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니켈 / 금속수소 축전지의 금속수소 전극에 관한 연구 (Ⅰ)
김정선,조원일,조병원,윤경석,김상주,신치범 ( Jeong Seon Kim,Won Il Cho,Byung Won Cho,Kyung Suk Yun,Sang Ju Kim,Chee Burm Shin ) 한국공업화학회 1994 공업화학 Vol.5 No.1
고성능 니켈/금속수소 축전지를 개발하기 위하여 전극용량도 비교적 높고, 합금가격이 저렴한 Mm계 전극에 대하여 P-C-T 특성, 충방전 특성, microencapsulation 방법 및 그 효과 등에 관한 연구를 수행하였다. P-C-T 특성조사로부터 플라토압력, 수소저장량을 구하였는데, Mm계 합금인 경우는 각각 0.4 기압, 310 mAh/g으로 나타났다. Microencapsulation 처리를 함으로써 도전재를 혼합한 전극보다 전극용량 및 전극의 안정성을 향상시켰으며, 또한 전처리없이 microencapsulation처리가 가능하였다. Microencapsulation 처리한 Mm계 합금의 전극용량은 240-250 mAh/g(0.2 C)이었다. A study on Mm type electrode which is relatively high in electrode capacity and low in material cost was performed to develope high performance nickel-metal hydride battery. The electrode characteristics were investigated by P-C-T, charge-discharge and microencapsulation treatment experiments. The plateau pressure and hydrogen absorption capacity obtained from the P-C-T experiment were 0.4 atm and 310 mAh/g, respectively. The electrode capacity and stability of microencapsulated electrode were improved than those of conductor mixed electrode and the microencapsulation was possible without pretreament. The electrode capacity of microencapsulated Mm type alloy was 240∼250 mAf/g(0.2 C).
곤쟁이 , Archaeomysis kokuboi 에 미치는 phenol 의 급성 및 만성독성
김정선,진평 ( Jeong Seon Kim,Pyung Chin ) 한국수산과학회 1995 한국수산과학회지 Vol.28 No.1
Acute and chronic toxicity of phenol on the mortality, long-term survival and respiration rates of the mysid, Archaeomysis kokuboi adult and juvenile were examined. This experiment was conducted by static bioassay procedure with the different salinity at 25℃. In lethal test, the test animals were exposed to 6 different phenol concentrations to determine LC_(50) and LT_(50) (median lethal concentration and time) values. The LC_(50) values with the exposure time for the mysid adult ranged from 31.31ppm to 1.49ppm phenol and for the mysid juvenile ranged from 6.90ppm to 0.26ppm in all experimental groups. Mortality was increased with the decrease of salinity. The 96hr-LC_(50) values at 16, 24 and 32‰ salinity for the mysid adult were 1.49, 2.71 and 4.53ppm phenol, while the values for the mysid juvenile were 0.26, 0.56 and 0.71ppm, respectively. The ratios of 96hr-LC_(50) values for the mysid adult to those for the mysid juvenile at 16, 24 and 32‰ salinity were 5.73, 4.84 and 6.38, respectively. The mysid juveniles were more sensitive to phenol than the mysid adults. Compared LT_(50) values for the mysid adult with those for the mysid juvenile, the LT_(50) values for the mysid adult ranged from 384.7 to 29.0 hours at 1.7∼12.7ppm phenol concentrations and for the mysid juvenile ranged from 132.2 to 18.7 hours at 0.5∼6.0ppm phenol concentrations. The lowest LT_(50) values for the mysid adult and juvenile were showed at the combination of the highest experimental concentration of phenol and the lowest experimental salinity. The mysid juveniles showed lower LT_(50) values than those of adults. The chronic effects of phenol on the mysid at the sublethal effective concentration of phenol were lower in the 32‰ salinity group than 16 or 24‰ salinity groups. Oxygen consumption rates of the mysid adult were decreased with the increase of phenol concentration and exposure time, and decreased significantly in lower salinity at the same concentration of phenol.
