• Korean Journal of Food Science and Technology
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• v.30 no.2
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• pp.266-271
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• 1998

In order to find a novel antioxidant source from nature, the comparison of antioxidative activity was carried out through the CDM(conductometric determination method) with various crude drugs on palm oil, lard and soybean oil. After the preliminary experiment, we concluded that the turmeric (Curcumae Rhizoma) ethanol extract has the strongest antioxidative activity among the ten crude drugs. In case of over 0.05% of concentration turmeric ethanol extract, it has more activity than others athough the turmeric ethanol extract has similar antioxidative activity to tocopherol and rosemary extract up to 0.05% of concentration. The turmeric ethanol extract of 0.01% was more effective in lard (AI=4.59) than in palm oil (AI=1.57) and ineffective in soybean oil. When turmeric ethanol extract was added to various kind of fatty acid methyl esters at 0.05% and 0.1% respectively, the antioxidative index(AI) on oleic acid methyl ester was greatly increased, whereas the antioxidative index on linoleic acid methyl ester was decreased.

• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.11
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• pp.1327-1335
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• 2017

This study was carried out to determine the effect of cacao bean addition on the physicochemical properties of extruded rice flour. Rice-based cacao beans (0, 20, 40, 60%) were extruded at a die temperature of $130^{\circ}C$, screw speed of 200 rpm, and moisture content of 25%. As the content of cacao beans increased from 20% to 60%, expansion index decreased, while piece density and specific length increased. The water soluble index and water absorption index of the extrudate increased through extrusion cooking. Lightness decreased as cacao bean content increased while redness increased. As the content of cacao beans increased, paste viscosity decreased. Cold peak viscosity was observed in all extrudates of raw roasted cacao beans. ${\alpha},{\alpha}$-Diphenyl-${\beta}$-picrylhydrazyl (DPPH) radical-scavenging activity increased upon extrusion and cacao bean addition. As content of cacao beans increased, non-roasted cacao beans had higher total phenolic contents than roasted cacao beans. This study showed that addition of cacao beans to extruded rice snack improved antioxidant activity.

• Korean Journal of Food Science and Technology
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• v.31 no.3
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• pp.855-863
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• 1999

To develop new natural antioxidants, antioxidative activity of ethanol (75%) extracts from 50 edible or medicinal plants were examined on lard and palm oil by Rancimat method ($120^{\circ}C$, 20 L/hr). The extracts from Rhus verviciflua STOKES showed comparatively strong antioxidative activity on test. Of the solvents used for extraction, chloroform extract exhibited the strongest antioxidant activity. AI (antioxidant index: induction period of oil containing extract/induction period of control oil) of chloroform extract was higher than that of commercial antioxidant, such as BHT, BHA and ${\delta}-tocopherol$. Free phenolic acid fraction (200 ppm) of the chloroform extract from 75% EtOH extract of Rhus verniciflua STOKES (RCF) showed stronger activity than that of BHT, BHA, and ${\delta}-tocopherol$ at the same concentration. RCF-11 and RCF-13 fractions separated by silicagel column chromatography from the RCF showed stronger activity than other fractions by the Rancimat method.

• Food Science of Animal Resources
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• v.37 no.4
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• pp.542-551
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• 2017

The quality characteristics of velvet antlers obtained from Formosan sambar deer (Cervus unicolor Swinhoi) (SDVA), harvested from 63 to 81 d during the velvet antler growth period, were evaluated by investigating the relationships between antioxidant levels; including content, activity, and content/activity ratios, and physical properties; including shear force values, color, and Ca content. The hardness of samples from base velvet antler sections increased, and that the color of these samples tended to become reddish-yellow (redder and more yellow), suggesting that the Ca content in the base section of the sample was not ossified yet. Samples from the upper sections of velvet antler showed higher superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPX) content (3.91 to 1.50 mg/mL, 2.53 to 0.90 mg/mL, and 3.95 to 1.58 mg/mL, respectively) than did samples from the middle and base sections (p<0.05). The activity and content/activity ratios of GPX measured in the upper section were also found to be significantly greater than in the middle and base sections (p<0.05). We further observed that the content and activity of GPX was significantly and negatively correlated with Ca content, shear force values, and the content/activity ratio of this antioxidant (p<0.01). The study findings may serve as a reference index for quality evaluations of velvet antlers of Formosan sambar deer in future.

• Korean Journal of Pharmacognosy
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• v.42 no.1
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• pp.54-60
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• 2011

In an attempt to find the activity of Aster glehni (Compositae) leaves on the obesity in vivo, 30% ethanolic extract rich in caffeoylquinic acids was orally treated with 100 and 200 mg/kg for consecutive four weeks during feeding high-fat diet in rats for 6 weeks. This extract prevented the increase of atherogenic index and body weight and oxidative stress from dietinduced obese rats probably due to the pharmacological mechanism of the CQ complex.

