• 한국결정성장학회지
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• 제5권4호
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• pp.378-385
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• 1995

분자션 에피텍시얼(MBE)법, 액상 에피텍시열(LPE)법과 마이크로 인상($\mu$ - PD)법 에 의한 단결정 성장에 있어서의 새로운 접근을 논의하였다. 재료로써는 Bi-Sr-Ca-Cu계, $K_3Li_2Nb_5O_{15}$계의 산화물을 사용하였으며, 비평형영역으로 부터의 고품질(균일 조성 및 저결함 밀도) 결정성장은 원자수준의 계면제어에 의해 가능함을 고찰할 수 있였다.

• 대한약학회:학술대회논문집
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• 대한약학회 2005년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.101-101
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• 2005

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 2001년도 학술 발표회 진행표 및 논문초록
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• pp.19-19
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• 2001

The genome sequencing has revealed a large number of proteins of unknown or little characterized functions that have been well conserved during evolution. It remains a great challenge to decipher the molecular and physiological functions of these proteins. One example of the evolutionarily conserved protein family with little understood function is the surE family.(omitted)

• 대한약리학회지
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• 제10권1호
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• pp.61-65
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• 1974

Berberis koreana Palibin belonging to Berberidaceae family, a common herb in Korea, has been contained some quantity of Berberine analogue and other ingredients. Authors therefore paid attention to its pharmacological actions and examined the effects on sleep duration and rectal temperature in mouse with crystal (A) from Berberis koreana Palibin in Korean native plans. The experiment searching for the effect on sleep duration was performed with pretreatment of Berberis Koreana Palibin crystal (A) 30 min before the administration of 25 % ethanol, and its crystal were also administered intraperitoneally with the intention to examine the effect on rectal temperature in mouse. The results of the experiment were as follows; 1. Crystal (A) from Berberis koreana Palibin was made by extraction with ethanol and HCI. 2. Crystal (A) enhanced the hypnotic activity of alcohol in concentratins of 0.1 mg/10g or 0.15 mg/10g. 3. Rectal temperatures in mice were significantly reduced with administration of crystal (A) in concentrations of 0.1 mg/10g or 0.15 mg/10g. 4. The maximal reduction of rectal temperature and potentiation of the hypnotic activity were observed at 30 min after its administration. From the above results, it is clear that crystal (A) from Berberis koreana Palibin exerts the potentiation of hypnotic action of alcohol and reduction of rectal temperature in normal mouse. Its pharmacological effects are probably derived from the action upon the central nervous system.

• 한국결정성장학회:학술대회논문집
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• 한국결정성장학회 1998년도 PROCEEDINGS OF THE 14TH KACG TECHNICAL MEETING AND THE 5TH KOREA-JAPAN EMGS (ELECTRONIC MATERIALS GROWTH SYMPOSIUM)
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• pp.121-125
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• 1998

Langasite is a new piezoelectric material which is similar to quartz in its acoustic behaviours. In this study, pure Langasite and Langasite family grouo powders were synthesized by the solid state reaction in air. And then diffusion of synthesized powders were controlled by B and C ions in the{{{{ { A}_{ 3} { B}_{5} { CD}_{ 14 }}}}} structure. Dielectric constant and lattice anisotripy of Langasite and family group were measured to be 17, 22~27 in the range of 1 kHz to 13 MHz and about 1.6. respectively.

• 한국결정성장학회지
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• 제9권1호
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• pp.74-79
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• 1999

Langasite($La_3Ga_5SiO_14$)는 acoustic 특성에서 quartz, $LiTaO_3$ 와 $LiNbO_3$에 비교되는 새로운 압전재료이다. 본 연구에서는 새로운 Langasite 계열의 물질을 공기 중에서 고상반응법에 의해 합성하였고, 합성공정에서의 주요 확산종 을 조사하였다. 이때 합성된 물질의 소결체를 제조하여 각각의 유전적 성질을 비교평가하였다. 또한, Langasite 단결정 을 자체제작한 Czochralski 시스댐을 사용하여 성장시키는데 성공하였고, 성장된 결정의 물성을 평가하였다

• 한국광학회지
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• 제8권3호
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• pp.223-229
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• 1997

