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Im, Ju-Sung,Cho, Kwang-Soo,Cho, Ji-Hong,Park, Young-Eun,Cheun, Chung-Gi,Kim, Hyun-Jun,Cho, Hyun-Mook,Lee, Jong-Nam,Jin, Yong-Ik,Byun, Myung-Ok,Kim, Dool-Yi,Kim, Myeong-Jun The Korean Society of Plant Biotechnology 2012 식물생명공학회지 Vol.39 No.3
This study was conducted to evaluate agronomic characteristics such as growth, quality, and yields of StMyb1R-1 transgenic potato and also to obtain the basic data for establishing assessment guidelines of transgenic potato. Three transgenic lines (Myb 1, Myb 2, and Myb 8) were cultivated under conventional irrigation, drought condition, and severe drought condition and were analyzed by comparing with wild type, non-transgenic cv. Superior. Myb 2 showed a different flower color from wild type and Myb 1 had much bigger secondary leaflets than wild type. Myb 1 and Myb 2 showed higher $P_2O_5$ content in both top and root zone and longer shaped tubers than wild type. In yield factors, transgenic lines had more tubers than wild type, however their yield decreases were severe because of the poor enlargement of tuber under water deficit condition. This tendency was noticeable in Myb 1 and Myb 2. In TR ratio, chlorophyll content, dry matter rate, and relative water content, there were no big differences between transgenic lines and wild type. Meanwhile, in phenotype, growth, quality, and yield factors, substantial equivalent was confirmed between Myb 8 and wild type. Then, Myb 8 showed the highest marketable tuber yield under conventional irrigation, while showed lower level than wild type under water deficit. Judged by this result, the enhancing droughttolerance by StMyb1R-1 gene might actually not mean the enhancement of photosynthesis or starch accumulation in tuber and, furthermore, not the yield improvement. More detailed research will be required to accurately understand the relationship between StMyb1R-1 and yield factors.
Ju Sung Im,Kwang Soo Cho,Ji Hong Cho,Young Eun Park,Chung Gi Cheun,Hyun Jun Kim,Hyun Mook Cho,Jong Nam Lee,Yong Ik Jin,Myung Ok Byun,Dool Yi Kim,Myeong Jun Kim 한국식물생명공학회 2012 식물생명공학회지 Vol.39 No.3
This study was conducted to evaluate agronomic characteristics such as growth, quality, and yields of StMyb1R-1 transgenic potato and also to obtain the basic data for establishing assessment guidelines of transgenic potato. Three transgenic lines (Myb 1, Myb 2, and Myb 8) were cultivated under conventional irrigation, drought condition, and severe drought condition and were analyzed by comparing with wild type, non-transgenic cv. Superior. Myb 2 showed a different flower color from wild type and Myb 1 had much bigger secondary leaflets than wild type. Myb 1 and Myb 2 showed higher P2O5 content in both top and root zone and longer shaped tubers than wild type. In yield factors, transgenic lines had more tubers than wild type, however their yield decreases were severe because of the poor enlargement of tuber under water deficit condition. This tendency was noticeable in Myb 1 and Myb 2. In TR ratio, chlorophyll content, dry matter rate, and relative water content, there were no big differences between transgenic lines and wild type. Meanwhile, in phenotype, growth, quality, and yield factors, substantial equivalent was confirmed between Myb 8 and wild type. Then, Myb 8 showed the highest marketable tuber yield under conventional irrigation, while showed lower level than wild type under water deficit. Judged by this result, the enhancing droughttolerance by StMyb1R-1 gene might actually not mean the enhancement of photosynthesis or starch accumulation in tuber and, furthermore, not the yield improvement. More detailed research will be required to accurately understand the relationship between StMyb1R-1 and yield factors.
김정임 ( Jung Im Kim ),최근형 ( Geun Hyoung Choi ),권오경 ( Oh Kyung Kwon ),홍수명 ( Su Myeong Hong ),박연기 ( Yun Gi Park ),옥용식 ( Yong Sik Ok ),김진효 ( Jin Hyo Kim ) 한국응용생명화학회 2012 Journal of Applied Biological Chemistry (J. Appl. Vol.55 No.1
We designed a new rapid detection method for volatilized formaldehyde from wood. The process was installed with volatilizing and collecting parts in an incubator. For rapid sampling of formaldehyde from wood, we pulverized the wood to sawdust, and used 0.15-2.0 mm particles for the tests. The highest sampling rate (94.8%) was obtained at 40 mL/min flow rate and 100oC. Under the optimized condition, we could collect the volatilized formaldehyde with good recovery rate. The developed method was applied to the monitoring of the formaldehyde from wood, and the measured concentrations were 0.7-4.6 μg/g from natural wood, 5.9-12.3 μg/g from preserved wood, and 5.9- 211.5 μg/g from chemical adhesive processed wood. From the results, we identified natural wood sawdust and chemically processed wood (medium density fiberboard, high density fiberboard, particle board) by the formaldehyde contents except preserved wood.
