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고령의 호흡기 질환 환자에서 상부 위장관 내시경 검사시 폐기능 장애 정도에 따른 산소 포화도의 변화
정윤형(Yun Hung Jung),이진석(Jin Suk Lee),한종학(Jong Hak Han),김재홍(Jae Hong Kim),정동성(Dong Sung Jung),이귀래(Gwi Lae Lee),한창완(Chang Wan Han),박운식(Woon Sik Park),조영삼(Young Sam Cho),주홍돈(Hong Don Joo),두창준(Chang Joon D 대한내과학회 1995 대한내과학회지 Vol.49 No.2
Objectives : We performed following experiment in order to find the relationship between impairment of pulmonary function test (PFT) and oxygen desaturation during upper gastrointestinal endoscopy examination among the elderly patients. Methods : Pulmonary function test and ABGA (arterial blood gas analysis) were performed before endoscopy. Arterial oxygen saturation and pulse rate were monitored with pulse oximeter before endoscopy until 5minutes its completion. We classified the population by control group and patients group by pulmonary function test. we classified patients group by mild group, moderate group and severe group (Table 2). Results : 1) Oxygen saturation was decreased significantly among all of groups, the most decreased within 1 minutes after insertion endoscopy and recovered soon before endoscopic completion. 2) The duration of worst SaO2 did not correlated with the pulmonary function test impairment. 3) The time of endoscopy did not correlated with decrease in SaO2 during endoscopy 4) There is decreased oxygen saturation in mild group, but no significant change from control group. 6) Pulse rate did not correlated with pulonary function test impairment. Conclualon : Oxygen saturation was decreased all groups in elderly populaton during upper gastro-intestinal endoscopy especially moderate or severe groups, therefore, incidence of cardio-pulmonary disease is increased. To prevent cardio-pulmonary complication, we should detect oxygen desaturation early by using pulse oximeter during upper gastrointestinal endoscopic procedure in moderate or severe group. If needed, termination of the procedure, oxygen supplement or assisted ventilation minimize cardiopulmonary complication.
연구논문 : 활성슬러지 반응탱크의 풍량제어지표인 NADH에 관한 연구
정우진 ( Woo Jin Chung ),홍성민 ( Sung Min Hong ),김한래 ( Han Lae Kim ),장순웅 ( Soon Woong Chang ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.3
Domestic sewerage treatment plant is operated by activated sludge method and its modified method by using microorganism. In most cases, a method of using microorganism is directly controlled by the operator based on individual judgment through factors of DO, pH and ORP. In addition, under aerobic condition in bioreactor, energy consumption including excessive air injection is learned to be somewhat plenty. In order to solve this problem, in most of the process, improvement of internal recycling and activated environmental factor of microorganism were researched extensively. However, as factors are changed depending on various conditions, it is not sufficient as an indicator of judgment. As such, a research on operation of bioreactor that measures metabolic change in short time by directly measuring activated condition of microorganism using NADH fluorometer is required in reality.It is considered that the method like this could supplement problem of energy consumption being occurred in the existing treatment method and operational optimization of bioreactor would be enabled by controlling optimal air volume. Therefore, in this study, in order to obtain optimal operational indicator of bioreactor, proper air volume control test was performed and through batch test and site evaluation, possibility of NADH sensor being utilized as operational control indicator of bioreactor is intended to be analyzed. In order to compare with measured value, DO, ORP that are operational control indicator of existing bioreactor were used. As MLSS concentration was increased through batch test, NADH value was increased and site evaluation also showed similar tendency to batch test. Resultantly, it could be confirmed that changing level of NADH fluorometer was a sensor that could measure bioreactor condition effectively and optimized scale of bioreactor is considered to be utilized.
Hong, Young-Seoub,Kang, Ho-Jin,Kwak, Jong-Young,Park, Byung-Lae,You, Chang-Hun,Kim, Yu-Mi,Kim, Heon The Korean Society for Preventive Medicine 2011 Journal of Preventive Medicine and Public Health Vol.44 No.3
Objectives: The microRNA (miRNA) miR-196a2 may play an important role in lung cancer development and survival by altering binding activity of target mRNA. In this study, we evaluated their associations with the susceptibility of non-small cell lung cancers (NSCLC) by case-control study in a Korean population. Methods: We performed genotyping analyses for miR-196a2 rs11614913 T/C at miRNA regions in a case-control study using blood samples of 406 NSCLC patient and 428 cancer-free control groups. Results: The total C allele frequencies for miR-196a2 were 48.8% for the patients and 45.6% for the controls; and the genotype frequencies of TT, TC, and CC were 23.7%, 55.2%, and 21.1% for the patients and 31.1%, 46.35%, and 22.4% for the controls (p<0.05). Participants who possesses TC/CC genotypes showed high risk for NSCLC compared to those possessed TT genotypes (OR, 1.42; 95% CI, 1.03 to 1.96). The association was persisted in 60 and older age group, male, smokers, those without family history for cancer. However, no significant association of CC genotypes in recessive genetic model was observed. Conclusions: In conclusion, this case-control study provides evidence that miR-196a2 rs11614913 C/T polymorphisms are associated with a significantly increased risk of NSCLC in a dominant model, indicating that common genetic polymorphisms in miR-196a2 rs11614913 are associated with NSCLC. The association of miR196a2 rs11614913 polymorphisms and NSCLC risk require confirmation through additional larger studies.
An ab initio Study on the Molecular Elimination Reactions of Methacrylonitrile
Oh, Chang-Young,Park, Tae-Jun,Kim, Hong-Lae Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.8
Ab initio quantum chemical molecular orbital calculations have been performed for the unimolecular decomposition of methacrylonitrile ($CH_3C(CN)=CH_2$), especially for HCN and $H_2$ molecular elimination channels. Structures and energies of the reactants, products, and relevant species along the individual reaction pathways were determined by MP2 gradient optimization and MP4 single point energy calculations. Direct four-center elimination of HCN and three-center elimination of H2 channels were identified. In addition, H or CN migration followed by HCN or H2 elimination channels via the methylcyanoethylidene intermediate was also identified. Unlike the case of crotonitrile previously studied, in which the dominant decomposition process was the direct three-center elimination of HCN, the most important reaction pathway should be the direct threecenter elimination of $H_2$ in the case of methacrylonitrile.