{0.5}$ and $PM_{0.1}$ were $20.9{\mu}g/m^3$, $19.3{\mu}g/m^3$, $14.9{\mu}g/m^3$, $10.7{\mu}g/m^3$, $5.3{\mu}g/m^3$, $1.2{\mu}g/m^3$, respectively. TSP concentrations were below $30{\mu}g/m^3$ during the sampling period. On average $PM_{10}$, $PM_{2.5}$, $PM_1$, $PM_{0.5}$ and $PM_{0.1}$ made up 0.91, 0.70, 0.41, 0.19 and 0.07 of TSP, respectively. The annual average of PM2.5/PM10 ratio was 0.77.