Jo,Kyung-Yul

조경열,최윤수,석경순 대구효성가톨릭대학교 1986 연구논문집 Vol.32 No.1

A new spectropotometric determination of citric acid was examined using carbonyldiimidazole (CDI) which has been used in petide synthesis. CDI was reacted with citric acid to form yellow acyl-imidazole derivative (λ??443nm) in dichloroethane. This colored reaction was so characteristic with tricarboxylic acid that can be used selective determination of citric acid in common carboxylic acid. As increasing the reaction temperature, the acyl compound was decomposed to produce the substance of which physical property was similar to the hydrolized compound. Citric acied was calibrated in the range of 1-6μg/ml and the extinction coefficient of the acyl-imidazole compound was 28000 in this condition.

한열변증에 따른 중풍 환자의 제반특성 비교

김민경,이인환,신애숙,김나희,김혜미,심소라,나병조,조승연,박성욱,정우상,문상관,박정미,고창남,조기호,김영석,배형섭,Kim, Min-kyung,Lee, ln-whan,Shin, Ae-sook,Kim, Na-hee,Kim, Hye-mi,Shim, So-ra,Na, Byung-Jo,Cho, Seung-yeon,Park, Seong-uk,Jung, Woo Sang 대한중풍순환신경학회 2010 대한중풍.순환신경학회지 Vol.11 No.1

Object : This study was conducted as part of the national project to standardize stroke diagnosis in Korean medicine. In this study, we aimed to evaluate the characteristics of acute stroke between heat pattern group and cold pattern group. Methods : We recruited stroke patients from 5 universities(Kyung-Hee University oriental medical center, Kyung-Hee University East-West Neo medical center, Kyungwon university lncheon oriental medical center, Kyungwon university Songpa oriental medical center and DongGuk university llsan oriental medical center) from April, 2007 until February, 2010. We diagnosed them and selected 463 heat pattern patients and 182 cold pattern patients. Results : We find that the risk factor of smoking, alcohol, diet(prefer to meat) are more associated with the heat pattern group. On the other hand, inflammation history in recent 3 months and diet(prefer to sea food) are more associated with the cold pattern group. RBC, Hg, Hct, TG, CK and Cl are more related to the heat pattern group. CPT, total cholesterol and HDL are more related to the cold pattern group. Tae-eum type takes high distribution of the heat pattern group, and So-eum type takes high distribution of the cold pattern group. Conclusions : This study provides evidence that the heat pattern group have more risk factor than the cold pattern group.

석유정제산업 공정과 공정장비에 기인한 휘발성 유해 대기오염물질(HAPs)의 배출량 산정기법

조완근,권기동,동종인,강경희 한국환경과학회 2004 한국환경과학회지 Vol.13 No.7

Petroleum refineries have been considered as an important emission source for atmospheric volatile hazardous air pollutants(HAPs). The emission source includes petroleum refinery processes and process equipment. The control strategy for volatile HAPs requires emission estimations of these pollutants. However, systematic methods of volatile HAPs emission from petroleum refineries have not yet been established. Accordingly, present study surveyed the estimation method of volatile HAPs emitted from the petroleum refinery processes and process equipment. The emission estimation methods for the petroleum refinery processes are applied for 11 petroleum refining facilities: fluidized catalytic cracking, thermal cracking, moving bed catalytic cracking, compressed engine, blowdown system, vacuum distilled column condensator, natural gas or distilled boiler, natural gas or distilled heater, oil boiler, oil heater and flare. Four emission estimation methods applied for the petroleum refinery process equipment are as follows: average emission factor approach, screening ranges approach, EPA correlation approach and unit-specific correlation approach. The process equipment for which emission factors are available are valves, pump seals, connectors, flanges and open-ended lines.

CONICAL THIN LAYER CHROMATOGRAPHY 에 依한 HALOGEN ION의 分離

趙庚烈 대구 효성가톨릭대학교 1968 연구논문집 Vol.1968 No.3

Halogen ions were separated by employing Conical Thin Layer Chromatography method, layering silica gel on the interior surface of Bunzen funnel. Developing solvent used were: A) scetone, water 20%, B) Butanol 80, Pyridine 40, water 80, ammonia water 5, and C) Butanol saturated with 1.5N-ammonium hydroxide. Developted results showed that A) took 38 minutes, B) took 80 minutes and C) took 110 minutes. Rf values were also measured. Conical thin layer chromatography method took less time and gave a better result in separation than that of papper chromatogaphy and also gave one and two dimensional effects.

