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6가크롬이 계배 간세포의 DNA , RNA , 및 단백질 함량에 미치는 영향
이종빈,양수인,위인선 ( Jong Bin Lee,Soo In Yang,In Sun Wui ) 한국환경생물학회 1988 환경생물 : 환경생물학회지 Vol.6 No.1
Cr^(6+)(1, 5 and 10㎍) was injected into the yolk sac of the fertilized eggs at certain time(0, 3 and 6 days) after incubation. At 14 days after incubation, the effects of Cr^(6+) on the mortality and the contents of the DNA, RNA and protein in surviving chick embryo liver were inverstigated. The other group injected Cr^(6+) at 13 days after incubation, the effects of Cr^(6+) on the contents of the macromolecules in chick embryo liver with the passing of time were investigated. When Cr^(6+) was injected just before incubation, the LD_50 was 10㎍. The longer and more expose to Cr^(6+), the more increeasingly the mortality and the decrease in the contents of the macromolecules. Decrease in the content of RNA was the most remarkable as compare to that of DNA or protein. It is suggest that the toxicity of Cr^(6+) firstly effect the transcriptional process. In the condition Cr^(6+) was injected into eggs which were incubated for 13 days. The contents of the macromolecules of liver after 3 days from injection decreased much more that of 1 day from injection. While, as time passed(after 5 and 7 days from injection) and contents of the macromolecules of liver recovered.
이종빈 ( Jong Bin Lee ),이준경 ( Jun Kyung Lee ),장성록 ( Seong Rok Chang ) 한국안전학회(구 한국산업안전학회) 2013 한국안전학회지 Vol.28 No.3
The goal of this study was to investigate some significant factors to influence level of safety at plant construction field and analyze degree of risk by work classification. Currently, there are lots of construction fields for the nuclear power plant for electricity generation, and our government also planned constructing more nuclear power plant in near future. However, much of the safety literature neglected the degree of risk factors on the plant construction field. Safety managers participated in the brainstorming session for drawing decision criteria of the degree of risk (i.e., significant factors). Then, they were asked to answer a structured questionnaire which was developed for drawing most important factors. Finally, the analytic hierarchy process (AHP) was used to analyze level of risk by work classification. The following results were obtained. First, total twelve factors judging degree of risk were found in the brainstorming session. Second, the questionnaire showed four significant factors, including number of workers, working environments, skill of brainstorming session. Second, the questionnaire showed four significant factors, including number of workers, working environments, skill of craft and accident experience. Third, the results of AHP showed Architecture work is the most dangerous work among 6 work types. The results could be used to reduce degree of risk in construction field of the nuclear power plant.
AHP를 이용한 원자력발전소 건설공사의 단위작업 위험도 평가
이종빈 ( Jong Bin Lee ),장성록 ( Seong Rok Chang ) 한국안전학회(구 한국산업안전학회) 2014 한국안전학회지 Vol.29 No.2
The purpose of this study is to analyze the degree of risk of the working unit of nuclear power plants construction. In order to do this, and the risk index by type and source of risk judgment derived in the previous study were utilized. Further, to derive a risk index of unit work in nuclear power plant construction, a survey targeting safety professionals was conducted. The analytic hierarchy process (AHP) was used for analysis of the survey. The following results were obtained. Firstly, the results of AHP showed that main building work is the most dangerous work, and base excavation work is the second dangerous work among 21 unit works. Secondly, so, it is required to invest more and to take a increasing interest in unit works of civil and architecture as compared to other unit works. Further, the results could be used to reduce the degree of risk in construction of the nuclear power plant.
좁은 치조골에 변형된 치조능 분할술/확장술을 이용한 임플란트 동시 식립
이종빈(Jong-Bin Lee),이재홍(Jae-Hong Lee),김영택(Young-Taek Kim) 대한치과의사협회 2015 대한치과의사협회지 Vol.53 No.8
The modified ridge splitting/expansion technique combined with guided bone regeneration (GBR) for implant surgery is used to expand the narrow and atrophied edentulous alveolar ridge. Also, the simultaneous implant placement after ridge splitting/expansion technique can reduce the treatment and healing time. This case report includes three patients with a narrow edentulous alveolar ridge of the 2 to 4mm. All three patients underwent a fracture of thin buccal cortical bone plate, and these defects were corrected by the use of the guided bone regeneration (GBR). After 7 to 18 months, all surgical area was stable, and all implant showed a good healing state on the clinical and radiographic examination. In conclusion, though this surgical method is technique sensitive, the modified ridge splitting/expansion technique combined with GBR for implant surgery is recommended for a horizontal augmentation in the narrow edentulous alveolar ridge.
이종빈 ( Jong Bin Lee ),한인국 ( In Kuk Han ),장성록 ( Seong Rok Chang ) 한국안전학회(구 한국산업안전학회) 2016 한국안전학회지 Vol.31 No.2
The goals of this study were to investigate some significant factors to judge level of safety at urban railway construction field and to analyze degree of risk by work classification. Currently, there are lots of construction fields for the urban railway for national transportation, and our government also planned constructing more urban railway in near future. However, most of the researches on safety neglected the degree of risk factors on the urban railway construction field. Safety managers participated in the brainstorming session for deriving decision criteria of the degree of risk (i.e., significant factors). Then, they were asked to answer a structured questionnaire which was developed for deriving most important factors. Finally, the analytic hierarchy process (AHP) was used to analyze level of risk by work classification. The following results were obtained. First, total twelve factors judging degree of risk were found in the brainstorming session. Second, the questionnaire showed four significant factors, including adjacency of obstacle, intensity of work, unsafe condition and work space. Third, the results of AHP showed civil work is the most dangerous work among 6 work types. The results could be used to give the safety management priority on accident prevention efforts among several hazards and to reduce degree of risk in construction field of the urban railway.