직접메탄을 연료전지용 귀금속 산화극 대체촉매의 개발

최재식,윤봉국,하승백,정원섭,이호인 한국공업화학회 2003 응용화학 Vol.7 No.2

Direct Methanol Fuel Cell (DMFC) is based on the technology of Polymer Electrolyte Membrane Fuel Cell. DMFC has several features of environmentally benign generation of electricity and high mobility for portable electronics etc., but its main problem to overcome for commercialization is the high cost of noble metal catalysts. In this study, it was found that the Pt/C catalyst supported on carbon nano fiber had the highest catalytic activity among the catalysts supported on several carbons. The newly developed Pt/C alternative catalyst had higher catalytic activity for methanol oxidation than the Pt/C catalyst supported on Vulcan XC-72.

신장에 발생한 섬유육종 1례

이재규,손경민,권동득,오봉렬,류수방,박양일,최찬 大韓泌尿器科學會 2001 Korean Journal of Urology Vol.42 No.7

한약제형 선호도에 관한 설문조사

최현정,방나영,송보완,김남재,류봉하 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-

In order to investigate to develop the new dosage form of the traditional herbal medicine which have been used for the treatment of disease in oriental medicine, we conducted a survey on 217 patients who visited oriental hospital in Kyung Hee University Medical Centre during one month since October 2003. They were given questionnaires to answer and results of this study were as the following: 1. About 45% patients visited in oriental hospital believed that oriental medicine was better remedy than modern medicine. 2. Most of patients felt that the oriental medical expenses were expensive. 3. About 60% patients preferred the modernized dosage form such as extract powder and granule, etc. rather than medicinal herbs in package. 4. Most of patients hope that decoction of medicinal herbs in package would change the advanced dosage forms such as tablet, capsule and extract powder, Because patients suffered from inconvenience of making a decoction, unhandy, unwieldy and keeping. 5. About 60% patients pointed out that merits of advanced dosage forms of medicinal herbs were convience to take and handy, etc.. However, they had an Intension that there were some difference of efficacy between decoction and modernized dosage forms of oriental medicine. Because of several defects such as unusual flavor and smell, incompatible food, large volume with amount, inconvenience of carrying and decocting oriental herbal medicines, most of patients would expect the development of the advanced dosage forms of them. In summary, this study show that it was needed to develop the new dosage forms of oriental herbal medicine on the basis of scientific research and economical cost of medical expenses.

소음성난청 유소견자들의 사후관리 실태

최장선,송재석,원종욱,강종두,차봉석,노재훈 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.2

The number of workers with noise induced hearing loss which comprise 56.9% in the total number of workers with work-related diseases in Korea of 1994, are becoming in position of the most serious problem. Periodic health examination system which was introduced for health care of workers on hazardous workplace has played important role in health care and the prevention of work-related diseases. The goal of periodic health examination may be obtained when we not only discover occupational disease, but also control them effectively. To study the post-examination health status of workers with noise induced hearing loss diagnosed from 1991 to 1994 in the periodic health examination, all 154 workers in 102 manufacturing factories in Banwol and Siwha industrial complex were reviewed. 1. Among 154 workers, 87 workers(56.5%) were changed to different department, 67 workers(43.5%) remained in the same department. 2. Among 102 workplaces, only 23 workplaces(22.9%) had changed their working environment while 79 workplaces(77.1%) did not. 3. In this study, post-examination health care of the workers diagnosed as noise induced hearing loss had significant correlated with the presence of health care manager, Industrial Health and Safety Committee in workplace and size of industry. The improvement of working environment is also closely related with the presence of health care manager in workplace. 4. Among 154 respondents, 3 workers(1.9%) had received compensation while 151 workers(98.1%) did not. 5. The reasons for not requesting the compensation were that 117 workers(77.5%) were ignorant of the administrative procedure for compensation, 30 workers(19.9%) were not sure of receiving compensation, 4 workers(2.6%) were busy. Considering the result of this study, we must establish the guide of management or contents of post management for noise induced hearing loss. To prevent the noise induced hearing loss, and protect the workers with noise induced hearing loss, education about post management is much required for employer and employee.

