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분광광도법에 의한 칼라 렌즈 내 염색제에 대한 흡광도 분석
최은정,정주현,Choi, Eun-Jung,Jung, Ju-Hyun 대한화학회 2009 대한화학회지 Vol.53 No.6
분광광도법으로 칼라렌즈 내 염색제에 대한 흡광도를 연구하였다. 사용된 렌즈와 염색제는 각각 CR-39 플라스틱 광학렌즈와 Ons & $Lavas^{(R)}$의 Blue 1800 이다. 칼라렌즈 내 염색제의 흡광도는 칼라렌즈와 CR-39 렌즈의 흡광도의 차를 이용하여 구하였으며, 염색제의 평균농도는 칼라렌즈와 CR-39 렌즈의 질량차로부터 구하였다. 칼라렌즈에 침투된 염색제에 대하여도 흡광도와 평균농도 사이에 Beer 법칙이 성립하였고, 검정선의 기울기로부터 흡광계수는 a=0.983 $Lg^{-1}cm^{-1}$임을 알아내었다. We studied absorbance of tinted dye absorbed into tinted lenses by Spectrophotometric method. Used lenses and tinted dye were CR-39 plastic optical lenses and Ons & $Lavas^{(R)}$ Blue, respectively. Absorbance values of tinted dye absorbed into tinted lenses were obtained from the differences of absorbance values between tinted lenses and CR-30 lenses. Average concentrations of tinted dye absorbed into tinted lenses were obtained from the mass differences between tinted lenses and CR-30 lenses. The relationship between absorbance and average concentration for tinted dye absorbed into tinted lenses was also confirmed to follow Beer’s law. The absorption coefficient calculated from the tangent of the calibration curve was determined to be a=0.983 $Lg^{-1}cm^{-1}$.
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이충희 한국물리학회 2011 새물리 Vol.61 No.3
Functional optical imaging is a new imaging technique developed recently and can with minimal or no invasion obtain activated brain images arising from the hemodynamic response. The state of the art in brain science research and optical imaging of brain signal is reviewed. In addition R&D results and patents on optical imaging and functional near-infrared spectroscopy (fNIRS)related to the brain-activated hemodynamic response and obtained in major countries, including the United States, the European Union, Japan and Korea, are presented, and the technological levels of brain science research and optical imaging are evaluated. Finally, the future outlook for progress in brain science and optical imaging is provided. In this paper, the principles of optical imaging of an intrinsic signal and a voltage-sensitive dye (VSD), 3D optical imaging of blood volume and oxygenation in the neonatal brain, and fNIRS, as well as their applications in brain science,are presented. 뇌과학 연구와 기능적 광학영상기술의 국내외 연구개발 동향, 학술정보및 기술특허 분석을 통하여 미국, 유럽, 일본, 한국 등 주요국의 뇌과학연구와 기능적 광학영상기술 수준을 평가하고, 신경신호의 광학영상기술의 당면과제와 발전방향을 제시하였다. 본 논문에서는 내재성신호(intrinsic signal)의 광학영상, 전압에 민감한염료(voltage-sensitive dye, VSD)에 의한 광학영상, 신생아 뇌의혈액부피와 산소결합의 3차원 광학영상, 기능적근적외선분광학(functional Near Infrared Spectroscopy, fNIRS)영상기법과 이들 기술의 응용에 대하여 기술하였다. 주요국의 뇌과학연구와 기능적 광학영상기술 수준은 미국이 압도적으로 우세하여1위이며, 다음은 유럽, 일본, 한국 순이다. 한국은 기능적 광학영상기술연구개발, 발표 논문 및 특허에 있어 가장 열세이다.
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황성진(Hwang, Seongjin),정현상(Jung, Hyunsang),전재승(Jeon, Jaeseung),김형순(Kim, Hyungsun) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
Dye-sensitized solar cells (DSSC) show great promise as an inexpensive alternative to conventional p-n junction solar cells. Investigations into the various factors influencing the photovoltaic efficiency have recently been intensified. The conventional absorber electrode in DSSC is composed of compacted or sintered TiO₂ nanopowder that carries an anchored organic dye. The absorbance of incident light in the DSC is realized by specifically engineered dye molecules placed on the semiconductor electrode surface (TiO₂). The dye absorbs light at wavelengths up to about 920nm, the energy of the exited state of the molecule should be about 1.35eV above the electronic ground state corresponding to the ideal band gap of a single band gap solar cell. The dye molecules ar adhered onto the nanostrutured TiO₂ electrode by immersing the sintered electrode into a dye solution, typically 3mM in alcohol, for a long enough period to fully impregnate the electrode. However, the concentrations of the dye is slightly changed due to the evaporation of the alcohol. The dye is more expensive than other materials in DSSC and related to the efficiency of DSSC. Therefore, the concentrations of the dye should be carefully measured. In this study, we investigated to the dye loading on fired TiO₂ powder as a function of temperature by the TG-DTA and the dye solution by UV-visible spectroscopy after the impregnation process. The dye loading is related to the porosity of the nanostructured TiO₂ electrode.
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키틴의 염료 흡착에 의한 염액의 색소제거에 관한 연구 (제1보)
유혜자,이혜자,이전숙 한국의류학회 2000 한국의류학회지 Vol.24 No.3
The adsorption ability of dyes on chitin, a natural polymer was investigated for decolorization of dye wastewater. Chitin was manufactured in lab by decalcification in dilute aqueous HCl solution and deproteination in dilute aqueous NaOH solution with shrimp shells. Absorbance of residue solution of dyebaths after dye adsorptions of chitin were measured in varieties of dye concentration and dipping periods. Four kinds of dyestuffs were used, C.I.Acid Blue 29, C.IDirect Blue 6, C.I.Reactive Orange 12 and C.I.Basic Red 18. When chtin ig was dipped in 0.05% of dyebath with stirring, maximum adsorption ratio of each kind of dyes was exhibited as 91.6% for C.I.Acid Blue 29, 95% for C.I.Direct Blue 6, 58.2% for C.I.Reactive Orange 13 and 75.8% for C.I.Basic Red 18. It shows that chitin has better adsorption abilities of ionic dyes of acid, direct and basic dye than non-ionic reactive dye. And chitin has better adsorption abilities of anionic acid and direct dyes than cationic basic dye because of the presence of nitrogen atoms. All kinds of dyestuffs used showed speedy absorption effects by chitin, so chitin can absorb much amount of dyes in 5 mimutes reach to equilibrium of adsorption in 2 hours after dipping. Basic dye was absorbed the most speedily in 5 minutes, although maximum adsorption ratio is not high. That reason can be thought that chitin surface is essentially negatively charged due to polar funtional groups.
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