http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Sung Hyuk Heo,이은혜,박현희,Bum Joon Kim,Hyo Chul Youn,Young Seo Kim,Hyun Young Kim,Seong-Ho Koh,장대일 대한뇌졸중학회 2018 Journal of stroke Vol.20 No.1
Background and Purpose Carotid plaques are a strong risk factor for ischemic stroke, and plaquerupture poses an even higher risk. Although many studies have investigated the pathogenicmechanisms of carotid plaque formation, few have studied the differences in molecular mechanisms underlying the rupture and non-rupture of carotid plaques. In addition, since early diagnosis and treatment of carotid plaque rupture are critical for the prevention of ischemic stroke, many studies have sought to identify the important target molecules involved in the rupture. However, a target molecule critical in symptomatic ruptured plaques is yet to be identified. Methods A total of 79 carotid plaques were consecutively collected, and microscopically divided into ruptured and non-ruptured groups. Quantitative polymerase chain reaction array, proteomics, and immunohistochemistry were performed to compare the differences in molecular mechanisms between ruptured and non-ruptured plaques. Enzyme-linked immunosorbent assay was used to measure the differences in ATP-binding cassette subfamily A member 1 (ABCA1) levels in the serum. Results The expression of several mRNAs and proteins, including ABCA1, was higher in ruptured plaques than non-ruptured plaques. In contrast, the expression of other proteins, including β-actin, was lower in ruptured plaques than non-ruptured plaques. The increased expression of ABCA1 was consistent across several experiments, ABCA1 was positive only in the serum of patients with symptomatic ruptured plaques. Conclusions This study introduces a plausible molecular mechanism underlying carotid plaquerupture, suggesting that ABCA1 plays a role in symptomatic rupture. Further study of ABCA1 is needed to confirm this hypothesis.
Transient Global Amnesia with Transient Ischemic Attack in the Habenular Nucleus
Heo, Sung Hyuk,Park, Key Chung,Yoon, Sung Sang,Ahn, Tea Beom,Chang, Dae Il,Chung, Kyung Cheon 경희대학교 2006 慶熙醫學 Vol.22 No.1
일과성 전기억상실증은 최근 확산강조 자기공명영상에서 관찰되는 해마의 허혈성 변화로 가장 많이 보고되어 있으나 그 기전은 아직까지 명확히 밝혀져 있지 않다. 우리는 기억과 학습의 중요한 기능을 하는 것으로 알려진 고삐핵의 일과성허혈발작에 의한 일과성 전기억상실증을 경험하여 보고하는 바이다. 환자는 증상발현 7시간과 96시간 이후에 연속적으로 확산강조 자기공명영상을 시행하였고, 처음 영상에서 나타난 고삐핵의 매우 작은 고신호강도 병변이 이후 영상에서는 관찰되지 않았다. The TGA can be produced by the small and discrete thalamic structure like habenular nucleus that is thought to be related with the cholinergic network for learning and memory in the central nervous system.
Heo, Jin Hyuck,Lee, Seung-Chul,Jung, Su-Kyo,Kwon, O-Pil,Im, Sang Hyuk The Royal Society of Chemistry 2017 Journal of materials chemistry. A, Materials for e Vol.5 No.39
<▼1><P>Highly efficient and thermally stable inverted MAPbI3 and FAPbI3−xBr<I>x</I> perovskite planar solar cells are demonstrated by using a <I>N</I>,<I>N</I>′-bis(phenylmethyl)naphthalene-1,4,5,8-tetracarboxylicdiimide (NDI-PM)-based electron transporting material (ETM) instead of a conventional PCBM-based ETM.</P></▼1><▼2><P>Highly efficient and thermally stable inverted CH3NH3PbI3 (MAPbI3) and HC(NH2)2PbI3−xBrx (FAPbI3−xBrx) perovskite planar solar cells are demonstrated by using a <I>N</I>,<I>N</I>′-bis(phenylmethyl)naphthalene-1,4,5,8-tetracarboxylic diimide (NDI-PM)-based electron transporting material (ETM) instead of a conventional fullerene-based phenyl-C61-butyric acid methyl ester (PCBM) ETM. The MAPbI3 and FAPbI3−xBrx devices with the NDI-PM-based ETM exhibit 18.4% and 19.6% power conversion efficiency under an illumination of 1 Sun (100 mW cm<SUP>−2</SUP>), respectively, which are comparable to the efficiency of PCBM ETM-based ones (18.9% and 20.0%). The improved thermal stability of NDI-based perovskite solar cells is attributed to much stronger hydrogen bonds in the NDI-PM molecular crystals than the PCBM crystals.</P></▼2>
Heo, Jin Hyuck,Park, Sungmin,Im, Sang Hyuk,Son, Hae Jung American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.45
<P>In perovskite solar cells (PSCs), overlying hole transporting materials (HTMs) are important for achieving high efficiencies as well as protecting perovskite active layers from degradation factors. This study reports the synthesis of a dopant-free HTM based on a D'-A-D-A-D-A-D' (D, D': electron donor, A: electron acceptor) conjugated structure and incorporation of the HTM into a PSC. The resulting PSC exhibits a high efficiency of 17.3%, which is comparable to that of the device based on doped spiro-OMeTAD HTM, and exhibits much improved stability: without encapsulation, the PSC based on the new HTM was found to retain 80% of its initial performance over 500 h under the conditions of 60% relative humidity/1 sun light-soaking without encapsulation. The high performance is attributed to efficient hole-extraction/collection and hole transport. We demonstrate that the extended pi-structure of the D'-A-D-A-D-A-D'-type HTM slows moisture intrusion and protects the perovskite layer better than smaller D-A-type molecules. The improved stability is primarily due to the hydrophobic nature of the HTM; the relatively large pi-conjugated molecule forms denser films, which effectively decrease the spaces between the molecules and retard water intrusion. The dopant-free D-A-type HTM with an extended pi-structure is effective not only in improving device efficiency, but also device stability.</P>