Polytrimethylene terephthalate(PTT) 가연사의 수축거동에 관한 연구

최재우,장봉식 한국의류산업학회 2004 한국의류산업학회지 Vol.6 No.4

Shrinkage properties of drawn textured Poly(trimethylene terephthalate, P1"1') yarn, which has been developed recently, were investigated to provide fundamental information for the textile industry. Shrinkage ratio characteristics on PTT yarn with six different count were investigated with tension, dry and wet thermal temperature. In non-tension, the shrinkage ratio were increased to increasing temperature at dry and wet thermal treatment, and in tension, the shrinkage ratio were increased to increasing tension at dry and wet thermal treatment.

인천 인현동 호프집 화재 피해자 분석

최정태,안무업,안희철,최영미,정재봉,서정열,유기철,이삼우,박석현,조준휘,김성환,김아진,송근정 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4

Purpose : This study was conducted to develop field triage, transportation, distribution, and prehospital care at a fire disaster by analyzing the victims of the fore that broke out at a bar in Incheon. Method : We analyzed the cases of the victims of a fire in Incheon in Oct. 1999. We determined the primary care hospital, the arrival time, the burn size, the outcome, and the injury type from the medical records, the concerned organ records, and interviews with concerned persons. Result : The total number of victims was 137: 56 prehospital deaths, 1 hospital death, and 80 survivals. The Pearson correlation coefficient between the burn size and the severity was -0.175. There were 121(89.6%) cases of inhalation injury, 59 (43.7%) cases of flame burns, 66 (48.9%) cases of hypoxic brain damage, and 16 (11.9%) cases involving other types of injury. Conclusion : The causes of death of the fire victims were inhalation injury and hypoxic brain damage due to CO poisoning and other toxic inhalants. We propose the use of a simple triage and rapid treatment(START) system and a reassessment the delayed category in fire disasters.

스포츠 경기에서 집중력을 높이기 위한 전략

최재원,김재훈,박봉섭 중앙대학교 스포츠과학연구소 2002 體育硏究 Vol.- No.16

This study is to take a general look at "tention"for which the types of attention behavior and the relevant theories has been studied to lay out a scheme for attention development. In fact, the theories on attention behavior have not only been well organized in the field of sports, but it also lacked empirical studies, which means the theory itself has been revised by trials and errors in the actual competition field rather than to be systematically developed in the sphere of logic and theory. Especially, the applicative studies on the adjustment of attention has only been set forth recently, which means more applicative studies are required to better understand the attention development procedures of athletes. The follow-up studies will require a strategy based on the quality of the study, which may be able to achieved through a good combination of single-testee method and case study. Through all this, we should be able to provide an attention improvement training method to each of the athletes in need based on the theories and methodologies mentioned above, for which profound studies in this Held will be required.

20km와 150km의 도로싸이클 주행이 혈중 렙틴, 지질과 호르몬 수준에 미치는 영향

최용어,권봉안,오재근,김범수,조준용,김문희 한국체육대학교 체육과학연구소 2000 韓國體育大學校附屬 體育科學硏究所論文集 Vol.19 No.1

Serum leptin, glucose, lipid profiles (free fatty acid, triglyceride, total cholesterol) were determined in two groups of subjects undergoing long and short strenous cycle race, 8 men who fasted overnight and then pedaled 20km cycle race and 8 men, 150km cycle race, respectively, Blood samples were collected before race, immediately after cessation of race and 2hr, 6hr after the end of race period. Cyclist pedaling 20km cycle race and cyclist pedaling 150km cycle race showed no statistical differences in leptin level. After 6hr of rest, leptin concentrations were gradually decreased but showed no statistical different in both groups. Epinephrine (p〈.01) and norepinephrine (p〈.001) concentration in comparison to pre-race levels were increased significantly. But insulin concentration in comparison to pre-race levels were decreased significantly (p〈.001). Glucose (p〈.01), free fatty acid (p〈.001), cholesterol (p〈.001) and triglyceride (p〈.01) were increased immediately after cessation of race in both groups.