뇌종양과 기타 국소성 뇌질환에서 운동과 감각과제를 이용한 기능적 자기공명영상
옥철수,임명관,김형진,서창해,Ok, Cheol-Su,Im, Myeong-Gwan,Kim, Hyeong-Jin,Seo, Chang-Hae 대한영상의학회 2002 대한영상의학회지 Vol.46 No.5
목적: 뇌종양과 국소적 뇌질환이 있는 환자에서 운동과 감각과제를 통해 기능적 자기공명영상(fMRI)를 시행하여 국소적 뇌질환에서의 fMRI의 임상적 유용성을 알아보고자 하였다. 대상과 방법: 종양과 국소적 뇌질환 환자 5명(뇌종양 2예,뇌유구낭미충증,동정맥기형,뇌경색 각1예)과 7명의 정상 자원자를 대상으로 운동 기능과 감각 기능을 측정하였다.fMRI는1.5T MR기기를 사용하여 에코평면영상으로 BOLD 기법을 이용하였다.영상후 처리는 PC로 옮겨 SPM분석 프로그램을 이용하여 시행하였다. 결과: 정상 자원자의 경우,손의 운동 및 감각 과제를 시행하였을 때,운동과제시는 반대측 일 차 감각-운동중추와 부운동중추의 강한 활성화를 보였고 감각과제시에는 반대측 감각-운동중추의 활성화와 그 외 감각중추에서 강한 활성화를 보였다.뇌종양과 국소적 뇌질환이 있는 경우,중요 감각 및 운동 중추 부위와 병변부위의 관계 그리고 떨어진 정도를 수술 전에 알 수 있었고 후유증이 없는 수술이 가능하였다.또한 중요 기능을 담당하는 중추가 파괴된 경우에는 동측 중요 중추나 혹은 다른 중요부위에서 활성화의 재형성을 시사하는 소견을 보였다. 결론:국소적인 뇌질환이 있는 경우에 성공적인 fMRI을 통해 수술 방법이나 치료방침의 결정 에 많은 도움을 줄 수 있으리라 생각된다. Purpose: To determine the usefulness of the functional MRI (fMRI) using motor and sensory stimuli in patients with brain tumors or focal cerebral lesions. Materials and Methods: This study involved five patients with brain tumors (n=2) or cerebral lesions [cysticercosis (n=1), arteriovenous malformation (n=1), focal infarction (n=1)] and seven normal controls. For MR examinations a 1.5T scanner was used, and during motor or sensory stimulation, the EPI BOLD technique was employed. For image postprocessing an SPM program was utilized. Results: In volunteers, contralateral sensori-motor cortices were activated by both motor and sensory stimuli, while supplementary motor cortices were activated by motor stimuli and other sensory cortices by sensory stimuli. Preoperative evaluation of the relationship between lesions and important sensory and motor areas was possible, and subsequent surgery was thus successful, involving no severe complications. Activation of ipsilateral or other areas occurred in patients with destruction of a major sensory and/or motor area, suggesting compensatory reorganization. Conclusion: fMRI could be a useful supportive method for determining the best approach to surgery treatment in patients with brain tumors or focal cerebral lesions.
