交感神經節遮斷劑에 의한 Norepinephrine, Angiotensin에 대한 家兎血壓反應의 變動

安龜燮 全南大醫大 1970 전남의대학술지 Vol.7 No.4

심폐소생술의 순환회복 예측인자로서 호기말 이산화탄소 분압의 유용성 및 의의 : 각 심정지 원인에 따른 분석

어은경,안기옥,김정연,전영진,정구영 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Background: In recent years, there has been increasing interest in the use of capnometry, the noninvasive, continuous measurement of end-tidal carbon dioxide(ETCO2) in expired air during CPR. The purpose of this study is to determine the significance of ETCO2 monitoring according to immediate cause of arrest during CPR as a prognostic indicator of successful resuscitation and survival. Methods: A prospective, clinical study was performed from May 1997 to December 2000 at the Department of Emergency Medicine, Ewha Womans University Mokdong Hospital. The study included 220 patients(231cases). All patients were immediately connected to a mainstream capnometer sensor between the tube and the bag after endotracheal intubation using an infrared capnometer. Results: The 107 patients(46.3%) with return of spontaneous circulation(ROSC) had higher maximal ETCO2 during CPR than the 113 patients without ROSC(31.0±19.4 vs 11.7±9.4 mmHg, P=0.000). The ETCO2 was not significantly different in relation to age, initial rhythm, and survival time after ROSC, but there was a significant difference in the immediate cause of arrest in the ROSC group(respiratory arrest: 40.2±23.5 mmHg, P=0.000). In case of cardiac arrest due to trauma, maximal ETCO2 was not significant in the ROSC group compared with the non-ROSC group(18.2±16.6 vs 10.8±7.5 mmHg, P=0.208). When maximal ETCO2 was less than 10 mmHg, we observed a sensitivity of 94.4% and a specificity of 39.5% in predicting ROSC. There were 6 patients with ROSC even though the maximal ETCO2 was less than 10 mmHg. Conclusion: Continuous ETCO2 monitoring during CPR may be noninvasive and valuable predictor of successful resuscitation and survival from cardiac arrest. However, ETCO2 should not be used as a single indicator for either cardiac arrest due to trauma or withdrawal of CPR.

