사람胎盤에 있어서 Adenosine Diphosphate Ribose의 酵素的 分解過程

崔洛庠 全南大醫大 1973 전남의대학술지 Vol.10 No.3

Ascorbic Acid와 2-Methoxyestradiol에 의한 내분비선 장애물질의 제거효율

성대동,이성식,최금찬,성낙창 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1

The removal efficiency of an environmental endocrine disrupter, 1,l-bis (4-chlorophenyl)-2,2,2-trichloroethane(CPT) has been studied using L-ascorbic acid(ACA) and 2-methoxyestradiol(MSD). l,l-Bis(4-chlorophenyI)-2,2,2-trichlorcethyl anion(CPT^( θ)) is formed by treatment of OH- ion to l,l-bis(4-chlorophenyl)-2,2,2-trichloroethane(CPT), l,l-Bis(4-chlorophenyl)-2,2,2-trichiorcethyl radical(CPT·) yields during the reaction of l,l-his(4-chlorophenyl)-2.2,2-trichloroethyl anion with iodine occurs. A high m v a l efficiency for l,l-bis(4-chlorophenyl-2,2,2-trichlorcethyl radical(CPT·) reveals in the case of L-ascorbic acid(ACA) used more than that of 2-methozyestradiol(MSD). This is in accord with the rate of yielding L-ascorbic acid radical(ACA·) is faster than the one of 2-methoxyestradiol radical(MSD·). The removal efficiency of 1,1-bis(4-chlorophen~l)-2,2,2-trichloroethyl radical(CPT·) is increased with increasing of solvent acidity and solvent hydrogen bonding degree.

癒着性 前置胎盤의 一例

崔洛庠 全南大醫大 1973 전남의대학술지 Vol.10 No.3

先天性 總膽管擴張症의 治驗例

崔洛庠 全南大醫大 1973 전남의대학술지 Vol.10 No.4

작업관련 상지의 근골격계 질환 선별 및 감시를 위한 미국 NIOSH-style 설문지와 Nordic-style 설문지의 타당도 비교

최원준,성낙정,강영중,한상환 大韓産業醫學會 2008 대한직업환경의학회지 Vol.20 No.3

목적: 작업관련 근골격계 질환의 선별검사에 사용되는 두 종류의 증상설문지(NIOSH 스타일 설문지,노르딕 스타일 설문지)의 결과를 신체검사 결과와 비교하여 타당도를 평가하고,활용방안에 대하여 검토하고자 수행되었다. 방법: 인천에 위치한 3개의 제조업 사업장 근로자 208명을 대상으로 NIOSH 스타일 설문지와 노르딕 스타일 설문지를 작성하도록 하고,신체검사를 시행하였다. 신체 검사 소견과 과거병력을 바탕으로 한 환례정의를 최적기준으로 하여 두 설문지의 민감도,특이도,양성예측도,음성예측도,일치도를 구하여 타당도를 조사하였다. 결과: NIOSH 스타일 설문지는 민감도 59.5%, 특이도 68.0%, 양성예측도 68.0%, 음성예측도는 59.5%로 조사되었다. 카파계수(Kappa coefficient)로 나타낸 일치도는 0.27(95% confidence interval 〔CI〕=0.14∼0.40)이었다. 노르딕 스타일 설문지는 민감도 73.9%, 특이도 68.0%,양성예측도 72.6%,음성예측도 69.5%로 조사되었다. 카파계수로 나타낸 일치도는 0.42(95% CI=O.30∼0.54)이었다. NIOSH 스타일 설문지와 노르딕 스타일 설문지의 일치도는 카파계수 0.43(95% CI= 0.31∼O.55)로 나타났다. 증상강도의 합계점수가 2점 이상인 경우를 기준으로 했을 때,노르딕 스타일 설문지의 민감도는 72.1%,특이도는 70.1%이었다. 결론: 두 설문지 모두 적절한 타당도를 가지고 있는 것으로 평가되었다. NIOSH 스타일 설문지는 증상의 빈도,지속기간,강도를 조사할 수 있고 이에 따라 다양한 양성기준을 설정할 수 있다. 노르딕 스타일 설문지는 민감도가 높은 편이고,증상의 강도를 설문항목에 포함시킬 경우 양성기준을 다양화하기 쉽다는 점과 문항이 간단하고 작성하기 쉽다는 점을 장점으로 들 수 있다. 조사 목적과 작업장의 특성에 따라 두 설문지를 적절하게 활용할 수 있을 것으로 기대된다. Objectives: The study aimed to compare the validity of two questionnaires (NIOSH- and Nordic-style) which are used for the screening and surveillance of neck and upper extremity work-related musculoskeletal disorders. To evaluate the validity, clinical examination was used as the reference. Methods: Two types of questionnaire were filled out by 208 workers from three different plants in Incheon, Korea. Workers underwent clinical examination by three occupational physicians. The presence of a symptom or sign in at least one body region was regarded as positive in both results of questionnaire and case definition using clinical examination. Validity was evaluated by sensitivity, specificity, positive predictive value, negative predictive value and agreement (Kappa coefficient). For the Nordic-style questionnaire, the sum of the symptom scores was used to yield the ROC curve. Results: The results of the NIOSH-style questionnaire were sensitivity 59.5%, specificity 68.0%, positive predictive value 68.0%, negative predictive value 59.5%, and Kappa coefficient 0.27(95% confidence interval [CI]=0.14∼0.40). The results of the Nordic-style questionnaire were sensitivity 73.9%, specificity 68.0%, positive predictive value 72.6%, negative predictive value 69.5%, and Kappa coefficient 0.42 (95% CI=0.30∼0.54). For the Nordic-style questionnaire, sensitivity was 72.1 % and specificity was 70.1 % based on the sum of the symptom scores≥2. Conclusions: Both questionnaires demonstrated appropriate validity for the screening and surveillance of work-related musculoskeletal disorders. The selection of questionnaire may depend on the purpose of investigation and characteristics of the work place.

