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임기조,박수길,이주성,손원근,조성렬 한국공업화학회 1998 응용화학 Vol.2 No.2
Electroluminescence(EL) which was founded by Lossew first in 1923, then powder type by Destriau in 1936, mutiinsulating structure by Russ and Kennedy in 1967, multicolor EL by King and Tuenge in 1982, come from the light emission obtained by electrical excitation energy passing through a phosphor layer under applied high electrical field(10^6V/cm). In this work, we introduced laser dyes to ZnS:Cu phosphor. White, yellow and blue was acquired with different kinds of phosphor. By doping laser dyes to former phosphor, red to violet may be come true. Basic structure is ITO/Phospher /Insulator/Carbon. Silk screen method was used for fabricating ELD. Applied high electric field to ELD doping with laser dyes, Luminance was not controlled by laser dyes, not reducing luminance and any other properties. more than 100cd/m² was performed at 400Hz, 1.5kHz.
평판형 윅을 갖는 소형 루프 히트파이프의 윅 건조한계에 대한 해석적 연구
유성열(Seong-ryoul Ryoo),성병호(Sung-ho Byung),최지훈(Ji-hoon Choi),김철주(Chul-ju Kim),임광빈(Kwang-bin Lim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
In principle of LHP operation it is assumed that the evaporation of working fluid takes place at the interface of heating wall and the primary wick, admitting the complete saturation of porous wick with the liquid phase. But it has been found from lots of experimental investigations that the line of vapor-liquid meniscus draws back toward the center of the wick with an increasing heat load, showing the existence of a dried zone. The appearance of dried zone changes the flow mechanism through the wick, resulting in increasing the pressure drop over the wick. This is the origin of wick dry limitation for LHPs. The quantity of wick dry limitation seems to lie on the depth of dried zone but in reality it is a complicate matter to predict the vapor front line as a function of wick geometry parameters, fluid properties and rates of heat supply. In this study wick limitation was measured from experiments using the given LHP model developed for the present study and the data were put to evaluate the existing depth of dried zone as a function of heat rates.
이주성,김재용,박수길,임기조,조성렬 한국공업화학회 1998 응용화학 Vol.2 No.1
Electroluminescence is the light emission obtained by an electrical excitation energy passing through a phosphor under an applied high electrical field. The preparation and characterizations of light emitting ACPEL(alternating-current powder electroluminescent) cell based on ZnS:Cu powder are discussed. ACPEL device is useful for large flat panel display. Phosphor used in this work was prepared following conventional method with ZnS, CuBr₂ mixed powder at 1200℃. The structure is IT0/Insulating layer/Active layer/Insulating layer/Silver paste. Basic properties of insulating layer and binder used in this work was investigated to understand the effect of dielectrics.
Development of yellow and blue phosphor and their emission properties
Park Soo-Gil,Cho Seong-Ryoul,Son Won-Ken,Lim Kee-Joe,Lee Ju-Seong The Korean Electrochemical Society 1998 한국전기화학회지 Vol.1 No.1
Electroluminescence (EL) comes from the light emission obtained by the electrical excitation energy passing through a phosphor layer undo. an applied high electrical field $(10^6 V/cm)$. The preparation of white and blue phosphors and characterizations of light emitting alternating current powder electroluminescent devices (ACPELDs) were investigated. In this work, we fabricated two kinds of ELDs, that is, yellow electroluminescent device (B-ELD), blue electroluminescent device (B-ELD). The basic st.uctures of Y-ELD and B-ELD are ITO (Indium Tin Oxide)/phosphor layer/Insulator layer/Carbon electrode and ITO/Phosphor layer/Insulating layer/carbon electrode, respectively. Another structures of ITO/Phosphor and Insulator mixture layer/Backelectrode are introduced. EL spectra and luminance of two types of ELDs were measured by changing voltage at fixed frequency 0.4kHz, 1.5kHz. Blue and yellow phosphors prepared in this work show $50cd/m^2\;and\;30cd/m^2$ of luminance at 400Hz, 150V.
Varietal Responses of Pollen Development to Salt Stress in Barley
Safiq Rehman,Hee-Sun Kook,Jeong-Hyun Lim,Myoung-Ryoul Park,Jong-Chul Ko,Kwang-Geun Park,Jae-Seong Choi,Tae-Il Park,Jung Gon Kim,Kyu-Sung Lee,Yong Won Seo,Jin-Key Kim,Kyeong-Gu Choi,Song Joong Yun 韓國作物學會 2004 Korean journal of crop science Vol.49 No.5
Thirty-nine out of eighty-five barley varieties/strains survived until heading stage in the saline experimental field (0.03-0.05~%~;salt) and they were used for pollen study. Light and scanning electron microscopic observations revealed two distinctive types of barley pollens: one transparent and small in size and the other dark and larger. In addition, both types of pollens were stained with Alexander's stain and it was found that the smaller and transparent pollen was cytoplasm-devoid (CD) while the larger pollen was cytoplasm-rich (CR). Sixteen out of 39 barley varieties/lines grown in the saline soil had CR pollens, which were rarely observed in the barley plants grown in the non-saline soil. Moreover, it was observed that salt stress severely reduced seed setting in the varieties having degenerated pollens. These results suggest that salt stress affects the fertility of barley pollen. The sterile pollen was undersized and lack of cytoplasm probably due to abortion. Furthermore, a varietal difference existed in the response of pollen development to salt stress.
