농산물 소독과정에서 브롬화메틸에 노출된 근로자에게 발생한 신경병 2례

박태혁,김정일,손지언,김종국,김형수,정갑열,김준연 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.4

목적 : 농산물 소독과정에서 브롬화메틸에 노출된 근로자에게 발생한 신경병 2례 보고. 방법 : 피로감, 전신무력감, 어지럼증, 보행장애 등의 증상을 주소로 내원한 브롬화메틸을 사용하여 방역작업에 종사하는 건강한 20세와 18세의 근로자를 대상으로 혈액검사, 신경정도 및 근전도검사, 뇌자기공명영상 등의 임상검사와 작업력조사를 시행하였다. 결과 : 1례에서 뇌자기공명영상에서 연수와 소뇌의 양측 측충부의 고신호강도가 관찰되었고 11일 후의 추적조사에서 동일 부위의 고신호강토가 감소된 소견이 관찰되었으며 뇌병증으로 최종 진단되었다. 다른 1례는 신경전도검사에서 다발성 신경병 소견과 뇌유발전위검사에서 우측 하부 뇌간부위 병소가 관찰되었고 뇌병증 및 말초신경 병으로 최종 진단되었다. 결론 : 근로자들의 증상은 소독과정에서 브롬화메틸 노출로 인한 신경 병으로 판단되며 훈증소독과방역작업에 종사하는 근로자들의 실태조사와 안전에 대한 대책이 시급하다고 하겠다. Objectives : To report two cases of neuropathy due to methyl bromide intoxication. Methods : Workers, engaged in the fumigating process, complained fatigue, general weakness, ataxia, and hypersomnia. We evaluated them with blood tests, neurophysiologic studies and MRI and investigated their occupational history. Results : Increased signal intensities were found in the medulla oblongata and paraver mian of cerebellum in MRI and after 11 days, high signal intensities were reduced in the following MRI. In the other case, polyneuropathy and rlght lower brainstem lesion were observed In the NCV and BAEP studies. Conclusions : We confirmed that worker's symptoms were related to methyl bromide exposure in the fumigation. It is necessary that we should evaluate present condition of fumigating process and prepare appropriate methods to protect workers engaged in the fumigation.

직접 황 회수공정에서 Ce_(1-x)Zr_(x)O₂촉매를 이용한 반응특성 연구 : H₂O 와 석탄가스의 영향 Effect of H₂O and Coal Gas

김봉석,이종대,전진혁,박노국,류시옥,이태진,김재창 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.2

본 연구는 직접 황 회수공정에서 H_(2)O와 석탄가스의 영향에 대해서 조사하였다. Ce_(0.8)Zr_(0.2)O_(2)촉매를 이용하여 H_(2)O가 반응에 미치는 영향을 조사한 결과, 산화제인 H_(2)O의 첨가에 의해 반응가스의 환원력이 저하됨을 알 수 있었다. CO/H_(2)O-TRP 실험을 통해서는 반응온도 영역에서 water gas shift 반응이 일어나는 것을 확인 할 수 있었고, H_(2)O의 재산화 실험으로부터 환원된 촉매가 H_(2)O에 의해 재산화 됨을 알 수 있었다. Ce_(0.8)Zr_(0.2)O_(2) 촉매하에서 석탄가스를 환원제로 사용하여 반응온도 (500℃), 공간속도(30,000 ㎖/g-catㆍh), [CO+H_(2)]/[SO_(2)] 몰비(2.5)의 반응조건에서 실험한 결과 최대 75.8%의 원소 황 수율을 얻을 수 있었다. 이는 환원제로 석탄가스를 이용함으로써 H_(2)O에 의한 부반응을 억제할 수 있었으며 경제적인 측면에서 유리하므로 공정기술의 실증화 가능성을 향상시킬 수 있음을 확인할 수 있었다. The effect of H₂O and coal gas on a direct sulfur recovery process using Ce_(1-x)Zr_(x)O₂ catalysts was investigated in this study. As the reducing power of reactants was lowered in the present of H₂O, the activity of catalysts decreased. Temperature programmed reduction experiments showed that a water gas shift reaction took place in the temperature range of this study and that the reduced catalyst was re-oxidized by H₂O. DSRP was carried out on Ce_(1-x)Zr_(x)O₂ catalysts using a coal gas as a reductant. Maximum 76.8% yield of elemental sulfur was obtained at 500℃ with a space velocity of 30,000㎖/g-cat·h and [CO+H₂]/[SO₂] ratio of 2.5. The side reaction by H₂O could be inhibited using a coal gas.