정수처리공정의 침전지에서 부착조류의 특성과 이취발생에 관한 기초연구

성낙창,최용락,김은호 東亞大學校附設 農業生命科學硏究所 1999 農業生命資援硏究 Vol.8 No.1

The purposes of this study were to investigate species of attached algae, and determine these characteristics and relations of odor origin for estimating its source in tap water. Oscillatoria sp. and Mougeotia sp. were colonized at the upper and lower of sedimentation basin in water treatment plant, respectively. In the results that they were analysed to collect colonies of Oscillatoria sp. and Mougeotia sp, they did not detected inodorous Mougeotia sp. but Oscillatoria sp. of some decayed odor did geosmin 3.7ppt and Dimethyl-disulfide with trace. 20species compounds were found in each of sample that were incubated in room temperature for 5days, 4species of these were THMs originated tap water and concentration was 35㎍/ℓ, and 16species compounds were by algac. Especially, sulfur compounds of 10species such as Dimethyl-sulfide were initially not detected but did very much. Also, Indole and Naphthalene were small detected. Considering characteristics of decayed decomposed sampling, generated byproduct for decayed algae of 2species turned out to be nearly identical. If estimating course of odor generation in tap water, chlorine tolerative algae formed big colony to be attached in sedimentation basin and decay was advanced with varying anaerobic condition inside colony's algae. Therfore, a lump of algae detached in suspended state flowed in filter bed, and owing to decayed colony's algae, generated inodororus material could inflowed tap water.

초등학교 학생의 진로 인식에 관한 연구 : 강원도 지역을 중심으로 Focused on Kang-won Province

성낙철,최준섭 韓國實科敎育硏究學會 1999 實科敎育硏究 Vol.5 No.2

The purpose of this study is aimed to provide necessary data and information to career education by analyzing the future career cognition level of elementary school students in Kang-won province district. The students to the number of 461 of the 5th and 6th grade students of elementary schools in Kang-won province were served as subjects for this study. They were selected and classified according to their living area, gender, learning achievement, and economic status. The main results of this study were as follows: (1) The students had their own talent(63.2%), and jobs were indispensable elements to sustain our society. The children to tell the 30 kinds of jobs or so are over 50% (2) The criteria to choose their future jobs was ability and aptitude(91.8%), and the purpose of their job is to develop their own talent, hobby and to serve their society. (3) The order of motives on career selection were decided by 峯 TV 峰 parents 捧 reading 棒 teacher, and the teaching method for career instruction must be reconsidered. (4) The 63.7% of students were in consensus of opinions to develop the future career problems between their parents and students. If their opinions about their future career problems were in discord with their parents, the 22.3% of students will consult with their teacher to resolve the conflicts.