Isoproterenol이 마우스 심근조직에 미치는 영향

최재화,김호덕,심태섭,라봉진 중앙대학교 의과대학 의과학연구소 1985 中央醫大誌 Vol.10 No.1

For the study, forty-six normal adult ICR mice were sacrificed. Extraction of the hearts was performed under ether anesthesia after two consecutive subcutaneous injections of isoproterenol hydrochloride (1-/3', 4'-dihydroxyphenyl/-2-isopropylaminoethanol HCI). The administered doses of isoproterenol to each group of the mice were 20mg, 35mg, 50mg, 80mg, 100mg, 150mg, and 200mg per kilogram of body weight respectively, After extraction, the wet weight of each of the hearts was measured. Five μm-thick paraffin sections of the heart tissue fixed with alcohol-formalin were stained with hematoxylin and eosin for routine study, with van Gieson's method for collagen, and with von Kossa's method for histochemical study of calcium salt. Stained sections were examined under light microscope. The results were as follows: 1. All of the mice treated with isoproterenol showed myocardial necrosis-like lesions. These lesions spread from subendocardial area to entire myocardium in accordance with the increase of dose of isoproterenol and the prevalence rate of myocardial necrosis by isoproterenol administration was higher in the left ventricle than in the right ventricle. 2. The most typical histopathologic findings of myocardial necrosis were observed in the mice treated with 80mg of isoproterenol per kilogram of body weight. 3. The mice treated with 100mg, 150mg, and 200mg of isoproterenol per kilogram of body weight showed the death rate of 50%, 83%, and 100% respectively after the first administration. 4. All of the mice treated with isoproterenol showed calcium deposits in the myocardium. 5. The ratio of the wet weight of heart to the body weight increased in the mice treated with isoproterenol in comparison with the control mice.

생쥐에 있어서 單一害球가 分離된 受精卵의 移植에 의한 새끼生産에 관한 硏究

崔有林,全益秀,金宣宜,崔光洙,朴修奉,辛明宰 慶北大學校農業科學技術硏究所 1991 慶北大農學誌 Vol.9 No.-

本 연구는 생쥐의 4細胞期胚에서 하나의 割球를 뽑아내는 새로운 割球分離技術인 biopsy에 대한 효율성과 分離된 受精卵과 分離한 割球의 생존성 및 새끼생산율을 검토한 結果이다. 그 結果를 要約하면 다음과 같다. 1. 4細胞期胚에서 分離한 單一割球와 4細胞期胚를 M2 배양액에 배양한 結果, 單一割球는 82.6%가 영양배엽을 형성한 割球로 發生하였고 4細胞期胚로 89.5%가 胚盤胞期胚로 發生하였다. 2. 4細胞期胚를 biopsy하여 하나의 割球가 分離된 受精卵과 대조구인 4細胞期胚를 M2배양액에서 배양한 결과 각각 83.3%와 90.4%가 胚盤細胞胚로 發生하였다. 3. Biopsy하여 4細胞期胚에서 分離한 單一割球와 대조구인 4細胞期胚에서 4개의 割球로 분리한 單一割球를 M2 배양액에서 배양한 결과 각각 80.8%와 83.3%가 영양배엽을 형성한 割球로 發生하였다. 4. 4細胞期胚에서 하나의 割球를 뽑아낸 受精卵과 대조구인 4細胞期胚를 수란생쥐에 이식한 결과 각각 36.0%와 48.6%의 새끼쥐 생산率을 얻었다. The study was carried out to investigate the viability and the offspring production rate of single blastomeres and biopsied 4-cell mouse embryos and, also to examine the efficiency of biopsy. The results obtained are summerised as follows : 1. The separated blastomeres from 4-cell embryos and intact 4-cell embryos which were cultured in Medium 2 were developed to trophoblastic vesicle and blastocyst embryo by 82.6% and 89.5%, respectively. 2. The biopsied embryos from 4-cell embryos and intact 4-cell embryos which cultured in Medium 2 were developed to blastocyst embryo by 83.3% and 90.4%, respectively. 3. The biospied blastomeres and the separated blastomeres from 4-cell embryos which were cultured in Medium 2 were developed to trophoblastic vesicle by 80.8% and 83.3%, respectively. 4. The biopsied embryos from 4-cell embryos and intact 4-cell embryos were transferred to recipients, and the offspring rate was 36% and 48.6%, respectively.