http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이학성,Lee, Hak-Seong 대한전기협회 2006 전기저널 Vol.358 No.-
국내 중전기기 및 신재생 에너지부분 관련업체들의 향후 제품 및 기술개발 방향 설정에 참고로 활용되길 기대하면서 2006년 4월 및 8월 개최되었던 중전기기 및 신재생 에너지관련 대표적인 전시회 참관 보고서들을 요약하여 동 분야 기술 및 시장 동향들을 소개하고자 합니다. 아울러 여러 보고서 내용들을 요약 정리하는 과정에서 집필자의 주관적인 견해나 편견이 다소 작용할 수 있다는 점도 미리 지적해두고자 합니다.
Ti-Ni-Hf 고온형상기억합금의 미세조직 및 고온특성에 미치는 합금 조성의 영향
최성우 ( Seong Woo Choi ),이학성 ( Hak Sung Lee ),전영민 ( Yeong Min Jeon ),남태현 ( Tae Hyun Nam ),염종택 ( Jong Taek Yeom ),김성웅 ( Seong Woong Kim ),박찬희 ( Chan Hee Park ),홍재근 ( Jae Keun Hong ),오창석 ( Chang Seok Oh ) 대한금속재료학회(구 대한금속학회) 2015 대한금속·재료학회지 Vol.53 No.3
The effect of Ni and Hf content on the microstructure, phase transformation, and hot workability of Ti-Ni-Hf high-temperature shape memory alloys (SMAs) were investigated. Twelve different Ti-xNi (x=49, 50.2, 50.5, 50.8 at%)-yHf (y=10, 12, 14 at%) SMA ingots were prepared by vacuum arc re-melting, and then analyzed by SEM, DSC, TEM, and XRD after heat treatment. Precipitation behavior was mostly dependent on Ni content rather than Hf content. The effect of homogenization treatment on the particle precipitation and phase transformation behavior was studied. We also found that hot workability was greatly dependent on the solidification structure of the austenite phase. (Received March 2, 2014)
김성은(Seong-Eun Kim),백신화(Sinhwa Baek),이학성(Hak Sung Lee),김현규(Hyun-Kyu Kim) 한국식품영양과학회 2018 한국식품영양과학회지 Vol.47 No.7
본 연구는 Lactobacillus plantarum을 이용하여 발효시킨 흑무 유산균 발효물의 간 손상 보호 효과를 알아보기 위해 기초적인 항산화 효능 및 간세포 지방구 형성 억제 활성 실험을 하였다. 흑무 유산균 발효물은 단순 추출물 및 발효 전 단계의 영양원과 비교하여 유의적으로 증진된 항산화 효능을 보였으며, 총 폴리페놀 함량 및 총 플라보노이드 함량 역시 발효를 통해 증가한 것을 확인하였다. 또한, 간 손상 유발 시 간세포에 형성되는 지방구의 형성 억제를 통한 간세포 보호 효능도 단순 추출물 및 발효 전 단계 영양원과 대비하여 유의적으로 증가한 것을 확인하였다. 이상의 결과를 통해 흑무 유산균 발효물은 종전의 흑무 추출물과 대비하여 손상에 의한 간세포의 지방구 형성 억제 효능이 증진되었으며 이를 토대로 유산균 발효 흑무는 간 건강 개선을 위한 건강기능식품 소재로써 활용될 수 있는 가능성을 확인하였다. Black radish (Raphanus sativus var. niger) has been reported to have anti-oxidant, anti-inflammatory and detoxification effects. In this study, we investigated the antioxidant and lipid accumulation inhibitory effects of fermented black radish (FBR) with Lactobacillus plantarum compared with non-fermented black radish (BR) and black radish extracts obtained using water, and 30%, 50%, 70% ethyl alcohol. The lipid accumulation inhibitory effect was determined by Oil-Red O staining activity after oleic acid treatment of HepG2 cells. Treatment with FBR at doses of 100 and 500 μg/mL inhibited lipid accumulation by 103% and 108% and BR at the same dose inhibited lipid accumulation by 72% and 61%, respectively. Extracts inhibited lipid accumulation ranging by 17% to 93% when applied in the same doses. FBR led to significant inhibition of lipid accumulation compared with BR and extracts. In addition, FBR demonstrated antioxidant effect such as scavenging activity of (2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and 2,2-diphenyl-1-picrylhydrazyl radical and super oxide dismutase (SOD)-like activity. Also the FBR was measured total polyphenol contents (TPC) and total flavonoid contents (TFC). Moreover, FBR showed significant greater antioxidant activity than BR and extracts. The TPC of FBR increased more than BR and the TFC of FBR was higher than that of other extracts. These results suggest that FBR might be a potential health functional food ingredient for enhancing liver function.
