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Discordance in Spirometric Interpretations Based on Korean and Non-Korean Reference Equations
Nami Kim,Mi-Hee Park,Se-yeong Kim,Chunhui Suh,Sangyoon Lee,Kun-Hyung Kim,Chae-Kwan Lee,Dae-Hwan Kim,Jong-Tae Lee 대한직업환경의학회 2013 대한직업환경의학회지 Vol.25 No.-
Objectives: Korean regression models for spirometric reference values are different from those of other ethnic groups. The purpose of this study was to evaluate discordance in spirometric interpretations based on using Korean reference equations versus non-Korean reference equations. Methods: Spirometry was performed on 825 Korean male workers from April 2009 to November 2011. The spirometric patterns and disease severity were evaluated using two Korean equations (Choi’s and Lee’s) and three equations for Caucasians (NHANES III, Morris’s, and Knudson’s), and the results of Choi’s equation were compared with the non-Korean equations. The spirometric patterns were defined as normal, restrictive, and mild and moderate obstructive. Results: The mean differences in the FEV1% and FVC% between the two Korean equations were 2.0 ± 1.3% and 3.5 ± 2.2%, respectively. Morris’s equation had the greatest difference in the FEV1% from Choi’s equation: 32.9 ± 8.5%. Knudson’s equation had the greatest difference in the FVC% from Choi’s equation: 10.5 ± 6.5%. Conclusions: The two Korean equations shared similar characteristics of spirometric interpretation. The spirometric interpretations of Choi’s equation were significantly different from those of Morris’s equation and Knudson’s equation.
Lee, Jiyoul,Chung, Jong Won,Kim, Do Hwan,Lee, Bang-Lin,Park, Jeong-Il,Lee, Sangyoon,Hä,usermann, Roger,Batlogg, Bertram,Lee, Sang-Soo,Choi, Insil,Kim, Il Won,Kang, Moon Sung American Chemical Society 2015 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.137 No.25
<P>We report the observation of band-like transport from printed polymer thin films at room temperature. This was achieved from donor-acceptor type thiophene-thiazole copolymer that was carefully designed to enhance the planarity of the backbone and the resulting transfer integral between the macromolecules. Due to the strong molecular interaction, the printed polymer film exhibited extremely low trap density comparable to that of molecular single crystals. Moreover, the energy barrier height for charge transport could be readily reduced with the aid of electric field, which led formation of extended electron states for band-like charge transport at room temperature.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2015/jacsat.2015.137.issue-25/jacs.5b04253/production/images/medium/ja-2015-04253w_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja5b04253'>ACS Electronic Supporting Info</A></P>
Effect of Various Pre-treatments on the Physicochemical Properties of Bracken
SangYoon Lee,Jiseon Lee,Soojin Kim,Jae-Hee Seo,Jung Gyu Lee,Dong-Hyun Park,Hee-Jung Choi,JingJing Bai,Eun Young Ko,Jung-Kue Shin,Ha-Yun Kim,Mi-Jung Choi 한국산업식품공학회 2016 학술대회 및 심포지엄 Vol.2016 No.10
In this study, we investigated the effects of different pre-treatment conditions such as blanching and drying process to improve its quality. Bracken samples were treated by drying (70°C for 40 min), blanching (100°C for 2 min) or mixed (blanched and dried [BD]), respectively. These treated samples were analyzed for their physicochemical properties such as pH, color and microbial growth. The pH of bracken increased from 6.6 to above 6.9 through all treatment. From color observation, the L* and b* values increased after drying process, whereas, the a* values decreased. Water contents of bracken decreased by about 80% from 93% through drying process. After samples treated by pre-treatments, hardness increased, especially after drying process. For the microbial study, raw bracken had 5.6 log CFU/g of aerobic bacteria and 2.8 log CFU/g of total coliform. Blanched and BD samples had about 2 log CFU/g of aerobic bacteria and 1.8 log CFU/g of total coliform, acceptable for food. From our results, it is concluded that the properties of blanched samples had similar to raw samples to guarantee for microbial safety. From the obtained results, the blanching process without drying process is necessary to apply freezing process as pretreatments.
