서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

수치지도 및 지리정보시스템의 원리와 활용방안

이용범,이우균 고려대학교 2001 생명자원연구 Vol.9 No.-

새로운 Fluorene계 발광 고분자 합성

李愚鵬,吳東元,朴美淑,黃悳海,宋智怜,朴在均 慶北大學校 科學敎育硏究所 2004 科學敎育硏究誌 Vol.28 No.-

Poly [2,7-(9,9-di-n-hexyl-fluorene-co-9,9-dibenzylidenylflourene)-2,7diyl] was synthesized through nikel-catalyzed coupling between 9,9-disubstituted 2,7-dibromofluorene and new fluorene-based monomer, 9,9-dibenzylidenylflurene in good yield. The polymer containing new fluorene monomer, 2,7-dibromo-9,9-dibenzylidenyflu -orene, which not only has extended π conjugation, but also has sterically hinderd sudstituents at the 9-position. The polymer obtained is found to be soluble in conventional organic solvents such as chloroform and was characterized by GPC, ^(1)H NMR and ^(13)C NMR. Also the UV absorption band showed the peak of maximum absorption at 373 nm and the photoluminescence (PL) spectra emission band showed the peak at 558 nm yellowish green region.

Eu를 포함하는 발광 고분자 합성

李愚鵬,吳東元,朴美淑,黃悳海,司空恩,朴在均 慶北大學校 科學敎育硏究所 2004 科學敎育硏究誌 Vol.28 No.-

Poly (9,9-dialkylfluorene-2,7-diyl) derivatives end capped with 2,7-dibromo-9,9-dihexylfluorene and conductive fluorene substituents have been synthesized through Ni(0), the nickel-catalysed reduction with metallic zinc-mediated polymerization. When electron and hole recombined and formed a exciton in emitting layer. Singlet exciton and triplet exciton is the ratio of one to three. One is fluorescence and three is phosphorescence, but phosphorescence is almost sustained a loss. Not only to shift blue region but to increase phosphorescence efficiency, it is substituted Eu for the terminal H in this polymer chain. P1-Eu showed green emission at 533nm while P1 had at 548nm. The main emission peaks of the P1-Eu shift shorter wavelength, besides we observed another emission peaks of the P1Eu at 418nm.

EU의 Biomass를 이용한 에너지 생산

이종식,고문환,박우균,안종웅 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.3

EU 국가들의 1993년부터 1999년까지의 6년간 재생에너지 사용량 변화를 살펴보기 위하여 절대량 증가와 증가율을 조사하였다. 많은 나라들이 높은 사용량 증가 또는 증가율을 나타내었다. 초기에 재생에너지 사용이 적었던 나라들은 1999년에도 실질적인 생산량은 적지만 기간 중 높은 증가율을 보였다. 반면에 1993년에 이미 사용량이 높았던 나라들은 낮은 증가율을 보였으나 전체사용량은 높은 수준이었다. 재생 에너지 사용의 성공 여부는 보급 확대를 위해 많은 장해물들을 극복한 후에 성취될 수 있다. 보급 확대를 위한 요인들로는 정치적, 제도적, 재정적, 행정적인 지원과 기술개발, 홍보, 교육 및 훈련 등이 있다. Biomass를 이용한 에너지 생산 및 보급에 성공한 덴마크, 핀란드, 독일, 스페인 및 스웨덴의 송공 요인들을 소개하였다. In order to identify those Member State/technology combinations where there has been most success in achieving renewable energy penetration over the six-year period 1993-1999, the two selection criteria such as absolute increase and percentage of increase have been applied. Many Member States show either a large absolute increase in renewable energy output, or a large percentage of increase. Member States with only very low initial levels of renewable energy use may demonstrate rapid growth rates even though the actual quantity of output is still only small. Conversely, Member State with levels of renewable energy use that were already relatively high in 1993 show a less rapid percentage growth rate, but these Member States may still Have added significant quantities to the overall output. Successful penetration of renewable energy can only be achieved after overcoming many varied obstacles to an increase in their exploitation. Factors, which can influence the successful implementation of renewable energy projects, include political, legislative, financial administration, technological development, information, education and training. Examples of successful penetration of biomass power were shown for Denmark, Finland, Germany, Spain and Sweden.

