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목화(Gossypium arboreum L.) 에탄올추출물의 항산화 활성에 관한 연구
강태경,이양숙,김남우,서수정 대한미용학회 2019 대한미용학회지 Vol.15 No.2
The purpose of the current study was to find physiological activities of extracts from peels of cotton ball, leaves and seeds of Gossypium arboreum using ethanol as solvent. A high amount of reducing sugar was found to be present in the leaf and cotton ball peel extracts, viz. 103.94 mg/g and 101.22 mg/g, respectively. The content of total polyphenol and flavonoid compounds was the highest in the leaf extract, i.e. 72.62 mg/g and 34.51 mg/g, respectively. Furthermore, 92% DPPH radical scavenging activity was observed in the leafextract for concentration of 1,000 μg/ mL. In addition, 94.2% ABTS radical scavenging activity, which was the highest, was observed in the leaf extract, followed by 84.78% in the cotton ball peel extract at 1,000 μg/mL. The results of SOD-like activity and xanthine oxidase inhibition activity showed the highest effect of 44.79% and 84.91% for the leaf extract, respectively at concentration 1,000 μg/mL. The highest tyrosinase inhibition effect of 42.50% was found in the cotton ball peel extract, whereas elastase inhibition activity showed the highest effect of 44.14% for the leaf extract at concentration 1,000 μg/mL. These results indicated that the extracts from leaves, cotton ballpeels and seeds of G. arboreumwith ethanol as a solvent have a large amount of polyphenol
강태경,이시복 한국ITS학회 2018 한국ITS학회논문지 Vol.17 No.6
This study focuses on utilizing drones for performance evaluation of ITS detectors and analyzing economic feasibility when performance evaluation is conducted by the traffic management center’s own personnel using drones. The study sites were selected from DSRC, video detector, and radar detector locations and drone filming was conducted to obtain travel speed, queue length, and delay time and compare with the detector data. It was shown that drones can be very effectively used to evaluate performance of major ITS detectors such as DSRC and video detectors. In addition, it was analyzed that a drone operated by the traffic management center’s own personnel provides very economic solution for ITS detector performance evaluation when compared to consignment by external agencies. 본 연구는 최근 활용도가 급속히 확대되고 있는 드론을 활용한 ITS 검지기 성능평가 방안을부산광역시의 사례를 중심으로 제시하고. 드론을 활용하여 센터 자체적으로 성능평가를 시행할 경우의 경제성에 대해 분석하고자 하였다. 부산시에서 운영중인 DSRC, 영상검지기, 레이더검지기 설치지점 중 분석대상 지점을 선정하여 드론촬영을 실시하고, 영상분석을 통해 통행속도, 대기행렬, 지체시간 등의 데이터를 확보하여 검지기수집 데이터와 비교하였다. 비교분석 결과, DSRC, 영상검지기 등 대다수의 주요 검지기 성능평가에 드론활용이 가능하다는 것을충분히 확인하였으며, 실제로 현장의 상당수 검지기의 성능개선이 필요하다 사실도 손쉽게 파악할 수 있었다. 또한, 센터 자체인력으로 성능평가 수행시 외부기관 위탁시와 비교하여 절반이하의 비용이 소요되어 비용과 시간 측면에서 매우 경제성이 높은 것으로 분석되었다.
강태경,강태환,이채식,전현종,최덕규,박석호,김혁주 한국농업기계학회 2012 바이오시스템공학 Vol.36 No.6
Damage to agricultural production caused by insects and diseases affects farming yields. The orchard sprayer is mainly used in the country to protect the fruit in a large area, with less effort and at minimum cost. The excellent performance of the air blast spray increases the fruit protection. Chemical application in orchards has been accomplished by the orchard sprayers with air assist nozzles and a axial fan in Korea. However, the orchard sprayers without ROPS resulted in severe injury or death when operators drive the sprayers improperly on hilly orchard or farming road. This study was to develop a ROPS for the orchard sprayers improving farmer’s safety. In this study, the accident case was used in analysing the design and building TOP structure of the orchard sprayer. The maximum impact, body torsion frame structures including the driver's protection are also analysed for adherence to safety regulations. The ROPS safety regulations according to the strength test results were established.