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우주폭풍연구를 위한 중 에너지 입자검출기의 표준화 과정
이찬행(Chanhaeng Lee),윤세영(Seyoung Yoon),우주(Ju Woo),설우형(Woohyung Seol),이채안(Chaean Lee),서용명(Yongmyung Seo),선종호(Jongho Seon),손종대(Jongdae Sohn),민경욱(Kyoungwook Min),강경인(Kyungin Kang),신구환(Goohwan Shin),채장수(Jan 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.4
경희대학교에서 개발하는 Medium Energy Particle Detector (MEPD)는 우주폭풍연구를 위한 과학 탑재체의 구성으로써 중 에너지 우주 방사선을 검출하는 역할을 담당한다. 본 입자검출기는 20~400 keV 의 에너지 대역에서 플라즈마 입자를 검출한다. 본 연구에서는 표준화되어 있지 않은 각 입자검출기의 에너지-채널 관계를 표준 방사선원의 잘 알려진 방출에너지 값을 이용하여 표준화 하였다. 이를 통해 각 검출기는 시작점과 간격이 동일한 데이터를 생산한다. 본 연구의 주 내용은 검출기 데이터 표준화를 위한 Look Up Table 수정 방법이며 표준화 작업이 완료된 검출기로 측정한 데이터를 결과로써 제시한다. The Medium Energy Particle Detector (MEPD) is one of the subset detectors which are in the Instrument for the Study of Space Storms (ISSS). This particle detector measures the electrons, protons and neutral particles whose energy range is from 20 keV to 400 keV. In this study, we calibrated the correlation of energy with channel by using the peak energies emitted from the well-known radionuclide. The main topic of this research is to manipulate the correspondence between the signal pulse heights digitized by the ADC and energy channels by adopting programmable Look-Up Table (LUT). We make the data have equal offsets and energy scales through iterative modification. Finally, the radionuclide spectrums which are calibrated are provided as a result of this study.
느티만가닥버섯의 ITS (internal transcribed spacer) 영역의 2차구조 분석
우주리(Ju-Ri Woo),윤혁준(Hyeokjun Yoon),유영현(Young-Hyun You),이창윤(Chang-Yun Lee),공원식(Won-Sik Kong),김종국(Jong-Guk Kim) 한국생명과학회 2013 생명과학회지 Vol.23 No.10
본 연구에서는 H. marmoreus 3-10균주와 H. marmoreus 1-1균주의 ribosomal DNA (rDNA) cluster의 분석이 수행되었다. Small subunit (SSU)와 intergenic spacer 2 (IGS 2)는 부분적으로 염기서열이 결정되었고, internal transcribed spacer 1 (ITS 1), 5.8S, internal transcribed spacer 2 (ITS 2), large subunit (LSU), intergenic spacer 1 (IGS 1), 5S는 완전하게 염기서열이 결정 되었다. 팽이버섯 H. marmoreus 3-10균주와 H. marmoreus 1-1균주의 rDNA cluster는 총 7,049 bp로 결정되었다. SSU은 1,796 bp, ITS1은 229 bp, 5.8S은 153 bp, ITS2는 223 bp, LSU은 3,348 bp, IGS1은 390 bp, IGS2은 900 bp로 염기서열이 분석되었다. 결정된 rDNA cluster의 총 7,049 bp 중에서 17 bp가 다름이 확인되었고, 각각 SSU (2 bp), ITS (3 bp), LSU (9 bp), IGS (3 bp)에서 차이를 확인하였다. ITS regions의 2차 구조 결과 5개의 stem-loop가 있음이 드러났다. 흥미롭게도, 이들 stem-loop 사이에서 stem-loopⅤ에서 한 개의 상이한 염기가 다른 2차 구조를 나타냄을 확인하였다. The ribosomal DNA (rDNA) clusters of Hypsizygus marmoreus 3-10 and H. marmoreus 1-1 were analyzed in this study. The small subunit (SSU) and intergenic spacer 2 (IGS 2) was partially sequenced. The internal transcribed spacer 1 (ITS 1), 5.8S, internal transcribed spacer 2 (ITS 2), large subunit (LSU), intergenic spacer 1 (IGS 1), and 5S were completely sequenced. The rDNA clusters of H. marmoreus 3-10 and H. marmoreus 1-1 were 7,049 bp in length. The sequence of SSU rDNA, which corresponded to 18S rDNA, was 1,796 bp in length, and the sequence of LSU rDNA, which corresponded to 28S rDNA, was 3,348 bp in length. The ITS region that variable region and IGS region that nontranscribed spacer was 462 bp and 1,290 bp in length. The sequence of 5.8S rDNA and 5S rDNA was 153 bp and 43 bp in length, respectively. The 17 bp of the rDNA cluster in the H. marmoreus 3-10 strain was different to that in the H. marmoreus 1-1 strain, with 2 bp in the SSU, 3 bp in the ITS, 9 bp in the LSU, and 3 bp in the IGS. The analysis of the secondary structure revealed that the ITS regions of H. marmoreus 3-10 and H. marmoreus 1-1 have five stem-loop structures. Interestingly, among these structures, one different nucleotide sequence resulted in a different secondary structure in stem-loop V.
