Poly (1-(2-Carbomethoxyacryloyl)-5-Fluorouracil)의 Drosophila 대사과정에 미치는 생리유전학적 영향에 관한 연구

李元鎬,金益成,趙元濟 부산대학교 환경문제 연구소 1985 環境硏究報 Vol.3 No.-

Genetic study on 5-fluorouracil(5-FU), 1-(2-carbomethoxyacryloyl)-5-fluorouracil(CMA-FU) and poly(CMAFU) treated in Drosophila melanogaster was undertaken by the adult feeding method of Lewis and Bacher. Toxic capacity, sex ratio, egg to adult viability, required developmental period, fecundity, and productivity induced by 5-FU, CMAFU, and poly(CMAU) had been analyzed. The results obtained were as follows: 1) The order of toxicity was decreased by 5-FU, CMAU, poly(CMAU) and control group. But there was no change by varying concentration. 2) The effects on the sex-chromosome were regarded by the sex ratio:In the control, sex ratio was 0.5349, in experimental groupⅠ treated with 5-FU 0.5862, in the groupⅡtreated with CMAFU 0.5747, and in the groupⅢ treated with poly (CMAFU) 0.5758, respectively. The differences between control and experimental groups were not significant. 3) The egg to adult viability of OR females was 86 percent in the control group, 0 in the experimental groupⅠ, 60 percent in the experimental groupⅡ, and 65 percent in the experimental groupⅢ. 4) The reguired developmental periods were calculated to be 9.43 days in the control group, 0 in the experimental groupⅠ,13.29 days in the group Ⅱ, and 13.23 days in the group Ⅲ. 5) The fecundities appeared from the first to the fifth culture were 16 eggs in the control group,12 in the experimental group Ⅰ,Ⅱ, and 13 in the groupⅢ, respecively. 6) The productivities were calculated to be 178 in the control, 0 in the experimental groupⅠ, 152 in the groupⅡ, and 186 in the groupⅢ. 7) It is found that a physiological genetic effect on the Drosophila melanogaster is much weaker for CMAFU and poly (CMAFU) than for 5 FU.

국산 및 수입 Luncheon Meat의 품질비교에 관한 연구

김천제,최수일,한의수,이효진,고원식 건국대학교 동물자원연구센터 1991 動物資源硏究誌 Vol.16 No.-

본 연구는 국내에서 생산되고 있는 돈육 luncheon meat과 수입 luncheon meat의 성분조성 및 품질을 비교 평가하기 위하여 실시하였다. 그 결과를 요약하면 다음과 같다. 1) 국산돈육 luncheon meat의 수분함량은 57.2%로 수입품(53.1%)보다 높았으며 조지방 함량은 수입품(53.1%)보다 높았으며 조지방 함량은 수입품이 26.6%로 국산품(20.6%)보다 높았다. 그러나 조단백질 함량은 거의 같았다. 2) 국산돈육 luncheon meat와 수입품 모두 대장균이 검출되지 않으며, 타르색소(tar colors)도 사용하지 않은 것으로 나타났다. 3) 국산돈육 luncheon meat의 NO₂의 함량은 4 ∼ 35ppm으로 돈육수입 luncheon meat(1.7∼6ppm)보다 높았다. 4) 국산돈육 luncheon meat의 TBA가는 0.09∼0.13로 비교적 낮았으나, 유통기간이 긴 수입돈육 luncheon meat는 0.09∼0.39로 국내제품에 비하여 상대적으로 높은 값을 나타내었다. 5) 국산돈육 luncheon meat의 VBN(12.3∼18.4mg%)은 수입품(15.7∼18.2mg%)보다 낮았다. 6) 수입 luncheon meat는 국산 luncheon meat보다 jelly loss가 약2배 높았다. 7) 경도는 국산돈육 luncheon meat통조림이 수입품보다 높은 것으로 나타났으나, 탄력성과 응집성은 큰 차이가 나지 않았다. The aim of this study was to assay and compare the ingredient or composition and quality of imported pork luncheon meat with those of domestic's. The results obtained were as follows. 1. The amount of water in domestic pork luncheon meat products(57.2%0 was higher than that of imported products(52.2%0, and the content of crude fat in imported products(26.6%) was higher than that of domestic products(20.6%). The amount of crude protein, however, both domestic and imported products was approximately the same. 2. E.coli was not found in both domestic and imported products. No tar-colors were detected in both samples. 3. The amount of NO₂in domestic pork luncheon meat products(4 to 35ppm) was higher than that of imported products(1.7 to 6ppm). 4. The TBA-value of domestic pork luncheon meat products(0.09 to 0.13) was relatively low, whereas the value of imported products was higher than that of domestic products(0.09 to 0.39). 5. The VBN-value of domestic luncheon meat products(12.3∼18.4mg%) was lower than that of imported products(15.7∼18.2mg%). 6. The jelly loss of imported pork luncheon meat products was approximately 2 times higher than that domestic's . 7. The hardness of imported pork luncheon meat products was lower than that of domestic products. Elasticity and coheshiveness in both products were not significantly different.