기능적 전기자극 치료기를 이용한 중풍구두가 편마비 환자의 보행에 미치는 영향
김정선,박지환,Kim, Jeong-Seon,Park, Ji-Whan 대한정형도수물리치료학회 2007 대한정형도수물리치료학회지 Vol.13 No.1
Purpose: An objective analysis and observations were to be done on hemiplegia patients that are wearing a walking support device, Stroke shoes. Their improvements in walking pace, the reduction of distance between the two knee joint, the increase of curve angle of the knee joint and their steps and the reduction of ankle joint upon swing phase were analyzed using a 20 walking analyzer. Methods: An examination was carried out to see the patients' communication skill and independent walking and then let them walk with the Stroke shoes on to get results before and after wearing it. Simi Reality Motion Systems GmbH (Germany, 2007) was used to analyze the results regarding knee joint and ankle joint angle changes of sagitta plane and coronal plane, stepping distances, distances between the knees and walking pace. Results: 1. The articulation angle of ankle joint during swing phase decreased and knee joint has shown a statistically significant increase in such value(p<0.05). 2. Only knee joint showed a significant increase in articulation angle during heel strike(p<0.05). 3. Knee joint showed a significant increase in articulation angle during toe off(p<0.05). 4. The distance between the two knees as well as their foot steps significantly decreased compared with when Stroke shoes were not worn(p<0.05). 5. Stroke shoes with FES have shown positive effects on the patients in improving their walking styles overall. (p<0.05). Conclusion: There was an improvement in rotation walking pattern by a reduction in the distance between the knees after wearing Stroke shoes with FES. Plantar flexion reduced that occurred in ankle joint during walking and flexion angle increased in knee joint, both of which improved foot drop which was a major problem in hemiplegia patients. Also it is believed that the device will have some positive influences on knee joint stiffening paralysis to aid in improving inefficient walking phases.
중환자실 간호사의 섬망 지식, 섬망 이미지 및 섬망 사정 정확도: 예비 연구
김정선(Kim Jeong Sun),이수하(Lee Su Ha),이승현(Lee Seung Hyun),정미선(Jeong Mi Seon) 전남대학교 간호과학연구소 2019 Nursing and Health Issues(NHI) Vol.24 No.1
Purpose: The purpose of this study was to identify the general characteristics of intensive care unit nurses and investigate their knowledge and images of delirium, as well as the accuracy of their delirium assessments. Methods: This was a descriptive pilot study. The participants were 84 nurses in intensive care units in two advanced general hospitals. Data were collected using nurses’the knowledge and images of delirium and the accuracy of delirium assessment. Data were analyzed using descriptive statistics. Results: The mean score of nurses’knowledge of delirium was 74.6 out of 100. With regard to their images of delirium, alternatively,“uncooperative” received the highest, while “lethargy” received the lowest score on the list. The mean score of the accuracy of their delirium assessments was 60 out of 100. Conclusion: This pilot study’s results can serve as basic data to develop proper delirium education programs for nurses. These findings suggest that increasing nurses’knowledge about and reducing their negative images of delirium can have a positive impact on the accuracy of their delirium assessments.
IgA 신증 환자에서 valaciclovir 복용 중 발생한 급성 신부전
김정선 ( Jeong Seon Kim ),김혜원 ( Hye Won Kim ),이재원 ( Jae Won Lee ),최혜민 ( Hye Min Choi ),박상원 ( Sang Won Park ),이영모 ( Young Mo Lee ),이지은 ( Ji Eun Lee ),권영주 ( Young Joo Kwon ),표희정 ( Heui Jung Pyo ) 대한신장학회 2008 Kidney Research and Clinical Practice Vol.27 No.2
Valaciclovir is L-valyl ester of acyclovir which has the antiviral effect against herpes zoster virus and Cytomegalovirus. Its adverse effects were reported as nephrotoxicity and neurotoxicity. Although the mechanism of nephrotoxicity of valaciclovir is indeterminate, several hypotheses such as obstructive uropathy and interstitial nephritis have been suggested. We experienced a 54-year-old female patient with IgA nephropathy who developed acute renal failure after taking valaciclovir. She did not develop either central neuropathy or respiratory muscle weakness. The serum creatinine was normalized after 6 days by withdrawal of valaciclovir and hydration. When we use valaciclovir in the elderly or patients with preexisting renal disease, we should monitor the renal function carefully.