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Critical factors to inhibit water-splitting side reaction in carbon-based electrode materials for zinc metal anodes

Carbon Energy 2022年第6期4卷 1080-1092页

作者： Dong Hyuk Kang Eunji Lee Beom Sik Youn Son Ha Jong Chan Hyun Juhee Yoon Dawon Jang Kyoung Sun Kim hyungsub Kim Sang Moon Lee Sungho Lee Hyoung-Joon Jin hyung-Kyu Lim Young Soo Yun ku-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulSeongbuk-guSouth Korea Division of Chemical Engineering and Bioengineering Kangwon National UniversityChuncheonGangwon-doSouth Korea Department of Eco-Polymer Science and Engineering Inha UniversityIncheonMichuhol-guSouth Korea Carbon Composite Materials Research Center Institute of Advanced Composite MaterialsKorea Institute of Science and Technology(KIST)Jeollabuk-doSouth Korea Department of Chemical and Biological Engineering Korea UniversitySeoulSeongbuk-guSouth Korea Neutron Science Division Korea Atomic Energy Research Institute(KAERI)DaejeonYuseong-guSouth Korea Research Center for Materials Analysis Korea Basic Science Institute(KBSI)DaejeonYuseong-guSouth Korea Department of Integrative Energy Engineering Korea UniversitySeoulSeongbuk-guSouth Korea

Zinc metal anodes(ZMA)have high theoretical capacities(820 mAh g−1 and 5855 mAh cm−3)and redox potential(−0.76 V *** hydrogen electrode),similar to the electrochemical voltage window of the hydrogen evolution reaction(HER)in a mild acidic electrolyte system,facilitating aqueous zinc batteries competitive in next-generation energy storage ***,the HER and byproduct formation effectuated by water-splitting deteriorate the electrochemical performance of ZMA,limiting their *** this study,a key factor in promoting the HER in carbon-based electrode materials(CEMs),which can provide a larger active surface area and guide uniform zinc metal deposition,was investigated using a series of threedimensional structured templating carbon electrodes(3D-TCEs)with different local graphitic orderings,pore structures,and surface *** ultramicropores of CEMs are the determining critical factors in initiating HER and clogging active surfaces by Zn(OH)2 byproduct formation,through a systematic comparative study based on the 3D-TCE series *** the 3D-TCEs had a proper graphitic structure with few ultramicropores,they showed highly stable cycling performances over 2000 cycles with average Coulombic efficiencies of≥99%.These results suggest that a well-designed CEM can lead to high-performance ZMA in aqueous zinc batteries.

关键词： aqueous batteries carbon electrode hydrogen evolution reaction multivalent ion zinc metal anode

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Inhibition of BET selectively eliminates undifferentiated pluripotent stem cells

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Science Bulletin 2018年第8期63卷 477-487页

作者： Jung Hyun Im Seon In Hwang Jong-Wan Kim soon-Jung Park Kyu-ree Kang Jueng Soo You Kee Pyo Kim Sung-Hwan Moon Hyuk-Jin Cha hyung-Min Chung Hans R. Scholer Jung Keun Hyun DongWook Han Department of Stem Cell Biology School of Medicine Konkuk University Seoul 05029 Republic of Korea Department of Nanobiomedical Science Dankook University Graduate School Cheonan 330714 Republic of Korea Department of Biochemistry School of Medicine Konkuk University Seoul 05029 Republic of Korea Department of Cell and Developmental Biology Max Planck Institute for Molecular Biomedicine 48149 Munster Germany Department of Life Sciences College of Natural Sciences Sogang University Seoul 04107 Republic of Korea ku Open-lnnovation Center. Institute of Biomedical Science & Technology Konkuk University Seoul 05029 Republic of Korea Department of Advanced Translational Medicine School of Medicine Konkuk University Seoul 05029 Republic of Korea

Embryonic stem cells （ESCs） maintain their cellular identity through the systematic regulation of master transcription factors and chromatin remodeling complexes. Recent work has shown that the unusually large-scale enhancers-namely super-enhancers （SEs）, on which BRD4, a member of the bromodomain and extraterminal domain （BET） family is highly enriched-could regulate pluripotency-related transcrip- tion factors. Moreover, inhibition of BRD4 binding on SEs has been shown to induce the differentiation of ESCs. However, the underlying mechanism of BRD4 inhibition-mediated stern cell differentiation remains elusive. Here we show that both mouse and human ESCs lose their capacity for self-renewal upon treat- ment with JQ1, a selective inhibitor of BET family including BRD4, with rapid suppression of pluripotency-associated genes. Notably, a high concentration of JQI could selectively eliminate ESCs via apoptosis, without affecting the functionality of differentiated somatic cells from ESCs, suggesting that inhibition of BET may have a beneficial effect on the development of pluripotent stem cell-based cell therapy.

关键词： Bromodomain and extraterminal domain (BET) JQ1 Pluripotent stem cells

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Modification of A3003 alloy for development of high toughness Al alloy tube

Modification of A3003 alloy for development of high toughnes...