토요 이토 건축의 그리드와 공간 구성 변화에 대한 연구
김재섭(Kim, Jae-Seob),이학성(Lee, Hak-Seong),정태종(Jeong, Tae-Jong),안대환(An, Dai-Whan) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.1
Toyo Ito is a Japanese architect who trying to overcome the limitation of modern architecture in architectural design. He has constantly reflected the questions about the classical grid system and has proposed a new grid system ‘Emerging Grid’ that transformation of existing grid system on his projects. The purpose of this study is to analyze the ‘Emerging Grid’ reflecting on each project and to find out the effect of the ‘Emerging Grid’ on spatial composition. Analysis is conducted on 8 projects -Sendai Mediatheque, Serpentine Gallery Pavilion, Tama Art University Library, National Taiwan University College of Social Sciences, National Taichung Theater, Akayama Historic Nature Park Information Center, New Deichman Library in Oslo, Berkeley Art Museum and Pacific Film Archive- of Toyo Ito’s design works. The results of this study are as followed; First of all, Toyo Ito’s ‘Emerging Grid’ forms a new grid system and spatial composition with horizontal and vertical directional changes in the grid. Secondly, Toyo Ito develops integration of space, structure, skin and the interdependence of architectural elements using the new grid system. Lastly, horizontal and vertical changes of ‘Emerging Grid’ are accompanied within the limits of the established structural system, thus create the new types and patterns in contemporary architecture.
고지방식이(HFD)/stereptozotocin(STZ) 유도 당뇨모델에서 여주가 글루카곤 분비에 미치는 영향
김성은,김상백,김슬기,김현규,박병준,이학성,Kim, Seong-Eun,Kim, Sang-Back,Kim, Seul Ki,Kim, Hyun-Kyu,Park, Byoungjun,Lee, Hak Sung 한국환경과학회 2020 한국환경과학회지 Vol.29 No.8
In present study, we investigated the antidiabetic effect of Momordica charantia(as well known "bitter melon"). This study was conducted to determine antidiabetic mechanism of Bitter Melon Extract (BME). We measured blood glucose, insulin, glucagon level in a Sprague-Dawley rat model of high-fat diet/streptozotocin(HFD/STZ)-induced diabetes. Five experimental groups were used: normal, HFD/STZ, BME 62.5 mg/kg HFD/STZ, BME 125 mg/kg HFD/STZ and BME 250 mg/kg HFD/STZ. BME was orally administered to the rats every other day for 9 weeks. Results showed that fasting blood glucose levels were significantly lower in the BME 125 mg/kg(150.17 ± 20.22 mg/dL) and 250 mg/kg(124.17 ± 22.17 mg/dL) groups than in the vehicle group(188.83 ± 26.63 mg/dL)(p<0.05). In addition, glucagon levels were lower in the three BME treatment groups than in the vehicle group(p<0.05). Oral glucose tolerance tests revealed that the BME 250 mg/kg group had significantly(p<0.05) reduced 120-minute blood glucose levels and areas under the curve. Our results suggest that BME induces antidiabetic effects via the reduction of glucagon and blood glucose levels.