유산균(L.lactis CBT-8)및 발효 추출물의 Helicobacter pylori 억제 능력

진춘조,박형석,이혜운,김성렬,강동구,이준상,이재동,왕준호 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

Helicobacter pylori infection was the cause of chronic gastritis, duodenal ulcer and gastric MALT lymphoma. The eradication rates of H. pylori using antibiotics are around 80%. Lactobacilli have been demonstrated to have in vivo and in vitro inhibitory effects on H. pylori infection. We aimed to evaluate the inhibitory effect of L. lactis CBT-8 and its extract on H. pylori in human stomach. Thirty-five H. pylori-infected volunteers(30-49 yr)were randomized into two groups which were treated with L. lactis CBT-8 and its extract(Group A n=17) or milk containing L. lactis CBT-8(Group B, n=18). They underwent 13C-urea breath tests before and after treatment. The DOB30 of group A(n=14) was decreased 41.0% after treatment(26.0±4.9 before, 15.3±2.1 after treatment)(p<0.05). the DOB30 of group B(n=13) was decreased 22.3% after treatment(22.0±2.2 before, 17.1±1.7 after treatment)(p<0.05). In conclusion, L. lactis CBT-8 was effective in suppressing H. pylori infection in human stomach.

수용액 중에서 고분자 전자주게와 전자받게의 착체형성에 대한 연구

장춘학,류필조 世明大學校 1998 世明論叢 Vol.7 No.-

Under various surrounding conditions, the complexation between polymeric electron-donnor(poly acrylic acid) and elecron-acceptor (poly ethylene oxide and poly vinyl alcohol) througy secondary force in aqueous media hs been studied by using GPC, UV, PH meter and Ubbelohde type viscometer. It is found that the type and active site for complexation are influenced by the bothe of functional group of electron-donnor and elecron-acceptor. The addition of inorganic salts in water seemed to impede the secondary force bonded complexation. The results could be explained in terms of hydrodynamic dimension and elecrostatic interation included.

한국 핸드볼 경기의 내용분석과 미래방향 : Content Analysis and Future Directions

박천조,백상서,채병준,안길영 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1

This study is to investigate the researches with handball game by research domain and methodological aspects during its 10years (1990-2000). As results of analyzing methodological structure, characteristics of subjects by research domain and the number of articles statistical techinics by years. 1. the researches of handball games need longitudinal study with academic arena in accordance with the globalization trends. 2. The number of case and representative is to provide academic suport therefore it is nesessary to provide effect size for handball games for identify susficious questions sample sizes for students and professors in the field of measurement & evaluation 3. It is proud to acculately need to test methodological research domains in order for performing handball related researches journal to be acknowledged by scholars in other parts of the world. the focus must be on equality rather than on quantity.

시간주기와 공간주기 유동에서의 새로운 사상법 연구

임춘규,김시주,김시조 안동대학교 기초과학연구소 1996 基礎科學 硏究論文集 Vol.7 No.1

Recently, we have successfully developed the chaotic mixing device termed "Chaos Screw" in single-screw extrusion processes. In order to understanding the details of residence tunes, Poincare sections and mixing patterns for Chaos Screw, one has to evaluate the particle trajectories efficiently and accurately over the entire region of the Chaos Screw, which require a tremendous computation time if one simply in tegrates the velocity fields by Runge-Kutta method. The present paper intruduces a new mapping method to determine th particle trajectories efficiently and accurately. With tins new method, the numerical troble can also he circumvented near the wall surfaces. For computational efficiency and accuracy, the proposed method was found to be powerful com pared with the Runge-Kutta method.

서울시 오존의 통계적 단기예측모형에 관한 연구 : A case of seoul city

김조천,전의찬,전진 동신대학교 환경연구소 2002 환경연구 Vol.7 No.1

본 연구에서는 오존의 당일예보모형 2개(중회귀모형, 판별분석모형)를 선정하고 상호 비교·평가함으로써 모형들이 갖는 특성을 대기오염 관리대책에 반영시키기 위한 연구를 수행하였다. 고농도 오존계절의 분석 결과로부터 4월~8월의 5개월(153일)간의 기간을 광화학스모그 발생가능성이 높은 계절로 선정하였고, 오존농도의 일변화 특성은 오전 8시경부터 점점 증가하다가 오후 2~4시경에 최고점에 달하는 것으로 나타났고, 오존농도의 지역특성을 요인분석을 통하여 분석한 결과, 서울시 전체지역(최소한 반경 15km 이내)의 오존농도 변화특성을 하나의 모형으로 설명하는 데 큰 무리가 없음을 알았다. 모형작성 및 검정·검증을 행하고 상호 비교한 결과, 판별분석 모형이 예상했던 바와 같이 임의의 고농도일 만을 주목한 경우에는 중회귀모형 보다 약간 더 좋은 결과를 보여 주었고, 전반적인 경우에는 두 모형이 비슷한 결과를 나타내었다. Based on of analyzing the season of high level of Ox(Oxidant), five months from April to August were selected. As a result of investigating the weather effect on high level of Ox days and the diurnal variation of Ox, it was observed that the temperature was comparatively high, the wind velocity was very low, and the irradiation intensity was very high. It was found that hourly Ox increased from 8 A.M. and reached its peak by 2~4 P.M. As a result of factor analysis, an area characteristic of Ox could be explained by only one model for the whole area of Seoul(at least within 15 km of a radius). It was proved that a discriminant model is better than a multiple regression model in case that a high level of Ox is concerned, but in general two models were alike. Therefore, in view of photochemical Ox control strategy, it is thought that a discriminant model is more useful than a multiple regression model, in case that the excess of a certain warning criteria is important than any other cases.