Styrene과 Allyl acrylate와의 放射線共重合에 關한 硏究

趙元濟,李億石 부산대학교 1973 論文集 Vol.15 No.2

The thermal copolymerization of styrene with ally acrylate was carried out in the presence of AIBN at 65℃. The radiation-induced copolymerization of styrene with allyl acrylate was carried out by the Co-60-γ-ray irradiation. The conversion percent of thermal and radiation-induced copolymerization was rapidly decreased to 0.4 mole fraction of styrene in the monomer mixtures but was not nearly changed from 0.4 to 0.7. The I.R. spectrum of styrene-ally acrylate copolymer was observed at 1730~1715cm^(-1) and 800~600cm^(-1). Intrinsic viscosity of thermal and radiation induced copolymerization was rapidly decreased to 0.6 mole fraction of styrene in the monomer mixture but was not nearly changed from 0.6 to 0.8.

Styrene과 Allyl methacrylate와의 共重合에 關한 硏究

趙元濟,文正大,閔泰益 부산대학교 1972 論文集 Vol.14 No.2

The copolymerization of allyl compound, beginning with copolymerization of allyl acetate with vinyl acetate and so on, have already been reported by some researchers. There are not so many quantitative researches on copolymerization of allyl methacrylate with various monomer. Allyl methacrylate have two unsaturated double bond having polymerizability in molecule so that it is expected that its copolymer with vinyl compounds will be various properties and uses. In this paper, the copolymerization of styrene with allyl methacrylate were carried out in the presence of AIBN as initiator at 60℃ studied in its copolymerization conversion percent, intrinsic viscosity, softening point, monomer reactivity ratio, and also discussed I. R. spectrum of stryrene of stryrene allyl methacrylate copolymer.

운동이 정신지체 성인여성의 골밀도에 미치는 영향

장명재,최지우,최원현,최현희 경희대학교 체육과학연구소 2000 體育學論文集 Vol.28 No.-

The purpose of this study was to investigate the effect of exercise to mentally retarded women's bone mineral density. Subjects were divided into three groups: Group A(age:27.9yr, n=8)-This group was mentally retarded exercise women, who had been doing regularly exercise for over three years. Group B(age:28.8yr, n=8)-This group was mentally retarded non exercise women, who hadn't been doing it as usual. Group C(age:29.0yr, n=8) This group was normal women, who hadn't been doing it as usual. This study analysed and compared the bone mineral density between these three groups. The results were summarized as follow. 1.The BMI of group A(Mentally retarded exercise group) was 22.8±3.28 kg/m2, group B(mentally retarded non exercise group) was 22.6±5.6 kg/m2, and Group C(normal group)was 22.0±2.2 kg/m2. There were no significant differences in BMI between three groups. 2.There were significant difference in grip strength and back strength between three groups(p〈.001). The grip strength of group A was 16.9±6.5 kg, group B was 12.2±4.0 kg, and group C was 31.8±2.1 kg. The back strength of group A was 36.9±16.1 kg, group B was 34.2±8.4 kg, and group C was 96.9±32.7. 3.These were significant difference bone mineral density of lumbar between these groups. Group A was 0.1±0.08 g/cm2, Group B was 0.888±0.10 g/cm2, and group C was 1.05±0.04 g/cm2(p〈.01). 4.These were very significant difference bone mineral density of femur between these groups. Group A was 0.91±0.09g/cm2, group B was 0.74±0.08 g/cm2, and group C was 0.97±0.14 g/cm2(p〈.0001). 5.These were very significant difference bone mineral density of Forearm between these groups. Group A was 0.6±0.02 g/cm2, group B was 0.56±0.03 g/cm2, and group C was 0.63±0.02 g/cm2(p〈.0001). 6.Group A were correlations between bone mineral density of femur(neck) and BMI, weight(p〈.05). 7.Group B were correlations between bone mineral density of forearm(MID, total) and age(p〈.05). 8.Group C were correlations between bone mineral density of lumbar(L1) and age, BMI, back strength(L4).

