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Han, J.,Won, E.J.,Hwang, U.K.,Kim, I.C.,Yim, J.H.,Lee, J.S. Elsevier Science 2016 COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLO Vol.185 No.-
Triclosan (TCS) and Triclocarban (TCC) are used as antimicrobial agents and have been widely dispersed and detected in the marine environment. However, the toxicities of TCS and TCC have been poorly investigated in marine invertebrates. In this study, the effects of TCS and TCC on mortality, population growth, lifespan, and fecundity were examined in the monogonont rotifer (Brachionus koreanus) using cellular ROS levels, GST enzymatic activity, and gene expression of defensomes. The median lethal concentration (LC50) of TCS (393.1μg/L) and TCC (388.1μg/L) was also determined in the same species. In TCS- and TCC-exposed B. koreanus, growth retardation and reduced fecundity were observed and were shown to have a potentially deleterious effect on the life cycle of B. koreanus. In addition, time-dependent increases in ROS content (%) and GST enzymatic activity were shown in response to TCS and TCC exposure. Additionally, transcript levels of detoxification proteins (e.g., CYPs), antioxidant proteins (e.g., GST-sigma, Cu/ZnSOD, CAT), and heat shock proteins (Hsps) were modulated in response to TCS and TCC exposure over a 24h period. Our results indicate that TCS and TCC induce oxidative stress and transcriptional regulation of detoxification, antioxidant, and heat shock proteins, resulting in changes in lifespan and fecundity.
Passive mode-locking of a Tm-doped bulk laser near 2 μm using a carbon nanotube saturable absorber
Cho, Won Bae,Schmidt, Andreas,Yim, Jong Hyuk,Choi, Sun Young,Lee, Soonil,Rotermund, Fabian,Griebner, Uwe,Steinmeyer, Gü,nter,Petrov, Valentin,Mateos, Xavier,Pujol, Maria C.,Carvajal, Joan J.,Aguil The Optical Society 2009 Optics express Vol.17 No.13
<P>Stable and self-starting mode-locking of a Tm:KLu(WO(4))(2) crystal laser is demonstrated using a transmission-type single-walled carbon nanotube (SWCNT) based saturable absorber (SA). These experiments in the 2 microm regime utilize the E11 transition of the SWCNTs for nonlinear saturable absorption. The recovery time of the SWCNT-SA is measured by pump-probe measurements as approximately 1.2 ps. The mode-locked laser delivers approximately 10 ps pulses near 1.95 microm with a maximum output power of up to 240 mW at 126 MHz repetition rate.</P>
Fabrication of coupled GaAs quantum dots and their optical properties
Kim, Jong Su,Song, Jin Dong,Byeon, Clare C.,Kang, Hoonsoo,Jeong, Mun Seok,Cho, Nam Ki,Park, Sung Jun,Choi, Won Jun,Lee, Jung Il,Kim, Jin Soo,Leem, Jae-Young,Yim, Sang-Youp,Ko, Do-Kyeong,Lee, Jongmin Wiley (John WileySons) 2009 Physica Status Solidi C Vol.6 No.4
Mass Spectrometry Analysis of In Vitro Nitration of Carbonic Anhydrase II
Lee, Soo Jae,Kang, Jeong Won,Cho, Kyung Cho,Kabir, Mohammad Humayun,Kim, Byungjoo,Yim, Yong-Hyeon,Park, Hyoung Soon,Yi, Eugene C.,Kim, Kwang Pyo Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.3
Protein tyrosine nitration is considered as an important indicator of nitrosative stresses and as one of the main factors for pathogenesis of inflammation and neuronal degeneration. In this study, we investigated various nitrosative modifications of bovine carbonic anhydrase II (CAII) through qualitative and semi-quantitative analysis using the combined strategy of Fourier transformation ion cyclotron resonance mass spectrometry (FT-ICR MS) and ion-trap tandem mass spectrometry (IT-MS/MS). FT-ICR MS and its spectra were used for the search of the pattern of nitrosative modifications. Identification of nitrosatively modified tyrosine sites were executed through IT-MS/MS. In addition, we also tried to infer the reason for the site-specific nitrosative modifications in CAII. In view of the above purpose, we have explored- i) the side chain accessibility, ii) the electrostatic environment originated from the acidic/basic amino acid residues neighboring to the nitrosatively modified site and iii) the existence of competing amino acid residues for nitration.
Passive mode locking of Yb:KLuW using a single-walled carbon nanotube saturable absorber.
Schmidt, Andreas,Rivier, Simon,Steinmeyer, Gü,nter,Yim, Jong Hyuk,Cho, Won Bae,Lee, Soonil,Rotermund, Fabian,Pujol, Maria C,Mateos, Xavier,Aguiló,, Magdalena,Dí,az, Francesc,Petrov, Va Optical Society of America 2008 Optics letters Vol.33 No.7
<P>Mode locking of an Yb-doped bulk laser in the 1 microm spectral range using a single-walled carbon nanotube saturable absorber (SWCNT-SA) is demonstrated for the first time, to our knowledge. Passive mode locking of an Yb:KLuW laser resulted in nearly transform-limited pulses as short as 115 fs at 1048 nm. In addition, the nonlinear response of the SWCNT-SA was measured, yielding a modulation depth of 0.25% and a relaxation time of 750 fs.</P>