우주연 ( Ju Yun Woo ),이상우 ( Sang Woo Lee ),변지연 ( Ji Yeon Byun ),최유원 ( You Won Choi ),오지원 ( Chee Won Oh ),최혜영 ( Hae Young Choi ) 대한피부과학회 2015 대한피부과학회지 Vol.53 No.2
Eruptive collagenoma is a rare acquired type of connective tissue nevus that predominantly consists of collagen. It usually presents as multiple, asymptomatic, firm, flesh-colored or pink nodules or plaques that are symmetrically distributed over the trunk and upper extremities. Four cases of eruptive collagenoma in linear or zosteriform arrangements have been reported in the English literature. A 16-year-old boy presented with multiple asymptomatic erythematous papules and nodules on the left side of his sternal margin and the posterior side of his left neck. A punch biopsy taken from one of the nodules on the chest showed thickened collagen fibers in the dermis. Masson-Trichrome staining revealed an increase in the collagen fibers, which were broad and arranged haphazardly, and the elastic staining indicated a reduction in the elastic fibers in the dermis, which are findings that are consistent with collagenoma. We report a case of eruptive collagenoma that presented in a linear arrangement, which is a rare distribution pattern for connective tissue nevi. (Korean J Dermatol 2015;53(2):148∼151)
지자기 폭풍 연구를 위한 20~400 keV 대역의 플라즈마 입자 검출기
서용명(Yongmyung Seo),윤세영(Seyoung Yoon),우주(Ju Woo),설우형(Woohyung Seol),이채안(Chaean Lee),이찬행(Chanhaeng Lee),선종호(Jongho Seon),손종대(Jongdae Sohn),민경욱(Kyoungwook Min),강경인(Kyungin Kang),신구환(Goohwan Shin),채장수(Jan 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.4
경희대학교가 제작한 중에너지 입자 검출기(Medium Energy Particle Detector, MEPD)는 우주폭풍 연구에 필요한 물리량 획득을 위한 과학 탑재체(Instrument for the Study of Space Strom, ISSS)중 20~400 keV 대역의 전자, 양성자 및 중성 입자를 6.25 keV 와 1 sec ~ 10 msec의 에너지 및 시간 분해능으로 검출한다. 본 검출기는 지자기 폭풍 발생 시 급격히 증가하는 대전 입자들을 정전 편향기(electrostatic deflector)와 감쇄기가 적용된 망원경 2대의 수직 배치를 통하여, 데이터 오염과 전장부 포화를 방지하고 예상되는pitch angle에 따라 입자의 종류 및 에너지를 구분 검출 하도록 제작 되었다. 해당 탑재체의 위성 본체는 한국과학기술원 인공위성연구센터가 개발 중인 차세대 소형위성 1호 (Next Generation Small Satellite-1, NEXTSat-1) 이며, 2017년 발사 예정이다. Measurement of energies and fluxes for the charged particles and neutral is required for research of space storms. The measurement requires a careful calibration of the instrument to detect significantly varying fluxes of those particles relative to the occurrence of geomagnetic storms without saturation or loss of information on the mission orbit. The Medium Energy Particle Detector (MEPD) will have an energy range from 20~400 keV and resolution 6.25 keV with orthogonal field-of-views of two telescopes for the detection of charged particles in terms of different pitch angles. The MEPD is one of a subset instrument within the Instrument for the Study of Space Strom (ISSS) which contains both space radiation detectors and space plasma instruments. The ISSS is developed to measure space storms in low altitude polar orbits and will be aboard the Next Generation Small Satellite-1 (NEXTSat-1) scheduled for launch in 2017.
