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유제안,김진우 한국섬유공학회 1993 한국섬유공학회지 Vol.30 No.3
A research was performed to improve the treatment of waste water from dyeing factories by biological method. Some strains were separated from activated sludge and the superior strain which decolourize some auto dyes was used for this study. The strain was cultivated on two type of culture medium that contains three azo dyes, and the characteristics of strain was investigated. The separated superior strain was identified to Klebsiella oxytoca classified as gram-negative facultatively anaerobic rods in Bergey's manual, and decolourization rate of three azo dyes was discussed. Dye concentration decreased as strain grew. Dyes in nutrient sufficient culture medium was decclourlzed by Klebsiella oxyteca faster than those in nitrogen limited culture medium. As the evidence of transformation of strain, plasmid were separated from Klebsiella oxytoca. From IR spectra of precipitates in medium after culture, it could be assumed that the mechanisms of decolourization were deformation or adsorption of dyes by micro-organism.
양모케라틴 막의 염료투과성 및 의료용고분자로의 응용(I) -S-시아노에틸화 케라틴의 혈액 적합성-
유제안,김영주,김진우,Yu, Je-An,Kim, Yeong-Ju,Kim, Jin-U 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.6
The blood compatibility of S(sulfur)-cyanoethylated keratin(SCEK) was studied. SCEK was obtained by rupture the cystine linkage of wool keratin followed by cyanoethylation. Platelet count, prothrombin time and activated partial thromboplastin time were measured by Coulter counter to investigate the behavior of blood on the surface of SCEK and other four synthetic materials. Enzyme linked immuno sorbent assay was adopted to measure platelet factor IV released from agranule in platelet. The contact an히e and gas permeation rate of SCEK were also measured.
폴리에스테르 극세사 직물의 코로나 방전 및 저온플라즈마 처리에 의한 농색화 가공
유제안,김진우 한국섬유공학회 1993 한국섬유공학회지 Vol.30 No.12
Poly(ethylene terephthalate)(PET) fiber reflects a large quantity of light from the surface of the fiber. Because it's refractive index is greatly different from that of air. So in case of dyeing dark shade by black or other dolors. It is difficult to obtain full shade. Especially the micro fiber is very hard to obtain dark shade due to its large surface area, which reflects the most of incident lights. The low temperature 02 plasma or the corona discharge treatment was performed to obtain the dark shade by etching and to observe the effect of solvent pretreatment and consequential change of the degree of crystallization. Dimity Dramamine(DMF) treatment was carried out before etching. As the result of plasma or corona etching, the dark shade was obtained in dyeing. With increasing the solvent pretreating time, the ratio of weight loss and difference of lightness value(△L) were increased. As the denier of fiber decreased, the ratio of weight loss and AL were increased. The solvent pretreated PET was easily etched for its modified structure resulted from DMF treatment.
양모 케라틴 막의 염료투과성 및 의료용 고분자로의 응용(II) 양모 케라틴 유도체의 효소분해
유제안,김진우 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.11
5 (sulfur)fyanoethylated keratin(SCEK), 5 (sulfur) arboxymethylated keratin(SCU) , and highcycine-tyosine keratin(HGTK) was made firm wool-keratin using nucleophilic substitution after reduction. Amino acid analysis, electrophoresis, and DSC etc. were conducted to measure the molecular weights amino acid compositions and another properties of three wool-keratin derivatives. Biodeadation behavior of these keratin derivatives was also examined in vitro by means of enzymaticestion. Two protease(papain and trypsin) were used to perform the enzymatic hydrolysis. Tensile properties of hydrolyzed keratin were measured.
양모 케라틴 막의 염료투과성 및 의료용 고분자로의 응용(III) -S-시아노에틸화 케라틴 막의 아미노산 조성 및 저분자 투과성-
유제안,김진우 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.12
Sfyanoethylated wool-keratin(SCEK) was prepared firm wool by deduction and cyanoethylation method. The reduction of cystine linkage was performed with 2-mercaptoethanol in urea solutions and cyanoethylation was completed with acrylonitrile. IR, amino acid analysis and Kieldhal methods were adopted to monitor the reaction. SCEK membrane was made by snivent casting of f)tic acid on a teuton casting plate. The dialsion of acid dyes into SCEK membrane was measured to investigate the small molecule permeability of wool keratin derivative. Differsion coeffecient of dyes of hydrophobic structure was lower than that of hydrophilic dyes. Vapor phase cyanoethylation of wool fabrics was performed. The deeper color was obtained firm the vapor phase cyanoethylated wool fabrics than ordinary wool with 5 types of dyes excluding the acid dye.
아조계 분산염료의 알칼리 가수분해(IV)-헤테로환 아조염료의 알칼리 가수분해 반응 메카니즘-
박건용,유제안 한국섬유공학회 1993 한국섬유공학회지 Vol.30 No.7
Alkaline hydrolysis reaction of heterocyclic auto disperse dyes was discussed and reaction mechanism was proposed. The FT-IR spectra of auto dye derived from dichlorobenzothiazole and its hydrolysis product were almost the same suggesting the dye was stable for alkali. However, auto dyes derived from nitrothiazole and dinitrothiophene were very rapidly hydrolyzed by alkali with large hypsochromic and hypochromic shifts. Their hydrolyzed products were water-soluble and different from those of the original dyes. Molecular weights of the hydrolyzed products were about half of those of the original dyes. Their hydrolysis mechanism may be explained by the rapid nucleophilic attack of OH- on the carbon adjacent to auto group, electron density of which decreased due to the strong electron-withdrawing group such as vitro group.