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조재현,김성오,최형준,이제호,손흥규,최병재 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.1
외상성 손상 후 치아 탈구 시 치아를 저장하는 저장용액의 종류와 온도가 치주인대세포의 생존율에 어떠한 영향을 미치는지 연구하기 위하여 치주인대세포를 10% fetus bovine serum(FBD) 함유 α-minimal essential medium(α-MEM)에서 37℃ 5% CO_(2) 공기 혼합 배양기에서 배양하고 4.25, 37℃의 Hank's balanced sa1t solution(HBSS)과 α-MEM, 우유(S회사, P회사), tap water에 저장하고 60분이 지난 후 각 군에 대해 치주인대세포의 생존율을 측정하기 위하여 MTT assay를 시행하여 다음과 같은 결과를 얻었다. 1. 4℃ 저장용액의 치주인대세포의 생존율은 α-MEM과 P회사우유에서 가장 높았고 HBSS, S회사우유, tap water 순으로 낮았다. 2. 25℃ 저장용액의 치주인대세포의 생존율은 α-MEM에서 가장 높았고 P회사우유, HBSS, S회사우유, tap water 순으로 낮았다. 3. 37℃ 저장용액의 치주인대세포의 생존율은 α-MEM과 P회사우유, HDSS, S회사우유에서 높았고 tap water에서 가장 낮았다. 4. α-MEM의 치주인대세포의 생존율은 4℃에서 가장 높았고 25℃와 37℃ 순으로 낮았으며 HBSS에서는 4℃에서 높았고 25℃와 37℃에서 낮았다. 5. S회사와 P회사우유에서 치주인대세포의 생존율은 4℃와 25℃에서 높았고 37℃에서 낮았다. 이상의 결과를 종합해볼 때 외상으로 인해 치아가 탈구되었을 때 탈구된 치아의 저장용액으로 HBSS 용액이 추천되고 있으나 이 연구에서 4℃와 25℃ 우유에서 치주인대세포의 생존율이 높았으므로 사고 현장에서 쉽게 구할 수 있고 치주인대세포의 생활력 보존에도 유리한 낮은 온도의 우유에 탈구된 치아를 보존하는 방법도 좋을 것으로 생각된다. To compare the survival rate of periodontal ligament cells preserved in storage media with good availability at the time of an avulsion injury, periodontal ligament cells were incubated in α-MEM culture medium containing 10% FBS in condition of 37℃, 5% CO_(2). These cells were then cultured in HBSS, α-MEM, milk(S. co., P. co.) and tap water at the temperature of 4, 25, 37℃ each in 60 min. The groups were measured by MTT assay. The results were as follows : 1. Among the storage media at 4℃, α-MEM and P-milk had the highest preserving ability of periodontal ligament cells, while that of HBSS, S-milk and tap was low in order. 2. Among the storage media at 25℃, α-MEM had the highest preserving ability of periodontal ligament cells, while that of P-milk, HBSS, S-milk, tap water was low in order. 3. Among the storage media at 37℃, the preserving ability of periodontal ligament cells was very high in α-MEM, P-milk, HBSS and S-milk. it' s lowest in tap water. 4. The preserving ability of periodontal ligament cells in α-MEM was high at 4℃ and it’s low in order of 25℃, 37℃, but in HBSS was high at 4℃ and it's low at 25℃, 37℃. 5. The preserving ability of periodontal ligament cells in S-milk and P-milk was high at 4℃, 25℃ and it’s low at 37℃. In conclusion, HBSS is the storage medium of choice in an avulsion, but in this study it is preferable to choose milk at 4℃ for tooth since it is easy to get and affect cell viability.
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曺在興,陸燦男 조선대학교 기초과학연구소 1987 自然科學硏究 Vol.10 No.1
Crystallization of PET copolymers with some comonomers were studied by differential scanning calorimetry and densitometry. The results as follows; (1) Crystallinities of PET were increased with increasing the densities of the PET copolymers. (2) Crystallization was delayed with increasing the viscosities of PET copolymers. (3) Crystallization temperature were decreased with increasing the mole percent of copolymers used.
