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김선봉,Kim, Seon-Bong 한국전자통신연구원 1997 전자통신동향분석 Vol.12 No.1
본 고는 미국의 전파통신 사업면허 경매제도가 우리나라에서도 현재 시행되고 있는 전파통신서비스 사업자 선정에 많은 시사점을 제공해주리라 기대되는 바, 미국의 경매제도 실시 현황과 광대역 PCS면허 A, B, C블록 중심의 경매결과와 그 결과에서 나타나는 특징 등을 분석하였다.
천연식품성분에 의한 의한 발암성 니트로사민생성인자 분해작용 2. 해조유출물의 아질산염 분해작용
김선봉,안장원,염동민,이동호,박영호,김동수,KIM Seon-Bong,AHN Bang-Weon,YEUM Dong-Min,LEE Dong-Ho,PARK Yeung-Ho,KIM Dong-Soo 한국수산과학회 1987 한국수산과학회지 Vol.20 No.5
The present paper was investigated to elucidate the nitrite-scavenging ability of seaweed extracts. Seaweed extracts possessed the scavenging ability of nitrite. By fractionation of seaweed extracts, nitrite-scavenging ability of laver(Porphyra tenera), sea lettuce(Enteromorpha compresa) extracts were effective in the water-soluble fraction, but sea mustard (Undaria pinnatifida), sea staghorn (Codium fragile) extracts in the methanol-soluble fraction. Nitrite scavenging ability of seaweed extracts was also pH-dependent, highest at pH1.2 and lowest at pH6.0. Particularly, nitrite-scavenging abilities of water-soluble fractions obtained from laver and sea lettuce were similar to that of L-ascorbic acid at pHl.2. After seaweed extracts were treated with sodium borohydride, nitrite-scavenging ability was remarkably decreased at pH1.2. It is assumed that reducing powers of seaweed extracts participated in their nitrite-scavenging abilities. 일상 식생활에서 널리 섭취하고 있는 해조류를 사용하여 니트로사민의 직접적인 생성인자인 아질산염 분해작용에 관하여 검토하였는데, 그 결과를 요약하면 다음과 같다. 1. 본 실험에 사용한 시료들의 아질산염 분해능은 김${\cdot}$파래 등은 수용성획분과 methanol 가용성획분에서, 미역${\cdot}$청각 등은 methanol 가용성획분에서 그 분해능이 높게 나타났다. 2. 반응용액의 pH 변화에 따른 아질산염 분해능은 pH 1.2에서 가장 컸으며, pH가 증가할수록 분해능은 감소하였다. 3. 각 시료를 10mg씩 취하여 얻은 아질산염 분해능은 동량의 L-ascorbic acid와 비교한 경우, 김과 파래는 pH 1.2에서 L-ascorbic acid와 거의 비슷한 분해능을 나타내었다. 4. 각 시료를 $NaBH_4$로 처리하여 환원능을 소실시킨 후에 측정한 아질산염 분해능은 pH 1.2에서 시료 모두 그 값이 현저하게 감소하였다.
김선봉,박석지,Kim, Seon-Bong,Park, Seok-Ji 한국전자통신연구원 1989 전자통신동향분석 Vol.4 No.1
전기통신분야의 기술개발활동은 크게 소요기술의 확보단계와 확보된 기술의 산업화(기업화)단계로 구분할 수 있으며 기술개발활동의 궁극적인 목적은 획득된 기술을 산업화에 이르게 하는것이라 할 수 있다. 본고에서는 이러한 기술의 산업화 과정에 있어서 국내의 현행 산업화 체계 및 관련제도의 분석을 통하여 효율적인 산업화 추진에 필요한 산업화 체제 및 관련제도의 개선방안을 제시하였다.