비침습적 검사를 이용한 수술후 하지 심부 정맥 혈전증의 감시

김영욱,정한준,윤봉호,김신윤,이상국,변경환,김태헌 경북대학교 병원 1997 경북대학교병원의학연구소논문집 Vol.1 No.1

Deep vein thrombosis is recognized as a common complication in surgical patients in western countries especially in patients with high risk factors. The purposes of this study were to detect leg DVTs in early postoperative period by non-invasive surveillance and to analyze the risk factors of DVT. One hundred seventy one patients who underwent major operations(67 curative resection of colorectal cancer, 64 total hip replacement, 38 femur operation for fracture, and 2 colon resections for benign colon disease) were included for the prospective surveillance of leg DVT within 2 weeks after the operations. For the surveillance of leg DVT, strain gauge plethysmography(SPG) and Duplex scanning of both legs were completed for all patients except 10 patients. These 10 patients were examined in only one leg. The patients with past history of leg DVT or under prophylactic anticoagulant therapy were excluded from this study. To determine the risk factors related with leg DVT formation, age and sex of the patients, indication of surgery or surgical procedures, duration of operation, position during the operation, duration of postoperative immobilization, and preoperative serum level of antithrombin III (AT- III) were analyzed using Chi-square test. After performing SPG of 342 legs, 38 legs, showed abnormal on venous outflow/venous capacitance discriminant line chart, and 13 legs of 12 patients showed the finding(s) suggesting DVT on duplex scanning. Among the patients with abnormal duplex findings, 7 limbs(53.8%) were symptomatic, but the remaining 6 legs were silent. In 6 (15.8%) patients of 36 femur operations, 3(4.7%) of 64 total hip replacements and 3(4.5%) of 67 curative resections of colorectal cancer developed DVT by duplex scanning in the iliac(5), femoral-popliteal(6), and isolated calf(2) veins. After analyzing the risk factors, we could not find any statistically significant(p<0.05) factor related with leg DVT.

기포유동층 반응기 내에서 천연제올라이트를 사용한 아연계 탈황제의 반응특성연구

김동현,정용길,박노국,이종대,전진혁,류시옥,이태진 한국공업화학회 2003 응용화학 Vol.7 No.2

To improve attrition resistance, calcium oxide was added to durable ZZF sorbent. It was named ZZFCa sorbent. The reactivity of ZZFCa sorbent was investigated in the fluidized-bed reactor. The influencesof the sulfur capacity and the regeneration time for various fluidization velocities from 0.07㎧ to 0.20㎧ were investigated for 5-cycles. As a result, ZZFCa sorbent appeared the high sulfur capacity abouve 10gS/100g sorbent. The sulfur capacity of ZZFCa was maintained, although fluidization velocities increased.

