• Radioisotope journal
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• v.20 no.3
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• pp.61-63
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• 2005

• 동위원소뉴스
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• no.4 s.64
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• pp.1-1
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• 2002

• 동위원소뉴스
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• no.7 s.115
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• pp.2-3
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• 2006

• 동위원소뉴스
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• no.12 s.48
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• pp.1-1
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• 2000

• 동위원소뉴스
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• no.10 s.106
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• pp.1-1
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• 2005

• Korean Journal of Microbiology
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• v.52 no.1
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• pp.120-124
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• 2016

A certain size of DNA (28-29 kb long) to be packaged into P2-size head and the mutation in sid gene of bacteriophage P4 are the major factors to overcome "P2 sir-associated helper inefficiency". To clarify whether the presence of sid mutation is essential to overcome "P2 sir-associated helper inefficiency" or not, we tested the P4 derivative, P4 delRI::kmr, which is $sid^+$ and whose genome size supposed to be 28.5 kb long in the case of being packaged into $P2_{sir3}$-sized large head. As P4 delRI::kmr showed the low EOP with P2 sir3 lysogen, P4 delRI::kmr phage stock was prepared in P2 sir3 lysogen host to increase the EOP with P2 sir3 lysogen. Through this process, P4 delRI::kmr had been adapted for P2 sir3 lysogen. With a CsCl buoyant equilibrium density gradient experiment and gel electrophoresis of the isolated DNA, it was evident that the adaptation of P4 delRI::kmr for P2 sir3 lysogen was caused by the conformational change of DNA to be packaged into large head. The burst size determination experiments with P4 delRI::kmr phage stock adapted for P2 sir3 lysogen and normal P4 delRI::kmr phage stock showed that not the sid mutation but the size of DNA to be packaged (28-29 kb long) was essential to overcome "P2 sir-associated helper inefficiency".

• Nuclear industry
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• v.5 no.7 s.29
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• pp.18-21
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• 1985

1930년이래 원자로나 입자가속기를 이용하여 여러 종류의 방사성동위원소(Radioisotope, RI)를 인공적으로 생산하게 됨에 따라 1960년대부터는 인공 RI를 여러 분야에서 이용하게 되었고, 우리나라에서도 상당량의 RI 및 그 표식화합물들을 생산 또는 수입하여 이용함으로써 우리 생활과 밀접한 관계를 갖게 되었다. 더구나 천연자원이 부족한 우리나라는 원자력발전을 통하여 그 돌파구를 찾지 않을 수 없게 됨에 따라 원자력은 우리 앞에 성큼 다가왔고 여러가지 RI 및 방사선에 대한 관심도 높아졌다. 즉, 우리는 이제 원자력시대에 살고 있어 이와 관련한 기본지식을 외면하는 것은 곧 현실을 외면하는 것이 되었다. 최첨단 거대과학, 그 한쪽 분야를 살펴 보기로 하자.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05d
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• pp.147-154
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• 1996

외국에서는 도로건설시 성토관리용으로 '방사성동위원소(Radioisotope : 이하 RI)를 이용한 습윤밀도 및 함수량 측정장비'가 많이 사용되고 있는 추세이다. 국내에서는 1989년 제정된 건설 기술관리법 감리전문회사건립 등록기준에 밀도\ulcorner함수량 측정기의 보유가 명시되어 있고 시공성 향상 차원에서 도입될 예정이다. 그러나 국내의 토양에 맞게 제작되어지지 않았고 사용상의 방사선 관련 제약 때문에 기대만큼 실제 사용이 되지 않고 있다.$^{(1)}$ 연구발표내용은 국내에서 제작, 실험하여 만들 RI계기개발의 기초가 되는 내용이며, 만들어질 계기의 부품과 계산과정 등을 예측하는 것이다.

• 동위원소뉴스
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• no.11 s.71
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• pp.9-10
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• 2002

• Korean Journal of Heritage: History & Science
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• v.54 no.2
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• pp.98-119
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• 2021

This thesis aims to examine when the petroglyphs of Cheonjeon-ri, Ulju were carved and their nature. To achieve this, the relations between rituals and rock carving motifs are examined besides the nature of the archaeological monuments with carved petroglyphs. The investigation revealed that the figurative motifs on the petroglyphs of Cheonjeon-ri, Ulju, may have been carved during the Korean Bronze Age considering other examples of figurative petroglyphs from that period. It is reasonable to assume that the figurative animal motifs on the petroglyphs of Cheonjeon-ri, Ulju were used for rituals of fertility and rebirth as a subsistence ritual during the Korean Bronze Age. The Geomdan-ri Archaeological Culture Type is a strong candidate, having used both petroglyphs of Cheonjeon-ri and those of Bangudae, Ulju, since the Geomdan-ri Archaeological Culture Type has a higher proportion of hunting and fishing and lower proportion of rice cultivation in its subsistence than in the subsistence of the Songguk-ri Archaeological Culture Type. In contrast to the figurative motifs, the abstractive motifs, including the geometric designs on the petroglyphs of Cheonjeon-ri, Ulju, are generally accepted to have been carved during the Bronze Age. Although there have been some disputes over the symbolic meanings of concentric motifs, lozenge motifs, and other geometric motifs, they may be related to rituals for sun worship, ancestor worship, and fertility cults. Their meanings have been continuously reinterpreted.