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Development of Microbial Fuel Cells Using Proteus vulgaris
김남준,최영진,정선호,김성현,Kim, Nam Jun,Choe, Yeong Jin,Jeong, Seon Ho,Kim, Seong Hyeon Korean Chemical Society 2000 Bulletin of the Korean Chemical Society Vol.21 No.1
Microbial fuel cells comprising the microorganism P. vulgaris, thionin as a mediator, and various mono- and disaccharides in an anodic compartment have been developed. A cathodic compartment containing a Pt electrode and Fe$(CN)_6^{3-}$ was separated from an anode by the Nafion membrane. From absorbance-time measurements, it was found that the absorbance of thionin was not altered by the addition of P. vulgaris, even in the presence of sugars. However, thionin was effectively reduced when P. vulgaris was present. These results differ substantially from the case of safranine O, a phenazine-derivative, indicating that thionin takes up electrons during the metabolic oxidation processes of carbohydrates. Maximum fuel cell efficiency was observed at 37 $^{\circ}C$, optimum temperature for the growth of P. vulgaris, and 0.5 V cell voltage was obtained, which indicates that the metabolism of the microorganism directly affects the efficiency. Thionin concentration was closely related to cell performance. When the charging-discharging characteristics were tested with glucose, galactose, sucrose, maltose, and trehalose as carbon sources, galactose was found to give the highest coulombic efficiency. Cell performance was almost fully recovered with only small degradation when glucose and sucrose were used in the repetitive operation. Current was maintained nearly twice as long for sucrose than in the case of glucose.
김남준(Nam Jun Kim),김상아(Sang-A Kim),박웅섭(Woong-Sub Park) 한국농촌의학 지역보건학회 2017 농촌의학·지역보건 Vol.42 No.4
이 연구는 여중생의 수면과 정신건강의 상호연관성을 분석하기 위하여 질병관리본부가 수행하고 온라인을 통해 공개하고 있는 2016 청소년건강행태온라인조사 원자료 중 중학교 여학생의 조사결과인 15,477명을 연구대상으로 하여 분석하였다. 연구결과 일반적 변수들과 흡연, 음주, 수면의 질, 수면시간을 모두 통제하여도 수면시간이 길수록 스트레스 인지율, 우울감 경험률, 자살 생각률이 유의하게 낮았으며, 또 충분한 수면여부에서 ‘그렇다’라고 답한 경우 스트레스 인지율, 우울감 경험률이 그렇지 않은 경우에 비해 유의하게 낮았다. 이 같은 연구결과 여중생의 수면시간과 질은 정신건강의 관련성이 있었기 때문에 향후 여중생들의 정신건강에 영향을 미칠 수 있는 수면시간과 질에 대한 추적연구를 포함하여 수면과 정신건강에 대한 스트레스와 우울감의 매개효과 분석과 같은 심층적인 연구와, 청소년의 수면 제한 요소를 줄일 수 있는 정책마련이 필요하다. Objectives: The purpose of this study was to examine the relationship between sleep and mental health in middle school female students. Methods: For this purpose, We analyzed the data of 15,477 for middle school female students among the 2016 Korea Youth Risk Behavior Web-based Survey by multiple logistic regression based on the complex sample design. Results: Sleep duration of middle school female students in Korea were significantly associated with perceived stress, depressive experience, and suicidal idea, and subjective sleep satisfaction were significantly associated with perceived stress, depressive experience in results of multiple logistic regression. Conclusion: Sleep duration and subjective sleep satisfaction have a significant impact on the mental health of middle school female students. Therefore, in-depth research and policies to mental health of middle school female students through sleep duration and subjective sleep satisfaction increase are required.