5년간 집단 검진에 의한 연취급 사업장 근로자들의 건강수준 평가

차영수,이성수,안규동,한구웅,이병국 순천향 대학교 산업의학연구소 출판부 1995 순천향산업의학 Vol.1 No.1

To evaluate the health status of workers in lead using industries under supervision by Soonchunhyang University Institute of Industrial Medicine as part of program of group occupational health service and find out longitudinal changes of health status of lead workers through the service for 5 years from 1989 to 1993, authors analyzed 5 years's periodic health examination data which comprised 29 lead using industries with 40,035 total cumulative number of workers. Selected variables for this study were screening results of general health examination and final results of confirmative health examination for the general health examination which dealt with office workers and blue collar workers with no exposure of hazardous condition. For the special health examination, zinc protoporphyrin in whole blood (ZPP) and screening results of special health examination were selected for study variables. For the confirmative special health examination with screening positive workers, blood lead(PbB), delta-aminolevulinic acid in urine, ZPP, and final result were selected for study variables. Information on age, sex, and type of industries were also collected. The results obtained were as follows; 1. The five years screening positive rate for general health examination was 13.7% and 5 years rate for C category which did not need further confirmative recheck was 5.2%. 2. While the proportion of liver disease in C category in primary general health examination was 49.2% those of anemic disease and hypertensive disease were 23.3% and 27.5% respectively. 3. Five years screening positive rate and negative rate for storage battery industries, secondary smelting related industries, telecommunication related industries and other industries were 83.4% and 12.4 %, 76.5% and 17.5%, 75.5% and16.4%, and 79.5 and 14.4% respectively. 4. Screening positive rate for 5 years were increased as age increased from 9.0%(age less than 30 years ) to 21.1% (age more than 40 years). 5. Only 22.1% of screening positive workers for 5 years general health examination were diagnosed as confirmed general diseases and 33.1% were revealed as normal. The rate of confirmed general diseases were differed by the type of industries and they were increased by age increased. 6. The rate confirmed general disease and non-disease in screening positive of liver, cardiovascular, tuberculosis and chest, anemic and renal disease category were 25.5% & 14,5%, 22.8% &37.2% 21.5% &23.0% 62.0% & 7.0%, and 16.5% & 53.9% respectively. 7. The 5 years prevalence rate of confirmed general disease(D_(2)/total workers) and prevalence rate of abnormal finding(C+D_(2)) were 3.21% and 14.9% as a whole. By the screened disease category, those rate were 1.23% &6.89% for liver disease, 1.17% & 5.43% for cardiovascular disease, 0.96% &1.64% for tuberculosis and chest disease, 0.76% & 1.02% for anemic disease and 0.03% & 0.06% for renal disease respectively. 8. The five years screening positive rate of all lead workers with the criteria of the measurement of ZPP(>=100㎍/㎗) was 10.2% (female lead workers :25.5% male lead workers :8.1%). The positive rate has tendency to decrease year by year from 1989 to 1993. The phenomenon of decrease of rate was significant in storage battery industries, but not apparent in secondary smelting related industries. 9. The proportion of lead poisoning (D_(1)) among screening positive of lead workers was 14.9% for 5 year special health examination and rest of screening positive were diagnosed as high lead absorption. White the proportion of D_(1) was 8.8% in storage battery industries, that was 23.9% in secondary smelting related industries. 10. The distribution of screening positive lead workers by the group of ZPP for 5 years as a whole was 48.3%, 20.9%, 20.5% and 10.3% in the group of ZPP 100-149㎍/㎗, 150-199㎍/㎗, 200-299㎍/㎗ and above 300㎍/㎗, respectively. 11. The proportion of screening positive lead workers whose blood lead were above 60㎍/㎗ and whose urine ALA were above 10㎎/ℓ were 53.3% and 61.4%, respectively. 12. The 5 year overall prevalence rate of lead poisoning (D_(1)/all lead workers) was 0.142%(female lead workers:0.116%, male lead workers:0.145). For the rate of high lead absorption((C+D_(1))/all lead workers) was 0.945%(female lead workers:2.36, male lead workers :0.756). The above prevalence was decreased in later year of study period than early year of study period.

