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김성민,이종호,김남열,안강민,최원재,최시호,차미주,이주영,황순정,장정원,명훈,최진영,서병무,정필훈,김명진 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.4
Schwann cells(SCs), an important component of the peripheral nervous system, intract with nerous to mutually support growth and replication for the peripheral nerve regentation. Recently, ading SCs to the lumen of guidance channel is widely tried to improve regeneration or to make regeneration possible over otherwise irreparable gaps. however, it is not easy to isolate and multiplicate SCs as much as enough to help the axonal regeneration. For the allogeneic SCs source for tubular nerve guidance, we developed a little bit improved technique of harvesting and multiplicating SCs. by culturing dispersed dorsal root ganglia in specially designed medium with growth factors and serial processing, we repeatedlly generate relatively homogenous SC cultures. Our technique was compared with other methods of literature using immunostaining methods such as GFAP, S100, BDNF and the total SC count assessment at different time interval after primary culture.
방울토마토중 Dichlofluanid 및 Iprodione의 생산단계별 잔류농약 경시변화
최규일,성기용,정태균,이주환,허장현,고광용,이규승 한국환경농학회 2002 한국환경농학회지 Vol.21 No.4
방울토마토의 생산단계에서의 잔류허용기준 설정과 수확후 저장기간중 경시변화 및 세척에 의한 잔류농약의 감소양상을 파악하였다. 해당약제를 안전사용기준의 기준량 및 배량을 각각 시설재배 포장에서 살포후 10일간 잔류양상을 조사하였고, 실온 및 냉장조건 하에서의 저장실험 및 세척에 따른 전류농약의 잔소량을 파악하여 생산단계부터, 출하, 저장, 소비단계까지의 잔류량을 예측할 수 있는 모델개발을 위한 자료로 이용하고자 연구를 수행하였다. Dichlofluanid와 iprodione은 포장조건에서 반감일수가 기준량 2.2, 3.3일 이었으며, 배량은 3.5, 5.4일로 나타났다. 저장조건하에서의 약제별 반감기는 포장조건보다 잔류량의 감소속도가 느린 것으로 나타나 반감일수가 증가하였고, 세척방법에 의한 잔류농약의 감소량을 조사한 결과 세제 사용시의 평균제거율은 dichlofluanid는 73.7%, iprodione은 64.3%로 나타났고, tap-water 사용시에는 dichlofluanid 73.5%, iprodione 63.5%로 나타났다. 이러한 결과는 작물의 생산단계에서 구한 합리적인 희귀식을 이용하여 잔류농약의 경시변화를 파악하고, 저장 및 세척과정을 거쳐 최종 소비단계에서의 잔류농약의 수준을 평가할 수 있었다. We studied the residual patterns of two fungicides, dichlofluanid and iprodione, in cherry tomato greenhouse after applying with the recommended and double dose. Also, the degradation patterns during storage periods of up to ten days were compared between at room temperature (20℃) and at cold temperature (4℃). Removal rates of fungicides by washing with tap-water and detergent solution (0.1%, 0.2%) were measured. Half-lives of dichlofluanid and iprodione in greenhouse cherrytomato were 2.2~3.5 and 3.3~5.4 days, respectively. During the storage period, the residues were dissipated more slow. Removal rates were 62.8~80.3% by tap-water, 60.4~83.1% by 0.1% detergent solution, and 65.3~77.6% by 0.2% detergent solution. So, we can predict of terminal residues from cultivation period to marketing, storage and consuming.
중력가속도의 변화에 따른 자동운반차량용 서스펜션의 진동모드에 관한 연구
주만식,김민주,이승수,최영철,추정근,김중완,전언찬 동아대학교 해양자원연구소 2000 硏究論文集 Vol.13 No.1
This study is to choose the most proper model for AGV Throughout simulation of behavior of suspension to reduce trial and error because there is no AGV treating heavy weight at harbor loading and unloading at home. Therefore, we estimate the vibration modes of the various suspensions applied to AGV, which is over 75 ton included the weight of two containers using the Matlab in the case of G and 5G, one of the simulation programs.
