중부지역 옥수수 파종기에 따른 생육단계 및 수량성 변화

서종호, 문중경, 정건호, 서민정, 구자환, 박장환, 배환희, 신성휴, 권영업 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

Maize hybrids were planted on April 1, April 25, May 20 and June 15 in 2012, 2013 at the experimental paddy and upland fields in Suwon city , respectively to know changes of growth stage and yield according to different planting time. Maize planting on April 1 was not recommended because total growing days at planting on April 1 was not different with that at planting on April 25 due to many days from planting to emergence over 20 days at planting on April 1. Total growing days were not much different among three planting time after April 25 because days from silking to maturity was lengthened though days from planting to silking was shortened at later planting time. Stalk weight was decreased as planting time was delayed, particularly at planting times after May 20 at paddy field by excess water injury during early growth stage. But, grain yield was not low as in May and June. It is needed to introduce early maturity maize variety as Yanganok at late planting for higher grain yield and enough time for soil preparation for next winter crops

Cellulose Triacetate 막에서 CD₂ 와 CH₄혼합기체의 투과

배성렬,노상호,이규훈 한양대학교 에너지 ·환경기술연구소 1995 에너지·環境技術論文集 Vol.2 No.-

Cellulose Triacetate막에서 CO₂의 수착실험은 pressure decay method에 의해서 행하였고, 수착실험의 온도범위는 50℃, 60℃이고 압력범위는 13atm 까지 가압하여 수착 등온선을 측정하였다. 이런 조건하에서는 CO₂의 수착평형은 Dual-mode sorption model에 의한 이론치와 실험치가 비교적 일치한다는 것을 알 수 있다. Dual-mode sorption model 수착 매개 변수들은 비선형 최소 자승법으로 구하였다. 투과실험은 같은 온도 조건과 25atm까지의 압력 범위까지 수행하였다. 실험에서 얻은 평균투과계수의 압력의존성은 고온, 고압에서 기존의 Dual-mode mobility model로는 설명할 수 없었다. 이런 현상은 기체 분자에 의한 가소화 현상 때문으로 생각할 수 있다. 따라서 modified dual-mode mobility model을 적용시킨 결과 잘 일치하였다. 또한 CTA막에서 CO₂와 CH₄혼합기체의 투과 실험을 40℃, 50℃, 60℃의 온도 범위와 25 atm의 압력 범위 하에서 행하였다. 순수 기체에 비해서 복잡한 혼합 기체의 투과를 설명하기 위해서 Dual-mode mobility model을 적용시켜 보았고 잘 일치하는 것을 알 수 있었다. 또한 혼합 기체의 거동에서 CO₂을 고려한 부분투과계수를 구하였다. 이때의 부분투과계수의 압력 의존성이 Dual-mode mobility model에 잘 일치하는 것을 알 수 있었다. The sorption isotherms of CO₂in cellulose triacetate membrane sample were measured by a pressure decay method to examine the sorption model of CO₂. And the permeation experiments were perfomed by variable volume method to analyze the permeation model of CO₂. Sorption experiments carried out 50, 60℃ and pressure up to 13 atm in cellulose triacetate. The sorption equilibria of CO₂at these temperature range can be simulated well by dual-mode sorption model. The values of the dual-mode sorption parameter were estimated by the non linear least square method. Permeation runs were carried out at same trmperature and pressure to 25atm. The pressure dependence of mean permeability of CO₂at these temperature range couldn't accurately be simulated by a dual-mode mobility model because of the plasticization action of sorbed gas in the polymer membrane. But more satisfactorily simulated by a modified dual-mode mobility model. An analytical solution has been obtained for the dual-mode mobility model extended to a binary gas mixtures to describe the pressure dependence of mean permeablity for CO₂and CH₄in the cellulose triacetate membranes. Binary gas of permeation rate measured at 40, 50, 60℃ and upstream pressure 25atm. Mean permeability of each component in a binary gas were calculated by the basis of the dual-mode mobility model.

