캔터키 블루그래스에 의한 잔디 조성 기술 개발

이재필,조용인,서한용,이상재,김태준,한인송,김두환 建國大學校附設農業資源開發硏究所 2001 農資源開發論集 Vol.23 No.-

Seed sowing is the major method for the establishment of cool-season grasses at the soccer fields, golf courses, etc. Germination speed of kentucky bluegrass(Poa prantensis L.: KB) is much slower than the other cool-season grasses. This study was conducted to solve the problems at the early stage of establishment with KB. The best priming conditions of KB, drying method after soaking in the water, and covering materials will be selected. To reduce irrigation frequency and quantity for seed germination, seeds of KB were exposed to the different soaking temperature(4, 20, 25, 30℃). soaking durations(3, 6, 10, 13, 19, 23 days), storage periods(3, 6, 9 days), storage humidities(30, 50, 100%), shading rate(0, 50, 100%), drying methods(dry in the air, heating, mix soaked seed with profile=1:2), and covering materials(70% shade net, fiber net). The optimum soaking temperature and duration for the seed priming of KB were 20℃ and 10 days, respectively. The optimum storage period and humidity were 3 days and 100%, respectively, Under 50% shading, germination rate was the highest. In drying method after soaking, mixture of seeds and profile(1:2) was optimum for sowing. Using the thin fiber net as covering material after sowing was good for not moving seeds and improved germination speed and rate.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

가압유동층연소로에서 국내무연탄의 황산화물 배출특성

한근희,송용식,류정인,손재익,진경태 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

본 연구는 가압유동충연소로에서 국내 무연탄을 연소함에 있어서 SO_2 배출농도에 대하여 고찰하였다. Bench scale PFBC에서 석탁을 연소하는 동안에 탈황제로 식회석을 사용하였으며, 배가스의 배출특성을 조사함에 있어서 SO_2의 제어에 주안점을 두었다. 석탁은 강원도 태백지역에서 채탄된 무연탄이고, 석회석은 강원도 삼척지역에서 얻은 것이다. 실험장치는 층 직경 0.17m, freeboard 직경 0.25m이고, 총 높이가 5m로 이루어졌다. 실험은 운전압력(1-6 atm), 운전온도(850-950℃), 과잉공기(10-30%), Ca/S 몰비(0.8-4.8)의 조건으로 수행하였다. 결과적으로 최대 탈황율을 보인 층(bed)온도는 1, 2 기압일 때 850℃, 4 기압일때 900℃, 6 기압일 때 950℃로 나타났다. 또 탈황율은 모든 실험조건에서 운전압력, Ca/s 몰비, 과잉공기가 증가함에 따라 증가하였다. 국내무연탄의 가압유동충연소시 안정적인 SO_2의 배출을 위하여 각각의 운전압력에서 적정한 Ca/S 몰비는 2 기압 이하일때 Ca/S≥4.8, 4기압일 때 Ca/S=4.8, 6 기압 이상일때 Ca/S≤4.8를 보였다. This study was to investigate the SO_2 emission with Korean anthracite in a PFBC (Pressurized Fluidized Bed Combustor). This work focuses on the control of SO_2, one of the severe air pollutants in flue gas, emission characteristics by injecting sorbent during the combustion of coal in a bench scale PFBC. The coal and limestone used in this work were Taeback anthracite and Samchuck limestone, respectively, in Korea. The effects of operation parameters such as pressure (1-6 atm), bed temperature (850-950℃), excess air ratio(10-30%), and Ca/S mole(0.8-4.8) on desulfurization was investigated in PFBC(0.17m of bed diamether, 0.25m of freeboard diameter and 5.0m height). The bed temperature showing maximum sulfur capture increased from 850℃ at 1 and 2 atm. to 950℃ at 6 atm. with 10% of excess air ratio. Sulfur capture increased as excess air ratio increased at all experimental condition. Both the sulfur capture and the temperature showing maximum sulfur capture increased as operation pressure increased. It was recognized that Ca/S mole ratio higher than 4.8 was needed below 2 atm. and lower Ca/S mole ratio than 4.8 was needed at 4 and 6 atm. for the stable SO_2 emission in combustion of Korean anthracite.

수종보익제가 면역세포의 조절 및 Apoptosis에 미치는 영향

한종현,강성용,정현우,오찬호,권진,은재순 대한본초학회 1997 大韓本草學會誌 Vol.12 No.1

The effects of several tonifying prescriptions on the apoptosis of transplanted L1210 cells and the regulation of immune cells in L1210-transplanted mice were studied. Sa-Mul-Tang(SMT), Sa-Kunja-Tang(SKT), Sipjeon-Daebo-Tang(SDT) accelerated the apoptosis of transplanted L1210 cells, and SMT and SKT reduced the mitochondrial transmembrane potential of transplanted L1210 cells. SMT promoted the proliferation of thymocytes and splenocytes in L1210-transplanted mice. Whereas SMT increased CD8+ T_c/T_S cell, Bojung-Ikki-Tang(BIT) decreased CD4+ T_H cell population in the thymocytes of L1210-transplanted mice. SMT and SKT increased the lucigenin chemiluminescence from peritoneal macrophage of L1210-transplanted mice. These results indicate that SMT and SKT have an inductive action of apoptosis of transplanted L1210 cells and peritoneal macrophage activation.

임신 중기 급성 A형 간염의 치료 1예

김미영,문성택,김윤숙,전섭,최승도,선우재근,배동한 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.2

..