Lee, Sangyoon,Park, Sungsik,Kim, Chang-Wan,Lee, Dongjin,Lee, Chongmu,Jin, Changhyun Elsevier 2016 THIN SOLID FILMS - Vol.598 No.-
<P><B>Abstract</B></P> <P>A hydrothermal-based synthesis technique was used to produce both amorphous and nano-grained NiO nanowires. The scanning electron microscopy images showed the morphologies before and after annealing treatment at 350 and 400°C for 2h. The microstructural features of the mixed amorphous and local crystalline in as-synthesized NiO and polycrystalline in annealed NiO were characterized by X-ray diffraction, transmission electron microscopy, and high-resolution transmission electron microscopy, respectively. The corresponding elemental compositions were determined via energy-dispersive X-ray. In addition, annealing-dependent effects on the photoluminescence spectra were observed in at least two different energy band regions, e.g., at ~395, 660, and 680nm. The photoluminescence properties, including intensity and energy, of the individual NiO nanowires varied significantly with microstructural changes arising from nickel and oxygen defects from annealing the as-synthesized amorphous NiO. The microstructural and optical origin of as-synthesized amorphous and annealed nano-grained NiO nanowires is discussed on the basis of the aforementioned results.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Amorphous and nano-grained NiO nanowires were synthesized. </LI> <LI> The structures have changed from amorphous to crystalline after annealing. </LI> <LI> The different PL properties may have resulted from annealing effects. </LI> </UL> </P>
Lee, Kwang-Hee,Lee, Gae Hwang,Leem, Dong-Seok,Lee, Jiyoul,Chung, Jong Won,Bulliard, Xavier,Choi, Hyeonho,Park, Kyung-Bae,Kim, Kyu-Sik,Jin, Yong Wan,Lee, Sangyoon,Park, Soo Young American Chemical Society 2014 The Journal of Physical Chemistry Part C Vol.118 No.25
<P>The dynamic characterization of two green-sensitive organic photodetectors (OPDs) using nonfullerene small molecules is investigated by analyzing the electrical parameters based on the experimental results and the simulated data. The two OPDs comprise <I>N</I>,<I>N</I>-dimethyl quinacridone (DMQA) as the common donor and dibutyl-substituted dicyanovinyl terthiophene (DCV3T) or boron-subphthalocyanine chloride (SubPc) as respective acceptors. At the applied voltage of −5 V, the device composed of DMQA/SubPc shows a higher frequency response at 148.3 kHz, by 55 kHz higher than the device based on DMQA/DCV3T. The impedance spectroscopy results indicate that the former device exhibits the low resistance due to the high mobility and the low capacitance linked to the dielectric constant. According to the molecular quantum calculation, the linear structure of DCV3T may promote packing of adjacent molecules in the linear direction, resulting in a high polarizability. In contrast, the fused structure of SubPc leads to a decrease in reorganization energy, and its conical shape tends to counterbalance the net dipole at the axial position in the dimer packing configuration owing to the symmetry of the three-branched units in the molecular periphery, which are related to the high carrier mobility and the low dielectric constant. The OPD comprising SubPc, with the dynamic response surpassing the commercialization level of 100 kHz, also exhibits good static performance with an external quantum efficiency of 60.1% at the wavelength of 540 nm, which can be an interesting candidate for potential applications as image sensors.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2014/jpccck.2014.118.issue-25/jp5028788/production/images/medium/jp-2014-028788_0008.gif'></P>
이시진(Sijin Lee),배상윤(Sangyoon Bae),이광원(Kwangwon Lee),이강인(Kangin Lee),이종훈(Jonghoon Lee) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
레이저를 이용하여 유기물 필름을 유기발광 다이오드(OLED) 기판에 입히는 방법에는 레이저 승화법(laser induced pattern-wise sublimation;LIPS)과 레이저 열전사법(laser induced thermal printing;LITI)이 있다. 이 두 방법에 사용하는 공여 기판에 대하여 공여기판과 수여기판 사이의 두께를 조절하면서 레이저 입사 시간에 따른 유기 필름의 승화와 OLED 기판에 부착된 유기 필름을 광학현미경, 형광현미경, 원자현미경을 이용하여 관측하고 유기물이 이동하는 과정을 분석하였다.
( Sangyoon Chung ),( Ja Seol Koo ),( Kwang Seok Kim ),( Chang Bum Bae ),( Ji Kyoung Lee ),( Joo Hee Park ),( Seung Young Kim ),( Jong Jin Hyun ),( Sung Woo Jung ),( Bora Keum ),( Beom Jae Lee ),( Yoon 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background/Aims: Immunomodulators such as azathioprine (AZA) and 6-mercaptopurine (6-MP) have been used for induction and maintenance treatment of Crohn`s disease (CD) and have effect on decrease of the steroid dose in active CD. The aims of study is to evaluate the predictive factors of response to AZA/6-MP in patients with moderate to severe CD. Methods: Among total 1,499 patients registered on Crohn`s cohort in Korea, 1,382 were enrolled in this study. The medical records including baseline characteristics, location and type of CD, complications, treatment agents, and surgical treatments were reviewed retrospectively. The patients with AZA/6-MP treatments were divided into two groups according to the additional treatments such as biologic agents and/or surgical treatment. Univariate and multivariate analyses were conducted to evaluate the predictive factors of clinical response to immunomodulators. Results: Among 1,382 patients with CD, AZA/6-MP treatment was used in 926 (67.0%). Between two groups according to AZA/6-MP treatment, the treatment group was younger than the other group (mean age, 25.8 vs 32.4, p<.001). AZA/6-MP treatment was used more frequently in patients with ileocolonic CD (62.5% vs 45.4%, p=.007) and with perianal disease (29.5% vs 21.0%, p<.001). In 926 patients with AZA/6-MP treatment, 376 (40.6%) were treated with biologic agents and/or surgical treatment. Between two groups according to the result of AZA/6-MP treatment, the disease locations were significantly different (p=.007), although the disease behaviors were not different. Multivariate analysis revealed that the disease location (p=.003) and age at diagnosis (p=.029) were significantly associated with AZA/6-MP treatment failure. Conclusions: AZA/6-MP treatment is effective on induction and maintenance treatment in CD. However, early biologic treatment should be considered in young age, colonic CD, since their AZA/6-MP treatment is less effective.