한국 인조흑연 응용산업의 기술경쟁력 향상방안 연구

최재두,유승곤,김홍건,곽이구 충북대학교 국가미래기술경영연구소 2020 기술경영 Vol.5 No.4

Korea's artificial graphite market is close to 1 trillion won a year, but it is imported all of its domestic demand from China and Japan due to the lack of technology for manufacturing artificial graphite. According to the Korean Ministry of Trade, Industry and Energy's planning report, 'Project for Development of Carbon Materials Convergence Technology', in November 2019, Korea’s technology level is only 37% when the technology level of Japan, which is the world's best technology level regarding as 100%. Thus, it is estimated that there is a 20-year technology gap. In order to secure technology for artificial graphite manufacturing and related applications, private and government-invested research institutes and universities have carried out related research steadily, and the government has continuously promoted national R&D projects for more than 10 years, but so far, Korea has not secured core technologies for related fields. Present study analyzes the major technological trends, progress and the performance of national R&D projects for the development of major technologies in Korea's artificial graphite application industry. Further, it is identified the fundamental causes and problems of major technologies that fall short of the level of advanced countries. Finally it is suggested that the ways to improve technological competitiveness are as follows; 1) Expansion of independent technology development capability for source technology. 2) Improving the management system of national R&D projects. 3) Establishment of the institutional support system at the government level.

1985년 한국 각지에서 분리한 이질균속의 특성에 관한 연구

최재두,이연태,정태화,Choi, Jae-Doo,Lee, Yun-Tai,Jung, Tae-Hwoa 대한미생물학회 1987 大韓微生物學會誌 Vol.22 No.1

The result of various researches mainly in search of 194 Shigella strains, isolated by the Health Research Centers(situated in Seoul city, Inchon city, Pusan city, Kyonggi-Do, Kangwon-Do, Chungchongnam and Buk-Do, Kyongsangnam and Buk-Do, Jollanam and Buk-Do, and Jaeju-Do) in addition to those clinical laboratories of all the general hospitals situated down twon Seoul, conducted during the month of Jan. through Dec. 85, through the reisolating-activity program following its transportation into the laboratory, particularly for a complete check on its correctiveness, are as follows: 1. Isolation processes were performed with the 194 strains obtained from each placeduring the period of investigation: 164 Strains(84.5%) of Sh. flexneri, B group; 6 Strains(3.1%) of Sh. boydii, C group; 24 Strains(12.3%) of Sh. sonnei, D group, which means there's quite a lot in B group while Sh. dysenteriae, A group was not isolated at all. 2. The isolation rate of the 164, B group for subserotype was 1b, 84(51.2%) the highest one, 2(1.2%) on 3a the lowest one, 4, on C group; In D group subserotype II showed 14(58.4%) more than subserotype I. 3. The biological data on sexuality regarding the isolation-strain showed traditional particularity. But the subserotype 1b in B group 2(2.4%) showed gas-growth from glucose. In subserotype 1a, the indole-growth was 88.9% on masculine which was considerably a good one. In the test of arginine dihydrolase subserotype I among D group showed 100% masculine rate. The subserotype 6 among B group showed 92.5% masculine. In the dissolution test of manitol, all subserotypes showed 100% maculine except subserotype 1b. In the dissolutioning test of rhamnose, the subserotype I among D group showed 100% masculine which is the unusual one. 4. Interms of the area among 13 districts examined, Kangwon-Do had 41(21.1%) which is the highest one on its ratio. 5. In terms of season on the strain isolation category, 44(22.7%) is the number isolated in April which is the highest one. 6. In terms of ages, the strain isolation ratio was notably high above the ages of 60 which was 34(17.5%). Next one was 29(14.9%) which was under the ages of 4. 7. In terms of sex, female was 113 or 58.2% while male was 74 or 38.2%, which means the female had more than the male. 8. The result of the resisting capability on the usage of 12 antibiotic medication was; 100% on chloramphenicol; 94.3% on tetracycline, 82.0% on streptomycin, 76.3% on carbenicillin, 74.7% on ampicillin, in regular order. The strain source bearing multimedication resisivity against the 5 antibiotic medication is as many as 117 or 60.3%. Of which 43.3% of 1b sub serotype, B group was the best one, and thus the resistivity against the antistrain medication seems the tendency is being changed. The summing up of the above result shows the total specific strains isolated in each branch in Korea is 194, of which the main type is Sh. flexneri 84.5%. The isolating rate is almost evenly spreading, although the Kangwon-Do showed the highest rate on the above data. It also shows female is higher than male on its statistics. The tendency on age category showed both on old and infancy generations high. However, the resistant capability against antibacteria medication or vaccine was still remaining on habitual one, particularly tending towards multimedication or vaccine trend.

