해조류 메탄올 추출물의 Prolyl Endopeptidase, Tyrosinase 저해 및 항응고 활성 스크리닝

이현진,김진희,이주현,김종식,곽상태,이경복,송경식,최병욱,이봉호,Lee, Hyun-Jin,Kim, Jin-Hui,Lee, Chu-Hyun,Kim, Jong-Sik,Kwak, Sang-Tae,Lee, Kyung-Bok,Song, Kyung-Sik,Choi, Byung-Wook,Lee, Bong-Ho 한국생약학회 1999 생약학회지 Vol.30 No.3

About forty sea weeds were screened for their inhibitory effects against prolyl endopeptidase, tyrosinase and thrombus coagulation. Out of them, methanolic extract of Ecklonia cava, Sargassum patens, Sargassum hemiphyllum, Sargassum thunbergii, Sargassum singgildianum, Hizikia fusiformis, and Ishige okamurae inhibited more than 90% of prolyl endopeptidase activity at 40 ppm. Sargassum siliquastrum and Ecklonia cava exhibited 51% and 76% of inhibitory activity against tyrosinase at 40 ppm, respectively. In APTT assay system, Sargassum singgildianum, Pterocladia capilacea and Hizikia fusiformis delayed coagulation of thrombus about two times (210, 211, and 198% over control at ca 367 ppm, respectively) and in TT assay, Lomentaria catenata, Laurencia okamurae, and Hizikia fusiformis did most effectively (216,197, and 251% at ca 367 ppm, respectively).

광대역 다중공진 평판 안테나 설계 및 구현

이현진,박성일,임영석,Lee, Hyeon-Jin,Park, Seong-Il,Lim, Yeong-Seog 대한전자공학회 2005 電子工學會論文誌-TC (Telecommunications) Vol.42 No.12

This study designed and fabricated a multi-purpose planar antenna for base stations that are accessible to DCS, WiBro, and ISM. The proposed antenna was designed into an open loop form from the existing monopole structure. The capacitance of the multi-purpose antenna was increased by the coupling of open parts. This makes the use of MMIC and LTCC convenient and the antenna is smaller and has a larger gain than existing antennas. The resonance distance and bandwidth can be adjusted by changing the open gap and the height of the loop of the antenna. The bandwidth of the designed antenna satisfies DCS, IMT-2000, WiBro, Bluetooth, wireless LAN and ISM bands based on VSWR 2. The entire frequency bandwidth is $58.75\%$ of $1.575GHz\~2.985GHz(1.41GHz)$. Also, the radiation pattern of the antenna displayed co-polarization and cross-polarization characteristics at 1.6GHz, 2.3GHz and 2.8GHz. 본 논문에서는 DCS와 WiBro 및 ISM 수용이 가능한 기지국용 광대역 다중공진 평판 안테나를 설계 및 제작하였다. 제안한 안테나는 기존의 모노폴 구조를 개방 루프 형태(폴디드 형태)로 수정하여 개방 부분의 결합에 의한 캐패시턴스를 증가시킨 광대역 다중공진 안테나를 설계하였다. 제안된 안테나는 도파관 급전 방법의 인쇄형 평판 안테나로 단일 층으로 구현되어 MMIC 및 LTCC의 이용이 용이하며 기존의 안테나보다 크기가 작고 높은 이득을 갖는다. 안테나 구조의 개방 부분의 간격과 루프 형태의 높이를 조절하여 공진 거리 및 대역폭을 조절 할 수 있다. 설계한 안테나의 대역폭은 정재파비 2 이하를 기준으로 DCS와 WiBro 및 ISM대역을 모두 충족하였으며 전체의 대역폭은 $1.575GHz\~2.985GHz(1.41GHz)$의 $58.75\%$의 주파수 대역폭을 얻었다. 또한, 안테나의 방사패턴은 1.6GHz, 2.3GHz, 2.8GHz에서의 Co-Polarization과 Cross-Polarization의 특성을 측정하였다.

