소득작물 전후작지 적응 극단기성 벼 ‘중모 1032’

손영보,이종희,조준현,이지윤,오성환,송유천,박동수,박노봉,김상열,여운상,남민희,권영업 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2

흉부 위국소화 감각 수준으로 발현된 경부 추간판 탈출증

이보람,조동신,윤신구,조상걸,안무영,성기범 대한신경과학회 1999 대한신경과학회지 Vol.17 No.5

흰쥐 경동맥 풍선손상 모델에서 리포좀 전달체를 이용한 에스트로겐의 국소전달 효과

윤영섭,장양수,정광회,박요석,김형관,강웅철,권진욱,정보영,조상호,김성순 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

티타늄 함유 제올라이트 베타 촉매의 합성, 물성조사 및 반응특성 연구

윤보상,안화승 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.1

티타늄 함유 제올라이트 베타(Ti-beta) 촉매를 5가지 수열합성 방법과 알콕사이드 또는 메탈로센을 티타늄 원으로 이용한 2가지 후처리 grafting방법으로 제조하여 제조 방법에 따른 물성 차이를 연구하였다. 모든 촉매의 UV-Vis 스펙트럼에는 제올라이트 격자구조 내에 고립되어 존재하는 티타늄에 해당하는 220㎚의 흡수밴드가 관찰되었으며, grafting 시킨 경우 나노크기의 TiO_2 cluster에 기인하는 240-320㎚의 흡수 밴드가 함께 관찰되었다. 결정 입자는 dry-gel 방법과 seed를 사용한 경우 50㎚이하, 액상 전구체의 수열합성에 의한 기존 방법이나 TiO_2/SiO_2 xcrogel 전구체를 사용한 경우는 200㎚, 불산 분위기 합성에서는 2-5㎛의 평균 입자 크기를 나타내었으며, 분자체 결정에 대한 수율은 Ti-beta(F^-)>Ti-veta(seed)>Ti-Al-beta(xerogel)>Ti-Al-beta(dry-gel)>Ti-Al-beta(conventional)의 순서로 조사되었다. Cyclohexene의 epoxidation 반응은 Ti-Al-beta(conventional), Ti-beta(seed)>Ti-Al-beta(xerogel), Ti-Al-beta(dry-gel)>Ti-beta(F^-)의 순서로 전화율이 나타났으며, epoxide에 대한 선택성은 Ti-Al-beta(xerogel)<Ti-Al-beta(conventional)<Ti-Al-beta(dry-gel)<Ti-beta(seed)<Ti-beta(F^-)의 순서로 증가하였다. Epoxide의 선택성은 알루미늄 함량과 표면의 소수성 정도에 영향을 받음을 확인할 수 있었다. Cyclohexene의 전화율과 epoxide의 선택성은 모든 촉매에서 CH_3CN을 용매로 사용할 때가 CH_3OH보다 높게 나타났다. A critical evaluation of synthesis recipes reported for the large pore zeolite Ti-beta was conducted after a series of titanium containing zeolite beta were prepared by five different hydrothermal synthesis and in two post-synthetic grafting methods using alkoxide or metallocene as a titanium precursor. All Ti-beta prepared by different synthesis routes showed a narrow charge transfer band centered at ca. 220㎚ in UV-Vis spectra, typical of Ti sites isolated in zeolite framework. For those prepared by grafting, the absorption band at 240-320㎚ attributed to nano-sized TiQ clusters were also detected. Particle size of Ti-Al-beta(dry-gel) and Ti-beta(seed) were below 20㎚; Ti-Al-beta(conventional) and Ti-Al-beta(xerogel) below 200㎚; and Ti-beta(F^-) ca. 2-5㎛. Yield of zeolite crystals decreased in the order Ti-beta(F^-)>Ti-veta(seed)>Ti-Al-beta(xerogel)>Ti-Al-beta(dry-gel)>Ti-Al-beta(conventional). For cyclohexene epoxidation, conversions varied in the order Ti-Al-beta(conventional), Ti-beta(seed)>Ti-Al-beta(xerogel), Ti-Al-beta(dry-gel)>Ti-beta(F^-)> with epoxide selectivity in the order Ti-Al-beta(xerogel)<Ti-Al-beta(conventional)<Ti-Al-beta(dry-gel)<Ti-beta(seed)<Ti-beta(F^-). The epoxide selectivity was affected by aluminum content and hydrophobicity of the material. Cyclohexene conversions and epoxide selectivities were higher in aprotic CH_3CN solvent than in CH_3OH.