합성펩타이드를 이용한 영양배엽세포-특이 가토 다클론 항혈청의 제작

이희섭,오재민,김정중,문형배,김원신,이황희 원광대학교 생명공학연구소 1995 생명공학연구소보 Vol.3 No.1

Within the last few years, a different approach to generating protein-reactive antibodies has been developed that has several advantages over conventional immunization. This involves synthesizing short peptide sequences, coupling them to immunogenic carrier molecules, and immunizing animals with the conjugates. 3βHSD(3β-hydroxy-5-ene steroid dehydrogenase; EC 1.1.1.145) is the enzyme of the plasma membrane of human trophoblast and it's cDNA sequence was identified by Nickon et al(Molecular cloning and expression of human trophoblast antigen FDO161G and its identification as 3β-hydroxy-5-ene steroid dehydrogenase. J Reprod Fert 1991;149;156). For the production of trophoblast-specific antibody, we synthesized three oligopeptides that are epitope sites chosen from cDNA sequence of 3βHSD. Oligopetides were coupled with KLH(keyhole limpet hemocyanin) under 25% glutaraldehyde. The trophoblast-specific rabbit polyclonal antisera was produced by conventional methods. This antisera reacts with a 43kDa protein in human placental lysate by Western blotting analysis and The syncytiotrophoblasts and cytotrophoblasts from villi are stained positively with this antisera by immunohistochemistry. Villous trophoblasts were cultured in methionine-free media for 1 hour and [^(35)S]-Methionine for 24 hours. Media and cell lysate were immunoprecipitated with this antisera and 12% SDS-PAGE was performed. In fluorography, bend was not noted in media and 43kDa band was noted in medis and 43kDa band was noted in lysate. It was concluded that anti-3βHSD antibody produced by synthetic peptide was specific to trophoblasts and 3βHSD was membrane-bound protein of trophoblasts.

알루미늄-크롬 용융도금 강판의 식염수중에서의 부식거동

임병문,홍승현,정재인,최장현,정원섭 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.8

The microstructure and the corrosion behavior of aluminized steel sheet and hot-dipped Al-Cr wteel sheet were investigated. The EPMA, GDLS and XRD measurements of the Al-Cr coated layer showed that the coating layer was characterized by three phases. The surface layer was Al, the middle layer was Al_(13)Cr_(2), and the interfacial layer between the Fe substrate and the coated layer was composed of Al_(13)Fe_(4) and Al_(5)Fe_(2). The polalization curve indicates that the corrosion behavior of Al-Cr coated layer was different from that of Al coated layer. For the Al coated layer, porosities in the Al-oxide film on the surface layer lead to preferential corrosion. After the Al coated layer was completely removed, the Al_(5)Fe_(2) layer was selectively corroded and then, the steel substrate was exposed to the corrosion medium. In case of the Al-Cr coated layer, the Al_(13)Cr_(2) layer became a barrier against further corrosion after the Al layer was removed. In this case, corrosion was not proceeded even through the same current density. The high corrosion resistance was due to the existence of the Al_(13)Cr_(2) layer.

