http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Lee, Seungwon,Kim, Hyekang,You, Gihoon,Kim, Young-Min,Lee, Seunghun,Le, Viet-Hoan,Kwon, Ohseop,Im, Sin-Hyeog,Kim, You-Me,Kim, Kwang Soon,Sung, Young Chul,Kim, Ki Hean,Surh, Charles D.,Park, Yunji,Lee, American Society of Hematology 2019 Blood Vol.134 No.16
<B>Abstract</B><P>Lee and colleagues investigated the role of the intestinal microbiota in steady-state hematopoieisis, demonstrating that microbiota-derived DNA circulates to the bone marrow, where uptake by mononuclear cells leads to inflammatory cytokine production favoring myeloid-cell maturation of hematopoietic progenitors.</P>
Lee, Byung Yang,Seo, Sung Min,Lee, Dong Joon,Lee, Minbaek,Lee, Joohyung,Cheon, Jun-Ho,Cho, Eunju,Lee, Hyunjoong,Chung, In-Young,Park, Young June,Kim, Suhwan,Hong, Seunghun Royal Society of Chemistry 2010 Lab on a chip Vol.10 No.7
<P>We developed a carbon nanotube (CNT)-based biosensor <I>system</I>-<I>on</I>-<I>a</I>-<I>chip</I> (SoC) for the detection of a neurotransmitter. Here, 64 CNT-based sensors were integrated with silicon-based signal processing circuits in a single chip, which was made possible by combining several technological breakthroughs such as <I>efficient signal processing</I>, <I>uniform CNT networks</I>, and <I>biocompatible functionalization of CNT</I>-<I>based sensors</I>. The chip was utilized to detect glutamate, a neurotransmitter, where ammonia, a byproduct of the enzymatic reaction of glutamate and glutamate oxidase on CNT-based sensors, modulated the conductance signals to the CNT-based sensors. This is a major technological advancement in the integration of CNT-based sensors with microelectronics, and this chip can be readily integrated with larger scale lab-on-a-chip (LoC) systems for various applications such as LoC systems for neural networks.</P> <P>Graphic Abstract</P><P>Uniform arrays of carbon nanotube (CNT)-based biosensors were integrated with CMOS signal-processing circuits into a CNT-biosensor system-on-a-chip (SoC) for the detection of glutamate, a neurotransmitter. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b916975j'> </P>
Lee, Minbaek,Lee, Joohyung,Kim, Tae Hyun,Lee, Hyungwoo,Lee, Byung Yang,Park, June,Jhon, Young Min,Seong, Maeng-Je,Hong, Seunghun IOP Pub 2010 Nanotechnology Vol.21 No.5
<P>Nanoscale sensors based on single-walled carbon nanotube (SWNT) networks have been considered impractical due to several fundamental limitations such as a poor sensitivity and small signal-to-noise ratio. Herein, we present a strategy to overcome these fundamental problems and build highly-sensitive low-noise nanoscale sensors simply by controlling the structure of the SWNT networks. In this strategy, we prepared nanoscale width channels based on aligned SWNT networks using a directed assembly strategy. Significantly, the aligned network-based sensors with narrower channels exhibited even better signal-to-noise ratio than those with wider channels, which is opposite to conventional random network-based sensors. As a proof of concept, we demonstrated 100 nm scale low-noise sensors to detect mercury ions with the detection limit of ∼1 pM, which is superior to any state-of-the-art portable detection system and is below the allowable limit of mercury ions in drinking water set by most government environmental protection agencies. This is the first demonstration of 100 nm scale low-noise sensors based on SWNT networks. Considering the increased interests in high-density sensor arrays for healthcare and environmental protection, our strategy should have a significant impact on various industrial applications. </P>
Lee, Seunghun,Ji, Kwang-sun,Park, Hyomin,Tark, Sung Ju,Park, Sungeun,Lee, Jeong Chul,Kim, Won Mok,Kang, Yoonmook,Lee, Hae-Seok,Kim, Donghwan Elsevier 2015 THIN SOLID FILMS - Vol.589 No.-
<P><B>Abstract</B></P> <P>We investigated the structural, optical, and electrical properties of Zn–In–Sn–O (ZITO) films prepared by RF magnetron sputtering for silicon heterojunction solar cells. The effects of Zn addition on the properties of the as-grown films were examined. XRD patterns of the ZITO films deposited at room temperature showed a broad peak. The cross-sectional TEM image of ZITO films at low Zn levels exhibited a typical fine or nanostructure embedded in an amorphous phase. On the other hand, at higher Zn addition, the films exhibited a completely amorphous phase. The carrier concentration decreased with increasing Zn content. The lowest electrical resistivity of 5.5×10<SUP>-4</SUP> Ωcm was observed for a ZITO film with 4.83 Znat.%. All ZITO films grown in this study showed transmittance of over 80% in the visible and near-infrared spectral range. The absorption was less than 5% in the visible region.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Zn–In–Sn–O(ZITO) films with various Zn and Sn contents prepared by RF magnetron sputtering </LI> <LI> Some ZITO films exhibited nanocrystalline structures embedded in an amorphous phase. </LI> <LI> The electrical and optical properties improved with increasing Zn content. </LI> </UL> </P>
