http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
문형규,최명석 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Tracing and analysing heavy metal ions rapidly are having great interests both environmentally and biologically. Among the metal ions, mercury ion optical sensing characteristics of waterborne polyurethane films doped with 5, 10, 15, 20-tetraphenylporphyrin(H<sub>2</sub>TPP) was investigated. Because of high fluorescence quantum yield and large Stokes shift, porphyrins have been used as fluorescing reagents for the determination of metal cations. Upon addition of Hg<sup>2+</sup>, the intensity of Soret-band decreased with red-shift in absorption spectrum and the fluorescence intensity reduced with increasing amount of Hg<sup>2+</sup>. We have investigated its interactions with other cations such as Na<sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, Zn<sup>2+</sup>, Co<sup>2+</sup>, Cu<sup>2+</sup>, Pb<sup>2+</sup>, Ni<sup>2+</sup>, Al<sup>3+</sup>, and Cr<sup>3+</sup> ions under identical experimental conditions.
문형규,이형복,김성용 더나은도시디자인포럼 2024 도시디자인저널 Vol.- No.6
본 연구의 목적은 대전광역시의 도시 이미지와 이를 반영하는 상징조형물의 현황과 방향성을 분석함에 있다. 이전, 시에서 시민들을 대상으로 대전의 도시이미지에 관한 설문 조사를 진행하였는데, 설문 결과 대전시는 과학 도시로서의 성향이 강했으며, 이는 연구자가 실시한 설문 조사에서도 유사하게 나타났다. 본 연구에서는 상징조형물의 유형을 분류하여 대전의 주요 상징조형물을 선정 및 조형물의 특징과 유형을 조사했다. 또한, 시민의식조사를 바탕으로 대전의 도시이미지와 상징조형물 인식 정도를 조사했다. 이를 통해, 대전시가 향후 제작할 도시이미지에 따른 상징조형물의 방향성에 관하여 고찰하고자 한다. The purpose of this study is to analyze the current status and direction of the city image of Daejeon Metropolitan City and the symbolic sculptures reflecting it. Previously, the city conducted a survey on the city image of Daejeon for citizens, and as a result of the survey, Daejeon City had a strong tendency as a science city, which was similar in the survey conducted by the researcher. In this study, the main symbolic sculptures of Daejeon were selected by classifying the types of symbolic sculptures, and the characteristics and types of sculptures were investigated. In addition, based on the survey on citizenship, the degree of recognition of the city image and symbolic sculptures in Daejeon was investigated. Through this, we would like to consider the direction of symbolic sculptures according to the city image that Daejeon City will produce in the future.
Synthesis, Characterization and Photophysical Study of Tetraphenylethylene-Porphyrin Conjugates
문형규,최명석 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
A series of tetraphenylethylene-porphyrin conjugates(1-3) were newly synthesized with Rothemund-Lindsey condensation and Fischer method. Compounds were characterized by UV-Vis absorption, fluorescence spectroscopy, Mass spectrometry, 1H-NMR and cyclic voltammetry. In UV-Vis spectra, results showed that each compound’s soret band and two Q bands were slightly red-shifted as TPE substituents increases. The fluorescence emission was also red-shifted, due to the increasing electron donation properties of TPE groups on meso-positions. Each compound’s HOMO-LUMO energies were also calculated by convertting the redox potentials acquired by cyclic voltammetry in which compound 3 showed cathodic shift of first oxidation potential value. We herein discuss in detail photophysical properties of tetraphenylethylene- Porphyrin conjugates.
직교하는 단락형 리브를 부착한 판형 열교환기 관내측 열유동 해석
이관수,문형규,정길완,Lee, Kwan-Soo,Moon, Hyoung-Kyu,Chung, Kilyoan 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.5
The purpose of this work is to Investigate the pressure drop and the heat transfer characteristics in the channel of plate heat exchanger with crossed-discrete ribs. The flow is assumed to be three-dimensional, laminar and periodically fully developed. Computations have been carried out for angles of attack from $0^{\circ}$ to $90^{\circ}$ and ratios of rib height from 0.15 to 0.46 for various values of Reynolds and Prandtl numbers. The heat transfer was improved by inclined ribs generating helical vortices and secondary flows. The results show that the pressure drop has a maximum value at $70^{\circ}$ and the heat transfer has a maximum value at $45^{\circ}$. As the rib height increases, the pressure drop and the heat transfer increase quadratically, and the increasing rate of pressure drop is higher than that of the heat transfer. As Reynolds number increases, the pressure drop increases in proportion to the square of Reynolds number and the heat transfer increases linearly.