http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
흡인성 폐렴 환자에서의 비디오투시 연하검사의 빈도와 특성
Myunghoon Moon,고성화,신용일,Ji-Hong Min 대한연하장애학회 2018 대한연하장애학회지 Vol.8 No.1
Objective: This study was conducted to identify the frequency of videofluoroscopic swallow study (VFSS) and characteristics of VFSS findings in the patients diagnosed with aspiration pneumonia. Method: We retrospectively reviewed the medical records of 2,885 patients who has been diagnosed with aspiration pneumonia either clinically or radiographically. Overall, 811 patients could not be examined because of medical problems. The rest of the subjects were divided into two groups according to the presence of neurologic deficit. The findings of VFSS were scored using the Penetration-Aspiration Scale (PAS) and Pharyngeal Residue Grade (PRG), and data were analyzed based on descriptive statistics, the χ2 test, t-test, ANCOVA and logistic regression. Result: A total of 1,267 subjects (43.9%) underwent VFSS. Among patients who could be examined, 61.1% were tested. Only 26.7% of subjects without neurologic deficit underwent VFSS, while 56.5% of the subjects in the other group underwent the procedure. The PAS and PRG scores did not differ significantly between groups. About 32.7% of the findings showed silent aspiration (PAS 8), which difficult to detect by bedside screening tests. Conclusion: Subjects with neurologic deficit showed significantly higher test rates than the others. There were no significant differences in VFSS findings between groups. Dysphagia should be evaluated in patients with aspiration pneumonia using precise tools, such as VFSS and fiberoptic endoscopic evaluation of swallowing (FEES), regardless of presence of neurological deficit.
Ferrous Iron Oxidation by the Immobilized Cells of Acidithiobacillus ferrooxidans
Gyeommin KIM,Myunghoon MOON,Tae Wan KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
This study was aimed to develop the efficient bioprocess for ferrous iron oxidation by immobilized cells of Acidithiobacillus ferrooxidans. First, the medium was statistically optimized to minimize jarosite, a major ferric iron precipitate, based on response surface methodology (RSM). The results of RSM optimization predicted that the jarosite formation would be minimized in a medium at pH 1.8 which contains 2.75g/L of (NH4)2HPO4, 0.3g/L of MgSO4·7H2O, 0.15g/L of KCl, and 45g/L of FeSO4·7H2O. Then, based on the previous report that jarosite formed on the matrix surface helps the adhesion between the cells and the matrix, cell immobilization was performed by incubating flasks containing 9K medium, celite beads and A. ferrooxidans cells, which are favorable conditions for jarosite formation. After recovered, the immobilized cells were cultivated in the optimized medium in a repeated batch mode. It was observed that as the batch culture was repeated 5 times, the ferrous iron oxidation rate increased by 58% from 0.226 to 0.356 g/L/h, which is thought to be due to the increase in the concentration of immobilized cells. This study shows the potential to develop an efficient process for ferrous iron oxidation without loss of ferric iron.
Eun-Ho Yu,Myunghoon Moon,Ji-Hong Min,Hye-Kyung Kim,신용일,고현윤,So Jung Kim,고성화 대한연하장애학회 2020 대한연하장애학회지 Vol.10 No.1
Objective: This study examined the correlation between dysarthria and aspiration to determine if dysarthria canpredict aspiration in stroke patients. Methods: The medical records of 176 patients with first stroke, who underwent a videofluoroscopic swallowing study(VFSS) and Urimal test of articulation and phonology (U-TAP) at the same time between January 2012 and December2015 in the authors’ hospital, were reviewed retrospectively. The correlation between the penetration aspirationscale (PAS) score and U-TAP score was analyzed in all patients. The mean PAS score and frequency of each PAS scorein the dysarthria group and non-dysarthria group were compared. In addition, the aspiration was analyzed based onthe severity of dysarthria in the dysphagia group. All statistical analyses were performed using SPSS software. Results: The correlation between the PAS score and U-TAP score was not statistically significant in all the subjects. The mean PAS score was 3.46±5.52 and 3.07±5.49 in the dysphagia and non-dysphagia group, respectively. The meanPAS score of the dysphagia group was higher than that of the non-dysphagia group. On the other hand, it was notstatistically significant. In addition, there was no significant difference in the frequency of the PAS scores betweenthe two groups. The aspiration was compared with the severity of dysarthria according to the U-TAP score; therewas no statistically significant difference. Conclusion: No correlation was observed between dysarthria and aspiration in stroke patients. In addition, there wasno difference in the frequency of aspiration with or without dysarthria. According to the results of this study, aspirationcannot be predicted by dysarthria in stroke patients. Therefore, each diagnostic test and assessment shouldbe performed for each symptom.