한국의 흑연 생산 및 수출입 역사

최재두(Choi, Jae-Doo),유승곤(Ryu, Seung-Kon) 한국산업경제학회 2020 산업경제연구 Vol.33 No.1

흑연은 탄소섬유, 활성탄소, 탄소나노튜브, 그래핀, 카본블랙 등 탄소소재 중에서 가장 활용도가 높은 중요한 탄소재료이다. 현재 국내에서 필요한 흑연 수요물량의 거의 전량을 중국, 독일, 일본 등으로부터 고가에 수입하고 있으므로 본 연구는 우리나라 흑연의 자체 채광과 응용산업의 원가경쟁력을 향상시킬 수 있는 방안을 제시함을 목적으로 수행하였다. 우리나라는 1945년 이전에는 한 때 세계에서 생산 및 수출량이 가장 많은 나라였으나 근래에는 거의 생산이 되지 않고 있으므로 그동안 천연흑연의 생산 및 수출 역사와 천연흑연의 생산이 중단된 원인을 분석함과 동시에, 국내 천연흑연의 재생산 및 수요가 꾸준히 증가하는 인조흑연의 국내 개발에 대한 중요성을 강조하고자 하였다. 천연흑연의 생산 및 수출 역사는 1945년 이전, 1946년부터 1965년까지, 그리고 1966년부터 2011년까지 시대적으로 구분하여 자료를 정리하였고, 흑연의 수입역사는 2000년 이전과 2000년 이후로 구분하여 분석하였다. 이러한 분석을 통하여 매년 수입단가가 계속 인상됨에 따라 우리나라 흑연 응용산업의 원가경쟁력이 점점 더 떨어지고 있음을 알았다. 그리하여 천연흑연 확보를 위한 자체 광산개발 및 인조흑연 생산을 위한 원천제조기술의 개발이 매우 시급한 과제임을 인식하고 이를 위해 정부 및 관련기관의 지속적인 지원을 통해 흑연 응용산업의 원가경쟁력을 향상시키는 것이 매우 중요하다고 하는 점을 강조하였다. Graphite is the most highly utilized carbon material among carbon materials such as carbon fiber, activated carbon, carbon nanotubes, graphene and carbon black. Since almost all of the required amount of graphite demand in Korea is imported at high prices from China, Germany, Japan and others, this research was conducted with the aim of suggesting ways to redevelopment of domestic natural graphite mines and improve the cost competitiveness of graphite application industries in Korea. Korea was one of the largest producers and exporters in the world before 1945, but in recent years, it has hardly been produced. As a result, we analyzes the history of the production and export volume of natural graphite and the reason why natural graphite production was suspended, and to emphasize the importance of re-mining of domestic natural graphite and development of artificial graphite, which has steadily increased in domestic demand. The history of production and export of natural graphite was divided into periods prior to 1945, from 1946 to 1965, and from 1966 to 2011. The history of graphite imports was analyzed separately before 2000 and after 2000. Through this analysis, we found that the cost competitiveness of the graphite application industry in Korea is decreasing as import unit prices continue to rise every year. Therefore, it was recognized that the development of its own mine development for securing natural graphite and the development of source manufacturing technology for producing artificial graphite are very urgent task. For this purpose, it was emphasized that it is very important to improve the cost competitiveness of the graphite application industry through continuous support from the government and related institutions.

韓國에서 分離된 Salmonella 菌屬에 關하여 : 1983

정태화,최재두,이명원,윤승기 대한임상병리사협회 1984 임상병리사회지 Vol.16 No.1

급속 열처리시킨 n-GaAs에서 Photoreflectance 연구

김인수,배인호,최재두,김근형 嶺南大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.17 No.-

The characteristics of rapid thermal annealed n-GaAs(100) is analyzed by the photoreflectance(PR) measurement. The Si highly doped n-GaAs was observed the FKO signals. The bandgap(E?) and surface electric field(E?) of as-grown sample were 1.423 eV and 2.65×10? V/cm, respectively. In the rapid thermal annealed samples, E? was increased and then decreased by increasing anealing temperature, and it was increased again at 800 ℃. These results could be explained by decreasing of the non-radiative recombination on samples. For the time dependence of the rapid thermal annealing, the amplitude of the PR signal was maximum at 20 sec, and E? was increased by 10.7 times than that of as-grown sample.

