回轉圓板에 의한 窒酸化에 關한 硏究

鄭渭得,奇文奉,安鍾洙 동아대학교 환경문제연구소 1989 硏究報告 Vol.12 No.1

RBC system was used in order to accomplish the COD removal and nitrification simultaneously in one step. The effect of pH on nitrification rate was examined in a suspended growth system, using microorganism scraped from the rotating discs, and an optimum pH value was between 7.5 and 8.5. Nitrification was not accompanied by a large amount of dissolved oxygen supplied in the system. This might be attributed to the increased thickness of the COD - utilizer - biofilm limited oxygen and substrate transfer for nitrification under high COD loading. It was found that the COD loading must be reduced to below 0.027㎎/㎠·hr, for nitrification to occur in the rotating disc system, and that a multi - stage system could improve the treatment of waste waster containing both high COD and inorganic nitrogen.

HBx형질전환 생쥐에서 발생한 간세포암종에서 H-ras 및 c-myc의 발현에 관한 연구

문형배,소병준,김학철,윤기중,한원철,조향정,유대열,정영진 圓光大學校 醫科學硏究所 2002 圓光醫科學 Vol.17 No.2

<연구목적> HBx형질전환 생쥐에서 발생한 간세포암종의 발암과정에 종양유전자(H-rgs, c-myc)의 발현 정도를 조사하고자 하였다. <연구방법> 정상생쥐 12마리(4-18개월) 및 HBx 형질전환 생쥐 44마리(4-18개월)를 대상으로 포르말린에 고정하고 파라핀에 포매한 간 조직을 이용하여 면역조직화학적염색을 실시하였다. 실험군은 정상 부위, 이형성 부위 및 종양 부위로 구분하였으며, 종양 부위는 소결절성병변 부위와 간세 포암종 부위로 구분하였고, 이형성병변 부위는 이형성병변만 발견되는 부위, 소결절성병변과 동반된 이형성병변 부위 및 간세포암종과 동반된 이형성병변 부위로 구분하였다. <연구결과> H-rgs의 발현은 정상 간조직에 비하여 이형성병변 부위(P<0.05) 및 종양 부위(P<0.01)에서 증가하였으며, 소결절성병변 부위과 간세포암종 부위 사이에서는 간세포암종 부위에서 증가된 경향이었으나 통계학적으로 유의한 차이가 없었으며, 각 이형성병변 부위 사이에서도 유의한 차이는 없었다. c-myc의 발현은 정상 간조직 및 이형성병변 부위에 비해 종양 부위에서 증가하였으며(P<0.001), 소결절성병변 부위와 간세포암종 부위에서는 비슷하였고, 각 이형성병변부위 사이에서도 비슷하였다. <결론> HBx형질전환 생쥐에서 발생하는 간세포암종의 발생에 H-rgs는 이형성 변화를 일으키는 시기에 관여하며, c-myc은 이형성병변에서 암으로 이행하는 시기에 관여할 것으로 생각한다. Background: This experiment was designed for the expression of H-ras and c-myc in hepatocarcinogenesis of the HBx transgenic mice. Methods: Immunohistochemical stains in the paraffin embedded tissue of the liver were used for the detection of H-ras and c-myc in the 12 normal mice and 44 HBx transgenic mice of the 4-18 month old. Results: Expression of the H-ras was significantly increased in the dysplastic area (P<0.05) and tumor area (P<0.01) than in the normal liver. But there were no differences of H-ras expression between areas of microscopically identified hepatocellular carcinoma (MI-HCC) and grossly identified hepatocellular carcinoma (GI-HCC) and dysplastic areas among the only dysplastic areas, dysplastic areas with MI-HCC and GI-HCC. Expression of the c-myc was significantly increased in the tumor area (P<0.001) than in the normal liver and dysplastic area. But there were no differences of c-myc expression between areas of MI-HCC and GI-HCC, and dysplastic areas among only dysplastic areas, dysplastic areas with MI-HCC and GI-HCC. Conclusions: Our study suggests that H-ras is related to the dysplastic change and c-myc is related to the neoplastic change in the hepatocarcinogenesis of the HBx transgenic mice.