임신여성을 제외한 성인에서의 B군 연쇄구균 감염에 관한 임상적 고찰

고경식,권선희,안우석,이원욱,김구엽,서환조 대한감염학회 1995 감염 Vol.27 No.4

목적:B군 연쇄구균은 최근 보고에 의하면 만성 기저질환(당뇨병, 악성종양등)이 있는 성인에서 감염빈도 및 사망률, 이환율이 증가하고 있는 추세이며 그 중요성이 대두되고 있다. 이에 저자들은 B군 연쇄구균 감염의 임상양상, 기저질환(위험인자)을 알아보고, B군 연쇄구균 항균제 감수성등을 규명하고자 하였다. 방법:1986년 1월부터 1993년 12월까지 경희대학교 부속병원에서 B군 연쇄구균이 배양된 274예를 대상으로 의무기록지를 검토하였다. 결과: 1) 전체 연구대상은 274예로 98예(35.8%)가 남자였고, 176예(64.2%)가 여자였다. 이들의 연령분포를 보면 신생아군에서 감염이 많이 발생하였다 이후 감소추세를 보이다가 20대 이상에서 다시 증가 하는 추세를 보였다. 2) 감염 양상은 274명중 명확한 감염이 156명(56.9%), 추정감염이 55명(20.1%), 비감염이 63명(23.0%)이었다. 임신을 제외한 18세 이상의 성인은 231명으로 남자가 83명, 여자가 148명이었고 남여 비율은 1:1.78이었다. 이중 133예(57.6%)에서 명확한 감염이었고, 46명(19.9%)에서 추정 감염, 52명(22.5%)에서 비감염이었다. 명확한 감염환자 133명중 31명(23.3%)이 병원내 감염이였다. 3) 18세 이상의 성인 231명에서 Group B Streptococcus가 분리 동정된 감염 부위는 자궁 경부 77예(33.3%), 요 73예(31.6%), 객담및 상기도 39예(16.9%), 농 24예(10.4%)등이었다. 4) 명확한 감염을 가지고 있었던 성인 133명의 임상양상은 요로 감염 37명(28%), 자궁 경부염 37명(28%), 피부, 연조직 감염 23명(17%), 폐렴 10명(8%), 패혈증 8명(6%)등이었다. 5) 명확한 감염을 가지고 있었던 성인 133명중 92명(69%)에서 한가지 이상의 만성 기저질환이 있었으며, 이중 당뇨병 32%, 뇌 혈관 질환 21%, 고혈압 19%, 신부전 12%, 악성종양 5%등을 차지하였다. 6) 항균제 감수성 검사(251예)에서 penicillin 98.4%, cephalothin 99.6%, cefamandol 98.8%, erythromycin 96.0%, clindamycin 89.4%, oxacillin 88.8%, lincomycin 87.8%, methicillin 86.8%, minocycline 49.4%, trimethoprim-sulfamethoxazole 15.5%의 감수성을 보였다. 7) 명확한 성인 감염 133명중 6명(4.5%)이 사망하였다. 결론:B군 연쇄구균은 만성 기저질환이 있는 성인에서 감염 빈도가 높고, 치명적인 결과를 초래할수 있으므로 감염 예방 및 조기 발견, 적절한 항균제 감수성 검사에 따라 조기 치료로 사망률을 줄여야 할것으로 생각된다. Background: Several reports have suggested that the incidence of diseases caused by Group B streptococcus is increasing in nonpregnant adults, particularly those with serious underlying diseases. The objectives of this study were to define the clinical manifestations, underlying conditions(risk factors) of definite group B streptococcal diseases in nonpregnant adults and to obtain antimicrobial sensitivity of these infections. Methods: We analyzed the records of 274 cases of the Group B streptococcus isolated in Kyung-Hee University hospital between 1986 and 1993. Results: 1) Total Group B streptococcal isolates were 274 cases : Of these cases, 7 percent were 1 month of age or younger, 3 percent were older than 1 month but younger than 18 years of age, and 91 percent were 18 or older. 2) Men and nonpregnant women accounted for 87 percent (n=231) : 133 cases (57.6%) with definite infection, 46 cases(19.9%) with possible infection, and 52 cases(22.5%) with no infection. 31 cases of 133 (23.3%) nonpregnant adult with definite infection apeared to have acquired the disease nosocomially. 3) In the 133 nonpregnant adult patients, the most common clinical diagnosis were urinary tract infection(28%), and cervicitis(28%). 4) In the 133 nonpregnant adult patients, the underlying diseases or conditions were diabetes mellitus(32%), cerebrovascular accident(21%), hypertension(19%), renal failure(12%), and malignant neoplasm(5%), Sixty-nine percent of the cases had one or more underlying diseases. 5) In the antimicrobial sensitivity tests, 98.4% of isolates were sensitive to penicillin, 99.6% to cephalothin, 98,8% to cefamandol, 96.0% to erythromycin, 89.4% to clindamycin, and 49.4% to minocycline. 6) The case mortality rate was 4.5%(6 of 133). Conclusion:We found group B streptococcal infection to be a significant and apparently increasing cause of definite diseases in nonprognant adults, particularly in those with serious underlying diseases. Recognizing these infections early in the groups with serious underlying diseases will be helpful in lowering mortality.

3-Cyano 및 3-Carbomethoxy Chromone과 Allenylstannane과의 반응

鄭大一,宋有淨,崔舜圭,李龍均,安賢淑,윤구식 東亞大學校附設基礎科學硏究所 1998 基礎科學硏究論文集 Vol.15 No.2

t-Butyldimethylsilyl triflate 존재에서 3-Cyano 및 3-Carbomethoxy Chromone(1a,b)과 Allenylstannane(2) 과의 반응에서 Chromone의 C-2위치에 propargyl기가 도입된 유도체(3a,b)를 합성하였다. 합성한 유도체의 상대적 구조는 ¹H-NMR을 통해 분석하였으며, T.S구조의 모델을 통하여 가능한 메카니즘을 제시하였다. Reaction of 3-Cyano and 3-Carbomethoxy Chromone(1a,b) with Allenylstannane(2) in the presence of tert-butyldimethylsilyl triflate afforded the corresponding the propargylation product(3a,b) in the moderate yield. The relative stereochemistry of 3a,b are obtained on the basis of ¹H-NMR analysis. And the possible reaction mechanism are suggested by the molecular models in the transition state.