서울시 금융기관에 관한 연구 : 은행 금융기관을 중심으로

조경희 梨花女子大學校 師範大學 社會生活科 1988 綠友硏究論集 Vol.- No.30

두 번의 연속적 뇌경색에 의한 양측성 외측연수증후군 1예

조광덕,이덕희,황정숙,민선호,조아현,조경희 대한노인병학회 2004 대한노인병학회지 Vol.8 No.1

헬륨 마이크로파 플라즈마 토치의 개발과 특성에 관한 연구

曺競鉉,朴勇男 한국교원대학교 환경과학연구소 2001 환경연구논문집 Vol.- No.6

MPT는 최근에 개발된 마이크로파 플라즈마로서 수용매에 강하다. 여러 가지의 변형된 형태의 MPT를 개발하여 구조에 따른 플라즈마의 방전되는 형태를 조사한 결과 이중관 토치는 플라즈마 기체를 적게 소모하여 쉽게 플라즈마가 형성되었으나 토치의 끝이 높은 온도에 견디지 못하고 쉽게 상했다. ICP토치와 같은 형태의 삼중관 토치에 석영관을 중심관으로 사용할 때 가장 안정되고 대칭적인 플라즈마를 형성할 수 있었다. 바탕선을 조사해 본 결과 He MPT는 대기 중으로 돌출되어 대기와 많이 혼합되고 질소에 의해 quenching되는 것으로 보여진다. Membrane desolvator를 탈용매화 장치로 사용하여 헬륨 MPT의 감도를 조사해 본 결과 아르곤 MPT와 비교할 때 대부분의 원소에 대헤 검출한계가 10배 이상 높았다. 그러나 여기 에너지가 높은 원소는 비교적 효율적으로 검출할 수 있었다. 헬륨 마이크로파 플라즈마는 적은 양의 플라즈마 기체만 필요하여(약 1.6L/min) 경제적이며 매우 안정된 형태를 보여주었다. 플라즈마의 분광특성을 조사한 결과 들뜸온도 4950 K, 전자 밀도 3.28×10^(14) cm^(-3)로 측정되었다. MPT, which bas been developed recently, is very tolerant to aqueous samples. Several types of MPT have been investigated and is found that the double concentric tube could sustain a stable plasma at a low plasma gas flow rate. However, the tip of torch is easily ruined. Triple concentric torch has shown the best stability and the plasma shape, much like that of ICP, especially when the central channel is quartz. The plasma is exposed and mixed with air as is suggested from the background spectrum, which leads to quenching of He MPT. Sensitivity of helium MPT equipped with a membrane desolvator has shown 10 times lower than that of Argon MPT for most of elements except for the ones with relatively high excitation energy. He MPT requires small plasma flow rate (about 1.6 L/min), stable and simple to use. Excitational temperature and electron number density measured are 4950 K and 3.28 × 10^(14) cm^(-3), respectively.

헬륨 마이크로파 플라즈마 토치의 개발과 특성에 관한 연구

曺競鉉,朴勇男 한국교원대학교 환경과학연구소 2002 환경연구논문집 Vol.- No.7

MPT는 최근에 개발된 마이크로파 플라즈마로서 수용매에 강하다. 여러 가지의 변형된 형태의 MPT를 개발하여 구조에 따른 플라즈마의 방전되는 형태를 조사한 결과 이중관 토치는 플라즈마 기체를 적게 소모하며 쉽게 플라즈마가 형성되었으나 토치의 끝이 높은 온도에 견디지 못하고 쉽게 상했다. ICP토치와 같은 형태의 삼중관 토치에 석영관을 중심관으로 사용할 때 가장 안정되고 대칭적인 플라즈마를 형성할 수 있었다. 바탕선을 조사해 본 결과 He MPT는 대기 중으로 돌출되어 대기와 많이 혼합되고 질소에 의해 quenching되는 것으로 보여진다. Membrane desolvator를 탈용매화 장치로 사용하여 헬륨 MPT의 감도를 조사해 본 결과 아르곤 MPT와 비교할 때 대부분의 원소에 대해 검출한계가 10배 이상 높았다. 그러나 여기 에너지가 높은 원소는 비교적 효율적으로 검출할 수 있었다. 헬륨 마이크로파 플라즈마는 적은 양의 플라즈마 기체만 필요하여(약 1.6L/min)경제적이며 매우 안정된 형태를 보여주었다. 플라즈마의 분광특성을 조사한 결과 들뜸온도 4950K, 전자밀도 3.28×10^14㎝^-3로 측정되었다. MPT, which has been developed recently, is very tolerant to aqueous samples. Several types of MPT have been investigated and is found that the double concentric tube could sustain a stable plasma at a low plasma gas flow rate. However, the tip of torch is easily ruined. Triple concentric torch has shown the best stability and the plasma shape, much like that of ICP, especially when the central channel is quartz. The plasma is exposed and mixed with air is suggested from the background spectrum, which leads to quenching of He MPT. Sensitivity of helium MPT equipped with a membrane desolvator has shown 10 times lower than that of Argon MPT for most of elements except for the ones with relatively high excitation energy. He MPT requires small plasma flow rate(about 1.6L/min), stable and simple to use. Excitational temperature and electron number density measured are 4950 K and 3.28×10^14㎝^-3, respectively.

