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Ion shielding functional separator using halloysite containing a negative functional moiety for stability improvement of Li–S batteries

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journal of Energy Chemistry 2021年第9期30卷 334-340页

作者： Yong Min Kwon jihoon Kim Kuk Young cho Sukeun Yoon Division of Advanced Materials Engineering&Institute for Rare Metals Kongju National UniversityChungnam 31080Republic of Korea Department of Materials Science and Chemical Engineering Hanyang UniversityGyeonggi 15588Republic of Korea

Lithium–sulfur batteries are one of the attractive next-generation energy storage systems owing to theienvironmental friendliness,low cost,and high specific energy ***,the low electrical conductivity of sulfur,shuttling of soluble intermediate polysulfides between electrodes,and low capacitretention have hampered their commercial *** address these issues,we use a halloysitemodulated(H-M)separator in a lithium–sulfur battery to mitigate the shuttling *** H-M separator acts as a mutual Coulombic repulsion in lithium-sulfur batteries,thereby selectively permitting Lions and efficiently suppressing the transfer of undesired lithium polysulfides to the Li anode sideMoreover,the use of halloysite switches the surface of the separator from hydrophobic to hydrophilicconsequently improving the electrolyte wettability and adhesion between the separator and cathodeWhen sulfur-multi-walled carbon nanotube(S-MWCNT)composites are used as cathode active materialsa lithium–sulfur battery with an H-M separator exhibits first discharge and charge capacities of 1587 an1527 m Ah g-1,***,there is a consistent capacity retention up to 100 cyclesAccordingly,our approach demonstrates an economical and easily accessible strategy for commercialization of lithium–sulfur batteries.

关键词： Li–S batteries Halloysite Ion shielding Negative functional moiety Lithium polysulfides

Measuring absolute adsorption in porous rocks using oscillatory motions of a spring-mass system

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Chinese journal of Chemical Engineering 2022年第4期35卷 131-139页

作者： Younki cho Ryan Lo Keerthana Krishnan Xiaolong Yin Hossein Kazemi Petroleum Engineering Colorado School of MinesGoldenCO 80401USA

We present an oscillation-based method to measure absolute adsorption,or total gas,contained in porous rocks without and with excess *** conducted with a macroporous Berea sandstone sample in nitrogen where excess adsorption is negligible show that absolute adsorption can be obtained after the added mass of co-accelerated gas outside the sample is *** experiments conducted in propane with a crushed Niobrara shale sample with micro-and mesopores,absolute adsorption included significant excess *** subtracting both the added mass outside the sample and the gas that would be in the sample assuming no excess adsorption existed,estimated excess adsorption of propane is in good agreement with that projected based on capillary condensation of propane in the volume of mesopores.

关键词： Adsorption Porous media Shale Capillary condensation Oscillation

肝细胞癌:高乙肝病毒负荷和经动脉化疗栓塞治疗病人的死亡率

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国际医学放射学杂志 2013年第4期 376-376页

作者： S.j. Yu j.H. Lee E.S. jang E.j. cho M.S. Kwak j.H. Yoon 刘春明 Department of Internal Medicine and Liver Research Institute Seoul National University College of Medicine101 Daehak-ro Jongno-gu Seoul 110-744 Republic of Korea

目的确定乙型肝炎病毒（HBV）DNA水平与经动脉化疗栓塞治疗（TACE）的肝细胞癌病人生存期之间的关系。材料与方法本研究经机构审查委员会批准,并免除病人知情同意书。连续纳入2005年1月—2007年3月间的183例HBV源性肝细胞癌病人。入组... 详细信息

目的确定乙型肝炎病毒（HBV）DNA水平与经动脉化疗栓塞治疗（TACE）的肝细胞癌病人生存期之间的关系。材料与方法本研究经机构审查委员会批准,并免除病人知情同意书。连续纳入2005年1月—2007年3月间的183例HBV源性肝细胞癌病人。入组病人均行TACE治疗,但未接受抗病毒治疗。所有病人均在行TACE治疗前检测血清HBV DNA水平,计算其从入组当天至死亡时的总体生存期。借助于独立的影像学评估,应用改良实体肿瘤反应评价标准评估肿瘤进展。结果总体生存期的中位数为19个月（95%CI:13.7;4.3）,疾病进展时间的中位数为4个月（95%CI:3.03;.97）。多因素分析显示,TACE术前的HBV DNA血浆水平高（>2000IU/L）是降低总体生存期[P=0.021;风险比（HR）,1.725]、癌症进展-相关高死亡率（P=0.014;HR,1.936）及癌症进展所致肝衰竭相关死亡率（P=0.005,HR,3.908）的独立危险因素。TACE术前HBV DNA水平对非癌症进展所致肝衰竭相关死亡率无显著影响。结论 TACE术前的HBV DNA血浆水平高与TACE术后较差的总体生存期和肝细胞癌的快速进展相关,病人死于癌症的快速进展而非肝炎的恶化。

