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베타카로틴 함유 마이크로에멀젼의 제조 및 물리화학적 특성 평가
곽은선,이종화,박목순,이계원,지웅길 충남대학교 약학대학 의약품개발연구소 2000 藥學論文集 Vol.16 No.-
The o/w microemulsions containing β-carotene were made from 3 or 5% w/w oil(soybean oil, cottonseed oil and isopropyl myristate) and 15, 20 or 25% w/w nonionic surfactant (Cremophor EL, Cremophor RH 40 and Brij 97/Pluronic F-68(2:1 w/w). They are characterized by particle size distribution, surface tension and viscosity. Also, stability study was done by antioxidant, long-term storage for 6 months.
Tubular Motor의 動作特性解析 및 開發에 관한 硏究
李殷雄,張錫明,朴允鎬 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.1
This study is to develop the tubular linear induction motor(TLIM) which consists of a travelling aluminum bar and concentric stator windings through examination of theoretical and experimental performance characteristics at slip 0.5% i. e. vector potential, magnetic flux density, thrust force, and power factor in a TLIM. In this study authors examine the practical values of this type motor from the mechanical and economical points of view, and suggest some criteria to have an efficient machine.
HVDC送電을 위해 集積變換器를 附着한 發電機系統의 過流解析
李殷雄 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(B)
Previous researchers have studied a new invention, the integrated generator converter system for HVDC Transmission. This Paper analyzes the general formula for eddy currents in the rotor iron using the double Fourier Series in order to trace the smallest eddy current losses of the system, which connect with a conventional synchronous generator winding and the jth Graetz Bridge.
Torsional Interaction 狀態에 있는 Turbo-發電機의 電氣的 特性
李殷雄 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.1
The torsional resonance of the generator shaft system has the possibility of inducing voltages across the stator winding because it is a carrier with the field excitation. And these torsional induced stator currents induce the eddy current in the rotor. This paper describes the eddy current based on the double Fourier series method of my previous paper[11]. The forces generated during torsional interaction are computed using the Maxwell's magnetic stress tensor for each of the Fourier components. The Parseval's theorem relates the Fourier components of forces to the net force.
염산 독세핀 외용제의 피부 전달 시스템을 위한 제제 설계 및 평가
이은미,김정수,경기열,이계원,지웅길 忠南大學校 生命科學硏究院 醫藥品開發硏究所 2006 藥學論文集 Vol.21 No.-
Doxepin hydrochloride(Dox) is a dibenzoxepin-derivative tricyclic antidepressant and used topically for the short-term relief of moderately severe pruritus associated with atopy dermatitis. Dox topical emulsion(or liposome) formulations were evaluated with respect to their rheological properities, permeation through excised skin of hairless mouse and in vitro/in vivo accumulation in the skin. The apparent viscosity was increased according to the concentration of glycerin and decreased with an increase in the concentration of phosphatidylcholine(PC). The permeation rate of formulation increased with a high concentration of PC and showed no relationship with the change of formulations. Amount of accumulated drug in the excised skin of hairless mouse was decreased with a high concentration of glycerin, but increased according to PC concentration.
SSR(Subsynchronous Resonance)狀態에 있는 Turbo 發電機 回轉子의 渦電流
李殷雄 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.1
The L-C resonance associated with the transmission line reactance and the compensating series capacitor results the rotating mmfs of subsynchronous and supersynchronous frequency in the stator of the synchronous generator. These rotating mmfs of resonance frequency give rise of the eddy current of positive and negative sequence on the rotor. These eddy current are solved analytically for the Laplace's equation ∇²H = 0 in free space and for the Bullard's equation ∇²H/σμ+∇×v×H=σH/t for the rotor by using each double Fourier series component of the 3 dimensional H-fields.
전은순,이영훈,박충웅,조인호 全北大學校 基礎科學硏究所 1988 基礎科學 Vol.11 No.1
E. coli rnpB gene의 발현에 영향을 미치는 M1 RNA structural gene의 부분을 조사하였다. P-1 promoter 에서 합성되는 RNA의 5' 부분이 이루는 이차구조를 분석한 결과 +1 에서 부터 +72 까지에 존재하는 hairpin loop 구조가 rnpB gene의 발현에 중요한 역할을 하는 것으로 밝혀졌다.
Linear motor의 2次 導體板의 速度變化에 따른 諸特性에 관한 硏究
張錫明,李殷雄 충남대학교 공업교육연구소 1978 論文集 Vol.1 No.2
Linear motors, for several years the subject of much speculation, have at last reached the stage where their practical application to high speed transport systems and the other many industrial filds is within sights. However, the essential difference between Linear induction motors and ordinary induction motors is the fact that the air gap is open in the former, while it is closed in the latter. In this study, the characteristic equation of a double sided short stator Linear induction motor excited by equivalent current sheet having a linear current density was derived using Maxwell's electromagnetic field thory with its entry, and exit, end effects taken in to consideration. According to the treatment of several physical phenomena in the air gap i.e. the magnetic flux density distributions thrustforce, forward travelling wave with decay, the fundamental data in this study are made reference to improve the characteristics of Linear induction motors, effectual electric-thrustforce energy conversion devices.
분무건조법을 이용한 방출 제어형 케토로락 고형지질마이크로스피어의 제제설계
윤재남,이은미,김동우,박용근,전일순,이계원,지웅길 충남대학교 약학대학 의약품개발연구소 2003 藥學論文集 Vol.18 No.-
Ketorolac (KA) and ketorolac tromethamine (KT) is the nonsteroidal anti-inflammatory drugs (NSAIDs) and has been used widely. To improve its frequent administration by control of drug release. we prepared SLM of KA and KT using Mirj 45 and 52 as surfactants and tripalmitin and tristearin as lipids by spry drying method SLM, as a disperse system for injection, were evaluated by measurement of particle sizes. SEM and drug release pattern As a result. spherical SLM were prepared and their particle size were in the range of 25-125 μm, which were dependant on the types and contents of lipid and sururfactants. Their dissolution rate were decreased as increasing lipid contents.