연삭기용 직각 전자척의 자력특성에 관한 연구

이우균,이용구,맹희영 서울산업대학교 산업대학원 2000 大學院論文集 Vol.7 No.-

The new efficient square electro-magnetic chuck, which is using for the clamping devices of grinding machine, is developed in this study to improve the convenience of grinding work and to give the workpiece high parallelism and flatness without scratch or deformation. The recommended structure of magnetic cells are updated to find the most superior magnetic characteristics by using the finite element analysis and sample prototyping, The analyzed results are retrofitted to solve the drawbacks of previous models step by step by considering the characteristics such as magnetic fields, strength, distribution, and thermal deformations of magnetic chuck. Finally the most recommended models is designed to satisfy the KS specifications with commercial magnetic chuck, and the prototype chuck with this dimensions and structures is manufactured, it is also analyzed the overall characteristics of magnetic chuck and is performed the experimental investigations whether the KS specifications are satisfied.

산림경영계획의 방법론적 고찰 : I. 산림조사와 산림생장모델 I. Forest Survey and Growth Model

이우균 高麗大學校 自然資源科學硏究所 1996 自然資源科學硏究 Vol.4 No.-

Acetate와 Glucose가 혼합되어 있는 배지에서 성장하는 당근 현탁배양 세포의 diauxic growth

李宅堅,李宇成 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2

우리는 이제까지 bacteria와 yeast 등에서 관찰되어 온 diauxic growth 현상이 식물에서도 관찰되는지에 대해 연구해왔다. 우리는 이미 단자엽(벼) 현탁배양을 acetate와 glucose 가 혼합되어 있는 배지에서 성장시켰을 때 diauxic growth 현상이 있음을 보고하였다 (1). 우리는 쌍자엽식물에서도 diauxic growth가 관찰되는지 알아보기 위하여 당근의 현탁배양을 이용하여 연구하였다. 당근의 현탁배양세포를 glucose와 acetate가 혼합되어 들어있는 배지에서 성장시켰을 때 diauxic growth가 관찰되었다. Diauxic growth의 첫 번째 성장기에 acetate를 사용하고 두 번째 성장기에 glucose를 사용한다. 첫 번째 성장기에 있는 세포는 [^14C]acetate를 흡수하지만 [^14C]glucose 는 흡수하지 못했다. [^14C]glucose 흡수는 두 번째 성장기 세포에서 관찰할 수 있었다. 벼의 현탁배양 세포와 마찬가지로 당근의 현탁배양세포도 acetate를 일차적인 탄소원으로 사용하는 diauxic growth가 관찰되었다. We have been investigating acetate-glucose diauxic growth in plant. It was reported that rice (monocotyledon) suspension cells were exhibited diauxic growth on acetate (10 mM) and glucose (10 mM) medium (1). To investigate diauxic growth in dicotyledoneous plant, carrot (Daucus carota L.) suspension cells were grown on acetate and glucose medium Suspension culture of carrot exhibited diauxic growth when grown in a medium containing both acetate and glucose as carbon sources. Preferential utilization of acetate was observed in the initial growth phase of diauxic growth, whereas the second growth phase occured at the expense of glucose. Cells harvested during the first growth phase exhibited a capacity uptake of [^14C]acetate but not of [^14C]glucose. A capacity for [^14C]glucose uptake was expressed during the second growth phase. Like in rice suspension cells, in carrot suspension cells acetate was used as the primary carbon source during the acetate-glucose diauxic growth.