关键词：肝细胞癌生存期 HBV 动脉化疗栓塞 TACE 病人死亡率

NECAB family of neuronal calcium-binding proteins in health and disease

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Neural Regeneration Research 2025年第5期20卷 1236-1243页

作者： Diones Bueno Michael K.E.Schafer Sudena Wang Michael j.Schmeisser Axel Methner Institute for Molecular Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Department of Anesthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of Anatomy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The N-terminal EF-hand calcium-binding proteins 1–3(NECAB1–3) constitute a family of predominantly neuronal proteins characterized by the presence of at least one EF-hand calcium-binding domain and a functionally less well characterized C-terminal antibiotic biosynthesis monooxygenase domain. All three family members were initially discovered due to their interactions with other proteins. NECAB1 associates with synaptotagmin-1, a critical neuronal protein involved in membrane trafficking and synaptic vesicle exocytosis. NECAB2 interacts with predominantly striatal G-protein-coupled receptors, while NECAB3 partners with amyloid-β A4 precursor protein-binding family A members 2 and 3, key regulators of amyloid-β production. This demonstrates the capacity of the family for interactions with various classes of proteins. NECAB proteins exhibit distinct subcellular localizations: NECAB1 is found in the nucleus and cytosol, NECAB2 resides in endosomes and the plasma membrane, and NECAB3 is present in the endoplasmic reticulum and Golgi apparatus. The antibiotic biosynthesis monooxygenase domain, an evolutionarily ancient component, is akin to atypical heme oxygenases in prokaryotes but is not wellcharacterized in vertebrates. Prokaryotic antibiotic biosynthesis monooxygenase domains typically form dimers, suggesting that calcium-mediated conformational changes in NECAB proteins may induce antibiotic biosynthesis monooxygenase domain dimerization, potentially activating some enzymatic properties. However, the substrate for this enzymatic activity remains uncertain. Alternatively, calcium-mediated conformational changes might influence protein interactions or the subcellular localization of NECAB proteins by controlling the availability of protein–protein interaction domains situated between the EF hands and the antibiotic biosynthesis monooxygenase domain. This review summarizes what is known about genomic organization, tissue expression, intracellular localization, interac

关键词： calcium EF hand mitochondria nervous system signal transduction

MOLECULAR DESIGN OF LIGHT EMITTING POLYMERS

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Chinese journal of Polymer Science 2000年第3期18卷 227-237页

作者： j.W.Yu j.K.Kim j.MHong Y.C.Kim H.N.cho D.Y.Kim C.Y.Kim Polymer Materials Laboratory Korea Institute of Science and TechnologyP.O.Box 131CheongryangSeoul 130-650.Korea

Fluorene-based alternating and statistical copolymers were synthesized by employing reaction methods of Wittig,Heck and *** copolymers were classified into three groups with the photoluminescence(PL)emission maxima at420,475 and 500 nm,*** copolymers with two chromophores having PL emission maxima at 420 and475 nm emitted light with the emission maximum at 475 nm on photoexcitation at 365 nm and improved the quantumefficiency by the energy ***,the intramolecular energy transfer was inefficient compared to the intermolecularenergy transfer when the two chromophores were apart from each other in the range of the Forster critical ***-pyridinedivinylene alternating copolymer was synthesized by the Wittig reaction and found to have physical,electronic andelectrochemical properties of the individual units *** double-layered light emitting diode(LED)with the statisticalcopolymer as an emitting layer and the pyridine-containing copolymer as an electron transporting-hole blocking layer,whichwere sandwiched between ITO and Al,displayed a quantum efficiency of 0.1%.

关键词： Light emitting polymers

Stress-induced cardiomyopathy with electrocardiographic ST-segment elevation in a patient with pneumothorax

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World journal of Emergency Medicine 2020年第4期11卷 260-262页

作者： jun Woo cho Chi Hoon Bae Department of Thoracic and Cardiovascular Surgery School of MedicineCatholic University of DaeguDaeguRepublic of Korea

Dear editor,In many cases,S T-segment changes on electrocardiogram(ECG)are suggestive of acute coronary syndrome,but there may be other causes,[12]such as stress induced ***,reports of such changes in patients with pneumothorax are very rare.[3-1]Here,we report a case of ST-segment elevation due to stress-induced cardiomyopathy in a patient with pneumothorax.

