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설파디아진계 항균성 아조 분산염료의 합성 및 폴리에스터에 대한 염색성 연구
김민세,조용균,오사랑,염기철,김상천,이주연,김형주,고준석 한국섬유공학회 2023 한국섬유공학회지 Vol.60 No.1
Sulfadiazine, an antibacterial agent, was used in combination with the differentcoupling components to synthesize three sulfadiazine-based azo disperse dyes with antibacterialproperties. The chemical structures of the synthesized dye were verifiedusing FT-IR spectroscopy and 1H-NMR analysis, and the spectral properties of the dyeswere analyzed using a UV-Visible spectrophotometer. Among the synthesized azo dispersiondyes, the more hydrophobic dye exhibited superior build-up properties on PET fabrics. The colorfastness of PET fabrics dyed with the synthesized dyes showed excellent colorfastness to washing, perspiration, and rubbing. An analysis of the antibacterial propertiesof S. aureus and K. pneumoniae revealed that there was no significant antibacterial activitycompared to that of undyed PET. However, a dyeing with a higher concentration of a particulardye produced an increase in antimicrobial properties.
김민세,안병구 한국인터넷방송통신학회 2012 한국인터넷방송통신학회 논문지 Vol.12 No.5
현재 유료 동영상 콘텐츠는 보안 취약점을 이용하여 제 3자가 취득할 수 있는 문제점이 있다. 본 연구에서 는 제3자의 위법적인 다운로드를 차단하기 위하여 상용화되어 사용 중인 동영상 암호화 방식을 분석하였다. 그리고 기존에 있던 방식인 주소 암호화 방식과 암호화 프로토콜을 사용하는 방식에 추가하여 프로그램 자체에서 암호화 및 복호화를 하여 송, 수신하는 방식을 제안하였다. 성능평가를 위해서 암호화를 통한 인코딩과 디코딩 지연시간을 최대한으로 줄이면서 보안 향상을 이룰 수 있는지를 가지고 기존의 방식과 비교 분석하였다. Since current paid video contents have a security vulnerability, anyone can obtain the information of video contents. In this paper, we analyze current video encryption methods which are used commercially to prevent illegal downloading movies. And we propose an address encryption method which can encrypt and decrypt video contents in program itself. In the performance evaluation, we compare the proposed method with the conventional method to show the improvement of security with the reduced delay for encoding and decoding through encryption.
유라실아조계 항균성 분산염료 구조를 도입한 폴리우레탄의 합성 및 물성 연구
조용균,김민세,오사랑,염기철,김상천,이주연,김형주,고준석 한국섬유공학회 2023 한국섬유공학회지 Vol.60 No.1
Two uracil-based antimicrobial azo disperse dyes were synthesized using 6- aminouracil and 6-amino-1,3-dimethyluracil as diazo components, and they were incorporated to the backbone of polyurethane to synthesize antimicrobial polyurethane. The chemical structures of the synthesized dyes and polyurethanes were confirmed through FT-IR and 1H-NMR analysis, and their molecular weight, contact angle and thermal degradation were examined using GPC, TGA, contact angle measurement device, respectively. The fibrous membrane structure of the electro-spun polyurethane membranes were confirmed by FE-SEM, and their antibacterial test results showed excellent antimicrobial activity against Staphylococcus aureus and Escherichia coli. However, the color intensity of polyurethane containing a uracilazo dye moiety in its backbone was found to be poor due to its inherently low molar absorption coefficient.
오사랑,오나현,염기철,김민세,고준석 한국섬유공학회 2023 Fibers and polymers Vol.24 No.5
Herein, two spironaphthoxazine-based photochromic dyes are synthesized and their dyeing, fastness, and photochromicproperties on nylon fabric are investigated. A novel performance indicator, the photochromic efficiency index (PEI), is proposedto assess the photochromic performance of the synthesized spironaphthoxazine dyes. Using the PEI, the parametersaffecting dyeability and photochromic performance are optimized for efficient photochromic performance, and a pH of 9and temperature range of 80–90 °C are determined as the optimal dyeing conditions. Evidently, 1,4-diazabicyclo [2.2.2]octane improves photocoloration efficiency by inhibiting thermal oxidative degradation via singlet oxygen quenching. Thedye containing a hydroxyl group achieves higher buildup and photochromic performance on the nylon fabric owing to itsincreased affinity in terms of polarity and hydrophilicity. The synthesized dyes exhibit reasonable buildup and photocolorationproperties on nylon fabric, in addition to excellent color fastness to washing, rubbing, and perspiration.
금나노입자-DNA Probe를 이용한 아프리카돼지열병(ASFV) 조기 진단 시스템
박지연,안유림,최재원,안희원,김민세,김학선,이은진,강정택,김현욱 한국생물공학회 2022 KSBB Journal Vol.37 No.4
African swine fever virus (ASFV) is a DNA virus epidemic disease that is known to have a fatality rate of close to 100% when infected. Because there is no vaccine for ASFV, early diagnosis that can be quickly checked in the field is very important. Also, it is known that the colloid solution has a colorimetric color because gold nanoparticles have a specific wavelength in the visible light region. When the wavelength is changed due to the aggregation or shape of the gold nanoparticles, the colorimetric of the solution is also changed. So, we use gold nanoparticles-DNA Probe-ASFV combination for efficient early diagnosis of ASFV. After binding the DNA probe to the gold nanoparticles using a poly A base, ASFV of the complementary sequence is bound. And the reaction is performed according to temperature, volume, and time. Gold nanoparticles were characterized by DLS, TEM, and microplate readers. The detection of ASFV using a gold nanoparticle-DNA probe that shows a convenient and quick reaction can be visually confirmed through colorimet- ric change without on-site equipment, and is an effective tool for early diagnosis of disease.