응집된 Y₂O₃:Eu Red 형광체의 나노분산 및 나노졸의 형광특성

이현진,반세민,정경열,최병기,강광중,김대성,Lee, Hyun Jin,Ban, Se Min,Jung, Kyeong-Youl,Choi, Byung-Ki,Kang, Kwang-Jung,Kim, Dae Sung 한국재료학회 2017 한국재료학회지 Vol.27 No.2

Nanosized and aggregated $Y_2O_3:Eu$ Red phosphors were prepared by template method from metal salt impregnated into crystalline cellulose. The particle size and photoluminescent property of $Y_2O_3:Eu$ red phosphors were controlled by variation of the calcination temperature and time. Dispersed nanosol was also obtained from the aggregated $Y_2O_3:Eu$ Red phosphor under bead mill wet process. The dispersion property of the $Y_2O_3:Eu$ nanosol was optimized by controlling the bead size, bead content ratio and milling time. The median particle size ($D_{50}$) of $Y_2O_3:Eu$ nanosol was found to be around 100 nm, and to be below 90 nm after centrifuging. In spite of the low photoluminescent properties of $Y_2O_3:Eu$ nanosol, it was observed that the photoluminescent property recovered after re-calcination. The dispersion and photoluminescent properties of $Y_2O_3:Eu$ nanosol were investigated using a particle size analyzer, FE-SEM, and a fluorescence spectrometer.

파트릭 로제 쇼콜라티에

이현진,Lee, Hyeon-Jin 대한제과협회 2003 베이커리 Vol.4 No.-

태양열 발전에 대한 IEA의 활동 및 전망

이현진,김종규,강용혁,Lee, Hyunjin,Kim, Jongkyu,Kang, YongHeack 한국교통대학교 융복합기술연구소 2012 융ㆍ복합기술연구소 논문집 Vol.2 No.1

1) 국제에너지위원회 IEA 산하 SolarPACES(Solar Thermal Power and Chemistry Energy System)는 태양열발전 및 화학 관련한 기술 개발 및 보급을 목표로 한국을 포함하여 현재 20개국이 활동 중이다. 2011년 우리나라는 집행위원회뿐만 아니라 6개 기술 분야 중에 태양열발전, 태양열화학, 태양열집광기술 및 적용 3개 분야에 참여하고 있다. 2) 2011년 기준으로 약 1.2GW 용량의 태양열 발전소가 전 세계에 설치되었고, 스페인 582MW, 미국 507MW로 대부분을 차지한다. 현재 미국 8GW, 스페인 4.46GW, 중국 2.5GW를 포함하여 전체 약 17GW 용량 발전소들이 건설 또는 계획 중에 있다. 3) 국제에너지위원회 IEA는 태양열 발전소는 태양광에 비해 약 1/3정도의 발전 용량을 갖겠지만, 열저장을 이용한 높은 가동시간을 바탕으로 2050년에는 태양광이나 바이오매스와 비슷한 수준으로 전기를 공급하여 전 세계 전기의 11.3% 정도에 이를 것으로 예측하고 있다. Concentrated Solar Power (CSP) is a renewable energy to generate electricity by using solar thermal energy as a heat source to drive turbines or engines for thermodynamic cycles. This paper introduces ongoing projects in SolarPACES(Solar Power and Chemical Energy systems) under the REWP(Renewable Energy Working Party) in the IEA(International Energy Agency). Then, the current status of international CSP markets and domestic activities is summarized. Finally, the CSP outlook by IEA and the key technological challenges to be overcome for its realization are presented.