HBsAg 양성혈청에서의 HBeAg 및 anti-HBe 양성율과 ALT와의 관계 고찰

문희주,윤기은,박정오,배형준,최범열 서울보건대학 1996 서울보건대학 부설 한국보건과학연구소 논문집 Vol.3 No.1

The authors investigated HBeAg and anti-HBe in 1,000 cases(male 941, female 59) of HBsAg positive among the 225,512 blood donors in Seoul Nambu Blood Center in 1994. HBeAg and anti-HBe was detected by the method Enzyme Immunoassy. The results obtained were as follows ; 1. HBeAg and anti-HBe positive rates were detected 498 cases(49.8%) and 445 cases(44.5%) respectively among 1,000 cases HBsAg positive blood donors. 2. In HBsAg positive carriers, HBeAg positive rates were not significantly different between anti-HBe positive rates, but in sex were significantly different between HBeAg positive rates and anti-HBe positive rates. 3. HBeAg positive 498 cases were analyzed with age and it was found percentages of positive rates were 63.6% in 1st decade, 53.7% in 2nd decade, 20.6% in 3rd decade, 19.6% in 4th decade and 8.3% in over 5th decade, but anti-HBe positive 447 cases were 32.4% in 1st decade, 40.5% in 2nd decade, 69.2% in 3rd decade, 78.3% in 4th decade and 91. 7% in above 5th decade. 4. HBeAg positive rate decreased stepwise with age, while anti-HBe positive rate increased stepwise with age. 5. ALT abnormal cases in the HBeAg positive donors were higher than normal cases, but ALT normal cases in the anit-HBe positive donors were higher than abnormal cases.

연약점토층 위에서 선행하중의 제거-재압축에 따른 점토지반의 거동

정성교,이남기,조기영,김문규 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.2

Little has been known about the characteristics of short-term and long-term resettlements on soft clay, such as elastic behaviour and secondary compression due to partial removal of preloading. In this study, different types of oedometer tests on a natural soft clay were peformed for examining such characteristics. As the results of the experiments, the characteristics of short-term and long-term resettlements such as rebound ratio, resettlement point and rate of secondary compression depends on the overconsolidation ratio(OCR) and preloading time. It is showed that resettlement point increased with increasing preloading, but such is not for rebound ratio and rate of secondary compression. This reason would be due to rearrangement of clay particles. And rebound ratio and resettlement point increased with increasing the OCR, but such is not for rate of secondary compression. The correlations between them is showed all the linear relations in a semi-logarithem or log-log plots, and then can be used for settlement prediction in field, as well its results can be compared with those of conventional method. from the comparative results of settlement prediction, it is found as follows : The amount of rebound due to partial removal of preloading and resettlement due to reloading are similar for both methods. But the amount of secondary compression due to partial removal of preloading by this correlation is rather overestimated than that of conventional method, because it would be underestimated the duration of primary consolidation. And for different loading histories, the compression is affected by strain rate(ε_(v)), that is, the compression increases with decreasing strain rate.

飼料作物의 生育에 關한 調査 Ⅱ : 晉州地方을 中心으로 for Chinju Area

文勝式,金基元,鄭鉉承 진주산업대학교 1971 論文集 Vol.8 No.-

Sowing 6 Kinds of leguminous grasses 8 Kinds of forage grasses 6a ward of mixture grasses 20 kinds in total, I had bbserved them for 8 month (Marchs. 1970~ october 30 1970) and acquired the results as follow; 1. The growth of forage crops and mixture was well in good soil with plenty rainfall in moderate atmospherical condition. 2. The summer drought is sure in ladino clover alfalfa, birds foot trefoil, Perennial ryegrass, Timothy and Brome grass, The mixture ward is comparatively little. 3. The respective fresh yield of orchard grass, Red clover O+OL+B+R were 5,500㎏, 5,100㎏, 4,325㎏.