최정화,이주영 한국의류학회 2002 한국의류학회지 Vol.26 No.11
To evaluate the thermal environments and the workload of farmers in the rice field in summer, this study investigated rice farmers' physiological, psychological responses, work postures, work colthes, air temperature and air humidity during the spraying pesticide in the rice field. Five career farmers (3 males, 2 famales) volunteered as the subjects. During the spraying pesticide in the rice field, physiological responses were monitored continuously. The results were as follows. ₁. Farmers wore only raincoats not pesticide-proof clothing. ₂. The value of WBGT, rectal temperature(T_(re)), mean skin temperature(T_(sk)) were 24.9~28.9℃, 37.8(±0.3)℃ and 33.6(±0.6)℃, respectively. Clothing microclimate temperature(T_(el)) on the chest and backwere 32.5(±2.6)℃ and 33.6(±2.6)℃, respectively(p<0.001). Humidity inside of the clothing (H_(d)) was over 80%RH and heart rate(HR) was 112(±27) bpm. We evaluated that the spraying pesticide was 'heavy work' by the Tre and HR. ₃. To four subjective questionnaires, all farmers expressed 'hard, hot, humid and uncomfortable' without individual difference at the end of works. We suggested that 1) the spraying pesticide in the rice field was a heavy work, 2) because the workload of farmers in the raincoat/pesticide-proof clothing can't be evaluated by only WBGT, assessors should measure physiological, psychological responses as well as thermal environments, 3) to alleviate farmers' heat strain, clothing manufacturers must consider not only the improvement of textile materials and clothing weight but also the designing of personal cooling equipment.
현성 당뇨병이 없었던 알코올 간경화증 환자에서 발생한 공기증신우신장염 1례
최재혁,이용국,김강,김준섭,강혁주,탁우택,이정호,구관민 東國大學校醫學硏究所 2007 東國醫學 Vol.14 No.1
공기증신우신장염은 신실질의 괴사와 자발적인 공기 형성과 연관된 드문 감염질환이다. 대부분 혈당이 잘 조절되지 않는 당뇨 환자들에게서 발생하며 드물게 요로 폐색, 요로 결석, 종양 등에서도 발생한다. 과거 초기의 수술적 치료가 우선시 되었으나 최근에는 항생제 및 조기 진단으로 인해 내과적 치료만으로 성공한 사례가 증가하고 있다. 저자들은 현성 당뇨병이 없었던 알코올 간경화증 환자에서 발생한 공기증신우신장염을 내과적 치료 및 경피적 배농술만으로 치료한 예가 있어 보고하는 바이다. Emphysematous pyelonephritis is an uncommon infection of the kidney associated with parenchymal necrosis and spontaneous gas formation. Most cases occur in diabetic patients and rarely in urinary tract obstruction, stone or tumor. At past, surgical treatment was prior to internal treatment, but recently, successful cases of internal treatment have increased because of the development of antibiotics and early diagnosis. We report an emphysematous pyelonephrtis in 61 years-old non-overt diabetic woman with alcoholic liver cirrhosis, successfully treated by antibiotics and percutaneous drainage.
최병순,한효순,강성주,이상권,강순희,박종윤,남정희 한국과학교육학회 2002 한국과학교육학회지 Vol.22 No.4
학생들의 인지발달을 촉진시켜 학습효과를 높이려고 개발된 CASE 프로그램의 효과를 조사했다. 중학교 1학년(841명) 학생들이 연구에 참가하였으며, 같은 분량의 시간동안 실험반에서는 교육과정에 따른 과학 교과 수업과 '생각하는 과학' 활동을 병행하였고, 통제반에서는 과학교과 수업만을 수행하였다. 연구 초기에 논리적 사고력 검사(SRT II)를 이용하여 집단의 동질성을 비교하고, 2년 동안 실험반에 CASE프로그램을 처치한 후 이질동형겸사도구인 SRT VII을 이용하여 처치별, 성별, 인지수준별 인지가속에 대한 효과를 조사했다. CASE 프로그램에 의한 중학생들의 인지발달 가속효과는 중간검사에서는 보이지 않았으나, 사후검사에서 상당히 큰 것으로 확인되었다. 성별에 따라 CASE 프로그램의 효과를 비교한 결과 남??여 중학생들 모두에게 유의미한 인지가속이 이루어진 것으로 나타났다. 남학생들 보다 여학생들의 인지수준이 더 발달된 것으로 밝혀졌으며, 처치와 성별간 상호작용 효과는 나타나지 않았다. 학생들의 사전 인지수준에 따라 CASE 프로그램의 효과를 분석한 결과, 모든 인지수준에서 처치효과가 뚜렷하게 있었으나 특별한 경향성은 나타나지 않았다. 특히 초기 구체적 조작기(ES=1.1.)와 전조작기(ES=1.07), 그리고 구체적조작 후기(ES=1.01) 학생들에게 상당히 큰 효과가 있었다. 이상과 같은 CASE 프로그램의 성공적인 결과는 현행 우리나라 과학교육과정 개정과 교수방법 개선에 시사하는 바가 많다. In an attempt to accelerate the development of formal reasoning ability of students, 'Thinking Science' activities developed by the Cognitive Acceleration through Science Education(CASE) project were implemented to 841 students in 7th grade aged 12+ in six middle schools over a period of two years. Homogeneity between the CASE group and control group was tested with SRT Ⅱ, while the improvement of formal reasoning ability of the students was tested with SRT Ⅶ. The results were analyzed by treatment, gender, and cognitive levels of the students. Statistically significant gains were shown in the CASE group compared with those in the control group. Cognitive level of girls in the CASE group significantly increased as compared with the control group, while there was moderate effect in boys. These results implied that the thinking science activities were effective in cognitive acceleration of girls aged 12+. It was shown that much more CASE students in pre or concrete operational level shifted. to formal operational level as compared with the control group while there were significant effects in all levels (ES=0.31∼1.10) without showing any tendency.