침엽수로부터 발생되는 방향성 테르펜의 배출속도 비교 연구

김조천,홍지형,강창희,선우영,김기준,임준호 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.2

In order to investigate the composition ratio and the emission rate of monoterpenes emitted from coniferous trees during summer, the enclosure chamber experiments were carried out for two tree species (Pinus densiflora and Pinus rigida). The major monoterpenes from the pine trees were α-pinene, β-pinene, myrcene and β-phellan-drene. There was no difference of the composition ratio between two sites for P. densiflora, but the difference was observed for P.rigida, Clearly, the ratio of β-pinene (26.1%) for P.rigida was higher than that of β-phellandrene (12%) at the Gumsung mountain site, but the ratio of β-phellandrene (22.2%) was higher than that of β-pinene (9.9%) at the Chiri mountain site. Particularly, the composition ratio of β-phellandrene was higher than that of β-pinene for P.densiflora, and the opposite trend was found for P.rigida at the Gumsung mountain site. The characteristics of the composition ratio between two species were similar at the Chiri mountain site. As a result of the emission rate measurements, it was observed that both sites did not show any significant β value (slope between emission rate and temperature) and ERs (Standard Emission rate at 30℃) difference. However, the β value and ERs at the Chiri mountain site were slightly greater than those of Gumsung mountain site for both pine species. P.densiflora(1.703 and 1.971㎍C/gdw/hr) showed the higher monoterpene ERs than those of P.rigida (0.572 and 0.698 ㎍C/gdw/hr) at both sites.

여름철 참나무속의 이소프렌 배출속도 비교에 관한 연구

김조천,김기준,홍지형,선우 영,임수길 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.1

In order to compare the NVOC (Natural Volatile Organic Compound) emission rates from oak trees, the emission rates of isoprene were quantitatively measured in situ based on tree species and region. As a result, the emission rates from Quercus serrata T. were found to be 1000 times greater than those from Quercus acutissima C. However, the emission rates at the Chiri and Gumsung mountain sites did not show any significant differences in summer. Cuvette tests using four different oak species also supported that there was a tremendous difference in emission rates between Quercus serrata T. and Quercus acutissima C. It was found that the emission rates from the trees were highest on the order of Quercus serrata T., Quercus aliena B., Quercus acutissima C. and Quercus variabilis B.

哮喘의 原因과 治法에 대한 硏究(中醫雜誌를 中心으로)

李春載,辛祖永 한국전통의학연구소 2000 한국전통의학지 Vol.10 No.1

This is the study on causes and remedies of asthma in chinese medical journals(1994-1999). The results were as follows. 1. Asthma is almost caused by phlegm(痰), and related to lung, spleen, and kidney. 2. In view of remedy, curing both superficial and original symptoms is better than curing only superficial symptoms. 3. In treatment, they use controlling(pull down and scatter) functional activity of the lung (肺氣宣降), supporting original vital energy(扶正固本), warming the kidney function and invigorating the spleen(溫腎健痺), promoting the function of Fu(腑) and removing heat from the lung(通腑瀉肺) 4. In view of remedy, they use various methods(f.e. injection, patch etc.) besides taking herb medicine.