关键词： cardiomyopathy acute patient

Numerical Analysis of the Adhesive Forces in Nano-Scale Structure

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journal of Bionic Engineering 2006年第4期3卷 209-216页

作者： Young-Sam cho Houkseop Han Wan-Doo Kim Department of Future Technology Korea Institute of Machinery and Materials Daejeon 305-343 Republic of Korea

Nanohairs, which can be found on the epidermis of Tokay gecko＇s toes, contribute to the adhesion by means of van der Waals force, capillary force, etc. This structure has inspired many researchers to fabricate the attachable nano-scale structures. However, the efficiency of artificial nano-scale structures is not reliable sufficiently. Moreover, the mechanical parameters related to the nano-hair attachment are not yet revealed qualitatively. The mechanical parameters which have influence on the ability of adhesive nano-hairs were investigated through numerical simulation in which only van der Waals force was considered. For the numerical analysis, finite element method was utilized and van der Waals force, assumed as 12-6 Lennard-jones potential, was implemented as the body force term in the finite element formulation.

关键词： numerical analysis adhesive force nano-scale structure finite element model van der Waals force 12-6 L-j potential

Influence of haze pollution on water-soluble chemical species in PM2.5 and size-resolved particles at an urban site during fall

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journal of Environmental Sciences 2017年第7期29卷 370-382页

作者： Geun-Hye Yu Yan Zhang Sung-Yong cho Seungshik Park Department of Environment and Energy Engineering Chonnam National UniversityGwangju 61186Republic of Korea

To investigate the influence of haze on the chemical composition and formation processes of ambient aerosol particles,PM_（2.5） and size-segregated aerosol particles were collected daily during fall at an urban site of Gwangju,*** the study period,the total concentration of secondary ionic species（SIS） contributed an average of 43.9% to the PM_（2.5） ,whereas the contribution of SIS to the PM_（2.5） during the haze period was 62.3%.The NO_3 and SO^（2-）_4 concentrations in PM_（2.5） during the haze period were highly elevated,being 13.4 and 5.0 times higher than those during non-haze period,*** PM,NO^-_3,SO^（2-）_4,oxalate,water-soluble organic carbon（WSOC）,and humic-like substances（HULIS） had tri-modal size distributions peaks at 0.32,1.0,and 5.2 μm during the non-haze and haze ***,during the non-haze period they exhibited dominant size distributions at the condensation mode peaking at 0.32 μm,while on October 21 when the heaviest haze event occurred,they had predominant droplet mode size distributions peaking at 1.00 μ***,strong correlations of WSOC and HULIS with SO^（2-）_4,oxalate,and K＋at particle sizes of 〈 1.8 μm indicate that secondary processes and emissions from biomass burning could be responsible for WSOC and HULIS *** was found that the factors affecting haze formation could be the local stable synoptic conditions,including the weak surface winds and high surface pressures,the long-range transportation of haze from eastern China and upwind regions of the Korean peninsula,as well as the locally emitted and produced aerosol particles.

关键词： Haze pollution Size distribution Secondary ionic species Humic-like substances Stable synoptic conditions

Microstructure, precipitates and mechanical properties of powder bed fused inconel 718 before and after heat treatment

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journal of Materials Science & Technology 2019年第6期35卷 1153-1164页

作者： Le Zhou Abhishek Mehta Brandon McWilliams Kyu cho Yongho Sohn Advanced Materials Processing and Analysis Center University of Central Florida Orlando FL 32816 USA Department of Materials Science and Engineering University of Central Florida Orlando FL 32816 USA Weapons and Materials Research Directorate US. Amy Research Laboratory Aberdeen Proving Ground MD 21005 USA

IN718 alloy was fabricated by laser powder bed fusion(PBF) for examination of microstructure, precipitates and mechanical properties in the as-built state and after different heat treatments. The as-built alloy had a characteristic fine cellular-dendritic microstructure with Nb, Mo and Ti segregated along the interdendritic region and cellular boundary. The as-built alloys were then subjected to solution heat treatment(SHT) at 980°C or 1065°C for 1 h. SHT at 980°C led to the formation of δ-phase in the interdendritic region or cellular boundary. The segregation was completely removed by the SHT at 1065°C, but recrystallization was observed, and the carbides decorated along the grain boundaries. The as-built alloy and alloys with SHT at 980°C and 1065°C were two-step aged, which consisted of annealing at 720°C for8 h followed by annealing at 620°C for 8 h. Transmission electron microscopy revealed the precipitation of λ’ and λ" in all alloys after two-step aging, but the amount and uniformity of distribution varied. The Vickers hardness of the PBF IN718 alloy increased from 296 HV to 467 HV after direct aging. The hardness decreased to 267 HV and 235 HV after SHT at 980°C and 1065°C, respectively, but increased to 458 HV and 477 HV followed by aging. The evolution of Young’s modulus after heat treatment exhibited similar trend to that of hardness. The highest hardness was observed for IN718 after SHT at 1065°C and two-step aging due to precipitation with greater amount and uniform distribution.

关键词： Laser powder bed fusion IN718 Microstructure Transmission electron microscopy