화학독립영양세균의 탄소전환 성능 향상을 위한 생물전기화학 반응 최적화 연구
김희수(HuiSu Kim),문명훈(Myunghoon Moon),이지예(Ji Ye Lee),이유림(Yu Rim Lee),이상민(Sangmin Lee),고창현(Chang Hyun Ko),이진석(Jinsuk Lee),이수연(Soo youn Lee) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7
화석연료의 사용량의 급격한 증가는 인간의 삶에 편리를 가져왔지만 이에 온실가스 배출량이 증가함에 따라 지구온난화로 인한 기후변화 등의 피해가 심각해지고 있다. 그에 대응하기 위해 온실가스 배출을 줄이기 위한 노력과 배출된 이산화탄소(CO<SUB>2</SUB>) 활용방안에 대한 관심이 높아지고 있는 추세이고, 발전소 또는 산업체에서 배출되는 이산화탄소를 포집·활용·저장(CCUS)에 대한 연구가 활발히 진행되고 있다. 포집된 이산화탄소는 생촉매(효소, 미생물)를 활용하는 생물전기합성 시스템(Microbial electrosynthesis system)에서 탄소전환(carbon conversion)을 통해 다양한 부가가치 산물로 전환될 수 있으며, 태양광 에너지로 물 분해(water splitting)를 통해 산소(O<SUB>2</SUB>) 및 양성자(H<SUP>+</SUP>)를 생산할 수 있는 애노드(anode, 산화전극)와 CO<SUB>2</SUB>, 양성자(H<SUP>+</SUP>) 및 환원력(전자, e<sup>-</sup>)를 전달하여 생촉매 내 대사전환을 통해 CO<SUB>2</SUB>를 부가가치 산물로 전환시킬 수 있는 캐소드(cathode, 환원전극)로 구성되어 있다. 또한, 애노드 및 캐소드에 쓰이는 전극 물질은 미생물에게 독성이 없고, 경제적으로 효율이 좋은 graphite felt를 사용하였다. 본 연구에서 사용된 화학독립영양세균인 Rhodobacter sphaeroides는 광합성 기작을 통해 에너지를 얻을 수 있으며, 수소와 CO<SUB>2</SUB>를 활용하여 성장할 수 있다. 따라서 R. sphaeroides를 미생물전기합성 시스템에 적용시켜, 캐소드로부터 직접적으로 환원력을 전달받아 CO<SUB>2</SUB>를 부가가치 산물로 전환하도록 설계하였다. 더욱이, R. sphaeroides의 가스상 CO<SUB>2</SUB> 이용 효율을 향상시키기 위해 CO<SUB>2</SUB> 흡수제를 공급함으로써 부가가치 산물의 생산성을 증가시키기 위한 미생물전기합성 시스템 최적화 연구를 진행하였다.
Park, Jaesung,Kwak, Myunghoon,Moon, Kibong,Woo, Jiyong,Lee, Dongwook,Hwang, Hyunsang IEEE 2016 IEEE electron device letters Vol.37 No.12
<P>We propose TiOx-based resistive switching device for neuromorphic synapse applications. This device is capable of 64-levels conductance states because of their optimized interface between the metal electrode and the TiOx film. To compensate the change in switching power with increasing pulse number, we propose the use of fixed voltage and current pulses in potentiation and depression conditions, respectively. By adopting a hybrid pulse scheme, the symmetry of conductance change under both potentiation and depression conditions is shown to be significantly improved. Both the improved conductance levels and the symmetry of conductance change are directly related with enhanced pattern recognition accuracy, which is confirmed by a neural network simulation.</P>