Maillard 반응에서 유래되는 저분자 Carbonyl 화합물의 DNA 손상작용에 대한 활성산소종의 역할
김선봉(Seon-Bong Kim),박성준(Seong-Jun Park),강진훈(Jin-Hoon Kang),변한석(Han-Seok Byun),박영호(Yeung-Ho Park) 한국식품영양과학회 1990 한국식품영양과학회지 Vol.19 No.6
Plasmid pBR322 DNA와 Maillard 반응생성물중 카르보닐화합물인 glyoxal, methyl glyoxal, dihydroxyacetone, diacetyl, glyceraldehyde, glycolaldehyde 및 furrural 등과 각각 37℃에서 반응시켰을 때 나타나는 DNA 손상능과 활성산소소거제에 의한 DNA손상억제작용을 agarose gel 전기영동을 통하여 살펴보았다. 카르보닐화합물을 37℃에서 6시간 동안 반응시켰을 경우, furfural을 제외한 모든 카르보닐화합물에 DNA손상능이 나타났는데, 그 중에서도 glyoxal, methyl glyoxal 및 dihydroxyacetone 이 diacetyl, glyceraldehyde 및 glycolaldehyde보다 DNA의 손상능이 크게 나타났다. 또한 plasmid DNA와 카르보닐화합물의 반응계에 각종 활성산소소거제의 첨가를 통하여 이들 카르보닐화합물에 대한 DNA의 손상을 검토한 결과 일중항산소, 과산화수소, superoxide anion 등이 주요원인물질로 밝혀졌으며, hydroxyl radical은 그 작용이 미약하거나 거의 영향을 나타내지 않는 것으로 나타났다. The role of the active oxygens on plasmid DNA damage by carbonyl compounds derived from Maillard reaction was investigated. Plasmid DNA extracted from E. coli Hb101 was reacted with carbonyl compounds, such as glyoxal, methyl glyoxal, dihydroxyacetone, diacetyl, glyceraldehyde, glycolaldehyde and furfural with and without the active oxygen scavengers at 37℃ for 6 hours, and then the degree of damage was determined by using 1% agarose gel electrophoresis. All of the carbonyl compounds except furfural caused to damage of DNA. Among these, glyoxal, methyl glyoxal and dihydroxyacetone markedly induced the damage of DNA. On the other hand, the DNA damage by the carbonyl compounds was greatly inhibited by catalase, superoxide dismutase and α-tocopherol it is considered that the damage of DNA is due to active oxygens, such as singlet oxygen, hydrogen peroxide and superoxide anion generated during the autoxidation of carbonyl compounds.<br/> Key words: DNA, low molecular carbonyl compounds, active oxygen, active oxygen scavengers.
김선봉 ( Seon-bong Kim ),유진삼 ( Jin-sam Yoo ) 한국고등직업교육학회 1999 한국고등직업교육학회 학술대회 논문집 Vol.1999 No.11
After the economic crisis of the IMF, Korean economy, which has fallen up to the minus growth, is rapidly recovering in this year. However, Korean economy is still confronted with the imminent issues that Korean government has to terminate the overall economic transition within the short term, to increase the economic stability and reliability, which is appraised by the foreign organization, and accordingly to increase the productivity of the overall Korean economy. First, deducting the interest rate and the liabilities' portion of the firm, Korean government need to decrease the burden of the financial cost, and to control the level of the excessive wage increase comparing with the level of the overall productivity increase. Second, Korean government needs to give its effort to break the unblanced exporting structure that has been depended on the importing ones. In order to accomplish it, Korean government need to foster the capital-intensive industry and the parts-related industry, because those are the heavy-burdened industry in importing. Those industry are changed a lot the cost of importing according to the fluctuations of the foreign exchange rate. Third, because, comparing with the level of the technology and the research and development of foreign countries, Korea is less developed and advanced, the price competitiveness is low. Korean government needs to support the firm in order to expand the research and development and to increase the level of the technology. Also, because the efficiency of the support is more important, Korean government needs to renovate the single system of the research and development in order to be enable the newly developed technology to commercialize Consequently, in order to expand the import and to overcome the chronic adverse balance of payments, Korean government needs to take the micro approach instead of the macro approach, such as the expedition of the economic transition, the cultivation of the capital-intensive industry and the part-related industry, and the escalation of the research and development.