이동선,이상한,우주형,이진만,서영배,홍순덕,Lee, Dong-Sun,Lee, Sang-Han,WOO, Ju-Hyung,Lee, Jin-Man,Seu, Young-Bae,Hong, Soon-Duck 한국생명과학회 1997 생명과학회지 Vol.7 No.3
Methylelaiophylin은 gram양성균에 대하여 광범위한 항균활성을 보이며, 특히Bacillus subtilis에서 superoxide redicals을 발생하여 항균활성을 나타낸다. B. subtilis에 대한 항균활성은 wild type strain보다 mutant strain인 rec$^{-}$에 대하여 더민감하며, 이러한 항균력은 항산화제인 dithiothreito에 의하여 현저히 감소되었다. 또한 항균력은 세포내 RNA합성보다 DN합성에 효과적으로 작용하였다. 이러한 결과들은 methylelaiophylin의 항균활성이 세포내에서 발생한 활성산소에 의하여 기인한 것임을 나타낸다. Methylelaiophylin generated superoxide radicals in Bacillus subtilis and showed antibacterial activity against a broad range of gram positive bacteria. The inhibition of DNA synthesis was more sensitive than one of RNA synthesis. A recombination-deficient mutant strain of B. subtilis was 2-fold more sensitive than a wild strain, and this sensitivity was reduced in the presence of an antioxidant, dithiothreitol. Methylelaiophylin generated superoxide radicals in B. subtilis lysates, and this suggests that the antibacterial activity of methylelaiophylin is related to the generation of active oxygen species in the cells.
느티만가닥버섯의 신품종에 대한 endo-, exo-cellular 효소 활성도의 비교
Chang-Yun Lee(이창윤),Ho-Sung Song(송호성),Hyeon-Su Ro(노현수),Ju-Ri Woo(우주리),Young-Hyun You(유영현),Jong-Guk Kim(김종국) 한국생명과학회 2012 생명과학회지 Vol.22 No.6
본 연구는 새롭게 개발된 느티만가닥버섯의 6개 품종에 대한 형태적, 생리적 특성을 조사하고 endo-, exo-cellular 효소 활성을 측정하기 위해서 수행되었다. 국내 야생종인 Hm3-10과 일본 재배종인 Hm1-1과의 단핵균사 교배를 통하여 343개의 교배 균주를 획득하여 재배를 실시하여 58개 균주를 1차 선발하고 2차로 6개 균주를 선발하였다. 6개 선발 균주를 대상으로 배양 일수 별로 재배를 실시한 결과 배양일수가 80일 이상에서는 재배일수가 19~20일로 단축되어 최적 배양일수를 80일로 결정하였다. 80일 배양일수에서 각 품종별 형태적 특성을 검증한 결과 Hm15-3, Hm15-4, Hm17-5의 3균주가 재배에 적합한 균주로 판명되었다. 각 균주의 endo-cellular 효소 활성도를 측정한 결과, α-amylase의 효소 활성도가 73.9~102,2 unit/㎎ protein으로 가장 높았으며, chitinase 의 효소활성도가 8.1~13.1 unit/㎎ protein으로 측정되었다. Exo-cellular효소 활성도를 측정한 결과, α-amylase의 효소활성도가 5,292~1,184 unit/㎎ protein으로 가장 높았으며, CMCase와 Xylanase의 효소 활성도가 각각 1,140~245 unit/㎎ protein, 94~575 unit/㎎ protein으로 측정되었다. 그러나 β-glucosidase와 chitinase의 활성도는 비교적 낮은 활성도를 나타내었다. This study was carried out to investigate the morphological and physiological characteristics of six new cultivars of Hypsizygus marmoreus (Hm) and measure endo-, exo-cellular enzyme-specific activity. The domestic wild stain (Hm3-10) and commercial strain in Japan (Hm1-1) were mated by crossing monokaryon mycelia. We gained 58 strains from one of 400 crosses through the 1<SUP>st</SUP> cultivation experiment, and selected six strains from one of 58 strains through the 2<SUP>nd</SUP> cultivation experiment. When six of the selected new strains were grown during several spawn culture periods (60, 70, 80, 90, and 100 days), a spawn culture period of more 80 days was considered to be excellent as being shorter than 19~20 days. Therefore, we determined the period of spawn culture as 80 days. Three strains such as Hm15-3, Hm15-4, and Hm17-5 showed an excellent result. When endo-cellular enzyme activity measured eight strains, we obtained a result of that specific activity of α-amylase at the highest as 73.9~102.2 unit/㎎ protein, and chitinase is lower than α-amylase at 8.1~13.1 unit/㎎ protein. When exo-cellular enzyme activity measured eight strains, we determined the result of that specific activity of α-amylase is the highest at 5,292~1,184 unit/㎎ protein, and CMCase and xylanase were 1,140~245 unit/㎎ protein, 94~575 unit/㎎ protein, compared to each other. However, the enzyme activity of β-glucosidase and chitinase is low.