김해수 ( Hae Soo Kim ),임나리 ( Na Ri Im ),박준호 ( Jun Ho Park ),김명옥 ( Myeong-ok Kim ),박수남 ( Soo Nam Park ) 대한화장품학회 2014 대한화장품학회지 Vol.40 No.1
본 연구에서는 떡쑥 추출물의 항산화 활성 및 활성 성분을 확인하였다. 모든 실험은 떡쑥 추출물의 70% 에탄올 추출물, 에틸아세테이트 분획, 아글리콘 분획을 이용하여 진행하였다. DPPH (1,1-diphenyl-2-picrylhydrazyl) 법을 이용한 free radical 소거활성(FSC<sub>50</sub>)은 에틸아세테이트 분획(6.15 μg/mL)이 비교물질인 (+)-α-tocopherol (8.89 μg/mL)보다 높게 나타났다. 루미놀 발광법을 이용한 Fe<sup>3+</sup>-EDTA/H<sub>2</sub>O<sub>2</sub>계에서 생성된 활성산소종(reactive oxygen species, ROS)에 대한 떡쑥 추출물의 총 항산화능(OSC<sub>50</sub>)은 70% 에탄올 추출물의 경우 1.60 μg/mL, 에틸아세테이트 분획의 경우 0.075 μg/mL, 아글리콘 분획의 경우 2.28 μg/mL로 비교물질인 L-ascorbic acid (6.88 μg/mL)보다 큰 활성을 나타내었다. 사람 적혈구의 <sup>1</sup>O<sub>2</sub>로 유도된 세포손상에 대한 보호효과 실험에서 70% 에탄올 추출물과 아글리콘 분획의 τ50은 10 μg/mL에서 각각 52.0, 60.6 min으로 지용성 항산화제로 알려진 (+)-α-tocopherol (38.0 min)보다 더 큰 세포 보호 효과를 나타내었다. TLC와 HPLC를 이용한 아글리콘 분획의 성분분석 결과 luteolin, apigenin 등이 존재함을 확인하였다. 이상의 결과들로부터 떡쑥 추출물은 라디칼을 포함한 활성산소종을 소거하는 항산화제로서 응용될 수 있음을 시사한다. In this work, the antioxidative effects and active component analysis of Gnaphalium affine D. DON. (G. affine) extracts were investigated. All experiments were performed with 70% ethanol extract, ethyl acetate fraction and aglycone fraction of the G. affine extract. The free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity (FSC<sub>50</sub>) of ethyl acetate fraction (6.15 μg/mL) of the G. affine was higher than that of (+)-α-tocopherol (8.89 μg/mL), which is known as a reference control. Reactive oxygen species (ROS) scavenging activities (OSC<sub>50</sub>) of the 70% ethanol extract (1.60 μg/mL), ethyl acetate fraction (0.075 μg/mL) and aglycone fraction (2.28 μg/mL) of extract of G. affine on ROS generated in Fe<sup>3+</sup>-EDTA/H<sub>2</sub>O<sub>2</sub> system using the luminol-dependent chemiluminescence assay were much higher than that of L-ascorbic acid (6.88 μg/mL). The cellular protective effects of 70% ethanol extract (τ<sub>50</sub> = 52.0 min) and aglycone fraction of the extract (τ<sub>50</sub> = 60.6 min) on the <sup>1</sup>O<sub>2</sub>-induced cellular damage of human erythrocytes were exhibited the higher protective effect than (+)-α-tocopherol (τ<sub>50</sub> = 38.0 min), known as a lipophilic antioxidant. TLC and HPLC were used to analyse active components in the aglycone fraction of the extract. Results showed that luteolin and apigenin were main components. These results suggest that the G. affine extract can be applied to an effective antioxidant in scavenging ROS including radicals.
Ni기 초합금 B1914의 다결정, 방향성 및 단결정 주조구조에 따른 고온 인장 특성 연구
안성욱,장용석,윤동한,임옥동,진영훈,이재훈,서동이,오제명,이상준,임대순,An, Seong-Uk,Jang,Yong-Seok,Yun, Dong-Han,Im, Ok-Dong,Larionov, V.,Grafas, I.,Jin, Yeong-Hun,Lee, Jae-Hun,Seo, Dong-Lee,O, Je-Myeong,Lee, Sang-Jun,Lim, Dae-Soon 한국재료학회 1998 한국재료학회지 Vol.8 No.9
Ni기 초합금인 B1914로 다결정, 방향성 및 단결정을 제조하여, 상온과 고온에서 이들 결정종류에 따른 변형을 관찰하였다. 이들 결정을 제작하기 위하여 진공 주조로에서 냉각속도와 온도구배를 제어하였으며, 제작된 봉상 시편들은 2단계의 진공열처리를 하고 아르곤가스로 급냉하였다. 동일한 모합금인 B1914로 제조된 결정들은 결정종류에 따라서 뚜렷한 변형(stress-strain)을 나타내었다. 즉, 항복강도와 인장강도는 다결정, 방향성 및 단결정 순으로 뚜렷이 증가하였다. 또한 $600^{\circ}C$에서 모든 결정들은 $\gamma$'의 강화효과로 인해서 가장 높은 741-816MPa의 항복강도를 나타내었으며, 인장강도는 1005-1139MPa이었다. The B1914 Ni-base superalloy was manufactured according to crystal structures of poly-, directionally solidified- and single crystals. We observe deformation as type of different crystal structure from room to high temperature. Specimens are controled by cooling rate and thermal gradient and then heat treatment in vacuum and then cooling with Ar gas. Different crystal structure has different stress-strain characteristic. At $600^{\circ}C$, yield strength and ultimate strength is increased single-, directionally solidified- and poly crystals in order.