폴리메틸비닐케톤 및 메틸비닐케톤을 포함하는 공중합체들의 합성과 물성에 관한 연구

김영민,오상훈,조원제 부산대학교 공과대학 1987 硏究報告 Vol.34 No.-

The homopolymerization of methyl vinyl ketone was carried out with AIBN as an intiator in benzene under various conditions. From the result of kinetic investigation of methyl vinyl ketone, a rate equation was obtained. d[M] -------- = k_(p)[M][I]½ dt The overall activation energy for the polymerization was found to be 7Kcal/mole. Molecular weights of poly (methyl vinyl ketone) were measured by the Cannon-Fenske viscometer and GPC. Plot of intrinsic viscosity [η] versus Mw on a double logarithmic graph indicated the following equation [η]=77×10^(-5)Mw^(0.72) Poly (acetyl acetylene) was obtained by the reaction of poly (methyl vinyl ketone) with phosphorus oxychloride in chloroform at 0℃ under various reaction time. The radical copolymerizations of methyl vinyl ketone(MVK) with methyl methacrylate(MMA) and methyl acrylate (MA) were carried out with AIBN as an initiator at 50℃ in bulk. The specific extinction coefficients on poly(MVK-co-MMA) and poly (MVK-co-MA) were measured by means of UV spectrophotometer at 288nm in THF. From the calibration curves obtained by the different concentration ratios of each homopolymers, the following equations were derived. ε=0.0153+5.99×10^(-3)χ for poly (MVK-co-MMA) ε=0.112+1.102 χ for poly (MVK-co-MA) where ε is the specific extinction coefficient of the copolymer and χ is the weight fraction of MVK unit in the copolymer. The following monomer reactivity ratios were determined. r₁(MVK)=0.5 and r_(2)(MMA)=0.95 for poly (MVK-co-MMA) r₁(MVK)=1.85 and r_(2)(MA)=0.99 for poly (MVK-co-MA) From DSC thermal analysis, glass transition temperature (T_(g)) of PMVK and PMMA are 307˚K and 386˚K, respectively. The glass transition temperatures of copolymers were increased with increasing MMA component in copolymer. The conductivity of poly (acetyl acetylene) increased from 10^(-6) Ω^(-1) cm^(-1) to 10^(-4) Ω^(-1) cm^(-1) with increasing the reaction time of poly (methyl vinyl ketone) and phosphorus oxychloride. In the reaction of poly (MVK-co-MA) with phosphorus oxychloride in chloroform at 0℃, the conductivity of the obtained copolymer was 10^(-6) Ω^(-1) cm^(-1).

Introduction to Chemical and Electrochemical Measurement Methods of Oxide Ion Concentration in Molten Salts

Jei-Won Yeon 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

Measurement of oxide ion (O2-) concentration is a basic technology required in molten salt fields, from energy storage systems to electrolytic reduction of rare earth elements or spent nuclear fuels. In a molten salt reactor, O2- ions react with actinide elements to form their oxides or oxy-chlorides to induce actinide precipitation, and promote metal corrosion to cause a failure of structural material. For these reasons, removal of O2- ions and monitoring of the O2- concentration in molten salt reactors are essential. In this study, methods using chemical and electrochemical methods were investigated for measuring the concentration of O2- ions in a molten salts. The acid-base neutralization reaction was used as a chemical analysis method. And electrochemical methods using the O2- diffusion limit current and YSZ (yttria stabilized zirconia) indicator electrode were used for measuring the O2- concentration. Finally, a modified method using porous membrane electrode was applied to monitor the O2- concentration. The O2- concentration was measured up to about 2wt% of Li2O by the method using the O2- diffusion current, up to about 4wt% by the YSZ indicator electrode, and about 6wt% by the porous membrane electrode in LiCl molten salts.

Treatment Technology for Contaminated Water Containing Iodine

Jei-Won Yeon,TaeJun Kim,Minsik Kim 한국방사성폐기물학회 2019 한국방사성폐기물학회 학술논문요약집 Vol.2019 No.10