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2006 Beijing International Conference on Aluminum Materials(2006 BICAM)

作者： Hoon Cho Byoung-Soo Lee hyung-Ho Jo Nano-materials team Advanced Materials Center Korea Institute of Industrial Technology 994-32 Dongchun-Dong Yeonsu-ku Incheon 406-130 Korea Nano-materials team Advanced Materials Center Korea Institute of Industrial Technology 994-32 Dongchun-Dong Yeonsu-ku Incheon 406-130 Korea Nano-materials team Advanced Materials Center Korea Institute of Industrial Technology 994-32 Dongchun-Dong Yeonsu-ku Incheon 406-130 Korea

The strength of aluminum alloys was improved by a severe deformation process while the decrease of elongation leads to the defect. Modification of A3003 alloy was attempted in order to develop a high strength and high formability Al alloy tube for the application of air-conditioning systems in transportation, such as passenger planes and automobiles. An A3003 alloy was modified by Ti addition, grain refiner. As a result of modification, the modified A3003 alloy was able to suitably satisfy the mechanical strength requirements, including elongation. Grain size and secondary dendrite arm spacing of A3003 alloy decreased by as much as 50 % by Ti addition. The finer grains were uniformly distributed in the modified A3003 alloy billet. The yield strength of the modified A3003 alloy was improved by 30 % without decreasing elongation.

关键词： 3003 Al alloy grain refinement Passenger plane Air-conditioning system

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Does the antibody production ability affect the serum anti-Helicobacter pylori Ig G titer?

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World Journal of Gastrointestinal Pathophysiology 2016年第3期7卷 288-295页

作者： Hyun Ah Chung Sun-Young Lee Hee Won Moon Jeong Hwan Kim In-Kyung Sung hyung Seok Park Chan Sup Shim Hye Seung Han Department of Internal Medicine Konkuk University School of Medicine Department of Laboratory Medicine Konkuk University School of Medicine Department of Pathology Konkuk University School of Medicine

AIM: To investigate the relationship between serum titers of anti-Helicobacter pylori(***) immunoglobulin G(IgG) and hepatitis B virus surface antibody(HBsA b).METHODS: Korean adults were included whose samples had positive Giemsa staining on endoscopic biopsy and were studied in the hepatitis B virus surface antigen(HBsA g)/HBsA b serologic assay,pepsinogen(PG) assay,and *** serologic test on the same *** were excluded if they were positive for HBs Ag,had a recent history of medication,or had other medical condition(s).We analyzed the effects of the following factors on serum titers of HBsA b and the *** IgG : Age,density of *** infiltration in biopsy samples,serum concentrations of PG Ⅰ and PG Ⅱ,PG Ⅰ/Ⅱ ratio,and white blood cell ***: Of 111 included subjects,74(66.7%) exhibited a positive HBsA b *** serum *** IgG titer did not correlate with the serum HBsA b titer(P = 0.185); however,it correlated with the degree of *** infiltration on gastric biopsy(P < 0.001) and serum PG Ⅱ concentration(P = 0.042).According to the density of *** infiltration on gastric biopsy,subjects could be subdivided into those with a marked(median: 3.95,range 0.82-4.00)(P = 0.458),moderate(median: 3.37,range 1.86-4.00),and mild *** infiltrations(median: 2.39,range 0.36-4.00)(P < 0.001).Subjects with a marked *** infiltration on gastric biopsy had the highest serological titer,whereas in subjects with moderate and mild *** infiltrations titers were correspondingly lower(P < 0.001).After the successful eradication,significant decreases of the degree of *** infiltration(P < 0.001),serum *** IgG titer(P < 0.001),and serum concentrations of PG I(P = 0.028) and PG Ⅱ(P = 0.028) were ***: The *** IgG assay can be used to estimate the burden of bacteria in immunocompetent hosts with *** infection,regardless of the HBsA b titer after HBV vaccination.

关键词： Antibody Helicobacter pylori Hepatitis B Immunoglobulin G Pepsinogen

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根据修订的胃肠间质瘤的病理概念EUS和MDCT诊断胃黏膜下肿瘤的作用

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国际医学放射学杂志 2009年第3期 308-308页

作者： J.S.Lim J.H.Kim W.J.hyung Y.E.Chung J.Y.Choi 周炳 Department of Diagnostic Radiology Yonsei University Health System134 Shinchon-dongSeodaemoon-kuSeoul120-752Republic of Korea or Institute of GastroenterologyYonsei University Health SystemSeoulRepublic of Korea

胃黏膜下肿瘤(SMTs)包括很多种源于胃深层的病变。毫无疑问,胃肠道间质瘤(GISTs)是胃最常见的恶性SMTs,因而对GISTs一般的诊断方法界定为SMTs诊断的扩展。最近两次会议就GISTs的分类和治疗方案达成了一致。这些会议强调了目前包括EUS和C... 详细信息

胃黏膜下肿瘤(SMTs)包括很多种源于胃深层的病变。毫无疑问,胃肠道间质瘤(GISTs)是胃最常见的恶性SMTs,因而对GISTs一般的诊断方法界定为SMTs诊断的扩展。最近两次会议就GISTs的分类和治疗方案达成了一致。这些会议强调了目前包括EUS和CT等影像学方法的作用需要修订。

关键词：胃黏膜下肿瘤胃肠道间质瘤修订

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