초등학생의 인터넷 중독 현황 및 원인

조미헌,신경선 한국컴퓨터교육학회 2004 컴퓨터교육학회 논문지 Vol.7 No.5

최근 인터넷 사용이 확산되면서 그 역기능에 대한 우려가 커지고 있다. 특히 인터넷 중독이 주요 이슈로 다루어지며, 인터넷 사용자의 연령층이 낮아지면서 인터넷 중독에 대한 우려는 초등학생에게까지 미치게 되었다. 그러나 인터넷 중독 관련 연구는 중·고등학생들을 대상으로 하여서는 상당수 이루어졌으나, 초등학생들을 대상으로 한 연구는 매우 미흡하게 이루어졌다. 또한 우리나라의 현실에 맞고, 초·중등학생들을 대상으로 사용이 가능하며, 표준화와 타당화 과정을 거친 신뢰로운 검사 도구의 사용이 절설히 필요하다. 이에 본 연구는 그와 같은 필요를 고려하여 개발된 인터넷 중독 검사 도구를 사용하여, 전국의 5,6학년 1.382명의 학생들을 대상으로 인터넷 중독의 현황과 그 원인이 되는 요소들을 분석하였다. 연구 결과, 조사 대상의 5.5%에 해당하는 학생들이 고위험사용자군으로 분류되었고 12.4%의 학생들이 잠재적위험사용자군으로 분류되었다. 또한, 학생들의 인터넷 중독 수준은 성, 학년 등과 같은 '인구학적 요인', 사용 시간, 목적 등과 같은 '인터넷 사용 경험', 가족 형태, 관계 만족도 등과 같은 '가족 관련 특성', 친구관계, 학교생활과 같은 '사회적 활동'등의 4가지 영역외 15가지 변수들에 대해서 유의미한 차이가 있음이 발견되었다. With recent surge of Internet use, many people become concerned with side effects of Internet. Especially Internet addiction has become a significant issue. As Internet users become much younger than before, Internet addiction is salient even among elementary school students. While much research has been conducted on adolescents' addiction, only a little research has been conducted on elementary students' Internet addiction. In addition, it is necessary to use a standardized and reliable evaluation tool that is designed to assess the level of children's and adolescents' Internet addiction. The purpose of this study is to grasp the realities of elementary students' Internet addiction using an evaluation tool developed for elementary and secondary students, and to analyze the factors affecting Internet addiction. A survey was conducted to 1,382 5th and 6th graders selected from nationwide schools. The results of this study shows that 5.5% of the sample students are in the stage of serious addiction, and 12.4% in the stage of early addiction. In addition, the degree of Internet addiction significantly differs by various variables such as demographic factors, the experience of Internet use, family-related traits, and social activities.

카페인 섭취가 400M 자유형 기록에 미치는 영향

조인호,이병두,장경태 韓國體育大學校 1997 論文集 Vol.20 No.-

The purpose of this study was to investigate the ergogenic benefit of caffeine in the performance of a 400 meter swim. Caffeine(5mg/kg) or placebo was administered one hour prior to the swim trial in a double-blind crossover design. Swimming time in each 100m, blood lactate level after exercise, and heart rate at the final minute were measured. The results were as follows: 1. There were significant differences in 300m and 400m swimming times between caffeine and placebo trials. 2. There was significant difference in heart rate measured at the final minute of swimming between caffeine and placebo trials. 3. There was significant difference in blood lactate level at 5 minutes postexercise between caffeine and placebo trials. The results of the study suggest that caffeine ingestion can enhance the performance during short term, intense exercise.