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- 저자 : Lee Joung-Seok (검색결과 445 건)
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원자흡수 및 발광분광법에 의한 칼슘분석시 방해이온에 대한 란탄의 해방효과에 관한 연구
정창웅,이석기 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.2
The optimal conditions of Calcium analysis have been investigated. Interference effects are shown to be serious in large amounts of Al³+, Zr⁴+, 3O₄²- and SiO₃²- sample solution. These effects are eliminated by use of La(Ⅲ), N₂O-C₂H₂ flame and AES
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응급실 급성심근경색증 환자의 체류시간에 영향을 미치는 요인에 관한 연구
정혜경,김해준,윤석준,이준영,이희영 한국의료QA학회 2003 한국의료질향상학회지 Vol.10 No.1
Background : The purpose of this study is to investigate the influencing factors on the length of emergency department stay of patients with acute myocardial infraction. Methods : we reviewed medical records of all patients who were Hospitalized with acute myocardial infraction from March 1, 2002 to February 28, 2003. Results : The average length of stay in the emergency room of the subjects was 182.74 minutes. After the emergency room treatment, 48.1% of the subjects were transferred to intensive care unit. The hospitalization through emergency room mostly took place in the office hours. There were more patients on Monday. The influencing factors on the length of stay in the emergency room of patients with acute myocardial infraction were emergency room arrival time which was classified in seasons, treatment hours of specialized doctors, medical care insurance and required time of radiologic examination. Conclusion : In order to reduce the length of emergency room stay, it might be an available solution secure enough spaces, facility, and staff of the radiologic test only for the patients of the emergency room. And the effective use of emergency facility and space, establishment of standardized treatment guideline, and provision of emergency treatment support system are also needed.
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도로공사 우수배제시설의 시공성 및 성능 개선에 관한 연구
강인석,박서영,곽중민,이우식,정수언 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-
Generally, a street-inlet in road facility is aimed to exclude rainfall and filth from sewer system. In order to solve some problems in current street inlet facilities, some revised inlet systems have been suggested. Those revised facilities can also solve an environmental problem like a bad smell emitting from the worn facility and solve civil petitions due to its safety and poor quality of passing rainfall. In this study, the existing rainfall exclusion facility was investigated including foreign countries and a developed street inlet model was represented through estimating of their structures, characteristics and costs. It also be analyzed that the existing problems can be solved by a trial construction and the developed model was compared with existing models by focusing on constructability and maintenance capacity.
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중질유 탈황공정 폐촉매로부터 유가금속의 회수에 관한 연구
조정우,이정희,구덕모,김기석 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.1
In order to selectively recover by the extractive separation the value metals including V, Mo, Ni, Co, and Al from the spent catalysts removed from the resid desulfurization processes, we investigated the following: how to efficiently remove the nonmetallic impurities from the spent catalyst by roasting how to optimize the pore structure of roasted spent catalyst, how to select the suitable leachants and extractants, how to optimize the conditions of leaching/extraction, and how to determine the effective sequence of selectively recovering the value metals. With regard to roasting of spent catalyst, 550℃ was found to be the optimal roasting temperature in terms of sulfur removal and solubility of roasted catalyst in the sulfuric acid leaching solution as the specific surface area, porosity, and residual sulfur content were measured for the spent catalysts roasted at various temperatures in the tubular furnace. For the spent catalysts roasted at temperatures above 650℃, the efficiency of selectively recovering the value metals was diminished due to the decreased surface area and porosity, thereby the lowered solubility of roasted catalyst in the sulfuric acid leaching solution. In the case of roasting at 550℃, the ratio of (oxygen flow rate)/(volume of spent catalyst sample) equal to 30min?? was optimal for the efficient removal of sulfur from the spent catalyst. With regard to the selective recovery of value metals by leaching/extraction operations, two spent catalysts of different metal compositions as well as two model oxide mixtures simulating the metal compositions of those catalysts were experimented to determine the suited leachants/extractants and search for the effective sequences of selective recovery. The sequential recovery operation consisting of the solid-liquid separation via leaching and the liquid-liquid separation via extraction made it possible to selectively recover the value metals from both the model oxide mixtures and the spent catalysts. The differences in particle structure and component distribution between the model oxide mixture and the spent catalyst accounted for the differences in leaching, leaching conditions, and recovery sequences between the two. The sequences of selectively recovering the value metals which are relatively simple and of good potential to be applied in commercial scale were developed for the spent catalyst of two different metal compositions
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소화성 궤양에서 삼제 병합 요법의 저용량에 의한 Helicobacter pylori 제균률과 궤양 치유효과
김예리,박봉안,이재동,이종혁,김인숙,박형석,진춘조,김상윤,박의우 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-
Helicobacter pylori is the major cause of histologic chronic gastritis and is strongly associated with peptic ulcer disease, gastric cancer and lymphoma. Several recommendations for the management of the Helicobacter pylori infection have been developed. However, there has been no clear therapeutic regimen for the optimal treatment of Helicobacter pylori infection. This study was desinged to evaluate the eradication rate and the ulcer healing rate of the triple regimen with low-dose clarithromycin(0.5g/day) in peptic ulcer patients. Forty three patients with gastric ulcer(n=15) and duodenal ulcer(n=28) were enrolled. The patients were treated either with omeprazole 20mg b.i.d. amoxicillin 0.5g b.i.d. and clarithromycin 250mg b.i.d. (low-dose regimen group, n=29) or with omeprazole 20mg b.i.d., amoxicillin 1.0g b.i.d. and clarithromycin 0.5g b.i.d.(high-dose regimen group, n= 14) for 2 weeks. After 4 weeks, the patients were evaluated for the eradication of Helicobacter pylori and the healing of ulcer. And gastritis scores according to the Sydney system were evaluated before and after 4 weeks from the end of the triple regimen. There was no significant difference in the eradication rate and the ulcer healing rate between the low-dose regimen group, group and the high-does regimen group. In the low-does regimen group, the mean initial scores of chronic inflammation and activity were decreased after the eradication of Helicobacter pylori. In conclusion, the low-dose triple regimen is as effective as the high-dose triple regimen on the eradication of Helicobacter pylori and the ulcer healing rate in peptic ulcer disease.