베레만의 4 * 4행렬방정식을 써서 액정판의 편광투과특성을 분석하는 프로그램을 개발하고, 이를 써서 액정셀과 편광판의 편광투과특성을 살펴보았다. 개발된 프로그램을 써서 정상백색 모우드의 꼬인 네마틱(TNLTwisted Nematic) 액정셀에서 시야각에 따른 명암대비의 변화를 보여주는 등고선을 그려내어 그 특성을 예측할 수 있었다. 또한 편광판의 투과특성은 입사각이 커짐에 따라 투과된 빛의 편광타원의 주축이 투과축 방향에서 벗어나며 타원도가 커지는 것이 밝혀졌는데, 이 결과는 액정표시소자의 명암대비가 액정판만이 아니라 편광판의 특성에 의해서도 제한될 수 있음을 시사한다.

• 한국결정성장학회:학술대회논문집
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• 한국결정성장학회 1996년도 The 9th KACG Technical Annual Meeting and the 3rd Korea-Japan EMGS (Electronic Materials Growth Symposium)
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• pp.508-508
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• 1996

;The growth of films have considerable interest in the field of superlattice structured multi-layer epitaxy led to realization of new devices concepts. Molecular beam epitaxy (MBE) with in situ observation by reflection high-energy electron diffraction (RHEED) is a key technology for controlled layered growth on the atomic scale in oxide crystal thin films. Also, the combination of radical oxygen source and MBE will certainly accelerate the progress of applications of oxides. In this study, the growth process of single crystal films using by MBE method is discussed taking the oxide materials of Bi-Sr-Ca-Cu family. Oxidation was provided by a flux density of activated oxygen (oxygen radicals) from an rf-excited discharge. Generation of oxygen radicals is obtained in a specially designed radical sources with different types (coil and electrode types). Molecular oxygen was introduced into a quartz tube through a variable leak valve with mass flowmeter. Corresponding to the oxygen flow rate, the pressure of the system ranged from $1{\;}{\times}{\;}10^{-6}{\;}Torr{\;}to{\;}5{\;}{\times}{\;}10^{-5}$ Torr. The base pressure was $1{\;}{\times}{\;}10^{-10}$ Torr. The growth of Bi-oxides was achieved by coevaporation of metal elements and oxygen. In this way a Bi-oxide multilayer structure was prepared on a basal-plane MgO or $SrTiO_3$ substrate. The grown films compiled using RHEED patterns during and after the growth. Futher, the exact observation of oxygen radicals with MBE is an important technology for a approach of growth conditions on stoichiometry and perfection on the atomic scale in oxide. The oxidization degree, which is determined and controlled by the number of activated oxygen when using radical sources of two types, are utilized by voltage locked loop (VLL) method. Coil type is suitable for oxygen radical source than electrode type. The relationship between the flux of oxygen radical and the rf power or oxygen partial pressure estimated. The flux of radicals increases as the rf power increases, and indicates to the frequency change having the the value of about $2{\times}10^{14}{\;}atoms{\;}{\cdots}{\;}cm^{-2}{\;}{\cdots}{\;}S^{-I}$ when the oxygen flow rate of 2.0 seem and rf power 150 W.150 W.

• 한국결정성장학회:학술대회논문집
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• 한국결정성장학회 1998년도 PROCEEDINGS OF THE 15TH KACG TECHNICAL MEETING-PACIFIC RIM 3 SATELLITE SYMPOSIUM SESSION 4, HOTEL HYUNDAI, KYONGJU, SEPTEMBER 20-23, 1998
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• pp.73-77
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• 1998

Langasite(La3Ga5SiO14) is a new piezoelectric material which is similar to quartz, LN(LiNbO3) and LT(LiTaO3) in its acoustic behavior. In this study, pure Langasite and Langasite family groups were synthesized by the solid state reactions in air. For the synthesis process, diffusion species were investigated and sintered body of synthesized powders were studied on dielectric property according to surface microstructures.

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 1999년도 학술발표회 진행표 및 논문초록
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• pp.34-34
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• 1999

TRAIL (also known as Apo-2L) is a newly identified cytokine belonging to the large tumor necrosis factor (TNF) family. TRAIL is a novel molecule in that it induces apoptosis in a wide variety of tumor cells but not in normal cells. In order to help elucidating its biological roles and designing mutants with improved therapeutic potential, we have determined the crystal structure of human TRAIL.(omitted)