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Base Emitter Codiffusion 소자 제조 및 전기적 특성 고찰
李善東,金政彦,朴淳太,梁光鎭,洪昌熹 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.2
In the time when we fabricated the NPH bipolar transistor the temperature annealing was needed. Then the properties of transistor was damaged because of inducing the silicon lattice defects. In this paper, proposed codiffusion method was able to control of junction depth by implant energy, dose concentration, diffusing temperature and annealing time control. In addition to, we studied for developed the transistor of high speed switching.
Biochemical Characterization of 1-Aminocyclopropane-1-Carboxylate Oxidase in Mung Bean Hypocotyls
Jin, Eon-Seon,Lee, Jae-Hyeok,Kim, Woo-Taek Korean Society for Biochemistry and Molecular Biol 1998 Journal of biochemistry and molecular biology Vol.31 No.1
The final step in ethylene biosynthesis is catalyzed by the enzyme 1-aminocyclopropane-1-carboxylate (ACC) oxidase. ACC oxidase was extracted from mung bean hypocotyls and its biochemical characteristics were determined. In vitro ACC oxidase activity required ascorbate and $Fe^{2+}$, and was enhanced by sodium bicarbonate. Maximum specific activity (approximately 20 nl ethylene $h^{-1}$ mg $protein^{-1}$) was obtained in an assay medium containing 100 mM MOPS (pH 7.5), $25\;{\mu}M$ $FeSO_4$, 6 mM sodium ascorbate, 1 mM ACC, 5 mM sodium bicarbonate and 10% glycerol. The apparent $K_m$ for ACC was $80{\pm}3\;{\mu}M$. Pretreating mung bean hypocotyls with ethylene increased in vitro ACC oxidase activity twofold. ACC oxidase activity was strongly inhibited by metal ions such as $Co^{2+}$, $Cu^{2+}$, $Zn^{2+}$, and $Mn^{2+}$, and by salicylic acid. Inactivation of ACC oxidase by salicylic acid could be overcome by increasing the $Fe^{2+}$ concentration of the assay medium. The possible mode of inhibition of ACC oxidase activity by salicylic acid is discussed.
Jin-Hwan Jeon,Bong Gu Song,Sung-chan Yang,Byung-Eon Noh,Seong Yoon Kim,Hyung-Woo Lim,Hak Seon Lee,Wonil Park,Kyu-Sik Chang,Jong Yul Roh,E-Hyun Shin,Young Ran Ju,Wook-Gyo Lee 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.04
The purpose of this monitoring is to survey the geographical distribution of tick species using dry ice bait traps and flagging methods at each ten provinces (GangwonⅠ,GangwonⅡ, Gyeonggi, Chungbuk, Chungnam, Gyeongbuk, Gyeongnam, Jeonbuk, Jeonnam and Jeju area) and one Metropolitan area in the Republic of Korea for eight months from April through November, 2016. A total of 65,339 ixodid ticks (8,200 females, 1,988 males, 31,453 nymphs and 23,698 larvae) was collected, belonging to three genera (Haemaphysalis, Ixodes and Amblyomma). Haemaphysalis longicornis was the most commonly collected species, which is represented for 96.88% of all the collected ticks and followed by H. flava (2.69%), I. nipponensis (0.35%), A. testudinarium (0.05%) and H. japonica (0.03%) in the Republic of Korea for the study period. Haemaphysalis longicornis was a dominant species observed in these eleven areas.