프레이리(Freire) 교육론이 중등학교 가정과교육에 주는 시사점 및 실천방안

이현진,채정현,Lee, Hyun-Jin,Chae, Jung Hyun 대한가정학회 2022 Human Ecology Research(HER) Vol.60 No.3

The purpose of this study was to explore the implications of Freire's education theory for secondary school Home Economics Education (HEedu). We conducted a review of books written by Freire and classified the characteristics of his education theory into 9 categories. Based on these categories, we concretely explored the forms in which Freire's education theory could be applied in this area of education through interviews with Home Economics (HE) teachers. We also searched for activities that can be carried out by HEedu agents and the support that can be given by social institutions. The implications of Freire's education theory for HEedu are that education should exhibit love and respect for human beings, be ethically and democratically responsible, enable people to dream as well as hope, support consciousness and praxis by reflection, stimulate epistemological curiosity in learners' lives and experiences, promote subjectivity, autonomy and self-reliance, engage in dialogue to bring about a change in relationships rather than viewing dialogue as a skill, and stimulate political engagement. Freire's education theory therefore has multiple implications for the purpose, mission, and content of education, teaching methods and perspectives, and directions regarding the role of HE teachers. The results are expected to provide practical assistance in developing a persuasive curriculum for HEedu that can help learners restore subjectivity and love for human beings and their society by expanding the horizons of HEedu philosophy from the critical science of Habermas to Freire's education theory.

미생물 유래 항당뇨 소재 및 발효식품 개발 현황

이현진,차인태,서명지,Lee, Hyunjin,Cha, In-Tae,Seo, Myung-Ji 한국식품영양과학회 2014 식품산업과 영양 Vol.19 No.2

측면 연마 광섬유를 이용한 용액의 광학 특성 측정

이현진,김광택,Lee, Hyeon Jin,Kim, Kwang Taek 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.3

In this paper, a measurement method to obtain the optical properties of a liquid base on a side-polished single mode fiber was proposed and demonstrated. The device showed periodic resonance coupling against wavelengths. The refractive index and dispersion characteristics of a liquid were calculated by use of the spacings of periodic resonance wavelengths of the device. The thermo-optic coefficient of the liquid was obtained by monitering the shift of resonance wavelengths of the devices with change of environmental temperature.

태양열을 이용한 발전기술

이현진,Lee, Hyeon-Jin 대한전기협회 2012 전기저널 Vol.426 No.-

고조리서와 종가의 무김치 비교 연구

이현진,이상원,전형주,정혜정,Lee, Hyun-Jin,Lee, Sang-won,Jeon, Hyeong-ju,Chung, Hea-jung 한국식품영양학회 2015 韓國食品營養學會誌 Vol.28 No.5

The purpose of this research aims to reveal how radish kimchi (Jong-ga) differs in Jong-ga recipes and old cookbooks. To accomplish this, old cookbooks ("Soowoonjabbang", "Jusiksiui", "Eumsikbangmunnira", "Siuejunsuh", "Banchandeungsok", and "Buinpilji") were reviewed and 8 Jong-ga recipes (Seogye Park Se-dang from the Bannam Park clan Jong-ga, Myungsukgong from the Changnyeong Jo clan Jong-ga, Nampa Park Jae-gyu from the Milyang Park clan Jong-ga, Geunggudang Kim Joong-jeung from the Gwangsan Kim clan Jong-ga, Dongchundang Song Jun-gil from the Eunjin Song clan Jong-ga, Myeongjae Yun Jung from the Papyung Yun clan Jong-ga, Daeseunggong Ryu Cha-dal from the Munhwa Ryu clan Jong-ga, Inmukjae Son Sung-jeung from the Milseong Son clan Jong-ga) from five areas were reviewed. We classified the radish kimchi into five categories, radish kimchi, Dongchimi, kkakdugi, Seokbakji and Nabak kimchi and other kimchi. According to old cookbooks, most kimchi was made with radish, cabbage, cucumber, pear, yuju, fish meat, and salt. Modern Jong-ga is made of seasoned radish, sticky rice paste, seafood, sugar, powdered pepper, fish sauce and salt. This study helps to understand notable clans' cultures via their recipes for kimchi.