양산시 하수관거의 불명수 산정을 위한 유량 및 수질특성

최호은,김한석,정연화,김대용,성낙창 東亞大學校 建設技術硏究所 2008 硏究論文集 Vol.31 No.2

The objective of this study were to investigated the water quantity and quality characteristics of sewer infiltration/inflow(I/I) computation in Yangsan City. infiltration/inflow(I/I) were evaluated the water-use evaluation, average daily minimum flow-water quality evaluation and minimum daily flow evaluation. Flow meter for infiltration/inflow(I/I) evaluation was used the FLO-TOTE II. Contaminant came into very low concentration at all sampling points as BOD5 standard. Also, I/I evaluation during dry weather on maximum daily infiltration flow-water quality evaluation, maximum-minimum daily flow evaluation, average daily-minimum flow-water quality evaluation is desirable than water-use evaluation. Because that infiltration/inflow(I/I) amount is much different than other evaluation methods.

녹차 및 매실 추출물이 N-Nitrosodimethylamine의 생성에 미치는 영향

최선영,정미자,신정혜,김행자,성낙주 한국식품영양학회 2002 韓國食品營養學會誌 Vol.15 No.1

녹차 및 매실추출물이 아질산염 소거, 전자 공여능 및 NDMA 생성 억제에 미치는 영향을 분석하고, 질산염과 아민이 풍부한 식단(CW)에 인공타액과 위액을 이용한 "simulated digestion" 에서 확인하였다. 녹차와 매실 추출물의 아질산염 소거작용을 pH 1.0, 4.2 및 6.0에서 실험 결과, pH가 낮을수록, 시료 첨가량이 많을수록 효과적이었으며 pH 1.2에서 녹차 추출물 0.5ml 첨가시킬 경우 99.6%의 높은 소거작용을 나타내었고, 매실 추출물 3ml 첨가시 77.2%의 소거작용을 나타내었다. 녹차 및 매실 추출물의 전자공여 작용은 각각 70.6%, 75.1%로 높게 나타났다. 녹차와 매실 추출물의 NDMA 생성억제 효과는 pH 1.2 에서 가장 뛰어났고, 시료량이 증가할수록 억제효과가 높아 3ml 첨가시에 82.1%와 73.2%의 억제효과를 나타내었다. 실험식이에 녹차 및 매실 추출물의 첨가량을 달리하여 인공소화시킬 때 NDMA 생성억제 효과는 시료 첨가량에 비례하여 각각 20ml 첨가시 녹차 추출물은 57.9%, 매실 추출물은 48.4%의 NDMA 생성억제 효과를 나타내었다. The effects of nitrite scavenging, electron donating and N-nitrosodimethylamine (NDMA) formation in vitro and green tea (Camellia sinensis) and Maesil (prunus mume) were studied. The green tea and Maesil extracts were tested for their nitrite-scavenging effect under the different pH conditions such as pH 1.2, 4.2 and 6.0. The effects of nitrite-scavenging in all concentrations were diminished in the alkali condition, whiled its effects in the acidic condition of pH 1.2 were reached of more than 99.0% by adding above 0.5ml of green tea extract. And also, nitrite-scavenging effect by adding 3ml of Maesil extract was about 77.0%. The electron donating ability (EDA) of green tea and Maesil extracts was 70.6%, 75.1%, respectively. The formation of NDMA was very effectiveness which was inhibited 82.1%, 73.2% at reaction mixture of pH 2.5 adding 3ml of above extracts, respectively. The ground CW, TW1 and TW2 (refer to Table 1) diets were incubated with 10ml simulated saliva and 40 ml gastric juice at 37℃ for 2hrs. NDMA formation was inhibited at all levels of green tea and Measil extracts.

산성강하물의 침착현상에 관한 연구

최금찬,성낙창,김장호,서정민,황성욱 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

We get the conclusion of the ionic components of sample and the concentration of metal elements which is collected for acid composition substances using Dry Deposion, Dust Jar method at five points in Pusan. It appears higher ionic concentration from the last of February to the middle of May. It appears higher ionic concentration according to the increasing of collecting period in cation. It is higher ionic concentration according to the passing of the time at all sites in anion. The sum of cation equivalent concentration is higher than the sum of anion equivalent concentration in comparing ionic equivalent concentration. The equivalent concentration of SO₄^(2-), NO^(3-) that is gussed acid density is predominient in anion.