인장력을 받는 CT형강 고력볼트 접합부의 감소계수 U값에 관한 연구

윤성호,김진숙,김원식,신영록,김보영,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

The purpose of this experimental study is to investigate the validity of code equation and table to calculate the reduction coefficient for effective net area in the limit state design code of steel structure and offer the basic research data for the effective net area of tee shape members in tension. The experimental tests were performed by loading the specimens through the flange with high strength bolt. Length of connection, number of bolt and the eccentricity are the parameters in test. According to result, the failure loads in test is less than predicted loads and it well showed when the predicted loads are based on reduction coefficient of the table in code. The lateral buckling of stem occurred in the members with big eccentricity and it reduce the failure loads. Therefore, we thought that an additional tests and research on the factors of effective net area is required.

열대 지역에서 통일형 초다수성 벼 품종의 생육 및 수량성 비교

이지윤,준현,성환,손영보,송유천,한상익,박동수,권영업,이철원,이종희 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2

새로운 isoquinoline 유도체, AQ44의 혈관평활근 수축에 미치는 영향

김보경,김윤선,용준환,장병준,박태규,조성일,장기철,이상목 한국노화학회 1998 한국노화학회지 Vol.8 No.3

옥소바나듐(Ⅳ)-카르복실레이트 착물의 자기적 및 적외선 분광학적 성질

沈允輔,崔星洛,朴鍾烈 부산대학교 물성연구소 1986 물성연구소연구논문집 Vol.6 No.-

카르복실기를 갖는 리간드들과 옥소바나듐(Ⅳ)사이에 형성되는 착화합물(VO(picn)₂,VO(htmq)₂, VO(quin)₂ 및 VO(pyra)₂ㆍ2H₂O)들을 합성하여 그들의 IR 및 자기적 특성을 조사하였다. 이들의 자화율 값과 V=O결합의 신축진동수 값으로부터 VO(picn)₂및 VO(htmq)₂ 착화합물에 있어 강한 분자간 상호작용이 존재하는 것으로 추정하였다. IR데이타를 그거로할 때 4개의 옥소바나듐(Ⅳ) 착물들에 있어 카르복실기는 모두 한자리 배위자로서 작용함을 알 수 있었다. 자유리간드와 옥소바나듐 착물의 IR스펙트럼을 비교 검토함으로써 중심원자와 리간드주게원자들로 구성되는 배위권에서의 기본진동 형태를 분류하고 착물 형성후 나타난 새로운 IR흡수띠들을 분류한 진동 형태와 대응시켰다. Four oxovandium(Ⅳ) complexes with carboxylate ligands, VO(picn)₂, VO(htmq)₂, VO(quin)₂ and VO(pyra)₂ㆍ2H₂O have been prepared and studied. Infrared spectral data coupled with the results of magnetic susceptivility study strongly suggest that there are relltively strong intermolecular interactions in VO(picn)₂ and VO(htmq)₂. In all oxobanadium(Ⅳ) complexes studied in this work, the carboxylate ligand coordinates to the metal ion in the unidentated fashion. Some fundamental vibration modes of oxovanadium(Ⅳ) complexex were empirically assigned from the difference in the spectrum of metal complex with free ligand.

