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Jang, Jum Suk,Ahn, Chang Won,Won, Sung Sik,Kim, Ju Hun,Choi, Wonyong,Lee, Byoung-Seob,Yoon, Jang-Hee,Kim, Hyun Gyu,Lee, Jae Sung American Chemical Society 2017 The Journal of Physical Chemistry Part C Vol.121 No.28
<P>Vertically aligned core-shell PbTiO3@TiO2 heterojunction nanotube arrays are fabricated on F:SnO2 (FTO) glass substrate via a unique three-step process: an electron beam vapor deposition of Ti thin film on FTO, anodic oxidation of the Ti film to TiO2 nanotubes, and finally formation of PbTiO3 perovskite layer at the inner wall of the TiO2 nanotubes. The PbTiO3@TiO2 nanotube array exhibits dramatically improved photoactivity relative to TiO2 nanotubes or PbTiO3/TiO2 composite powders in photoelectrochemical water splitting and photocatalytic isopropyl alcohol decomposition under visible light irradiation (>420 nm). In the core-shell heterojunction electrodes, PbTiO3 serves as a visible light responsive inorganic photosensitizer with its small band gap and forms a heterojunction with TiO2 for effective charge separation.</P>
Jang, Jeonghee,Sharma, Monika,Choi, Daeil,Kang, Yun Sik,Kim, Youngjin,Min, Jiho,Sung, Hukwang,Jung, Namgee,Yoo, Sung Jong American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.31
<P>Performance degradation generated by reverse current flow during fuel cell shut-down/start-up is a big challenge for commercialization of polymer electrolyte membrane fuel cells in automobile applications. Under transient operating conditions, the formation of H<SUB>2</SUB>/O<SUB>2</SUB> boundaries on Pt surfaces and the occurrence of undesired oxygen reduction reaction (ORR) in an anode cause severe degradation of carbon supports and Pt catalysts in a cathode because of an increase of the cathode potential up to ∼1.5 V. Herein, to directly prevent the formation of H<SUB>2</SUB>/O<SUB>2</SUB> boundaries in the anode, we propose a unique metal-carbon hybrid core-shell anode catalyst having Pt nanoparticles encapsulated in nanoporous carbon shells for selective H<SUB>2</SUB> permeation. This hybrid catalyst exhibits high hydrogen oxidation reaction (HOR) selectivity along with fully subdued ORR activity during long-term operation because of the excellent stability of the carbon molecular sieves. Furthermore, the HOR-selective catalyst effectively suppresses the reverse current flow in a single cell under shut-down/start-up conditions.</P> [FIG OMISSION]</BR>
오징어 부산물의 급여가 한우암소 산육 및 도체특성에 미치는 영향
Sang Min Lee(이상민),Sun Sik Jang(장선식),Seok Dong Lee(이석동),Seong Koo Hong(홍성구),Sung Sill Lee(이성실),Jae Seok Woo(우제석) 한국생명과학회 2012 생명과학회지 Vol.22 No.1
본 연구는 한우 암소의 산육 및 도체특성에 있어 오징어 부산물의 급여 효과를 알아보기 위해 수행되었다. 한우 16두(나이 7세, 체중484.1±63.6 ㎏)를 대조구 및 처리구(오징어 부산물 첨가), 등 2그룹(각각 8두)으로 완전임의 배치하였다. 사료급여는 두 그룹 모두 자유채식토록 하여 150일간 시험을 수행하였다. 일당증체량은 처리구가대조구 보다 유의적으로 높았다(p<0.05). 시험기간 내 사료섭취량 및 사료요구율은 처리구가 대조구 보다 유의적으로 낮았다(p<0.05). 육량특성에 있어서, 등지방두께, 등심단면적 및 육량지수는 두 처리구간 비슷한 경향을 나타내었고, 도체중은 처리구가 363.4 ㎏ 대조구 353.1 ㎏으로 처리구간 유의적 차이는 없었다. 육질특성에서는 육색, 지방색, 조직감 및 성숙도는 두 그룹간 유의적 차이가 없었다. 그러나 근내지방도 및 육질 1등급 이상 출현율은 대조구 보다 처리구가 높았다. 그러므로 본 연구의 결과 오징어부산물의 급여는 한우 암소의 산육 및 도체특성을 향상시키는 것으로 생각된다. This study was conducted to evaluate the effect of feeding squid by-products on the growth performance and carcass characteristics of Hanwoo cows. Sixteen Hanwoo cows, aged 7 years and weighing 484.1±63.6 ㎏, were randomly allocated to 2 feeding groups (8 animals per group): control and treatment (fed squid by-products). Both groups were fed ad libitum for 150d. Average daily gain was significantly higher in the treatment group than in the control group (p<0.05). During the experimental period, DMI and feed conversion ratios were significantly lower in the treatment group than in the control group (p<0.05). The results of yield traits, back fat thickness, rib eye area, and yield index were similar between the two groups. Carcass weights were 363.4 ㎏ and 353.1 ㎏ for treatment and control, respectively, but these differences were not statistically significant. Quality traits such as meat color, fat color, texture, and maturity were also not significantly different between the two groups. However, marbling score and rate of appearance of high quality grade (1??, 1?, and 1) were higher in the treatment group than in the control group. These results suggest that feeding squid by-products may improve the growth performance and carcass characteristics of Hanwoo cows.