Varietal Responses of Pollen Development to Salt Stress in Barley
Rehman Safiq,Kook Hee-Sun,Lim Jeong-Hyun,Park Myoung-Ryoul,Ko Jong-Chul,Park Kwang-Geun,Choi Jae-Seong,Park Tae-Il,Kim Jung Gon,Lee Kyu-Sung,Seo Yong Won,Kim Jin-Key,Choi Kyeong-Gu The Korean Society of Crop Science 2004 Korean journal of crop science Vol.49 No.5
Thirty-nine out of eighty-five barley varieties/strains survived until heading stage in the saline experimental field $(0.03-0.05\%\;salt)$ and they were used for pollen study. Light and scanning electron microscopic observations revealed two distinctive types of barley pollens: one transparent and small in size and the other dark and larger. In addition, both types of pollens were stained with Alexander's stain and it was found that the smaller and transparent pollen was cytoplasm-devoid (CD) while the larger pollen was cytoplasm-rich (CR). Sixteen out of 39 barley varieties/lines grown in the saline soil had CR pollens, which were rarely observed in the barley plants grown in the non-saline soil. Moreover, it was observed that salt stress severely reduced seed setting in the varieties having degenerated pollens. These results suggest that salt stress affects the fertility of barley pollen. The sterile pollen was undersized and lack of cytoplasm probably due to abortion. Furthermore, a varietal difference existed in the response of pollen development to salt stress.
로다민과 TPD 혼합형 유기초박막의 EL 소자의 표면특성
박수길,조성렬,손원근,이창진,조병호,임기조,이주성 ( Soo Gil Park,Seong Ryoul Cho,Won Keun Son,Chang Jin Lee,Byung Ho Cho,Kee Joe Lim,Ju Seong Lee ) 한국공업화학회 1997 응용화학 Vol.1 No.1
High performance organic electroluminescent(EL) devices which are composed of organic thin multilayer films are fabricated. The basic structure is hole-transport layer, emitting layer and electron transporting layer. The hole-transporting layer is an amorphous diamine film in which the only mobile carrier is the hole. The emitting layer is consisted of a host material(Alq3) and a guest emitting materials(Rhodamine 101 perchro-late(Red3)). The microscopic study on emitting layer was performed by confocal image system. In this study, we could good result with varing the thickness of emitting layer, 100Å of emitting layer with 3% of Red3 had a 2.3E+0.4(Alq3) and 1.65E(Red3) of EL, at 11V, operating voltage.
구강암 적출후 경부 도상 피판을 이용한 구강내 결손부의 재건 -3 치험례-
이성근,임종수,김경현,전소연,조영성,신상훈,조영철,성일용,김욱규,김종렬,정인교,양동규,LEE, Seong-Geun,LIM, Jong-Soo,KIM, Kyung-Hyun,JEON, So-Yeun,CHO, Young-Sung,SHIN, Sang-Hun,CHO, Young-Cheol,SUNG, Iel-Yong,KIM, Uk-Kyu,KIM, Jong-Ryoul,C 대한악안면성형재건외과학회 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.3
이상에서 저자 등은 $T_{1-3}$의 편평상피 세포암의 3증례에서 적출 후 연조직 결손부의 재건을 위해 Tashiro 등에 의해 변형된 Farr등의 경부 도상 피판을 이용하여 술후 특이한 합병증 없이 성공적인 결과를 얻을 수 있었다. 피판 작도시 부피의 한계와 경부 임파절의 전이나 혹은 예방적으로 경부에 3 Gy 이상의 방사선을 투여 받은 환자에서의 사용의 제한점에도 불구하고, 경부도상 피판은 결손 부위에 따른 피판의 다양한 변형이 가능하며, 적출과 동시에 빠르고 간단하게 효과적으로 결손부를 재건할 수 있으며, 공여부에 대한 피부이식이 필요하지 않고, 부가적으로 수술 시간과 입원 기간의 단축을 초래해 환자들의 삶의 질을 높일 수 있다고 사료된다. Many myocutaneous flaps have been used for the reconstruction of intraoral defects caused by the excision of oral cancer. Among these myocutaneous flaps, cervical island flap has been introduced by Farr et al. Although different in detail, this flap was designed as the platysma myocutaneous flap by Futrell et al in the supraclavicular site. Since many authors applied this flap to cover intraoral defect, they discussed deeply the blood supply of this flap. To improve further flap survival, it was modified by Tashiro et al. This flap makes its vascularity highly reliable. The amount of tissue needed for reconstruction can be accurately planned. The surgical and reconstruction procedure can be performed simply, rapidly, and effectively. Oral functions including deglutition, speech, and denture fitting are not compromised. With it's minimal deformity, new donor fields is not necessory. Of course, we keep in mind that this flap has limitations in patients where much bulk of tissue defects is needed and more than 3000 rad radiation due to the metastasis of neck lymph node is exposed. In three patients with intraoral squamous cell carcinoma($T_{1-3}N_0M_0$), we performed induction chemotherapy with FP regimen including pepleomycin. Thereafter, we ablated oral cancer and peformed reconstruction of intraoral defects with cervical island flap designed by Tashiro et al. Due to these significant benefits and minimal limitations, we have found that this flap is adequate for reconstruction of most intraoral defects following cancer ablation.