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전옥철,최재곤 조선대학교 생산기술연구소 1998 生産技術硏究 Vol.20 No.1
A new semirigid liquid crystalline polyester(LCP) was synthesized by polycondensation of 2,6-naphthalenedicarbonyl dichloride with the corresponding diol having a hexamethylene group. Blends composed of poly(ethylene 2,6-naphthalate, PEN) were prepared by the coprecipitation from a common solvent. The thermal. mechanical properties and morphology of blends were examined using differential scanning calorimeter(DSC), scanning electron microscope(SEM), and dynamic mechanical thermal analyzer(DMTA). The glass transition ternperature(T_(g)) and the cold crystallization ternperature(T_(c)) of the PEN in the blends decreased with increasing the content of LCP and the LCP acted as a nucleating agent for the matrix polymers. The LCP phases in the blends were found to be finely and uniformly dispersed by SEM micrographs. The modulus of LCP/PEN blends were enhanced on the LCP content increase.
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전옥철,김윤준,류범영,최재곤,조병욱,홍진후 조선대학교 생산기술연구소 1999 生産技術硏究 Vol.21 No.1
A series of wholly aromatic polyesters with side chains were synthesized by solution polycondensation from 2,5-dialkoxyterephthaloyl chlorides with the corresponding diol. The polymers showed the schlieren textures which is indicative of a nematic phase above their melting temperature. The inherent viscosities (η_(inh)) measured at 35℃ in phenol/p-chlorophenol/1,1,2,2-tetrachloroethane were 0.56-0.98 dℓ/g. The glass transition temperature (T_(g)) and melting temperature (T_(m)) decreased with increasing the length of the alkoxy side chain. Initial decomposition temperatures in TGA occurred at 338 ~ 363℃ in N₂ gas and thermal stability of polymers decreased with increasing the length of the side chain.
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全玉河 朝鮮大學校 1977 綜合論文集 Vol.1977 No.-
블라우스 한장을 제작하는데에 필요한 시간을 가격으로 환산한다면 도저히 기성의류품에 승부를 겨룰 수가 없을 것 같다. 이와 같은 사회적 배경 속에서 대학에 있어서의 피복교육도 그 내용이 바꿔져야 할 것이다. 곧 가정주부가 되어 직면할 문제 즉 생활필수품은 모두가 주부 자신의 손에서 이루어지는 것이 아니기 때문에 시판되어 있는 상품을 어떻게 잘 이용하는가에 따라 소비적 입장에서의 관리기술도 중요한 요인의 하나라고 생각한다. 따라서 소비생황에도 대처할 수 있는 지도를 해나가는 것도 필요하다. 젊은 연령층에 있어서는 기성의류품을 매력적으로 생각하고 있지만 아직도 고연령층에 있어서는 이용하는 사람이 적은 것 같다. 이러한 원인으로 볼 수 있는 것은 한복을 주로 입는 고연령층과 맞춤옷, 가정양재 등의 분야가 상당히 있다는 배경 그리고 직접적으로는 기성복 업계 자신의 문제 즉 체형형 사이즈의 부족과 기업이 목표로 한 메이커가 젊은 사람 위주로 기울어져 있다는 면, 소매점의 판매정책의 문제 등 여러가지를 들 수 있다. 이러한 문제를 소비자의 소리의 하나로 기업측에 호소하여 업계로 하여금 재고의 기회를 가져 다종 다양한 상품을 제작 시판함으로써 기성복을 원하는 사람들이 보다 합리적인 의생활을 하는데 도움이 되었으면 한다.
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全炳基,崔玉植 嶺南大學校附設 基礎科學硏究所 1981 基礎科學硏究 Vol.1 No.-
This paper show that the nucleon form factor can be obtained from dispersion relation and the calculation of absorption part and the obtained form factor formula fits to the recent experimental results.
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문전옥,김태완,백기주,김기헌 부산대학교 신약개발연구소 1994 藥學硏究誌 Vol.28 No.1
It was reported that hepatic aldehyde dehydrogenase(ALDH) activity was depressed in alcoholic liver diseases, however there was few report that explain the reason of depressed ALDH activity. We have attempted to correlate the decrease of hepatic ALDH activity with the active oxygen species which generated at elevated rates in the proliferated microsomes by chronic ethanol feeding. The susceptibilities of the hepatic ALDH activity to active oxygen generated by xanthine-xanthine oxidase system and FeSO₄-H₂O₂ system were studied. Incubation of ALDH with 2×10³ xanthine oxidase for 30 min at 25℃ resulted in the decrease of enzyme activity to 60%, and 55% of ALDH activity was retained after exposure to FeSO₄4-H₂O₂ system for 20 min. Alteration in the ALDH activity after administration of ethanol in rat liver was investigated. Whereas the mitochodrial ALDH activity was increased, the microsomal activity was depressed in ethanol-treated rat. Induced microsomal ALDH activity was observed by treatment of phenobarbital or 3-methylcholanthrene in the liver of rats chronically fed alcohol. Since the ALDH catalyses the oxidation of a wide variety of aliphatic and aromatic aldehydes, it is suggested that the alteration in the ALDH activity by various factors including the active oxygen affects the physiological states of liver administrated ethanol chronically, which may in turn to lead to liver disease.
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문전옥,양정화 부산대학교 신약개발연구소 1995 藥學硏究誌 Vol.29 No.2
We produced in vivo hepatitis in rat by applying hepatotoxicants such as CCl₄, allyl alcohol, galactosamine and phenobarbital. Then we focused on the alterations of the microsomal P450 activity, TBA reactive substances, the content of non-protein SH and the activities of alcohol dehydrogenase and aldehyde dehydrogenase in rat liver. Whereas the ADH activity was not altered except in the case of CCl₄, the mitocondrial and microsomal ALDH activities were decreased by the treatment of the hepatotoxicants and it was consistent with the increase of TBA reactive substances formation and the decrease of the non-protein SH content.
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Cytochrome P-450유도가 간세포의 지질과산화와 산소소비에 미치는 영향
문전옥 부산대학교 신약개발연구소 1993 藥學硏究誌 Vol.27 No.1
The reates of the NADPH-dependent oxygen consumption by the liver S-9 mixture and microsomes were determined. The rates by the liver S-9 mixture and microsomes from phenobarbital pretreated rats were 9-12 times and 2.4-2.9 times higher than rates by the liver S-9 mixture and microsomes from non-treated rats, respectively. Pretreatment with phenobarbital increased the thiobarbituric acid reactive substances formation and the NADPH oxidation in the liver compared with the non-treated rats. On the other hand, the rates of the NADH-dependent oxygen consumption decreased in the liver S-9 mixture and microsomes from phenobarbital pretreated rats and it is consistent with oxidation of NADH. Neverthelese, the NADH-dependent formation of TBA reactive substances in the liver S-9 mixture and microsomes increased in phenobarbital pretreated rats. These results suggest that alteration in the liver microsomal component such as cytochrome P-450 and cytochrome P-450 reductase effects on the oxygen consumption by autooxidation in the liver and lipid peroxidation of the liver.
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