열공형과 비열공형 피질하 혈관성 치매에서 위험인자의 차이에 관한 비교 연구

배희준,정지향,유경호,나덕렬,김상윤,최경규,양동원,손의주,이상도,김재우,박경원,김응규,이재홍,박미영,한일우,함동석,최문성,하충건,최성혜,이애영,이병철,한설희 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.2

Backgrounds and Objectives: Vascular dementia is a group of dementing disoders arising from various stroke syndrome. Among these. subcortical ischemic vascular dementia (SIVD) is regarded as a relatively distinct clinical entity. However, MRI patterns of SIVD are not homogenous. In some patients, lacunes are dominant, and in others, subcortical white matter changes are. This study was designed to compare risk factor profiles between SIVD with and without multiple lacunes. Methods: We divided 47 subjects (22 males, mean age. 68 years) recruited from VADAPET (Multicenter Trial For Evaluation Of The Changes In the PET Images Of Subcortical Vascular Dementia Patient) study into two groups one with more than 5 lacunes in deep gray matter (lacune group) and the other with 5 or less(non-lacune group) Clinical characteristics and laboratory findings of two groups were compared. Results: Nineteen of 47 patients (40%) belonged to the lacune group. The lacune and non-lacune groups d d not differ in the following variables: age, hypertension, diabetes mellitus, hyperlipidemia heart disease, history of stroke or TIA, history of trauma or major surgery, family history of hypertension stroke, or dementia, age at diagnosis of dementia, body mass index, white blood cell count, ESR, CRP, fibrinogen, hemoglobin A1C, total cholesterol. LDL cholesterol creatinine, proteinuria, glucosuria, and microhematuria. However, male sex, smoking alcohol. hemoglobin, and HDL cholesterol were possibly associated more with lacune group SIVD than with non-lacune group (p<0 1) Multivariate analyses revealed that smoking, hemoglobin, and HDL cholesterol were independent predictors of SIVD with multiple lacunes Conclusion: Our study suggests that SIVD with multiple lacunes may be significantly different in smoking habits hemoglobin, and HDL cholesterol from SIVD without multiple lacunes.

Bacillus stearothermophilus가 생산하는 Xylanase의 정제 및 특성

배성호,최용진 한국산업미생물학회 1991 한국미생물·생명공학회지 Vol.19 No.6

토양 분리균인 B. stearothermophilus가 생산하는 xylanase를 ammonium sulfate 분획, DEAE-Sepharose CL-6B ion exchange chromatography, Sephadex G-100 gel 여과 및 열처리 등의 과정을 거쳐 단일 단백질로 분리 정제하였다. 170,000의 분자량을 지닌 본 정제 xylanase는 pH 8과 pH 10 사이의 넓은 최적 pH를 보였으며 55℃에서 최대 활성을 나타내었다. 55℃에서 2시간의 열처리에 의해서도 활서의 손실이 거의 없을 정도로 열에 매우 안정하였으며 Co^2+와 Mn^2+에 의해서 현저한 활성화 효과를 보였다. 또한 larchwood xylan의 가수분해 산물로 주로 xylobiose와 xylotriose를 생성하였으며 약간의 xylose도 생성하였다. 따라서 본 정제효소는 endo-xylanase(EC 3.2.1.8)로 분류할 수 있었다. An extracellular xylanase of Bacillus stearothermophilus was purified to a single protein through a sequency of operations including ammonium sulfate fractionation, DEAE Sepharose CL-6B ion exchange chromatography, Sephadex G-100 gel filtration and heat treatment. The purified enzyme had a moleular weight of 170,000, the pH and temperature optima for the enzyme activity were pH 9.0 and 55℃, respectively. The activity was enhanced by Co^2+ and Mn^2+, and inhibited by Hg^2+. Pattern of hydrolysis demonstrated that the xylanase was an endo-splitting enzyme able to break down larchwood xylan at random giving xylobiose and xylotriose as the main end products.

연속파형 Nd:YAG 레이저에 의한 인코넬 600의 용접 공정변수의 연구

배신철,유영태,송성욱,신호준,나기대 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.1

The laser welding process is one of the most advanced manufacturing technologies owing to its high speed and deep penetration. Welding characteristics of Inconel 600 Alloy using a continuous wave Nd:YAG laser are experimentally investigated. The major process parameters studied in the present laser welding experiment were position of focus, laser power, travel speed. The gap and offset maintained as small as possible. Optical microscope were used to investigate the microstructures of the welded zone. The follow conclusions can be drawn the laser power and travel speed have a pronounced effect the fusion zone size and shape.

디지털 이미지 보호를 위한 효과적인 웨이브릿 변환

홍성표,박영옥,송기범,배일호,이준 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2

The use of digital imaging technique and digital contents based on internet has grown rapidly for last several years, and the needs of digital image protection become more important. For the purpose of copyright protection on digital image, the verification of authentication techniques like content authentication, ownership authentication, illegal copy and etc are needed. Digital watermarking, the invisible encryption technique to insert digital watermark into image, the sophisticated perceptual information should be used for providing transparency and robustness of images on watermarking process. In this paper, we implement the algorithm for preventing forged attack, ownership protection and authentication by transforming the wavelet algorithms in frequency domain in terms of human visual system.