• Proceedings of the KSRS Conference
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• v.2
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• pp.563-566
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• 2006

In order for the evaluation and analysis of the spring drought which has been periodically occurring in Korean peninsula since 2000, the use of satellite image data is increasing to investigate temporal and spatial characteristics of the drought areas. The recent spring droughts in south Korea have some characteristics. It last for short period in spring when the activity of vegetation is not lively and it have large areal deviation in the severity of drought. In this study, considering the characteristics of the spring drought in Korean peninsular, the MODIS satellite image data which has superior spatial and radiometric resolutions was used for the analysis of the spring drought. In two basins having different spatial characteristics, the drought events were selected and their severities were analyzed using the MODIS NDVI, LSWI, and daily rainfall data since 2000, and the spatial characteristics of the drought area were analyzed using the DEM, land cover, and digital forest map of the study areas.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2016.11a
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• pp.314-315
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• 2016

본 논문에서는 한정된 자원으로 선택과 집중을 통한 국민안전처(구 소방방재청) 연구개발 사업의 효율성을 증대하기 위한 종합발전계획 수립을 위한 선행 조사로서 주요 특허분석 지표인 특허활동지수(AI), 인용도 지수(CPP), 영향력 지수(PII), 기술력 지수(TS), 시장 확보 지수(PFS) 등을 이용하여 미국, 일본, 중국, 유럽과 우리나라의 재난 안전 분야 특허 동향을 비교 분석하였다. 분석 결과 주요 5개국의 재난 안전 분야 기술 성숙 단계를 보면 한국과 중국은 발전기, 미국은 성숙기의 기술성장 단계를 보이며, 유럽과 일본은 답보 상태 기술수준 단계라고 판단할 수 있었다. 기술 분류별 특허출원 현황을 분석한 결과 예방 대비 기술 분야가 출원된 특허 중 36%로 가장 높은 비중을 보이고 있으며, 예측 기술 분야는 29%로 두 번째로 높은 비중을 보이고 있었다. 우리나라는 특허 점유율 및 특허 영향력 부분에서 주요 5개국 중 4위로 나타났다.

• Journal of Korea Technology Innovation Society
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• v.7 no.3
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• pp.681-709
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• 2004

The purpose of this study is to classify customers by e-mail responsiveness on time-series analysis and testify the effectiveness of grouping by ROI analysis. Response recency, response frequency and Activity(RFA) of e-mailing systems are adapted for Customer segmentations. ROI analysis are consisted of open, click-through, duration time, personalization, conversion rate and email loyalty index of email systems. Major findings are as follows: RFA analysis is used for customer segmentations that is fundamental process of e-CRM applications. Customers can be grouped into loyal customers, odds customers, dormant customers, secession customers, and observation customers by RFA grouping. Loyal customer group has high point in all ROI index compared to other groups. These results indicated that customer responsiveness of e-mail systems were appropriate methods to group the customer with demographic variables. Therefore, effective e-mail marketing strategy of e-Biz should have suitable active DB and Behavior targeting is best approach to enforce the target e-mail marketing.

• Journal of The Korean Astronomical Society
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• v.46 no.5
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• pp.191-200
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• 2013

Full-disk solar images are provided by many solar telescopes around the world. However, the observed images show Non-Radial Variation (NRV) over the disk. In this paper, we propose algorithms for detecting distortions and restoring these images. For detecting NRV, the cross-correlation coefficients matrix of radial profiles is calculated and the minimum value in the matrix is defined as the Index of Non-radial Variation (INV). This index has been utilized to evaluate the H images of GONG, and systemic variations of different instruments are obtained. For obtaining the NRV's image, a Multi-level Morphological Filter (MMF) is designed to eliminate structures produced by solar activities over the solar surface. Comparing with the median filter, the proposed filter is a better choice. The experimental results show that the effect of our automatic detection and restoration methods is significant for getting a flat and high contrast full-disk image. For investigating the effect of our method on solar features, structural similarity (SSIM) index is utilized. The high SSIM indices (close to 1) of solar features show that the details of the structures remain after NRV restoring.

• Korean Journal of Food Science and Technology
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• v.28 no.1
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• pp.77-82
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• 1996

Antioxidative activity of the extract from Caesalpinia sappan L. by various solvent was compared with several commercial antioxidants, using the Rancimat method. AI (antioxidative index; induction period of oil containing extract/induction period of control oil) of all extracts were higher than commercial antioxidants, such as BHA, ${\delta}-tocopherol$ and ascorbic acid. The ethanol extract was fractionated by liquid liquid extraction. Ethyl acetate fraction showed higher AI than the whole crude extract. When comparing POV and TBA value of palm oil and lard containing different level of each fraction, the oxidative stability of ethyl acetate fraction at 200 ppm level on palm oil and lard were similar to that of BHT at 200 ppm level, and better than BHA, ${\delta}-tocopherol$ and control.