Inferior mesenteric arteriovenous fistula
Seunghun Lee,Jooweon Chung,Byungkwon Ahn,Seunghyun Lee,Sunguhn Baek 대한외과학회 2017 Annals of Surgical Treatment and Research Vol.93 No.4
Arteriovenous fistula (AVF) involving the inferior mesenteric artery and vein is very rare with only 33 cases described in the literature and may be of congenital or acquired (iatrogenic or traumatic) or idiopathic etiology. The pathophysiology of AVF that acts as a left-to-right shunt has accounted for clinical signs and symptoms associated with ischemic colitis, portal hypertension, and heart failure. A low incidence and nonspecific clinical signs and symptoms such as abdominal pain, thrill and mass, lower and upper gastrointestinal bleeding make it difficult to establish a diagnosis of inferior mesenteric AVF. Diagnosis of inferior mesenteric AVF is usually established by radiological or intraoperative examination. We report a case of idiopathic inferior mesenteric AVF causing ischemic colitis in a 56-year-old man that was diagnosed preoperatively by multidetector computed tomography and angiography and successfully treated by surgical resection.
Lee, Seunghun,Choi, Jong-Ryul,Song, Hyerin,Kang, Tae Young,Oh, Jin-woo,Kim, Kyujung IEEE 2016 Journal of Lightwave Technology Vol.34 No.17
<P>A nano-tip-based plasmonic double-gate structure (NPDS) excited by the surface plasmon polariton (SPP) resonance of the gate electrode has recently been proposed to achieve the specifications of the UV laser-induced copper cathode. The function of the NPDS is to generate a high bunch charge via near-infrared laser-induced field emission without increasing the cathode size. In this study, we report detailed numerical studies of the proposed NPDS to elucidate the physical mechanism of SPP propagation and light-tip coupling via internal SPP resonance. The simulation results show the relationship between the internal SPP resonance and the tip-light coupling in the NPDS, and the feasibility to achieve significant field emission enhancements with the NPDS. Understanding the internal SPP field in the plasmonic double-gate structure and the light field-tip coupling process in the NPDS is of practical importance in designing field emitter devices and could become an important factor in future high-brightness free-electron laser cathodes and high-sensitivity optical biosensors.</P>
Two-Photon Microscopy of the Mouse Peripheral Cornea Ex Vivo
Lee, Jun Ho,Kim, Ki Hean,Lee, Seunghun,Jeong, Hyerin,Kim, Myoung Joon Wolters Kluwer Health, Inc. All rights reserved. 2016 Cornea Vol.35 No.suppl1
PURPOSE:: To investigate the 3-dimensional (3D) cell and extracellular matrix (ECM) structure of mouse peripheral corneas in normal and corneal neovascularization tissues using 2-photon microscopy (TPM) based on both intrinsic and extrinsic moxifloxacin contrasts. METHODS:: Peripheral corneas in freshly enucleated mouse eyes were imaged by TPM based on both intrinsic and extrinsic contrasts. Intrinsic autofluorescence and second harmonic generation were used to image cells and ECM collagen, respectively. Moxifloxacin ophthalmic solution was applied to image cells. The peripheral cornea, limbus, and sclera were imaged in 3D. In addition to normal mice, mouse models of suture-induced corneal neovascularization were imaged to visualize changes in the microstructure. RESULTS:: Complex 3D cell and ECM structures in the cornea, limbus, and sclera were visualized by TPM. TPM images based on intrinsic contrasts visualized both cell and ECM structures, and TPM images based on moxifloxacin visualized cell structures with enhanced contrast. On the limbus side of the mouse peripheral cornea, TPM images visualized the vasculature in the limbus, the trabecular meshwork/Schlemm canal, iris, and ciliary body. On the scleral side, TPM images visualized cell and ECM structures in the sclera and multiple cell layers below the sclera. TPM images of the peripheral cornea in the corneal neovascularization condition visualized the extension of vasculature from the limbus to the cornea. CONCLUSIONS:: TPM imaging based on both intrinsic and external moxifloxacin contrasts visualized detailed 3D cell and ECM microstructures in the mouse peripheral cornea. TPM based on moxifloxacin might be advantageous for studying cell structures by enhancing image contrast.