고등학교 1학년 학생들의 인지수준과 과학의 물질 단원 내용수준 비교 분석 및 교사들의 인식

김성숙,박소영,정미현,류상미,강성주,박국태 韓國敎員大學校 敎育硏究院 2009 敎員敎育 Vol.25 No.4

The purpose of this study was to seek for improved teaching and learning methods by comparatively analyzing the cognitive level of 10th grade students and the content level of high school science textbooks's matter unit and examining the teacher's understanding of these issues. For this study, the cognitive level of 336 10th grade students from 4 areas were analyzed using SRT Ⅲ (Science Reasoning Task Ⅲ) and the content level of 10 scientific concepts selected from the matter unit of high school science textbooks were analyzed using CAT (Curriculum Analysis Taxonomy). How high school science teachers understood these issues was also examined. The result showed that 51% of the research subjects were the formal operational level, 30% of the transitional level, and 19% of the concrete operational level. The percentage of students of the formal operational level varied according to each school. The scientific concepts of the matter unit of the 6 high school science textbooks were mostly of the early formal operational level. However, the content level of the same scientific concept varied according to each textbook, since the level of each textbookordiexpdeining scientific concepts to students and the answers theyiexpected from students were different. Furthermore, high school science teachers considered the content level of the scientific concepts lower than the actual content level analyzed through teptsAT. Such d6 harmonyibetween the cognitive level of students and the content level of the scientific concepts and the wrong conceptt. Furtteachers of the content level of the scientific concepts effects the students' understanding of scientific concepts and teaching-learning methods. I Furder to solve the discordance between the level of students and scientific concepts and to increase the understanding of students of scientific concepts, teachers should develop the appropriate teaching and learning methods that considers the cognitive level of students and content level of scientific concepts, by analyzing the cognitive level of students and understand the content level of scientific concepts of science textbooks, prior to class. 이 연구는 고등학교 1학년 학생들의 인지수준과 고등학교 과학 물질 단원의 내용수준을 비교 분석하고, 이에 대한 공통과학 교사들의 인식을 알아봄으로써, 교수 학습 방법에 대한 시사점을 얻고자 하는 것이다. 연구를 위하여 4개 지역의 고등학교 1학년 학생 336명 을 대상으로 SRT Ⅲ(science reasoning task Ⅲ)를 사용하여 인지수준을 조사하였으며, 고등학교 과학 물질 단원에서 10개의 과학 개념을 추출하여 CAT (curriculum analysis taxonomy) 분석틀로 내용수준을 분석하였다. 그리고 이에 대한 공통과학 교사들의 인식을 조사하였다. 연구 결과에 의하면, 고등학교 1학년 학생들의 51%가 형식적 조작가 수준이었으나, 30%의 학생들과 19%의 학생들은 각각 과도기 수준과 구체적 조작기 수준이었으며, 형식적 조작기 수준의 학생 비율은 학교별로 차이가 있었다. 고등학교 6종 과학교파서에 제시된 물질 단원 과학 개념들의 내용수준은 대부분 초기 형식적 조작기 수준이었으니, 같은 과학 개념이라도 설명하는 수준과 학생들에게 요구하는 답변의 수준 차이로 인해 교과서별로 내용수준에 차이가 있었다. 그리고 과학교사들은 과학 개념의 내용수준을 CAT 분석틀로 분석된 실제의 내용수준에 비해서 낮게 인식하고 있었다. 이러한 학생들의 인지수준과 과학 개념의 내용수준의 불일치와 과학교사들의 과학 개념 내용수준에 대한 잘못된 인식이 학생들의 과학개념에 대한 이해도와 교수-학습에 영향을 미칠 것이다. 그러므로 학생들의 인지수준과 과학 개념 내용수준간의 불균형을 해소하고 과학 개념에 대한 학생들의 이해도를 높이기 위해서는 과학교사들이 학생들의 인지수준과 과학 개념의 내용수준을 사전에 파악하여, 학생들의 인지수준과 파학 개념의 내용수준을 고려하는 교수-학습 전략이 필요하다.