Heo, Jin Hyuck,Im, Sang Hyuk,Kim, Hi-jung,Boix, Pablo P.,Lee, Suk Joong,Seok, Sang Il,Mora-Seró,, Ivá,n,Bisquert, Juan American Chemical Society 2012 JOURNAL OF PHYSICAL CHEMISTRY C - Vol.116 No.39
<P>The Sb<SUB>2</SUB>S<SUB>3</SUB>-sensitized photoelectrochemical cells (Sb<SUB>2</SUB>S<SUB>3</SUB>–SPECs) in cobalt electrolyte were fabricated by depositing Sb<SUB>2</SUB>S<SUB>3</SUB> on the macroporous TiO<SUB>2</SUB> nanorods electrodes and consecutively spin-coating P3HT (Poly-3-hexylthiophene) interlayer to relieve the mass transport problem at vicinity of Sb<SUB>2</SUB>S<SUB>3</SUB> and cobalt redox couples and reduce the backward recombination. Through the introduction of P3HT interlayer, we could greatly enhance the power conversion efficiency of Sb<SUB>2</SUB>S<SUB>3</SUB>–SPEC to 4.2% at 1 sun illumination, whereas the Sb<SUB>2</SUB>S<SUB>3</SUB>–SPEC without P3HT interlayer exhibits 3.2% of device efficiency. The electrochemical impedance analysis let us know that the improved device performance was mainly attributed to the reduced backward recombination building up the higher open circuit voltage.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2012/jpccck.2012.116.issue-39/jp305150s/production/images/medium/jp-2012-05150s_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp305150s'>ACS Electronic Supporting Info</A></P>
Stable semi-transparent CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> planar sandwich solar cells
Heo, Jin Hyuck,Han, Hye Ji,Lee, Minho,Song, Myungkwan,Kim, Dong Ho,Im, Sang Hyuk The Royal Society of Chemistry 2015 ENERGY AND ENVIRONMENTAL SCIENCE Vol.8 No.10
<P>Semi-transparent CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> (MAPbI<SUB>3</SUB>) planar sandwich solar cells could be fabricated by simply laminating an FTO (F doped tin oxide)/TiO<SUB>2</SUB>/MAPbI<SUB>3</SUB>/wet hole transporting material (HTM) with additives and PEDOT:PSS (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid))/indium tin oxide (ITO). The best FTO/TiO<SUB>2</SUB>/MAPbI<SUB>3</SUB>/P3HT with additives/PEDOT:PSS/ITO planar sandwich structured solar cells exhibited a 12.8% (deviation: 11.7% ± 0.74%) average power conversion efficiency (<I>η</I><SUB>avg</SUB>) but poor visible transmittance due to strong absorption by P3HT. Meanwhile, the semi-transparent FTO/TiO<SUB>2</SUB>/MAPbI<SUB>3</SUB>/PTAA with additives/PEDOT:PSS/ITO planar sandwich solar cells exhibited a 15.8% (deviation: 14.45% ± 0.76%) <I>η</I><SUB>avg</SUB> without significant <I>J</I>–<I>V</I> hysteresis with respect to the forward and reverse scan directions. The average visible transmittance (AVT) was controlled from 17.3% to 6.3% and the corresponding <I>η</I><SUB>avg</SUB> changed from 12.55% to 15.8%. The unsealed sandwich planar perovskite solar cells exhibited great air and humidity stability over 20 days due to the self-passivated device architecture of the sandwich type device.</P> <P>Graphic Abstract</P><P>Semi-transparent MAPbI<SUB>3</SUB> planar sandwich solar cells were fabricated by simply laminating an F doped tin oxide/TiO<SUB>2</SUB>/MAPbI<SUB>3</SUB>/wet hole transporting material with additives and PEDOT:PSS/indium tin oxide (ITO). <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5ee01050k'> </P>
Heo, Jin Hyuck,Shin, Dong Hee,Lee, Myung Lae,Kang, Man Gu,Im, Sang Hyuk American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.37
<P>Flexible Ti metal substrate-based efficient planar-type CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> (MAPbI<SUB>3</SUB>) organic-inorganic hybrid perovskite solar cells are fabricated by lamination of the flexible Ti metal substrate/dense TiO<SUB>2</SUB> electron-transporting layer formed by anodization/MAPbI<SUB>3</SUB>/polytriarylamine and the graphene/polydimethylsiloxane (PDMS) transparent electrode substrate. By adjusting the anodization reaction time of the polished Ti metal substrate and the number of graphene layers in the graphene/PDMS electrode, we can demonstrate the planar-type MAPbI<SUB>3</SUB> flexible solar cells with a power conversion efficiency of 15.0% (mask area = 1 cm<SUP>2</SUP>) under 1 sun condition.</P> [FIG OMISSION]</BR>