Coronal flaring 전, 후 초기근관장 파일크기의 분석

황호길,박찬호,배성철 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.1

The purpose of this study was to compare the inital apical file(IAF) first file that fits to the apex in each canal before and after early flaring to analyze if the size of file to fit to the apex would increase after flaring. Eighty anterior teeth with complete apical formation and patent foramens were selected. The samples were randomly divided into 4 groups(GG, OS, GT, PT Group) of 20 teeth each. A file was fit to the apex in each canal and that size recorded. Radicular flaring were completed using different types of instruments. After flaring a file was again fit to the apex in the same manner as before and its size recorded. The results of this study were as follows: 1. The mean diameter of IAF before flaring(file diameters in mm ×10^-2) was 19.81±8.32 before and 25.94±9.21 after(p<0.05). 2. The increase in diameter of IAF was approximately one file size for all groups. 3. Ranking of increasing diameter of IAF were GG>GT>OS>PT Group. There was a statistically significant difference between before and after flaring(p<0.05). 4. Ranking of the time for flaring were GG>GT>OS>PT group. There was a statistically significant difference between GG group and other groups(p<0.05). 5. In the case without change of IAF diameter, they showed decrease in force after flaring when IAF was pulled out from root canal(p<0.05). This study suggested that early radicular flaring increases the file size that is snug at the apex, and awareness of that difference gives the clinical a better sense of canal size. Early flaring of the canal provides better apical size information and with this awareness, a better decision can be made concerning the appropriate final diameter needed for complete apical shaping.

상완골 근위부 분쇄 골절에서의 상완골 두 치환술

서중배,원중희,김용민,최의성,이호승,홍윤철 대한견.주관절학회 2000 大韓肩.주關節學會誌 Vol.3 No.2

내생적 발전모형에 관한 일 고찰 : 生産類型과 熟練類型을 중심으로 Focusing on Production Model & Skill type

박성호,김홍배 昌原大學校 産業經濟硏究所 1995 産經硏究 Vol.12 No.-

친수성으로 표면개질한 폴리설폰막의 투과플럭스

송근호,김강희,조성헌,이광래,임종호,배성수 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.1

실관막형 폴리설폰 막의 표면을 2-hydroxyethylmethacrylate(HEMA)로 코팅하였으며, 코팅인자들인 azobisisobutyronitrile(AIBN)/HEMA 성분비, 용매의 종류(물, 메탄올), UV 조사시간 등이 투과플럭스에 미치는 영향을 조사하였다. AIBN/HEMA/ 메탄온ㄹ 용액으로 코팅한 막이 AIBN/HEMA 성분비가 높고, UV 조사시간이 길수록 투과플럭스가 높았다. AIBN/HEMA 성분비가 낮으면 동일한 투과플럭스를 얻기 위하여 UV조사시간을 더 길게 하여야 하며, 특정한 AIBN/HEMA 성분비와 UV 조사시간에서 코팅한 막의 투과플럭스는 원래의 막(코팅하지 않은 막)보다 높게 나타났다. 또한, 오일에멀젼에 의한 fouling은 코팅한 막과 원래의 막에 모두 나타났지만, 코팅한 막의 fouling이 원래의 막 보다 현저히 낮았다. 즉, fouling 발생 후 코팅한 막의 수투과 플럭스(0.2683g/㎠ㆍmin)는 코팅하지 않은 막(0..448g/㎠ㆍmin)보다 약 6배 이상으로 높게 유지되었다. A hollow-fiber type polysulfone UF membrane was surface-coated with 2-hydroxyethylmethacrylate(HEMA). The effect of various coating paramters on permeation flux was investigated, such as concentration ratio of Azobisisobutyronitrile(AIBN)/HEMA, solvent (water or methanol), and UV irradiation time. The membrane coated with a solution of AIBN/HEMA/methanol showed about 2.65 times higher water flux than that coated with a solution of AIBN/HEMA/water. The membrane coated with a solution of higher AIBN/HEMA ratio and a longer UV irradiation time exhibited a higher permeation flux. The membrane coated with a solution of lower AIBN/HEMA ratio needed a longer UV irradiation time for coating to get a same level of permeation flux. In order to have a greater permeation flux than uncoated membrane, the membrane should be coated with a solution of a certain AIBN/HEMA ratio and UV irradiation time. The fouling by oil emulsion occurred to both of the coated and the uncoated membrane. However, the fouling of coated membrane was much less than uncoated one; the water flux(0.2683g/㎠·min)through the coated membrane was about 6 times higher than that(0.0558g/㎠·min) through the uncoated membrane.