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김재환,김영록,김해영,Kim, Jae-Hwan,Kim, Young-Rok,Kim, Hae-Yeong 한국식물생명공학회 2011 식물생명공학회지 Vol.38 No.2
1994년 처음으로 GM 토마토인 Flavr Savr가 시장에 나온 이후, 2010년 현재 140여 품목의 GM식물이 전 세계적으로 상업화되었다. GM식물들에 대한 안전성 승인여부의 확인 및 표시제관리를 위하여 이들 GM식물내로 도입된 삽입유전자의 정보를 이용한 검정방법이 도입되었으며, 또한 도입유전자의 발현된 단백질을 분석하기 위하여 정성 및 정량을 위한 면역학적 방법이 도입되었다. 본 총설에서는 국내 외적으로 개발된 콩, 옥수수, 카놀라, 면화 등의 GM식물에 적용된 multiplex PCR, real-time PCR 방법과 최신 개발 중인 microarray, 나노기술 등을 활용한 방법들을 조사하였다. Since the first commercial GM plant, the FlavrSavr tomato, authorized in 1994, more than 140 GM plants were authorized for marketing globally. For the authorization and labelling of GM plants, the detection methods for genes introduced and proteins expressed in GM plants were developed qualitatively and quantitatively. This review presented the detection methods, conventional PCR, multiplex PCR and real-time PCR, for soybean, maize, canola and cotton as the dominant GM plants. Also, microarray assay and nanotechnology as new approaches for detection methods for GM plants were investigated.
김재환,한민수,이장존,송치영,이재만,김민지,이명성,Kim, Jae-Hwan,Han, Min-Su,Lee, Jang-Jon,Song, Chi-Young,Lee, Jae-Man,Kim, Min-Ji,Lee, Myeong-Sung 국립문화재연구소 2009 保存科學硏究 Vol.30 No.-
Stone cultural heritages are mostly situated in field, so they are damaged from mechanical, chemical and biological weathering, and their degree of strength is also weaken. Therefore, the scientific conservation of the stone cultural heritages are necessary in order to the long-term maintenance and safety conservation. In this study, we attempt to estimate on the field application of consolidants which are Wacker OH 100, Remmers KSE 300 and 1T1G according to the quality of the rocks. Based on the ultrasonic velocity, conditions of weathering damage before treatment are mainly ranked completely weathering condition (CW) or partly highly weathering condition (HW). After the first treatment, weathering damage conditions are changed by the high weathering condition (HW). These results shows that the internal pores of stone are filled with consolidant materials, so average ultrasonic velocities increases after treatment. And Remmers KSE 300 which is consolidant material is highest rate of increase of average ultrasonic velocities.
김재환,전용준,김동섭,노승탁,Kim, Jae Hwan,Jeon, Yong Joon,Kim, Tong Seop,Ro, Sung Tack 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.6
This paper presents models for the dynamic simulation of a regenerative gas turbine and describes dynamic behaviors of a small regenerative engine. A quasi-steady model is introduced where the inertia of the working fluid is assumed to be negligible compared with the mechanical inertia of the rotating shaft. Based on this quasi-steady model, the transient model for the heat exchanger is employed to simulate the unsteady heat exchange in the recuperator. The effect of the thermal inertia of the recuperator metal on transient behaviors is analyzed by comparing the predicted results of the transient and steady state heat exchanger models. For several load change modes such as sudden increase, decrease and periodic variation, engine dynamic characteristics are investigated by applying a fuel control logic for the constant shaft speed. It is found that the thermal inertia of the recuperator metal has a dominant effect on the whole engine dynamic behavior.
ECR 플라즈마 화학기상증착법에 의한 0.12nm $\textrm{SiO}_2$ 환산두계를 갖는 Pb(Zr, Ti)$\textrm{O}_3$유전박막의제조
김재환,김용일,위당문,이원종,Kim, Jae-Hwan,Kim, Yong-Il,Wi, Dang-Mun,Lee, Won-Jong 한국재료학회 1997 한국재료학회지 Vol.7 No.8
ECR-PECVD법을 사용하여 450-49$0^{\circ}C$이하의 온도에서 Pt/SiO$_{2}$/Si기판 위에 PZT 박막을 증착하였다. 기판 온도가 46$0^{\circ}C$ 이하일 경우에는 페로브스이트 상과 제2상으로 이루어진 박막이 성장하였으며 기판온도가 47$0^{\circ}C$이상일 때에는 페로브스카이트 단일상의 PZT 박막이 성장하였다. 49$0^{\circ}C$에서 매우 얇은 페로브스카이트의 PZT 박막을 증착한 후 $650^{\circ}C$에서 1분간 raped thermal annealing(RTA) 처리한 결과 박막의 조성과 결정성에는 거의 변화가 없었으나 박막의 전하 저장 밀도는 크게 향상되었다. 이는 RTA 처리에 의한 저유전 계면층의 소멸이 주된 이유라고 판단된다. 열처리 후 두께 40-45nm의 PZT박막은 200kV/cm의 전장 하에서 $10^{-6}$$\textrm{cm}^2$이하의 누설전류값을 갖고 있었으며, 인가전압 1V에서 300fF/$\mu$$m^2$의 정전용량, 즉 SiO$_{2}$환산두께 0.12nm를 나타내었다.
다한증(多汗症) 환자(患者)의 양도락(良導絡)측정 영역별 교감신경(交感神經)활성 상태에 대한 연구
김재환,정승기,정희재,Kim, Jae-Hwan,Jung, Sung-Ki,Jung, Hee-Jae 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.1
Objective : Hyperhidrosis is the secretion of sweat in amounts greater than physiologically needed for thermoregulation. Ryodoraku is a physiological function test using electric current, and is closely related to skin sympathetic tone. The aim of this study was to investigate the characteristics of Ryodoraku and association of Ryodoraku with hyperhidrosis. Methods : For this study, we conducted Ryodoraku on 56 people, comprising 33 with palmar-plantar hyperhidrosis and 23 with head-face hyperhidrosis, who visited the 5th Internal Department of the Oriental Medicine Hospital of Kyung Hee University during the period from March 1, 2008 to May 31, 2009. Ryodoraku scores were evaluated and compared by 7 indices(upper, lower, left, right, yin, yang, total score). Results : Ryodoraku scores were significantly higher in hyperhidrosis patients than the normal group. Ryodoraku scores of palmar-plantar hyperhidrosis patients were significantly higher than of head-face hyperhidrosis patients and the normal group. The difference of Ryodoraku indices among palmar-plantar hyperhidrosis patients were insignificant. In head-face hyperhidrosis patients, the upper index was significant higher than the lower index. Conclusions : In hyperhidrosis patients, all indices were significant higher than lower. The upper/lower ratio was significant higher in head-face hyperhidrosis patients.