1985년 한국 각지에서 분리한 이질균속의 특성에 관한 연구

이연태,정태화,최재두 대한미생물학회 1987 大韓微生物學會誌 Vol.22 No.1

The result of various researches mainly in search of 194 Shigelkr strains, isolated by the Health Research Centers(situated in Seoul city, Inchon city, Pusan city, Kyonggi-Do, Kangwon-Do, Chungchongnam and Buk-Do, Kyongsangnam and Buk-Do, Jollanam and Buk-Do, and Jaeju-Do) in addition to those clinical laboratories of all the general hospitals situated down town Seoul, conducted during the month of Jan. through Dec. 85, through the reisolating-activity program following its transportation into the laboratory, particularly for a complete check on its correctiveness, are as follows: 1. Isolation processes were performed with the 194 strains obtained from each placeduring the pe- riod of investigation: 164 Strains(84.5%) of Sh. Flexneri, B group; 6 Strains(3.1%) of Sh. Boydii, C group; 24 Strains(12.3%) of 5h. Sonnei, D group, which means theres quite a lot in B group while Sh. dysenteriae, A group was not isolated at all. 2. The isolation rate of the l64, B group for subserotype was 1b, 84(51.2%) the highest one, 2 (1.2%) on 3a the lowest one, 4, on C group; In D group subserotype II showed 14(58.4%) more than subserotype I . 3. The biological data on sexuality regarding the isolation-strain showed traditional particularity. But the subserotype 1b in B group 2(2.4%) showed gas-growth from glucose. Tn subserotype la, the indole-growth was 88.9% on masculine which was considerably a good one. In the test of arginine dihydrolase subserotype I among D group showed 100% masculine rate. The subserotype 6 among B group showed 92.5% masculine. In the dissolution test of manitol, all subserotypes showed 100% maculine except subserotype lb. In the dissolutioning test of rhamnose, the subserotype I among D group showed 100% masculine whieh is the unusual one. 4. Interms of the area among 13 districts examined, Kangwon-Do had 41(21.1%) which is the highest one on its ratio. 5. In terms of season on the strain isolation category, 44(22.7%) is the number isolated in April which is the highest one. 6. In terms of ages, the strain isolation ratio was notably high above the ages of 60 which was 34 (17.5%). Next one was 29(14.9%) which was under the ages of 4. 7. In terms of sex, female was 113 or 58.2% while male was 74 or 38.2%, which means the fe- male had more than the male. 8. The result of the resisting capability on the usage of 12 antibiotic rnedication was;100% on chloramphenicol; 94.3% on tetracycline, 82.0% on streptomycin, 76.3% on carbenicillin, 74.7% on ampicillin, in regutar order. The strain source bearing multimedication resisivity against the 5 antibiotic medication is as many as 117 or 60.3%. Of which 43.3% of 1b subserotype, B group was the best one, and thus the resistivity against the antistrain medication seems the tendency is being changed. The summing up of the above result shows the total specific strains isolated in each branch in Korea is 194, of which the main type is Sh. Flexneri 84.5%. The isolating rate is almost evenly spreading, although the Kangwon-Do showed the highest rate on the above data. It also shows female is higher than male on its statistics. The tendency on age category showed both on old and infancygenerations high. However, the resistant capability against antibacteria medication or vaccine was still remaining on habitual one, particularly tending towards multimedication or vaccine trend.

한국(韓國)에서 분리(分離)된 Salmonella 균속(菌屬)에 관(關)하여 (1983)

정태화 ( T. H. Chung ),최재두 ( J. D. Choi ),이명원 ( M. W. Lee ),윤승기 ( S. K. Yun ) 대한임상검사과학회 1984 대한임상검사과학회지(KJCLS) Vol.16 No.1

The authors identified one thousand and fifty-three cultures collected from various parts of the country during the period of January to December, 1983 in Korea. Salmonella were isolated throughout the year. Of those cultures, 85 cultures of A group, 74 cultures of B group, 14 cultures of C group, 760 cultures of Salmonella typhi, 112 cultures of Semonella D group, 8 cultures of E group were identified. Concerning Samonella occurence on Sex and age, it showed for female in relatively higher than in case of male and 25-29 age group were shown the most highest group. In the seasonal distri-bution of Salmonella culture it showed that April was the most highest incidence by month. Antibiotic susceptibility were performed by means of Bauer-kirby disc diffusion method using 10 kinds of antibiotics such as Cephalothin, Chloramphenicol, Coilistin, Gentamicin, Kanamycin, Nalidixic acid, Neomycin, Polymyxin-B, Streptomycin and Tetracyline, the sensitivity pattern to antibiotics of Salmonella cultures were summarized.

한국에서 분리된 Salmonella 균속에 관한 연구

정태화,윤승기,이복권,최재두,이명원,Chung, T.H.,Yun, S.K.,Lee, B.K.,Choi, J.D.,Lee, M.W. The Korea Society for Microbiology 1983 大韓微生物學會誌 Vol.18 No.1

1982년도 1월부터 12월 1년간 서울을 비롯한 전국 보건연구소, 검역소, 서울 시내 종합병원 임상병리실험실에서 수거한 가검물 및 분리한 세균 등 총 1,518건을 시험한 결과 이중 살모넬라균속이 687건이 동정되었다. 이중 441건이 장티푸스였으며 그외 살모넬라균이 246건이었다. 이에 대한 생화학적 특성, 혈청학적 특성, 지리적, 계절적, 성별에 대한 발생특성, 앰피실린 등 12가지 항생제에 대한 감수성 시험을 하였다.

Study on the Genus Salmonella Cultures Isolated in Korea 1982

T.H. Chung(정태화),S.K. Yun(윤승기),B.K. Lee(이복권),J.D. Choi(최재두),M.W. Lee(이명원) 大韓微生物學會 1983 大韓微生物學會誌 Vol.18 No.1

교량받침 교체를 위한 인상공법 시공사례 및 고찰

박순응(S. E. Park),이창훈(C. H. Lee),조명진(M. J. Cho),송길용(G. Y. Song),최재두(J. D. Choi),윤종서(J. S. YUN) 한국철도학회 2018 한국철도학회 학술발표대회논문집 Vol.2018 No.10