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한재숙,김정애,한경필,김동석,소기신행,이갑랑 한국조리과학회 2004 한국식품조리과학회지 Vol.20 No.6
The purpose of this study was to investigate the quality characteristics of functional cookies made with potato peels (cortex layer) containing high amounts of glycoalkaloid. Cookies were processed by mixing ratios of 10, 15 and 20% potato peel relatively to flour. The spread ratio of the cookies was increased with increasing potato peel addition. Texture measurement for the cookies on substituting 10% of flour for potato peel showed a decreased hardness, but the cohesiveness and springiness were increased compared to the control and other ratios. The glycoalkaloid contents of the cookies on substituting 10, 15 and 20% of the flour forpotato peel were 6.27, 9.40 and 12.54mg, respectively, which according to the USAD guidelines are safe amounts for the human body, and also enough for making functional cookies. In the sensory evaluations, the cookies with 10% of the flour substituted for potato peel had the highest scores in flavor, taste, appearance and texture.
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이강숙,이정운,이원철,맹광호,양선임,김대석,이선영,이경화 가톨릭대학산업의학센타 산업의학연구소 2003 韓國의 産業醫學 Vol.42 No.2
This study was carried out to find the factors associated with relapse of smoking in mail workers. The data were obtained from 513 workers of an electronics industries in October 2002 about nicotine dependence, withdrawal symptom, and knowledge for smoking. The results of this study can be summarized as follows; 1. Amount and duration of smoking, irregular eating and non-exercise were higher in re-smokers. 2. The rate of high nicotine dependency and craving for smoking was increased in re-smoker. 3. Mean of quitting trial was 2.39 in ex-smokers and 2.17 in re-smokers, the duration of first quitting were 10.43 days in ex-smokers and 3.73 days in re-smokers. 4. The top reason for re-smoking was 'job-stress' in ex-smokers and re-smokers. 5. The mean score of knowledge about smoking was 7.88 in ex-smokers and 7.83 in re-smokers. 6. The more nicotine dependency increased, the more withdrawal symptom becomes. And increased withdrawal symptoms are correlated with frequency of quitting trial positively. In conclusion, it was suggested that factors of re-smoking were job-stress and nicotine dependency. Therefore comprehensive smoking cessation program including stress management and nicotine replace therapy was needed.
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Lee, Yun-Gyoo,Lee, Ju Hyun,Kim, Se-Hyun,Kim, Yu Jung,Lee, Heeyoung,Ahn, Soyeon,Jang, Joung-Soon,Lee, Jong-Seok,Kim, Jee Hyun Elsevier 2018 Lung cancer Vol.122 No.-
<P><B>Abstract</B></P> <P><B>Introduction</B></P> <P>To determine whether an upfront combination compared to single-agent therapy is beneficial for elderly patients with advanced non-small cell lung cancer (NSCLC) in the real world, a population-based epidemiologic study was conducted.</P> <P><B>Methods</B></P> <P>Patients ≥70 years with advanced NSCLC from 2007 to 2012 were identified in the National Health Insurance Service Database of Korea. A Cox proportional-hazards regression model and propensity score analysis were used to examine the effect of treatment modality on survival.</P> <P><B>Results</B></P> <P>Among 41,276 patients newly diagnosed with lung cancer, 8274 (20.0%) identified to be treated with upfront palliative chemotherapy were eligible for this study. After excluding 976 patients who received a first-line anti-epidermal growth factor receptor (EGFR) treatment, 7298 (88.2%) who received cytotoxic chemotherapy were included in further analyses: 5636 (77.2%) received doublet chemotherapy and 1662 (22.8%) received monotherapy. The most frequent regimen in combination group was gemcitabine and platinum doublet (44.7%), whereas that in monotherapy group was gemcitabine (46.7%). Multivariate analyses indicated lower use of combination chemotherapy with increasing age (odds ratio [OR] 0.73; 95% CI 0.67–0.79; <I>P</I> < 0.001) and female sex (OR 0.71; 95% CI 0.62–0.80; <I>P</I> < 0.001). Receipt of combination over single-agent chemotherapy was associated with a reduced risk of death (hazard ratio [HR] 0.91; 95% CI 0.86–0.96; <I>P</I> = 0.001) in overall population and (HR 0.89; 95% CI 0.80–0.98; <I>P</I> = 0.019) in the propensity-matched cohort.</P> <P><B>Conclusion</B></P> <P>In elderly patients with advanced NSCLC excluding those receiving frontline anti-EGFR targeted agents, receiving initial combination chemotherapy compared to single-agent was associated with improved survival.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This population-based study included all patients ≥70 years of advanced NSCLC. </LI> <LI> We examined if an upfront combination compared to singlet therapy is beneficial. </LI> <LI> Combination over singlet chemotherapy was associated with a reduced risk of death. </LI> <LI> Our results were consistent between overall and propensity score-matched cohort. </LI> </UL> </P>
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