FMC 構造設計를 위한 컴퓨터 시뮬레이션

鄭準基,辛文基 弘益大學校 1990 弘大論叢 Vol.22 No.2

The System Layout of Flexible Manufacturing Cell by computer simulation This paper describes the system layout of flexible manufacturing cell. It was formed part families and machine groups to increase flexibility and productivity. Part families and machine groups were made up by digitizing analysis. In this paper information of machine tool, quantity of part and machining time are used for the purpose of manufacturing cell matrix. Somewhat manufacturing cell is composed by 0.1 method instead of machining time among input information. As a result, it is made manufacturing cell of idential type. Therefor it possesses the advantage of noncounting machining time one by one. Another benefit is more easily grouping than any other GT(Group chnology) methods. Besides, the existing algorithm is developed a new algorithm to avaiable personal computer.

관절염 환자의 실태와 관련요인에 대한 분석적 연구

정승기,남철현,신두만,양숙희,김기열,이미경,문기내 대한보건협회 2002 대한보건연구 Vol.28 No.3

This study was conducted to examine the condition of patients with arthritis and its related factors. Data were collected from 100 people who suffered from arthritis in Seoul. Busan, Daegu, Daejun, Junjoo, and pohang from April 2, 2000 to July 31, 2000. The results of this study are summarized as follows : 1. 6L0% of the subjects were female. The incidence rate of arthritis was higher in the higher age group, lower educated group, and thinner group. In case of male, the incidence rate was higher in the groups of single, residents in big cities, and technicians. In case of female, it was higher in the groups of the married, residents in towns or villages, and housewives. 2. According to the parts of arthritis, knee joint covered 67.4% and backspine joint covered 9.0%. The incidence rate of arthritis was higher in the groups of forties, housewives, single, irreligious people, residents in towns and villages, primary school graduates, thin people, and walk exercisers. 3. The arthritis patients felt pain most when they stood up (31.5%). According to the time when they felt pain most, the time when they were active during daytime was 31.5% and nighttime was 29.8%. When they got up in the morning was 22.4%, while 10.9% felt pain all cay long. 4. they had arthralgia knees and cramp in crook of the knees (21.8%). Their knees ticked when they moved (21.1%). The had to rest hands on anyplace when they stood up (18.7%) and they could not completely unfold their knees. 5. The medical institutions which diagnosed them showed significant difference in the variables of sex, age, marital status, religion, place in residence, education level, economic status, obesity level, exercise, parts of arthritis, and posture of feeling pain. from above results, it can be concluded that it is necessary to develop appropriate medical treatment on the basis of the respondents' socio-democraphic characteristics, pain parts, period of having a pain, satisfaction level with treatment and its related factors. Therefore, related professionals and organizations must develop education program for prevention of arthritis in order to educate them.

Wolff-Parkinson-White증후군의 임상상 및 전기생리학적 소견

안신기,이문형,장양수,오동진,최인석,하종원,임세중,김병옥,정남식,심원흠,조승연,김성순 대한순환기학회 1997 Korean Circulation Journal Vol.27 No.9