최정화,김소영,이주영 한국의류학회 2004 한국의류학회지 Vol.28 No.1
The purpose of this study was to develop funtional lab gowns in the view of safety and work efficiency. As the first step of this study, we surveyed on satisfaction rates, preferences and inconvenience items in regard of lab gowns. The data was obtained from 138 graduate students specialized in science and 113 medical students. Respondents answered that the first purpose of wearing lab gown was to protect body from danger. Wearing frequency followed with 'always', 'as possible as', and then 'sometimes' Forty-five percentage of respondents answered that they didn't wear lab gowns often in summer because of hot weather. The contaminated or damaged parts of lab gowns followed with cuffs, abdomen, thigh, lower part, and then chest. Washing frequency followed with 'once a month', 'once per six months', and then 'more than once a week'. There were significant differences in normal wearing frequency, wearing frequency by season and washing frequency due to major. There were no significant difference by sex and major in all questions. In regard of the protective capacity of current lab gowns, most respondents answered that 'It's normal' (60%), ‘It's enough'(21%), so that they didn't show much dissatisfaction. Forty-three percentage of respondents were not satisfied with cuffs. Respondents answered that the cuffs were in danger and inconvenient because of broad cuffs. In regard of color, preference for white were high and followed with ivory, light sky, light green, and then light pink. Materials of current lab gowns were cotton/polyester or polyester 100%. Sixty-eight percentage of respondents were satisfied with that and others were not. The reasons for dissatisfactions were as follows; those materials were not protective to chemicals thoroughly enough. Cotton/polyester materials were heavy. Wearing sensation of polyester 100% was not good.
기능성 실험 가운의 개발 및 평가 : 체온조절 및 온열 쾌적성을 중심으로
최정화,이주영,김소영 한국의류학회 2004 한국의류학회지 Vol.28 No.2
The purpose of this study was to evaluate thermal properties of lab gowns developed from the point of safety and work efficiency. We evaluated thermal and subjective responses of subjects wearing functional new lab gowns(Type B, C, D) and a popular lab gown on the market(Type A). Type B was a new lab gown made of woven fabric with functional cuffs. Type C was a new apron made of woven fabric with arm protectors. Type D was a new lab gown made of non-woven material with functional cuffs and openings around the armpits. Temperature in the climatic chamber was set at 19℃as an indoor temperature in winter and at 24℃ in summer. There were no significant differences in rectal temperature and heart rate among four types of gowns and between two air temperatures for 120min. Mean skin temperature was much higher in the type A and B than in the type C and D(p<.05). In the 19℃air, clothing microclimate temperature on the back was the highest in the type B and was the lowest in the type C (p<.05). Clothing microclimate humidity was not significant differences among gowns. In subjective responses, subjects perceived that Type B was the warmest gown in the 19℃ and the hottest and more humid in the 24℃ than other gowns. Inversely, type C was the coolest gown among four gowns. Both in the 19℃and in the 24℃, the Type D had gained most responses of being comfortable. In conclusion, the temperature difference of 5℃ was more of an influencing factor than the difference from four types of lab gowns. Secondly, we recommend the manufacturers to make lab gowns with functional cuffs for safety purposes. Thirdly, the spread of the type of apron with arm protector will contribute to increase of the frequency of wearing in summer. Fourthly, it is necessary to study continuously about lab gowns with non-woven materials for researchers exposed to toxic chemical and biological materials.