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섬모시풀(Boehmeria nivea var. nipononivea) 추출물의 항산화, 항균 및 항염증 효과에 대한 연구
정기수 ( Gi Soo Jung ),이선희 ( Sun Hee Lee ),양수경 ( Soo-kyung Yang ),문성필 ( Sung Pil Moon ),송관필 ( Gwanpil Song ),김지영 ( Ji Young Kim ) 대한화장품학회 2020 대한화장품학회지 Vol.46 No.4
본 연구는 섬모시풀 70% 에탄올 추출물과 분획물에 대한 천연 화장품 소재의 가능성에 대해 조사하였다. 섬모시풀을 70% 에탄올 추출물과 헥산, 디클로로메탄, 에틸아세테이트, 부탄올 등의 순차적으로 용매별 분획을 제작하였다. DPPH과 ABTS 시험결과, 에틸아세테이트 분획물은 우수한 라디칼 소거 활성을 보였다. 항균활성은 Staphylococcus aureus, Staphylococcus epidermidis, Cutibacterium acnes와 항생제내성균주에 대해서 paper disc 방법, 최소저해농도 및 생육억제율을 조사하였다. 그 결과, S. aureus, S. epidermidis, C. acnes 균주에 디클로로메탄과 에틸아세테이트 분획물에서 추출물과 다른 분획물에 비해 우수한 항균력을 확인하였다. 또한, 에틸아세테이트 분획물은 lipopolysaccharide (LPS) 처리한 RAW 264.7 Cell에서 NO 생성억제 활성을 확인하였다. 이로써 섬모시풀 추출물과 분획물은 세포독성이 없으며, 항산화, 항균 및 항염 효과를 보였다. 이 결과는 섬모시풀 추출물과 분획물이 항산화 활성을 가지는 효과적인 화장품 소재로 적용 가능하다는 것을 시사한다. The purpose of this study was to investigate the possible use of the Boehmeria nivea var. nipononivea extract and fractions for the development of natural cosmetic ingredients. The leaves of B. nivea var. nipononivea, extracted by 70% ethanol, were sequentially fractionated with n-hexane, dichloromethane, ethylacetate, and n-butanol. As a result of DPPH and ABTS test, ethyl acetate fractionation was shown to be excellent in radical scavenging activity. For the antimicrobial activities against Staphylococcus aureus, Staphylococcus epidermidis, Cutibacterium acnes and antibiotic resistant strains, MIC and birth control rate were observed by paper disc method. In the antibacterial activity by the disc diffusion assay against S. aureus, S. epidermidis and C. acnes, the dichloromethane and ethylacetate fraction showed stronger antibacterial activity than the other fractions and extract. Moreover, the ethylacetate fraction showed strong nitric oxide (NO) production inhibitory effect in lipopolysaccharide (LPS)-stimulated RAW 264.7 cell. In conclusion, we found that B. nivea var. nipononivea extract was not cytotoxic and showed antioxidant, antimicrobial and anti-inflammatory effects. These results suggest that the Boehmeria nivea var. nipononivea extract and fractions could be applied as an effective cosmetic material with antioxidant activity.
PVDF를 이용한 맥박 및 호흡 센서와 디지털 실을 이용한 헬스케어 의류 시스템
김정도(Jeong-Do Kim),박성대(Sung-Dae Park),이정환(Jung-Hwan Lee),김정주(Jung-Ju Kim),안진호(Jin-Ho Ahn),정기수(Gi-Soo Chung),이상국(Sang-Goog Lee) 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.3
The present healthcare garments have constraints of washing and design, because of interface between sensors and drive circuits. To solve these problems, we transmit signals measured by sensors to station by using digital yarn. Station can easily be connected to garment by integrating sensor driving circuit, battery and control circuits. Digital yarn of 10um allow of well-designed clothes without restricting washing. To prove usefulness of a proposed healthcare garment system, we designed pulse and respiratory sensor using PVDF film and make the networked garment from digital yarn. Through experiment, we proved that the pulse and respiratory signal transmitted by digital yarn have no attenuation and noise