소나무로부터 배출되는 모노테르펜 구성비의 수령별 특성 연구

김조천,홍지형,주명칠,전진,김기준 동신대학교 환경연구소 2002 환경연구 Vol.7 No.1

소나무로부터 직접 배출되는 주요한 모노테르펜 물질로 α-pinene, camphene, myrcene, β -pinene, α-phellandrene, α-terpinene, d-limonene, p-cymene, β-phellandrene 등이 확인되었다. 7년생 소나무에서 직접 배출되는 모노테르펜 물질의 구성비를 분석한 결과 β-pinene이 67.0%로 가장 높았고, 22년생 소나무 경우에 β-phellanone이 37.4%로 가장 높았으며, 32년생 소나무는 α-pinene 구성비가 약 42.9%로 가장 높았다. 소나무는 수령에 따라서 구성비에 큰 차이를 보였으며, 소나무 수령이 높을수록 α-pinene이 구성비가 높았다. 소나무의 수령별 α-pinene과 β-pinene의 비율(α-pinene/β-pinene)을 비교한 결과, 7년생 소나무의 경우 0.16~l.15 범위로 나타났고, 22년생 소나무의 경우 0.64~2.47로 나타났으며, 32년생 소나무의 경우 0.50~18.47 범위로 나타났다. α-pinene과 β-pinene의 비는 수령이 높아질수록 좀 더 높은 값을 보였고, 동일한 수령일지라도 나무에 따라서 차이를 보였다. The major monoterpenes emitted from the Pinus densiflora were α-pinene, camphene, myrcene, β-pinene, α-phellandrene, α-terpinene, d-limonene, p-cymene and β-phellandrene. As a result of comparison of monoterpene composition by tree age for P. densiflora, it was found that β-pinene was a dominant monoterpene for 7-year-old pine(67%). β-Phellandrene(37.4%) and α-pinene(46.1%) were most abound for 22-year-old pine and 32-year-old pine respectively. The ratio of monoterpene composition varied considerably with tree age for the pine, and the percentage of α-pinene composition increased with tree age. The ratio of α-pinene and β-pinene(α-pinene/β-pinene) increased with tree age, and varied tree to tree.

주파수 선택성 다중경로 페이딩 채널에서 Near/Far 영향을 받는 Multi-Carrier CDMA Trellis Coded 16 QAM 시스템의 성능 해석

노재성,강희조,김춘길,김언곤,조성준 대전산업대학교 반도체기술연구소 2000 半導體技術硏究所報 Vol.2 No.-

본 논문에서는 주파수 선택성 다중경로 페이딩과 Near/Far 영향을 받는 Multi-Carrier CDMA 시스템의 성능을 분석하였다. 성능 분석을 위해 사용한 파라미터들은 Multi-Carrier의 수, 다중사용자의 수, RAKE 수신기의 가지수, 주파수 선택성 다중경로 페이딩의 감쇄지수, 그리고 CDMA 다중사용자의 분포와 세기이다. Multi-Carrier CDMA 시스템에서 Near/Far 영향을 분석하기 위하여 3가지의 간섭 분포 모델을 설정하였다. 첫 번째 모델은 다중사용자가 간섭과 대 반송파 비인 I/C를 -4 dB에서 4dB 사이에서 2dB씩의 차이를 가지며 20%씩 균일하게 분포하는 경우이다. 두 번째 모델은 다중사용자가 I/C 비를 -2 dB에서 2 dB 사잉에서 2 dB씩의 차이를 가지며 33.3%씩 균일하게 분포하는 경우이다. 그리고 세 번째 모델은 모든 다중사용자가 I/C가 0 dB로 신호 전력과 간섭 전력이 동일하게 분포하며 전력이 완전하게 제어된 경우이다. 그리고 본 논문에서는 주파수 선택성 다중경로 페이딩의 영향을 감소시키기 위하여 RAKE 수신기를 채용한 Multi-Carrier CDMA 시스템을 제안하였다. 이 시스템에서는 제시한 3가지의 간섭 분포 모델중에서 세 번째 모델(완전 전력제어가 된 경우)이 가장 좋은 성능을 나타내었고, 간섭파의 전력과 신호파의 전력차이가 적을수록 희망 신호에 영향을 주는 간섭 신호의 전력량이 적어서 Multi-Carrier CDMA 시스템의 성능이 향상됨을 알 수 있었다. The performance of a multi-carrier CDMA system is analyzed considering frequency selective multipath fading and Near/Far effects. The number of multicarrier, multiuser, and arms of RAKE receiver, and the decay ratio of frequency selective multipath fading are used as a parameter for the performance analysis. Moreover, the distribution and the strength of multiuser interference are also considered. To evaluate the Near/Far effects in a multi-carrier CDMA system, three distribution models are assumed. In the first model, Interference to Carrier Ratio, I/C, ranges from -4 dB to 4dB, and at each 2 dB interval, 20% of multiuser is assumed to be uniformly distributed. In the second one, I/C ranges from -2 dB to 2dB, and 33.3% of multiuser is assumed to be equally dispersed at each 2dB interval. The third model is 0 dB of I/c, that is, with perfect power control, multiuser are assumed to be evenly located. In this paper, multi-carrier CDMA system adopting RAKE receiver is proposed to mitigate the frequency selective multipath fading. From the results, the third model(i.e. perfect power control) shows the best perfomance, and the narrower range of I/C causes the less effects to the desired signal, which reads to the better performance.