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김동은 한국생물공학회 2004 Biotechnology and Bioprocess Engineering Vol.9 No.1
Escherichia coli transcription termination factor Rho catalyzes the unwinding of RNA/DNA duplex in reactions that are coupled to ATP binding and hydrolysis. Fluorescence stopped-flow methods using ATP and the fluorescent 2'(3')-O-(N-methylanthraniloyl) derivatives (mant-derivatives) of ATP and ADP were used to probe the kinetics of nucleotide binding to and dissociation from the Rho-RNA complex. Presteady state nucleotide binding kinetics provides evidence for the presence of negative cooperativity in nucleotide binding among the multiple nucleotide binding sites on Rho hexamer. The binding of the first nucleotide to the Rho-RNA complex occurs at a bimolecular rate of 3.6 106 M-1 sec-1, whereas the second nucleotide binds at a slower rate of 4.7 105 M-1 sec-1 at 18oC. RNA complexed with Rho affects the kinetics of nucleotide interaction with the active sites through conformational changes to the Rho hexamer, allowing the incoming nucleotide to be more accessible to the sites. Adenine nucleotide binding and dissociation is more favorable when RNA is bound to Rho, whereas ATP binding and dissociation step in the absence of RNA occurs significantly slower, at a rate 70- and 40-fold slower than those observed with the Rho-RNA complex, respectively.
Zn(HPB)<sub>2</sub>를 Hole Blocking Layer로 이용한 OLEDS의 특성 연구
김동은,김두석,이범종,권영수,Kim, Dong-Eun,Kim, Doo-Seok,Lee, Burm-Jong,Kwon, Young-Soo 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.12
Recently, organic light emitting diodes(OLEDs) is widely used as one of the information display techniques. We synthesized 2-(2-hydroxyphenyl)benzoxazole($Zn(HPB)_2$). We studied the luminescent properties of OLEDs using $Zn(HPB)_2$. The ionization potential(IP) and the electron affinity(EA) of $Zn(HPB)_2$ investigated using cyclic-voltammetry(C-V). The IP and EA were 6.5 eV and 3.0 eV, respectively. The PL and EL spectra of $Zn(HPB)_2$ were observed at the wavelength of 450 nm. We used $Zn(HPB)_2$ as an emitting layer and hole blocking layer. At the experiment about hole blocking effect, we inserted $Zn(HPB)_2$ between emiting material layer(EML) and cathode, and between hole transport layer(HTL) and emitting material layer(EML). We measured current density-voltage and luminance-voltage characteristics at room temperature.
김동은 복식문화학회 2015 服飾文化硏究 Vol.23 No.4
The apparel industry has recently been recognizing the important target market of middle-aged women. The aim of this study was to examine the anthropometric characteristics of US women of 46 to 65 years of age and identify distinctive body shape characteristics of US middle-aged women. A total of 1915 middle-aged women whose ages ranged from 46 to 65 were selected from the SizeUSA database. The age range was divided into two groups: 46-55 and 56-65. Twenty-four body measurements important for apparel development were chosen. Four factors—Girth Factor, Height Factor, Hip Drop Factor, and Bust Drop Factor—accounted for the US middle-aged women’s body measurements. The body shapes were classified into four body shapes, which were Y-Shape in the overweight range, S-Shape in the overweight range, H-Shape in the overweight range, and the A-Shape in obese range. H-Shape, which was the least-defined waist in relation to the bust and hips with a short height, existed more in older middle-aged women than in younger middle-aged women. Y-Shape, S-Shape, and A-Shape existed more in the group of younger middle-aged women than in the group of older middle-aged women. In addition, compared with the younger middle-aged women, older middle-aged women had narrower shoulders, a larger waist, thinner legs, and a longer distance between side neck to bust point. The findings from the current study may be applied in the apparel industry for developing clothing sizing systems for US middle-aged women.
김동은,서동구,권영진 한국방재학회 2013 한국방재학회논문집 Vol.13 No.3
As a result of experimenting 6 loading combustibles in domestic residential facilities by using Furniture Calorimeter, values of 2,391.26 kW were appeared from sofa, 1,891.80 kW from drawer, 1,778.95 kW from mattress, 1,104 kW from chair, 291 kW from desk, and 135.09 kW from TV. Also, if applying α value of fire growing rate by classifying fire- growing speeds at NFPA 72(National Fire Alarm Code 2007, Annex B), mattress can be defined as Ultra-Fast, sofa and drawer Fast, TV Slow, desk Slow, and chair Medium. 화재성상예측에 필요한 기초 DATA확보를 위하여 Furniture Calorimeter실험을 통하여 가연물의 연소특성 DATA를 확보하고 이를 국내에 적용 가능한 DATA BASE정립방안 제시를 목적으로 연구를 수행하였으며, 실험대상은 국내 주거시설에서의 적재 가연물 6개를 선택하여 Furniture Calorimeter실험결과 소파는 2,391.26 kW, 서랍장 1891.80 kW, 매트리스 1,778.95 kW, 의자 1,104 kW, 책상 291 kW, TV 135.09 kW의 결과값이 측정되었으며, 이를 NFPA72(National Fire Alarm Code 2007, AnnexB)에서 제시하고 있는 가연물 화재성상속도로 분류하여 화재성장율 α값을 적용하여 분류하였다. 이를 통하여 매트리스는 Ultra- Fast, 소파와 서랍장은 Fast, TV는 Slow, 책상은 Slow, 의자는 Medium의 결과값을 도출하였다.
김동은,이은정,김정선,장우남,임선규 대한신경치료학회 2017 신경치료 Vol.21 No.1
Purpose This study aimed to examine the effect of exercise on static and dynamic balance in children with cerebral palsy (CP) using a Swiss ball. Methods The subjects(n=7) underwent the Independent Standing Time and Modified Timed Up and Go tests before and after one treatment session with a Swiss ball. We compared these data to specifically determine the effect of the intervention without it being influenced by other variables. Results We found a significant increase (p<0.05) in the Independent Standing Time with eyes opened and closed after the intervention. We also found a significant difference between the Modified Timed Up and Go test before and after intervention. Conclusion Thus, exercise with a Swiss ball can improve static and dynamic balance in subjects with CP diplegia.