國民學校 兒童들의 運動傷害 調査 : focussed on 4 districts in Kangweon province 江原道內 4個地域을 中心으로

韓相俊,金龍洙,吳壽一,朴南煥,洪寬伊,兪玉在 江原大學校附設 體育科學硏究所 1983 江原大學校附設體育科學硏究所論文集 Vol.- No.8

To suggest the basic data for a precautionary measures against sports injuries and safety educaion in Elementary school boys and girls, 1,149 boys and 1,111 girls(Total 2,260 answerers) who are 4th, 5th, 6th grade of Elementary school residing 4 districts((city, farm, fishing, and mining village) in Gang-weon province were answered on the questionair which is contents, 21 numbers of questions from Oct. 3, 1982. to Nov.3, 1982. The conclusions from gained results by analyzed data are as follows: 1. The most favorite sports Boys, Baseball and soccer Girls: Running and lope jumping Especially, boys residing in city area answered that the most favorite sports is baseball, and boys residing in the other districts answered that it is soccer. 2. The time required for carry out sports. About 85% of tatal answerer carry out sports 30min. to 1 hour per day. 3. Causes of sports injuries. Taking no notice of boys and girls carelessness and insufficiency of practice on the skill is the most. The next order, foul and a dangerous place in boys and fitness difficency in girls. 4. Situation injuries. When fall down a body toward the front was the most. During mining and collision against the other body were next order. 5. Injuried places and the weather. Out-door ground was most, the weather when injuried was clear. On the other hand, over 80% of total answere injuried season were summer and fall. 6. Sports events which caused sports injuries. Boys: Mainly soccer and baseball Girls: Running and lope jumping 7. Injuried part of the body was represented following order: ①The knee ②The ankle ③Hand and the charecteristic special features of injuries were sprain and laceration in addition, its symptom was acute form of decease. 8. treatment after injuried Boys and girls care at their home but 3.9% among total answeres who were injuried, and duration of curing was and day to 30 days. 9. A trend of experience on sports injury. 84% among total answerers in boys, and 75% among total answerers in girls. Thus it shows the experience ratis are more in boys than in girls.

형질전환 조류 생산에 관한 연구

한재용 서울대학교 농업개발연구소 1999 농업생명과학연구 Vol.3 No.-

Embryonic germ (EG) cell lines established from primordial germ cells(PGCs) are undifferentiated and pluripotent stem cells. To date, EG cells with proven germ-line transmission have been completely established only in the mouse with embryonic stem (ES) cells. PGCs from 5.5-day-old(stage 28) chicken embryonic gonads were isolated and established a putative chicken EG cell line with EG culture medium supplemented with several growth factors. These cells grew continuously for 10 passages (4 months) on a feeder layer of mitotically active chicken embryonic fibroblasts. After several passages, these cells were characterized by screening with the Periodic acid-Shiff's reaction, anti-SSEA-1 antibody, and a proliferation assay. The chicken EG cells maintained characteristics of gonadal PGCs and undifferentiated stem cells. When cultured in suspension, the chicken EG cells successfully formed an embryoid body and differentiated into a variety of cell types. The chicken EG cells were injected into stage X blastodermal layer and produced chimeric chickens with various differentiated tissues derived from the EG cells. Chicken EG cells will be useful for the production of transgenic chickens and for studies of germ cell differentiation and genomic imprinting. Also, the production of transgenic chicken using these cells may be useful tools for improvement of ecionomic traits in livestocks.

밀도분포법을 이용한 부재의 연결구조 최적화

한석영,유재원,박재용 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

Most engineering products contain more than one component. Failure occurs either at the connection itself or in the component at the point of attachment of the connection in many engineering structures. The allocation and design of connections such as bolts, spot-welds, adhesive etc. usually play an important role in the structure of multi-components. Topology optimization of connection component provides more practical solution in design of multi-component connection system. In this study, a topology optimization based on density distribution approach has been applied to optimal location of fasteners such as T-shape, L-shape and multi-component connection system. From the results, it was verified that the number of iteration was reduced, and the optimal topology was obtained very similarly comparing with ESO method. Therefore, it can be concluded that the density distribution method is very suitable for topology optimization of multi-component structures.

PLD 박막의 물리적 성질

한용진,조봉균,정재훈,이수빈,박해윤,이태기,채희백,홍진수 순천향대학교 기초과학연구소 1998 순천향자연과학연구 논문집 Vol.4 No.2

Thin amorphous carbon films were deposited by a Q-switched Nd;YAG 532nm with beam power density of ?? on the high purity graphite (99.7%). The pressure of vacuum chamber was ?? Torr. In order to estimate the quality of the Pulsed Laser Deposition films one of the most important optical properties, bandgap energy, was characterized by transmission and reflection in the range of the visible, and an optical direct bandgap energy of 2.45eV and indirect bandgap energy 0.36eV were obtained. Surface morphology of amorphous film was investigated by AFM (Atomic Force Microscopy). Its surface roughness is 70nm. Comparing our results with the published values in the literature we have confidence that our films show the good quality for optical properties.

터보 차져와 인터쿨러를 장착한 디젤기관의 시뮬레이션 연구

한영출,백두성,류규현,오용석,박만재 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.4

Studies on the turbocharger itself or various aspects generated from turbocharged engine have been made. However, only a few researches have been made on the performance for the natural aspirated engine equipped with the turbocharger and the intercooler. In this study, the performance prediction program based on turbocharger theory is developed for simu-lation which may reduce the cost and the trial-and-error time. The program is verified with the experimental results for 11,000cc diesel engine with the turbocharger and the intercooler. Also, various factors which are invisible in experiment are predicted using this program.