Ketamine Modulates Calcium Homeostasis in Hypoxia-Reoxygenated Cardiomyocytes
( Jang Ho Roh ),( Woo Chul Chang ),( So Yeon Lim ),( Hee Sang Song ),( Byeong Wook Song ),( Hye Jung Kim ),( Min Ji Cha ),( Yang Soo Jang ),( Nam Sik Chung ),( Yong Woo Hong ),( Ki Chul Hwang ) 한국조직공학·재생의학회 2008 조직공학과 재생의학 Vol.5 No.3
Ketamine is clinically used as an inducer of anesthesia in critically ill patients because it has more stable hemodynamics than barbiturates or inhaled anesthetic agent. It has been known the effect of anesthetic related with calcium homeostasis in myocardium but there are few studies for myocardial protection of ketamine from ischemiareperfusion injury. We therefore observed protective effects of ketamine on survival of ischemia-reoxygenated cardiomyocytes in phosphorylation levels of Erk and Akt as well as suppression of pro-apoptotic protens, Bax and cytochrome C, and induction of anti-apoptotic protein, Bcl-2. Ketamine also overcame intracellular Ca2+ overload. We observed significant induction in transcript level of calreticulin, PMCA1, ion channels(L-type Ca2+-channel, Kir3.4, Kir6.1) and suppression in transcript level of calmodulin, and SERCA 2a in ketamine-treated cardiomyocytes. In conclusion, ketamine was protective of cardiomyocytesunder hypoxia-reperfusion condition. Therefore, we have provided new insight into myocardial protection of anesthetic agents so a better understanding of the role of anesthetics in the prevention of myocardial injury may provide strategies to improve outcome.
Jang-Sik Ko(고장식),Yong-Seok Kim(김용석),Se-Young Lim(임세영),Soo-Tae Kim(김수태),Keun-Hee Kim(김근희),Sung-Hoon Hwang(황성훈),Byung-Jun Cho(조병준) 한국컴퓨터정보학회 2018 韓國컴퓨터情報學會論文誌 Vol.23 No.10
The purpose of this study was to find more effective method through comparison of manual chest compression and chest compression using AutoPulse™ device in pre-hospital simulation cardiac arrest. In order to achieve the purpose of the study, ambulance workers did two different style CPR in pre-hospital simulation cardiac arrest. Data analyzed by T test and ANOVA. Findings of this study are as follows. Firstly, manual chest compression is more effective than chest compression using AutoPulse™ device on scene. Secondly, chest compression using AutoPulse™ device is more effective manual chest compression in ambulance and in elevator. In conclusion, these findings provide strong evidence for the importance of hands off time and stable CPR before hospital arrival in explaining patient’s prognosis. Therefore, strategies to conduct precise hands off time and stable CPR are needed to improve patient’s prognosis,
( Sung Woo Park ),( Ae Rin Baek ),( Do Jin Kim ),( An Soo Jang ),( Soo Taek Uh ),( Yong Hoon Kim ),( Choon Sik Park ),( Yoon Pyo Kang ),( Sung Won Kwon ) 대한결핵 및 호흡기학회 2014 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.118 No.-
Background: Idiopathic pulmonary fibrosis (IPF) is characterized chronic progressive lung fibrosis with poor prognosis. Many part of pathogenesis of IPF is still not known. Metabolomics is the study of molecules created by cellular metabolic pathways. we hypothesize that exploring the metabolic pathways of lung tissues from IPF could revealing a clear pathogenesis of IPF Methods: Lung tissues obtained from 12 patients with IPF and from 12 normal subjects and performed global metabolomic profiling using gas chromatography coupled to mass spectrometry. Results: Through unsupervised principal component analysis (PCA), the variation and outlier of samples were monitored and the clustering patterns between IPF and control groups were confirmed. Based on this, we performed a supervised method, partial least squares discriminant analysis (PLS-DA), to establish the predictive and discriminative models. To interpret the data more reliably, the metabolites selected by PLS-DA and univariate statistical analyses due to the value of area under the receiver operator characteristic curve (AUROC) more than 0.9, were proved to have high prediction performance between the groups. The expression patterns of the identified metabolites indicated an anaerobic glycolysis, depletion of ATP, impairment of glutathione biosynthesis, and increase of ornithine-proline metabolism as distinctive metabolic phenotypes of IPF. Conclusions: Our enhanced metabolomics approach verified the existing hypotheses of pathogenesis in IPF at the metabolite level and suggested noteworthy signals of pathogenic metabolites related to IPF.