2005년 약국에서 판매된 코감기약

하기철,정문현,이진수,조래정,이혜경,김은실 대한감염학회 2007 감염과 화학요법 Vol.39 No.1

Background:Upper respiratory infections (URIs) are the most common infections in developed countries and are the major reasons for the consumption of medicines including antibiotics. In Korea, antibiotics and glucocorticoids were dispensed by pharmacies without prescriptions before July 2000, when the dispensation of antibiotics without doctor's prescriptions was prohibited. The objective of this study is to investigate the rate of antibiotic dispensation by pharmacies for the treatment of common cold and to identify the dispensing pattern for URI management in 2005, i.e., 5 years after the establishment of the prohibition policy. Materials and Methods:In August 2005, medical students visited 90 drugstores in three cities (Seoul, Chonan, and Chunchun) and received medications for the treatment of illnesses that simulate the common cold, i.e., rhinorrhea and nasal stuffiness that had lasted for one day and were not accompanied by fever. The components of the dispensed medicines were identified by pharmacists at a university hospital. Results:All the components of the dispensed medicines were identifiable in 85 cases (94.4%), and the mean number of medicines was 1.36 (S.D.±0.724); no difference was observed among the three cities. The antibiotics ampicillin and chloramphenicol were identified in two pharmacies in Seoul and Chunchun, respectively. Glucocorticoids were not dispensed in any case, and a nonsteroidal antiinflammatory drug was dispensed in only one case. Compound medicines are increasingly used as cold remedies; the components of the most frequently dispensed medicine were acetaminophen, chlorpheniramine, and pseudoephedrine. Herbal medicines were also frequently included in cold remedies (38.9%); licorice (30%) and ginger (26%) were the two most frequently used medicinal herbs. Conclusion:There was a marked decrease in the dispensation of antimicrobials, glucocorticoids, and nonsteroidal antiinflammatory drugs without doctor's prescriptions. Chloramphenicol continued to be dispensed as a URI medication. Increased use of compound and herbal medicines as cold remedies suggests a need for the evaluation of the additional benefits of herbal medicines, their adverse effects, and the drug interactions between herbal and conventional medicines. 배경 : 상기도 감염은 선진국에서 발생하는 가장 흔한 감염증이어서 이를 치료하기 위해 투여되는 약제는 전체약제 소모의 중요한 원인이며, 약제 부작용, 경제적 손실, 항균제 내성 유발에 큰 영향을 미칠 수 있다. 한국에서는 의약분업이 시행된 2000년 이전에는 항균제나 부신피질호르몬의 처방이 약국에서 자유롭게 되었지만, 의약분업이 시행되면서 감소하였을 것으로 추정되나 이에 대한 연구는 없었다. 이에 약국에서 판매되는 감기약에 항균제가 얼마나 포함되는지를 조사하고 판매되는 감기약의 실정을 알기 위해 이번 조사를 하였다. 재료 및 방법 : 2005년 8월 11일과 12일에 걸쳐 서울, 춘천, 천안의 개원 약국을 대상으로 의과대학 학생이 직접 방문하여 조사하였다. 비염(발열이 동반되지 않은 1일간의 콧물과 코막힘)을 주소로 하여 감기약을 받았으며, 이를 대학병원의 약품정보실 근무 전문 약사가 동정하였다. 결과 : 판매한 모든 약을 확인할 수 있는 경우가 85건(94.4%)이었다. 약의 종류는 1.36(S.D.±0.724)종이였으며, 지역별 차이는 없었다. 2개(2.2%) 약국에서 판매한 감기약에 항균제가 포함되었고, 서울과 천안에서 각각 1개 약국이었다. 서울 약국에서는 ampicillin이, 춘천에서는 chloramphenicol이 포함되었다. 부신피질호르몬이 포함된 경우는 없었으며, 비스테로이성 항염증제로는 이부프로펜 1건(1.1%)만이 있었다. 복합 감기약의 사용이 늘었으며, 3가지 성분을 포함한 경우가 제일 흔해 acetaminophen, chlorpheniramine, pseudoephedrine의 조합이었다. 한약제가 감기약에 포함된 경우는 35건(38.9%)이었고, 흔한 성분은 감초와 생강 또는 건강(ginger)이었다. 결론 : 의약분업 이후 약국에서 처방된 감기약에는 항균제, 부신피질호르몬, 비스테로이드 항염제의 판매는 급격히 감소하였다. Chloramphenicol이 아직도 감기 치료제로 판매되고 있으며, 복합 감기약의 사용이 늘었고, 생약이 흔히 포함되어 이의 효과 판정, 부작용, 약물 상호작용에 대한 조사가 필요하다.

연령의 증가에 따른 남성의 골밀도와 골교체율의 생화학적 표지자의 변화

민용기,안규정,정재훈,고은미,이명식,이문규,김광원,이종헌 대한골대사학회 1995 대한골대사학회지 Vol.2 No.2