관상동맥 스텐트 시술 후의 재협착에 관한 연구

김윤철,이정우,김보영,강정아,임대승,이민수,김정희,성보영,최성준,성인환,전은석 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.1

Coronary stent implacement is known as an effective treatment in the intimal dissection after percutaneous transluminal coronary angioplasty and the prevention of restenosis. However, In-stent restenosis still remains a major concern in clinical stenting. The stents were placed in 103 patients from July 1996 to March 1999 and performed follow-up coronary angiograms in 59(57.3%) patients. To identify the clinical, angiographic and procedurerelated variables 'which predict late restenosis within the stented artery, 59 patients(58.3±9.9, M:F= 41:18) were studied. The clinical characteristics of the patients were stable angina in 23(39.0%), unstable angina in 14(23.7%), acute myocardial infarction in 21(35.6%) and old myocardial infarction in 1(1.7%). Coronary stenting was performed in 1 patient(1.7%) for primary lesion, 50 patients(84.7%) for suboptimal results after PTCA, 6 patients(10.2%) for bail-out procedure, and 2 patients(3.4%) for restenotic lesions. All patients were treated with aspirin and ticlopidinc. The follow-up angiograms were obtained at 7±4 months. The overall in-stent restenosis rate was 27.1%. The coronary angiographic findings were 32 single vessel(54.2%), 19 two vessel(32.2%) and 8 three vessel disease(13.6%). The angiographic morphological characteristics were type A in 33(55.9%), type B in 14(23.7%), type C in 12(20. 3%) cases. Variables of 16 patients with restenosis were compared with those of 43 patients without restenosis. Previously known predictors for in-stent restenosis were multiple stenting, stenting for restenotic lesions, residual stenosis after stenting, stenting for total occlusion lesions, reference diameter, balloon to vessel ratio, acute gain and minimal luminal diameter after procedure, design and characteristics of stents, ostial lesion of aorta, high pressure method for stenting, lesion length, diabetes mellitus, size of artheroma, saphenous vein grafts, ulcerlating lesions and calcified lesions. In this study, Reference diameter before stenting(2.43±0.54mm vs. 2.88±0.65mm, p=0.016) and balloon-to-artery ratio(1.28±0.26 vs. 1.11±0.18, p=0.006) were predictors for in-stent restenosis. 1) The overall in-stent restenosis rate was 27.1%. 2) In the analysis of predictors for in-stent restenosis, there was no significant differences in clinical, angiographic factors between group with restenosis and without restenosis. But, Only reference diameter before stenting and balloon-toartery ratio were predictors of late in-stent restenosis. In conclusion, stenting is effective revascularisation method for selected patients with ischemic heart disease, and to minimize in-stent restenosis rate, stent implanting is achieved in a large vessel on the basis of an artery-to-stnet ration of 1:1, if possible.

컴퓨터 면역시스템 개발을 위한 생체 면역시스템 모델링

선상준,심재윤,심귀보 중앙대학교 정보통신연구소 2000 정보통신연구소논문집 Vol.2 No.2

본 논문은 생체 면역시스템의 자기와 비자기를 구분하여 인식하는 세포독성 T세포의 특징을 이용하여 컴퓨터에서 자기 파일과 비자기 파일을 구분할 수 있는 T세포를 모델링하였다. 모델링한 T세포는 MHC 인식부와 향원 인식부로 구성되며 각각의 인식부를 이용하여 비자기 파일에 적용시켜 자기-비자기 구분이 가능함을 컴퓨터 시뮬레이션을 통하여 입증하였다. Biological immune system distinguishes nonself from self-body and protects self intrusion such as virus, pathogenic bacteria. In this paper, we make a model of the T-cell of immune system to apply to computer immune system. The modeled T-cell possesses the ability to be able to distinguishes self files from random files in computer. The T-cell consists of MHC perception and antigen perception, and distinguishes self from non-self through matching file which we must test. We verify the effectiveness of the proposed method by applying self-nonself discrimination in a computer virus.