On S-admissible Classes

Ahn, Jae Koo,Kim, Hong Oh 경북대학교 교육대학원 1974 논문집 Vol.5 No.-

位相空間 X에 對하여 S(X)는 X 上의 모든 連續寫像의 半群을 表示한다. 位相空間의 領域이 S-可容이라는 것은 그 領域上에서는 모든 同型 φ:S(X)??S(Y)이 하나의 位相寫像 h:X??Y에 依해서 φ(f)=hfh^-1(f∈S(X))로 表示될 것이다. K.D. Magill, Jr.에 依해서 두개의 S-可容인 S-位相空間의 領域과 S^*-位相空間의 領域이 도입되었다. 本論文에서는 Hausdorff 空間의 領域內에서 S-位相空間과 S^*-位相空間을 包含하는 S-可容인 S^#-位相空間의 領域을 새로이 導入한다.

ON GENERAL HARMONIC AND KILLING VECTORS IN METRIC MANIFOLDS WITH GENERAL SYMMETRIC AFFINE CONNECTION

Ahn, Jae Koo Department of Mathematics 1959 Kyungpook mathematical journal Vol.2 No.1

ON THE PRODUCT GROUP MANIFOLD

Ahn, Jae Koo Department of Mathematics 1961 Kyungpook mathematical journal Vol.4 No.2

Study on the Defects Detection in Composites by Using Optical Position and Infrared Thermography

Koo-Ahn Kwon,Hee-Sang Park,Man-Yong Choi,Jeong-Hak Park,Won Jae Choi 한국비파괴검사학회 2016 한국비파괴검사학회지 Vol.36 No.2

Non-destructive testing methods for composite materials (e.g., carbon fiber-reinforced and glass fiberreinforced plastic) have been widely used to detect damage in the overall industry. This study detects defects using optical infrared thermography. The transient heat transport in a solid body is characterized by two dynamic quantities, namely, thermal diffusivity and thermal effusivity. The first quantity describes the speed with thermal energy diffuses through a material, whereas the second one represents a type of thermal inertia. The defect detection rate is increased by utilizing a lock-in method and performing a comparison of the defect detection rates. The comparison is conducted by dividing the irradiation method into reflection and transmission methods and the irradiation time into 50 mHz and 100 mHz. The experimental results show that detecting defects at 50 mHz is easy using the transmission method. This result implies that low-frequency thermal waves penetrate a material deeper than the high-frequency waves.

Long-term Investigation of Soil Chemical Properties in Paddy Fields Located in Different Topographic Areas of Jeonbuk Province

Ahn, Byung-Koo,Ko, Do-Young,Lee, Chang-Kyu,Kim, Jin-Ho,Song, Young-Ju,Lee, Jin-Ho 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.3

The aim of this study was to examine the selected soil chemical properties of paddy fields in different topographic areas to efficiently manage nutrient valances of the paddy fields in Jeonbuk Province. Three-hundred soil sampling sites in paddy fields were selected from the different topographic areas in Jeonbuk Province. The soil samples were collected every four years from 1999 to 2015. Soil pH and exchangeable K and Mg concentrations declined during the experimental periods. However, almost all the chemical properties were within the proper levels for paddy soil, except exchangeable Mg concentration. Distributed areas of the paddy fields with soil pH below 5.5 continuously increased, but the paddy fields with lower concentrations of soil organic matter and available $P_2O_5$ than the proper levels declined after 2007. In addition, the paddy fields with available $SiO_2$ below the proper concentration decreased from 83.3% of the total paddy fields studied in 1999 to 61.0% of the total fields investigated in 2015. The paddy fields with lower exchangeable K and Mg than the proper levels increased after 2003 whereas the fields with lower exchangeable Ca concentration decreased. Dominant landform of coastal and plain areas was fluvio-marine plains that was distributed in 53.7% and 40.9%, respectively. Local valley and fans was a dominant landform of mountainous and middle-mountainous areas, which was 51.8% and 67.6%, respectively. Dominant soil textures distributed in coastal and plain areas were silty loam and loam. Those in mountainous and middle-mountainous areas were sandy loam and loam, respectively. Soil pH was relatively higher in coastal area and the comparatively higher content of soil organic matter was found in costal area than other areas. The concentrations of available $P_2O_5$, exchangeable Ca, and exchangeable Mg were generally higher in mountainous, coastal, plain areas, respectively, but available $SiO_2$ and exchangeable K concentrations were not significantly different among the different topographic areas.