http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Chitosan을 이용한 Levan Fructotransferase의 고정화
임승,이기영,최춘순 전남대학교 촉매연구소 2001 觸媒硏究 論文集 Vol.22 No.-
The condition for the immobilization of the partially purified levan fructotransferase and the properties of the immobilized enzyme was investigated. Levan fructotransferase was immobilized on chitosan with glutaraldehyde, crosslinking agent. The optimum activity of immobilized enzyme was obtained at 0.125%(v/v) glutaraldehyde concentration. The immobilized enzymes had 40% higher relative activity than free enzyme. The optimal temperature and pH were 55℃ and 6.0 or 5.5 for the immobilized and free enzyme. The conversion ratio of free enzyme and immobilized enzyme was 45% and 36% respectively at 24hr.
임승,김정목,정주연,임시근 한국분석과학회 2018 분석과학 Vol.31 No.1
Finding the blood left at a crime scene is very important to reconstruct or solve a criminal case. Although numerous reagents have been developed for use at crime scenes, luminol is the most representative. Bluestar Forensic has been used in recent years, but is expensive and cannot be stored after preparation. This study aims to develop a new luminol reagent that can be stored for a long period of time while maintaining the chemiluminescence intensity at the level of Bluestar Forensic. Because luminol dissolves well in aqueous alkaline solutions, the use of sodium hydroxide in the preparation of luminol reagents can promote the decomposition of hydrogen peroxide. Magnesium sulfate, sodium silicate, and potassium triphosphate have been used as hydrogen peroxide stabilizers. The effects of the addition of these substances on the chemiluminescence emission intensity and the storage period of the luminol reagents were confirmed. The addition of a hydrogen peroxide stabilizer was shown to have no significant affect on the chemiluminescence emissions intensity or stabilized pH of the luminol reagent during storage. It also greatly increases the shelf life of the reagents. The use of magnesium sulfate as a hydrogen peroxide stabilizer is the most appropriate. When sodium perborate is used instead of hydrogen peroxide as an oxidizing agent, there is no significant change in the sensitivity and chemiluminescence emissions intensity, but the storage period is shortened. However, after the reaction with blood, the pH of the mixed solution does not increase significantly, and is judged to be more suitable than a reagent made of hydrogen peroxide.
임승만,임정민,박정태 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
A graft copolymer based mesoporous TiO<sub>2</sub>/ZnO interfacial layers for quasi solid state dyesensitized solar cells (QDSSCs) has been fabricated by the sol-gel method. The features of the mesoporous TiO<sub>2</sub>/ZnO interfacial layers were tested by SEM, EDS, and UV-vis spectroscopy. The cells were systemically tested by the photocurrent-voltage (J-V) curve, and EIS techniques. The mesoporous TiO<sub>2</sub>/ZnO interfacial layers was found to accelerate electron transfer, light harvesting and retard electron recombination, eventually leading to an efficient improve in energy conversion efficiency. The QDSSCs assembled with the interfacial layer consisting of mesoporous TiO<sub>2</sub>/ZnO exhibited short-circuit current density (JSC) of 9.8 mA cm-2, open-circuit voltage (VOC) of 0.76 V and conversion efficiency of 5.0%, which were higher than that without interfacial layer (4.2 %).
유도형 활공 탄약 비행제어시스템 개발 PartⅠ: 운용 개념 및 항법
임승한(Seunghan Lim),박장호(Changho Pak),조창연(Changyeon Cho),방효충(Hyochoong Bang) 한국항공우주학회 2014 韓國航空宇宙學會誌 Vol.42 No.3
본 논문은 유도형 활공 탄약의 운용 개념을 소개하고, 이를 위한 항법 알고리듬을 제안하였다. 유도형 활공 탄약은 기존의 유도형 탄약과는 다르게 사거리 증가를 위한 날개를 장착하고 활공하며, 이를 위해 날개 전개 전 탄체의 회전은 제거된다. 따라서 일정한 회전속도를 고려한 기존 유도형 탄약 항법 알고리듬은 활공 중에는 사용할 수 없다. 또한 탄체의 회전이 제거되면 회전 관성이 작아져 횡축이 불안정해져 횡축 가속도를 제어해야 하고, 이로 인해 롤 자세에 의한 횡축 중력 가속도 성분을 알 수 없다. 따라서 횡축 중력 가속도 성분을 기반으로 롤 자세를 추정하는 등속 수평 비행 상태를 가정한 기존 항법 알고리듬은 사용할 수 없다. 본 논문에서는 유도형 활공 탄약의 회전 중 상태 추정을 위해서는 Lucia가 제안한 알고리듬을 사용하였고, 활공 중 상태 추정을 위해서는 새로운 항법 알고리듬을 제안하였다. In this paper, the operational concept and the navigation algorithms for the gliding guided artillery munition are studied. The gliding guided artillery munition has wings for gliding; therefore spin of the munition should be eliminated. The previous navigation algorithms assumed a spinning munition with constant angular velocity; hence, they cannot be applied for the gliding munition. Moreover, lateral stability becomes worse due to decrease of angular momentum. Therefore, side force should be controlled to improve the stability, and the munition should maneuver, then the previous navigation algorithms for typical fixed-wing aircraft cannot be applied. In this paper, we apply the previous navigation algorithms for the spinning munition. Spin is eliminated and wings are deployed based on the estimation results, and the advanced navigation algorithm for the non-spinning munition is introduced.