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김동건,이기정,이준정 대한금속재료학회(대한금속학회) 1984 대한금속·재료학회지 Vol.22 No.10
Effect of transformed ferrite content on the mechanical properies of dual-phase steels has been studied and analyzed on the basis of observation on the austenite-to-ferrite transformation behavior during post-anneal cooling. Various contents of transformed ferrite were obtained by changing intercritical annealing temperature. As the transformed ferrite content was increased up to about 40%, dual-phase properties became better due to the finer distribution of martensite particles. However, the dual-phase properties were deteriorated when the transformed ferrite content becomes larger than the retained ferrite content. The significance of these results is discussed in relation to the austinite-to-ferrite trans formation behavior during intercritical annealing.
꼬마잠자리(Nannophya pygmaea Rambur: Libellulidae, Odonata) 알의 부화에 미치는 온도의 영향
김동건,염진화,윤태중,배연재,Kim, Dong-Gun,Yum, Jin-Whoa,Yoon, Tae-Joong,Bae, Yeon-Jae 한국응용곤충학회 2006 한국응용곤충학회지 Vol.45 No.3
멸종위기종인 꼬마잠자리의 부화율을 5개의 온도조건($10,\;15,\;20,\;25,\;30^{\circ}C$)에서 조사하였다. 꼬마잠자리의 알은 2006년 7월 경상북도 문경시 일대의 한 작은 습지에 서식하는 암컷 성충으로부터 채취하였다. 부화율은 100일 동안 부화한 유충의 수로부터 구하였다. 꼬마잠자리의 알은 20, 25 및 $30^{\circ}C$의 온도조건에서 각각 83, 89 및 76%가 부화하였으며, $10^{\circ}C$와 $15^{\circ}C$에서는 실험기간동안 부화하지 않았다. 꼬마잠자리 알의 부화 임계온도는 $14.3^{\circ}C$로 추정되었으며, 다른 온대성 잠자리류보다 상대적으로 높았다. The hatching rate of the eggs of Nannophya pygmaea Rambur, an endangered dragonfly species in Korea, was experimented in different temperature conditions ($10,\;15,\;20,\;25,\;and\;30^{\circ}C$) in laboratory. N. pygmaea eggs were collected from female adults inhabited a small wetland in Mungyong-si, Kyeongsangbuk-do, Korea, in July 2006. The hatching rate was evaluated from the number of hatched nymphs for the period of 100 days. As a result, the hatching rates were 83, 89, and 76% at $20,\;25,\;and\;30^{\circ}C$, respectively; however, eggs were not hatched at $10^{\circ}C\;and\;15^{\circ}C$ during the experiment period. The derived thermal threshold for egg hatching was $14.3^{\circ}C$, which is relatively higher than the values of other temperate dragonflies.
김동건 연세법학회 ( 구 연세법학연구회 ) 2003 연세법학 Vol.9 No.2
The Constitution declares the principle of parliamentary legislation in Article 40. But Articles 75 and 95 (and some more Articles in Constitution) permit the Administration to make legislations. on the ground of delegation. And Administration has another power of rule-making. Under the principle of “rule of law” administrative rule cannot regulate the people directly. It can only regulate the administrative office and its people directly. But sometimes the Supreme Court granted that it has the power to regulate the people directly. In that case some questions are arising. Administration rule-making procedure is different from that of Administration legislation. But the regulating power is very similar. So the Administration rule that has the regulating power must be promulgated and be open to the judgement of the court.
김동건 연세법학회 ( 구 연세법학연구회 ) 2003 연세법학 Vol.10 No.1
Cyber-medicine is the model of health care offerings via the Internet. As computers become more accessible and increasing numbers of people become familiar with the Internet, patients will have the opportunity to take advantage of the unique health care possibioities offered by cyber-medicine. Cyber-medicine enables interactions between doctor and patient. And now cyber-medicine may prove to be a significant advance in the provision of medical services. But Cyber-medicine offers both the best and worst of Internet technology.
金東建,坂部寬,小西孝 한국잠사학회 1998 한국잠사곤충학회지 Vol.40 No.2
Changes of silk fibroin molecular weight was studied by enzymatic proteolysis and reverse reaction of enzymatic proteolysis (plastein reaction) using chromatography, X-ray diffraction and thermal analysis methods. When the treatment of enzymatic proteolysis with α-chymotripsin to silk fibroin solution, a precipitate of Fcp fractions was formed. And, this was dissolved in LiBr aqueous solution, the precipitate of PIFcp fractions was obtained again. Fcp and PIFcp fractions showed silk II and silk I type structure, respectively. Fcp fractions was about 6,900 in molecular weight PIFcp fractions obtained by plastein reaction on the precipitate of Fcp fractions increased molecular weight to about 15,000. The molecular weight of Fcp fractions was increased by plastein reaction, but Fcp fractions almost transited to silk I type crystal. The structure of silk I type of PIFcp fractions was steady identified by X-ray diffraction and thermal analysis. As molecular weight of Fcp fractions was gradually low, PIFcp fractions was become to macromolecule little by little.
