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Optical anisotropy in single-walled carbon nanotubes.
Yoo, Seongwoo,Jung, Yongmin,Lee, Dong Soo,Han, Won-Taek,Oh, Kyunghwan,Murakami, Y,Edamura, T,Maruyama, Shigeo Optical Society of America 2005 Optics letters Vol.30 No.23
<P>Optical anistropy at optical communication wavelength was observed in films of vertically aligned single-walled carbon nanotubes (SWNTs). We report the control of both the polarization state and transmission of incoming light at 1550 nm by azimuthal and axial tilting of SWNT film about its aligned axis. The experiments reveal that the polarization state of light is susceptible to the azimuthal angle of the aligned direction of a SWNT having semiconductor characteristics and the intensity of the output beam after SWNT film shows cosine function dependence on the axial tilting angle.</P>
Rapid exacerbation of renal function after administration of hydroxyethyl starch in a dog
BAE, Junwoo,SOLIMAN, Mahmoud,KIM, Hyunwoo,KANG, Seongwoo,KIM, Woosun,AHN, Soomin,CHO, Kyoungoh,CHOI, Jihye,KIM, Suhee,PARK, Jinho,KIM, Sangki,DO, Yoonjung,YOO, Jaegyu,YU, Dohyeon JAPANESE SOCIETY OF VETERINARY SCIENCE 2017 The Journal of veterinary medical science Vol.79 No.9
<P>Hydroxyethyl starches (HES) are commonly used synthetic colloidal solution in veterinary medicine. Despite of possible adverse effect to kidney injury in human, there is no report about nephrotoxic effects of HES in dogs. HES was administered to a Golden retriever (4-year-old, intact male) with ascites in order to increase plasma osmolality. Initially, the dog was mild azotemic, however, kidney function was rapidly deteriorated after several days of HES administration. Finally, histopathological examination revealed remarkable osmotic nephrosis. In the case reported herein, acute kidney injury was remarkably developed after HES administration. Clinical and histopathologic findings of acute kidney injury support nephrotoxic effects of HES to a dog.</P>
The Prognostic Implication of Metabolic Syndrome in Patients with Heart Failure
윤현주,안영근,김계훈,박종춘,최동주,Seongwoo Han,전은석,조명찬,Jae-Joong Kim,Byung-Su Yoo,신미승,성인환,Seok-Min Kang,Yung-Jo Kim,Hyung Seop Kim,채성철,오병희,Myung-Mook Lee,유규형 대한심장학회 2013 Korean Circulation Journal Vol.43 No.2
Background and Objectives: Metabolic syndrome (MetS) increases the risk of heart failure (HF). The purpose of this study was to identi-fy the prevalence of MetS in patients with HF and determine the syndrome’s association with HF in clinical and laboratory parameters. Subjects and Methods: A total of 3200 HF patients (67.6±14.5 years) enrolled in a nationwide prospective Korea HF Registry between Jan. 2005 and Oct. 2009. Patients were divided into two groups according to the presence or absence of MetS at admission: group I (pres-ence, n=1141) and group II (absence, n=2059). Results: The prevalence of MetS was 35.7% across all subjects and was higher in females (56.0%). The levels of white blood cells, platelets,creatinine, glucose, and cholesterol were significantly higher in group I than in group II. Left ventricular dimension and volume was smaller and ejection fraction was higher in group I than in group II. An ischemic cause of HF was more frequent in group I. The rates of valvular and idiopathic cause were lower in group I than in group II. The rate of mortality was lower in group I than in group II (4.9% vs. 8.3%, p<0.001). Conclusion: Despite the increased cardiovascular risks in MetS, MetS was found to be associated with decreased mortality in HF.
Regenerative Er-doped Fiber Amplifier System for High-repetition-rate Optical Pulses
Yan Liu,Kan Wu,Nanxi Li,Lanling Lan,Seongwoo Yoo,Xuan Wu,Perry Ping Shum,Shuguang Zeng,Xinyu Tan 한국광학회 2013 Current Optics and Photonics Vol.17 No.5
A regenerative Er-doped fiber amplifier system for a high-repetition-rate optical pulse train is investigated for the first time. A signal pulse train with a wavelength tuning range of 18 nm is produced by a passive mode-locked fiber laser based on a nonlinear polarization rotation technique. In order to realize the amplification, an optical delay-line is used to achieve time match between the pulses’ interval and the period of pulse running through the regenerative amplifier. The 16 dB gain is obtained for an input pulse train with a launching power of -30.4 dBm, a center wavelength of 1563.4 nm and a repetition rate of 15.3 MHz. The output properties of signal pulses with different center wavelengths are also discussed. The pulse amplification is found to be different from the regenerative amplification system for CW signals.