釜山大 男學生의 體力 및 身體遂行 能力에 關한 硏究

金泰運,徐國雄,金命祚,趙福德,黃喆文 釜山大學校 附設 體育科學硏究所 1988 體育科學硏究所 論文集 Vol.4 No.-

The purpose of this study was measure height, weight, chest girth, sit and reach, grip strength, back strength, % body fat and VO₂max for freshman students majoring in engineering in Puasn National University. In comparison with the results of other studies, the following conclusion were drawn. A. Height(172 ±4㎝) and weight(62 ±7㎏) were increased, but chest girth(87 ±6㎝) decreased. B. VO₂max(2.4 ±0.31/min 38 ±38 ±6ml/㎏/min) and % body fat (7 ±4%) were significantly low. C. Questionaire revealed 16% of subjects exercise 4∼5 hours per week D. Questinmaire revealed that smokers and drinkers are 18%, 86% respectively.

SO_2 제거반응에서 Ce_1-xZr_xO_2 촉매의 Ce/Zr 몰비에 따른 반응성 연구

김봉석,이종대,박노국,이태진 한국공업화학회 2003 응용화학 Vol.7 No.1

The catalytic reduction of S0_2 to elemental sulfur by CO over CezrO_2 was studied in this work. The Cezr0_2 catalysts were prepared with a change in Ce/Zr mole ratio (Ce_l-xZr_x0_2, x=1, 0.8, 0.5, 0.2, 0). We investigated reactivity of Ce_1- xZr_x0_2 in accordance with experimental conditions, such as reaction temperature, space velocity(GHSV). The Ce_0.8Zr_0.2O_2 and Ce_0.5Zr_0.5O_2 catalysts showed the S0_2 conversion of 93% and elemental sulfur selectivity of 98% at temperature above 425 ℃, superior reactivity than other catalysts, The cerium based catalysts with zirconium were improved oxygen mobility and degree of reduction Ce^4+. It is important to control mole ratio between Ce and Zr because of the surpassing oxygen mobility and degree of reduction Ce^4+.

과학자에 대한 초등학교 일반 학생과 과학 영재반 학생의 인식 비교 분석

김소형,박재일,정진수,이혜정,권용주,박국태 한국초등과학교육학회 2005 초등과학교육 Vol.24 No.1

This study was designed to compare the understanding of ordinary elementary school students and scientifically gifted students about scientists. 473 fourth, fifth, and sixth graders in ordinary elementary schools and 40 students attending scientific educational institutions for the gifted were studied with the help of questionnaires and interviews. The survey showed that there were no significant differences between the two subject groups in relation to the external images of scientists. The subjects turned out to have four fixed external images. The scientifically gifted students had a better understanding of the internal images of scientists than ordinary elementary school students. Both the subject groups turned out to be influenced by the press media and off-campus education, thinking that scientists served as inventors producing something useful in daily life rather than as researchers studying natural phenomena or laws. It was found out that both groups admired Edison. The ordinary students respected Einstein and Jang Yeong-Sil whereas the scientifically gifted students respected Curie, Jang Yeong-Sil, and Nobel. The subjects admired them because of their achievements instead of their backgrounds or individual characteristics.

흡착제로써 폐자원을 이용한 염색폐수의 색도제거

김은호,성낙창,김수생,김국태,이영형 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.1

Dyeing has always had a pressing need for techniques that allow economical pretreatment for color removal in wastewater. The effectiveness of adsorption for color removal from dyeing wastwater has made it an ideal alternative to other expensive treatment options. This study deals with an investigation on four waste resources locally available in dyeing wastewater treatment for color removal. Peat, bentonite, slag and fly ash were utilized for this study and their performance evaluated against that of granular activated carbon. Color of dyeing wastewater was high removed in peat, bentonite and slag except for fly ash. In point of recycling, if waste resources substituted for a valuable adsorbent such as granular activated carbon, peat, bentonite and slag could look forward to an expected economical effect.

비ST분절상승 급성관동맥 증후군 환자에서 N-terminal Pro B-type Natriuretic Peptide(NT-proBNP)를 이용한 관동맥 협착의 중증도 및 초기 위험도 평가

김기석,한혜숙,황경국,연태진,김동운,조명찬 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2