내열 및 난연성 Ploymethyl Methacrylate 의 최적 반응속도 모델에 관한 연구
김동건,손진언,설수덕 한국고무학회 1987 엘라스토머 및 콤포지트 Vol.22 No.4
The thermal degradation of the homopolymer poly(methyl methacrylate) (PMMA) and flame-retardant tetrabromobisphenol-A (TBBA) as well as of their blends were carried out using the thermogravimetric method in the stream of nitrogen gas with 60㎖/min at various heating rate from 1 to 20℃/min. Friedman and Ozawa mathematical methods were used to obtain the value of activation energy.
Poly(Acrylonitrile - EPDM - 4 - Chlorostyrene)과 스티렌공중합체의 합성과 열분해에 관한 연구
김동건,하창식,설수덕,신봉섭 한국화학공학회 1992 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.30 No.6
Ethylene-propylene-diene terpolymer(EPDM)에 대한 4-chlorostyrene과 acrylonitrile의 그라프트 공중합은 반응온도 70℃에서 benzoyl peroxide(BPO)를 개시제로 사용하여 합성하였다. Poly(acrylonitrile-EPDM-4-chlorostyrene)(AECS)의 그라프트효율은 tetrahydrofuran(THF)을 용제로 사용했을 때가 가장 좋았고, 그 효율은 76%이었다. AECS의 내열, 난연, 내광 및 내후성을 Poly(acrylonitrile-butadiene-styrene) (ABS), Poly(α-methylstyrene-acrylonitrile) (α-SAN), Poly(acrylonitrile-EPDM-styrene) (AES)와 비교하였다. 열중량법(TGA)과 시차주사열량법(DSC)에 의한 열분해의 활성화에너지 값은 AECS(49-51 ㎉/㏖)>AES(46-50 ㎉/㏖)>α-SAN(45-49 ㎉/㏖)>ARS(44-46 ㎉/㏖)의 순서이다. 내광성과 내후성에 대한 순서는 AES>AECS>α-SAN>ABS의 순이었다. AECS의 열분해반응은 400℃ 이하의 온도에서는 주쇄분해반응으로 이루어진다. The graft copolymer of 4-chlorostyrene and acrylonitrile onto ethylene-propylene-diene terpolymer(EPDM) was synthesized with benzoyl peroxide(BPO) as an initiator at 70℃. The maximum grafting efficiency was 76% when tetrahydrofuran(THF) was used as a solvent. The thermal degradation, flame retardancy, light resistance and weatherability of AECS were compared with those of Poly(acrylonitrile-butadienestyrene) (ABS), Poly(α-methylstyrene-acrylonitrile) (α-SAN), Poly(acrylonitrile-EPDM-styrene) (AES). The activation energies of thermal degradation determined by thermogravimetry(TGA) and differential scanning colorimetry(DSC) were in the order of AECS(49-51 ㎉/㏖)>AES(46-50 ㎉/㏖)>α-SAN(45-49 ㎉/㏖)>ABS(44-46 ㎉/㏖). The light resistance and weatherability were in the order of AES>AECS>α-SAN>ABS. The thermal degradation of AECS was considered to happen by main chain scission at an environment temperature below 400℃.
유령멍게 (Ciona intestinalis: Ascidiacea, Phlebobranchia, Cionidae)의 초기 성장에 미치는 온도의 영향
김동건,박주언,김동현,윤태중,신숙 한국환경생물학회 2017 환경생물 : 환경생물학회지 Vol.35 No.1
A native species to the European ocean, the tunicate Ciona intestinalis now appears worldwide, from sub-Arctic to tropical regions. C. intestinalis generally occurs as an opportunistic fouling organism on artificial substrates in harbors or aquaculture. This study focused on estimating the early growth pattern of C. intestinalis under various temperature conditions. Adults were collected from the Guryungpo harbour in November 2017, and their artificially inseminated eggs were used for the study. The growth of the C. intestinalis was investigated at 8 constant temperatures, ranging from 12°C to 26°C, at 30 psu. Results indicate that the growth of C. intestinalis increased with increasing temperature. The growth was sluggish at 12°C, and decreased at 26°C. The optimal temperature for growth of C. intestinalis was therefore estimated to be between 20°C and 24°C.