9 스위치 행렬변환기의 구현 및 동작특성 해석

盧澈均,金佑鉉,李武永 慶一大學校 1997 論文集 Vol.14 No.2

The dynamic characteristics of nine-switch matrix converter(NSMC), under the control strategy proposed by Venturini, is evaluated by simulations and experiments. Experiment sets are composed of the CPU part including TMS320C30, gate driver part, power supply part, A/D converter part and switch part. In this experiments, switching signal is generated in the real time by using TMS320C30. Switching frequency is increased by using 8253 counters which handle the some part of TMS320C30's calculation. In the experiment results, we can verify that the amplitude, frequency and power factor are controlled, AC-AC converter can be made up single module, and the volume of motor driving part can be reduced by excluding DC link. This experiment sets have error, which is calculation error of TMS320C30, and delay error of the counter. Furthermore researches should be focused on the minimization of these error.

새로운 청색 발광 고분자 합성

박재균,오동원,이우붕 慶北大學校 師範大學 科學敎育硏究所 2007 科學敎育硏究誌 Vol.31 No.-

Two polyfluorenes, poly[9,9-dioctylfluorenyl-2,7-diyl](P1) and Poly[9,9'-dioctyl fluorene-CO-9,9-bis(4-diphenylaminophenyl) fluoren](P2), were synthesised using the Suzuki coupling reaction. The use of bulky substituents(triphenylamine) in the main chin of P2 improves solubility but exacerbates the twisting in the main chain, further limiting the conjugation lengths and extending π-π* energy gap. The polymers possessed good solubility in common organic solvent such as Toluene, THF, chloroform and so on. The polymers characterized by ¹H-NMR, ¹³C-NMR, GC-MASS, GPC, DSC, TGA, UV -vis., PL. The initial degradation temperatures(T_(id)) of P1, P2 and ADS431BE showed respectively 416 °C, 425 °C and 407 °C, which means all of them have high degradation temperature. Glass Transition temperature(Tg) of P2 showed more high temperature than other polymers(P1, ADS431BE) because of decrease of flexibility by twisting in the main chain. The maximum absorption peak in the UV-vis spectrum of P1, P2 is located all at 390 nm. The maximum emission peaks of P1 and P2 showed all at 438 nm blue region. All of P1 and ADS431BE showed broad wavelength region and had excimer. The P2 showed sharp wavelength region and hardly had excimer. Therefore color purity of the P2 is better than P1, ADS432BE. 연구에서는 유기EL분야에 응용 가능한 새로운 Fluorene계 청색발광 고분자를 합성하기 위해서 Fluorene을 이용해서 단량체인2,7-dibromofluorene, 2,7-dibromo-9,9-dioctylfluorene(M2), 2,7-dibromo-9- fluorenone,9,9-bis(4-diphenylaminophenyl) -2,7-dibromolfluorene(M3)을 합성하였다. Fluorene의 C-9번 위치에 octyl 그룹이나 thphenylamine을 치환하여 유기용매에 잘 용해되도록하였다. P1고분자는 단량체 2,7-dibromo-9,9-dioctylfluorene(M2)을 그리고 P2고분자는 단량체 2,7-dibromo-9,9-dioctylfluorene(M2)와9,9-bis(4-diphenylaminophenyl)-2,7-dibromolfluorene(M3)을 그리고 고분자의 end-capping과 전자 수송능력을 향상시키기 위해 2-(4-bromophenyl)-5-phenyl -1,3,4-oxadiazole을 Pd(0) 촉매로 사용하는 Suzuki coupling 중합법으로 합성하였다. P2고분자에 치환된 triphenylamine은 고분자의 정공 수송능력을 향상시키는 작용을 한다. 각각의 단량체와 고분자의 구조분석은 1H-NMR, 13C-NMR, GC-MASS를 이용하여 분석하였고, 고분자의 열적분석은 DSC, TGA를 통해 측정하였고, 광학적 특성은 PL, UV-vis를 통하여 분석하였다.