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Dimethylsulfoxide 용매속에서 Tropaeolin의 Polarography적 환원에 관한 연구
조재흥,윤석진,김두화 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1
反陽性子性 溶媒인 dimethylsulfoxide (DMSO)中에서 Tropaeolin에 대하여 직류폴 라로그래피적 거동을조사하였다. 0.05M NaCIO_4의 DMSO溶媒中에서 Tropaeolin은 /電子/段階의 還元過程을 거쳐 hydrazo化合物로 還元된다. 各段階의 還元電流는 擴散支配的 이었으며 一部 反應電流도 包含되었다. *공식은 원문참조 The direct current polarographic behavior of Tropaeolin in dimethyIsulfoxide as an aprotic solvent have been investigated. The reduction of Tropaeolin in 0.06M sodium perchlorate solution proceeds along two one-electron steps to give the corresp ending compound containing hydrazo group, each reduction wave was considerably diffusion controlled and irreversible. *formula see the original
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조재흥,김호두,신영욱 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1
The pulling apparatus for the growth of single crystalline solids was made by sing the Czochralskis' method. The sing1e crystaline solids with 4Agl-NaI,4Ag I-KI,4AgI-RbI and 4Ag I-NH_4I system have been grown without seeds of crystalline solids cooling at various temperatures of growth and considering the pulling and rotating rates of shaft from the appanatus mentioned above. The single crystalline solids grown were indentified by using the analytical data measured in the visible range of the X-ray diffractometer, polarimeter and polarizing microscope. All of the crystalline solids were grown at the range of 6.5~10.3cm lengthand 0.8~1.5cm diameter, respectivity and these crystalline solids have the structures of d and ℓorientation.
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曺在興,曺秉旭 朝鮮大學校 工科大學 1974 論文集 Vol.3 No.-
This study is carried out to find out how to neutralize and fertilize the acidified soil of this country by using briquette ash. In order to increase the alkali content in briquette ash, certain amount of shell-lime is added in the process of the manufacture of briquette. After examining the PH variation of the briquette ash and the charge in physical property and PH of the soil to which briquette ash is added, the practicability is considered in view of the calorific value and combustion temperature of the skell-lime added briquette. 1. The result obtained is that the PH of briquette ash is three or four times as high as that of Korean typical soil. 2. The result obtained is that the most favorable ratio of shell-lime in the briquette is 3 percent, considering the heat and combustion temperature when the briquette burns. 3. When briquette ash is added, the available water content increases by 36% (10.7%∼46.7%) and the bulk density of the soil decreases considerably.
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2-(5-Nitro) furoylsulfonamide類의 合成에 關한 硏究(Ⅰ)
高玉鉉,曺在興 朝鮮大學校 工科大學 1974 論文集 Vol.3 No.-
In order to find 2-(5-Nitro) furoylsulfonamide derivatives possessing antimicrobial activity, four new 2-(5-Nitro) furoylsulfonamide derivatives obtained by the action of 2-(5-Nitro) furoylchloride on sulfonamides, such as sulfadiazine (2-sulfanilamidopyrimidine), sulfadimethoxine (2.6-dimethoxy-4-sulfanilamidopyrimidine), sulfamethoxypyridazine (3-methoxy-6-sulfanilamidopyridazine), sulfamerazine (4-methyl-2-sulfanil-amidopyrimidine), sulfamethazien (4.6-dimethyl-2-sulfanilamidopyrimidine), were synthesized according to Schotten-Baumann method.
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Oligodeoxyribonucleotides의 합성을 위한 유기염기의 보호기 도입
노봉오,조재흥,신대현 조선대학교 기초과학연구소 1990 自然科學硏究 Vol.13 No.1
In this study the starting materials, 2'-deoxyriboadenosine and 2'-deoxyribocytidine, were protected selectively as the tritylation of the 5'-hydroxyl group and the N-acylation of the amino group with 4,4'-dimethoxytrityl chloride and benzoyl chloride, in a oneflask procedure. Protection of the amino group and the 5'-hydroxyl group in 2'-deoxyguanosine can be performed directly by isobutyric anhydride and 4,4'-dimenthoxytrityl chloride pyridine to obtain 2-N-isobutyryl-5'-O-dimethoxytrityl-2'-deoxyguanosine in a one-flask procedure. The protected deoxyribonucleotides have been crharacterized on UV, IR and ^1H-NMR spectroscopy.
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Bis(triphenylphosphine) copper(1) tetrahydroborate에 의한 4-Bromophenyacetylchloride의 환원반응
조성동,김두화,박정환,김인경,조재흥 조선대학교 기초과학연구소 1991 自然科學硏究 Vol.14 No.1
4-Bromophenylacetylchroride was reduced to 4-bromophenylacetaldehyde in good yield by bis(triphenylhosphine) copper(1) tetrahydroborate.
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