단축발 운동을 적용한 벽 스쿼트 운동이 엎침발을 동반한 만성 허리통증환자의 통증과 골반 정렬에 미치는 영향
김남준 ( Nam-jun Kim ),이한숙 ( Han-suk Lee ) 대한물리의학회 2021 대한물리의학회지 Vol.16 No.4
PURPOSE: This study examined the effects of wall-squat with short-foot exercise on pain, dysfunction, and pelvic alignment in chronic low back pain patients. METHODS: Thirty outpatients diagnosed with chronic low back pain and pronated foot were enrolled in this study. The patients were divided randomly into a wall-squat with short-foot exercise group (WS; n = 15) and a normal wall-squat exercise group (NW; n = 15). These groups performed their respective exercises 15 times, for three sets, three times a week over six weeks. The visual analogue scale (VAS) was used to measure the subjects’ pain, and the Roland-Morris disability questionnaire (RMDQ) was used to measure the subjects’ dysfunction. A navicular drop test (NDT) was used to measure the subjects’ arch height. To assess the patients’ pelvic alignment, their lordosis, sacral tilt, lumbar width, sacral width, ilium length, and ilium width were measured by X-ray imaging. RESULTS: Both the WS and NW groups exhibited significant decreases in their VAS and RMDQ scores after exercise (p < .05). The WS group exhibited significant increases in their arch height (p < .05). Significant differences in the VAS, sacral tilt, sacral width, and ilium length were observed between the WS and NW groups (p < .05). CONCLUSION: These results suggest that wall-squat exercise is effective in decreasing the level of pain and dysfunction in chronic low back pain patients. In addition, the wall-squat with short-foot exercise is considered more effective in improving the pelvic alignment than without short-foot exercise. This can be an effective method for the non-pharmacological and non-surgical treatment of chronic low back pain
김남준 ( Nam Jun Kim ),최우찬 ( Woo Chan Choi ),김건우 ( Geon Woo Kim ),전혜진 ( Hye Jin Jeon ),방세권 ( Se Kyeun Bang ),이봉효 ( Bong Hyo Lee ),김희영 ( Hee Young Kim ) 대구한의대학교 제한동의학술원 2015 제한동의학술원논문집 Vol.13 No.1
1) 목적(Objectives):The warm needle acupuncture techniques (WNAT) combines the acupuncture effects and heat generated by moxibustion. Although stainless steel needles have been used empirically for WNAT, stainless steel needle has extremely low thermal conductivity and may not deliver designable heat to acupuncture points. The present study compared thermal conductivity of several types of needles made from iron, silver or stainless steel and developed a method enhancing thermal conduction in stainless needle. 2) 방법(Methods):We measured temperatures reaching at 1cm or 2.5 cm from moxa using a digital thermometer (DT-3891F, CEM, Shenzhen, China). and the types of iron, silver or stainless steel needles were compared. Effects of insulation paints on thermal conduction of stainless steel needles were also explored. 3) 결과(Results) 및 결론(Conclusions):Silver needle and traditional needle showed high thermal conductivity while marked heat loss was seen in stainless steel needles. Coating of insulation paint in stainless steel needle prevented the heat loss during WNAT,
김남준 ( Nam Jun Kim ),박승준 ( Seung Joon Park ) 한국환경기술학회 2023 한국환경기술학회지 Vol.24 No.1
This paper classified chemical accidents that occurred in Korea during the research period (2014-2021) according to types and regions, and analyzed substances that cause chemical accidents. In addition, this paper performed a regression analysis to see if weather factors such as temperature, atmospheric pressure, relative humidity, visible distance, and wind speed were correlated with the occurrence of chemical accidents. For each meteorological element, the measurement value of the synoptic point of the Korea Meteorological Administration was used, and the analysis was performed in consideration of the frequency of appearance of each meteorological element. Among them, temperature, atmosphere pressure, relative humidity and visible distance were found to have a significant correlation with chemical accidents. Through this study, the basis for conducting risk analysis by meteorological factors other than the risks of processes or facilities inside chemical substances handling plants was laid.
젊은 여자에서 체중 감량을 위한 한약 복용 후 생긴 우측 허혈성 대장염 1예
김남준 ( Nam Jun Kim ),김충훈 ( Chung Hun Kim ),조진현 ( Jin Hyun Cho ),고성민 ( Sung Min Ko ),민병훈 ( Byung Hoon Min ) 대한장연구학회 2011 Intestinal Research Vol.9 No.3
Ischemic colitis has a relatively high prevalence in the elderly population with underlying vascular disorders such as hypertension and usually occurs on the left side of the colon. However, ischemic colitis also rarely occurs in healthy young adults with no risk factors. Herbal medication use is increasing, particularly for weight loss. Ischemic colitis associated with herbal medication use has been rarely reported. Here, we describe a case of right-sided ischemic colitis in a young woman that was potentially linked to the use of herbal medication. An 18-year-old woman was admitted to our emergency department with abdominal pain and bloody diarrhea for 1 day. Her medical history was unremarkable for bowel ischemia risk factors. However, she had taken herbal medication for weight loss for the past 2 weeks. Abdominopelvic CT showed diffuse wall thickening with decreased mucosal enhancement from the ascending to the transverse colon. A colonoscopic biopsy specimen showed coagulative necrosis of the mucosa, hemorrhage, and inflammatory cell infiltration. The abdominopelvic CT, colonoscopy, and biopsy findings were compatible with ischemic colitis. Her abdominal pain and bloody diarrhea improved completely with conservative management, and she was advised to discontinue the use of herbal medications. (Intest Res 2011;9:230-233)